/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/bench/exp1x3.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-98707888a4ba860d5b57d27ee0e051c5b948cbbf-9870788 [2021-06-01 18:04:31,536 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-01 18:04:31,538 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-01 18:04:31,567 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-01 18:04:31,609 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 [2021-06-01 18:04:31,636 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-01 18:04:31,636 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-01 18:04:31,636 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-01 18:04:31,636 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-01 18:04:31,638 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-01 18:04:31,638 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-01 18:04:31,638 INFO L138 SettingsManager]: * Use SBE=true [2021-06-01 18:04:31,638 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-01 18:04:31,638 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-01 18:04:31,638 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-01 18:04:31,639 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-01 18:04:31,639 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-01 18:04:31,639 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-01 18:04:31,639 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-01 18:04:31,639 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-01 18:04:31,639 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-01 18:04:31,640 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-01 18:04:31,640 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-01 18:04:31,640 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-01 18:04:31,640 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-01 18:04:31,640 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-01 18:04:31,640 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-01 18:04:31,640 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-01 18:04:31,640 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-01 18:04:31,640 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-01 18:04:31,640 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-01 18:04:31,640 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-01 18:04:31,640 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-01 18:04:31,641 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-01 18:04:31,641 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-01 18:04:31,641 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-01 18:04:31,641 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-01 18:04:31,874 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-01 18:04:31,887 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-01 18:04:31,888 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-01 18:04:31,889 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-01 18:04:31,889 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-01 18:04:31,890 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp1x3.wvr.bpl [2021-06-01 18:04:31,904 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp1x3.wvr.bpl' [2021-06-01 18:04:31,927 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-01 18:04:31,928 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-01 18:04:31,933 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-01 18:04:31,933 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-01 18:04:31,933 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-01 18:04:31,941 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.06 06:04:31" (1/1) ... [2021-06-01 18:04:31,946 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.06 06:04:31" (1/1) ... [2021-06-01 18:04:31,950 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-01 18:04:31,951 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-01 18:04:31,952 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-01 18:04:31,952 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-01 18:04:31,957 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.06 06:04:31" (1/1) ... [2021-06-01 18:04:31,957 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.06 06:04:31" (1/1) ... [2021-06-01 18:04:31,957 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.06 06:04:31" (1/1) ... [2021-06-01 18:04:31,958 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.06 06:04:31" (1/1) ... [2021-06-01 18:04:31,959 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.06 06:04:31" (1/1) ... [2021-06-01 18:04:31,960 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.06 06:04:31" (1/1) ... [2021-06-01 18:04:31,961 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.06 06:04:31" (1/1) ... [2021-06-01 18:04:31,961 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-01 18:04:31,962 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-01 18:04:31,962 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-01 18:04:31,962 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-01 18:04:31,964 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.06 06:04:31" (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 [2021-06-01 18:04:32,026 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-01 18:04:32,027 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-01 18:04:32,027 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-01 18:04:32,027 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-01 18:04:32,027 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-01 18:04:32,027 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-01 18:04:32,027 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-01 18:04:32,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-01 18:04:32,027 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-01 18:04:32,028 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-01 18:04:32,140 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-01 18:04:32,140 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-01 18:04:32,141 INFO L202 PluginConnector]: Adding new model exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.06 06:04:32 BoogieIcfgContainer [2021-06-01 18:04:32,141 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-01 18:04:32,142 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-01 18:04:32,143 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-01 18:04:32,144 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-01 18:04:32,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.06 06:04:31" (1/2) ... [2021-06-01 18:04:32,145 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fd7d003 and model type exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.06 06:04:32, skipping insertion in model container [2021-06-01 18:04:32,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.06 06:04:32" (2/2) ... [2021-06-01 18:04:32,146 INFO L111 eAbstractionObserver]: Analyzing ICFG exp1x3.wvr.bpl [2021-06-01 18:04:32,153 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-01 18:04:32,153 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-01 18:04:32,154 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-01 18:04:32,154 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-01 18:04:32,184 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-01 18:04:32,202 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-01 18:04:32,220 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-01 18:04:32,220 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-01 18:04:32,220 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-01 18:04:32,220 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-01 18:04:32,221 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-01 18:04:32,221 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-01 18:04:32,221 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-01 18:04:32,221 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-01 18:04:32,229 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 24 places, 19 transitions, 54 flow [2021-06-01 18:04:32,250 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 31 states, 29 states have (on average 1.896551724137931) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:32,252 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 29 states have (on average 1.896551724137931) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:32,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-01 18:04:32,256 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:04:32,256 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:04:32,256 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:04:32,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:04:32,260 INFO L82 PathProgramCache]: Analyzing trace with hash -64585232, now seen corresponding path program 1 times [2021-06-01 18:04:32,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:04:32,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40358397] [2021-06-01 18:04:32,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:04:32,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:04:32,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:04:32,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:04:32,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40358397] [2021-06-01 18:04:32,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40358397] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:04:32,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:04:32,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-01 18:04:32,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609615412] [2021-06-01 18:04:32,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-01 18:04:32,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:04:32,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-01 18:04:32,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-01 18:04:32,371 INFO L87 Difference]: Start difference. First operand has 31 states, 29 states have (on average 1.896551724137931) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:32,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:04:32,394 INFO L93 Difference]: Finished difference Result 54 states and 102 transitions. [2021-06-01 18:04:32,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-01 18:04:32,395 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-01 18:04:32,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:04:32,401 INFO L225 Difference]: With dead ends: 54 [2021-06-01 18:04:32,401 INFO L226 Difference]: Without dead ends: 47 [2021-06-01 18:04:32,402 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-01 18:04:32,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-06-01 18:04:32,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 38. [2021-06-01 18:04:32,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 37 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) [2021-06-01 18:04:32,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 71 transitions. [2021-06-01 18:04:32,430 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 71 transitions. Word has length 11 [2021-06-01 18:04:32,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:04:32,431 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 71 transitions. [2021-06-01 18:04:32,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:32,432 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 71 transitions. [2021-06-01 18:04:32,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-01 18:04:32,433 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:04:32,433 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:04:32,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-01 18:04:32,434 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:04:32,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:04:32,438 INFO L82 PathProgramCache]: Analyzing trace with hash 732040690, now seen corresponding path program 1 times [2021-06-01 18:04:32,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:04:32,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397426047] [2021-06-01 18:04:32,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:04:32,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:04:32,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:04:32,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:04:32,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397426047] [2021-06-01 18:04:32,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397426047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:32,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436249336] [2021-06-01 18:04:32,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:04:32,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:04:32,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-01 18:04:32,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:04:32,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:04:32,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436249336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:32,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:04:32,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-06-01 18:04:32,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716841277] [2021-06-01 18:04:32,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-01 18:04:32,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:04:32,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-01 18:04:32,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-01 18:04:32,588 INFO L87 Difference]: Start difference. First operand 38 states and 71 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:32,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:04:32,627 INFO L93 Difference]: Finished difference Result 68 states and 120 transitions. [2021-06-01 18:04:32,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-01 18:04:32,627 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-01 18:04:32,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:04:32,628 INFO L225 Difference]: With dead ends: 68 [2021-06-01 18:04:32,628 INFO L226 Difference]: Without dead ends: 68 [2021-06-01 18:04:32,628 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 36.7ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:04:32,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-06-01 18:04:32,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 39. [2021-06-01 18:04:32,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 38 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) [2021-06-01 18:04:32,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 75 transitions. [2021-06-01 18:04:32,633 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 75 transitions. Word has length 13 [2021-06-01 18:04:32,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:04:32,633 INFO L482 AbstractCegarLoop]: Abstraction has 39 states and 75 transitions. [2021-06-01 18:04:32,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:32,633 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 75 transitions. [2021-06-01 18:04:32,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-01 18:04:32,634 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:04:32,634 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:04:32,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-01 18:04:32,851 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:04:32,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:04:32,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1434845998, now seen corresponding path program 1 times [2021-06-01 18:04:32,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:04:32,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295544718] [2021-06-01 18:04:32,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:04:32,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:04:32,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:04:32,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:04:32,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295544718] [2021-06-01 18:04:32,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295544718] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:04:32,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:04:32,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-01 18:04:32,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38360755] [2021-06-01 18:04:32,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-01 18:04:32,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:04:32,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-01 18:04:32,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-01 18:04:32,904 INFO L87 Difference]: Start difference. First operand 39 states and 75 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:32,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:04:32,927 INFO L93 Difference]: Finished difference Result 47 states and 84 transitions. [2021-06-01 18:04:32,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-01 18:04:32,928 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-01 18:04:32,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:04:32,930 INFO L225 Difference]: With dead ends: 47 [2021-06-01 18:04:32,932 INFO L226 Difference]: Without dead ends: 40 [2021-06-01 18:04:32,932 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-01 18:04:32,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-06-01 18:04:32,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2021-06-01 18:04:32,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:32,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 69 transitions. [2021-06-01 18:04:32,935 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 69 transitions. Word has length 13 [2021-06-01 18:04:32,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:04:32,936 INFO L482 AbstractCegarLoop]: Abstraction has 37 states and 69 transitions. [2021-06-01 18:04:32,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:32,936 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 69 transitions. [2021-06-01 18:04:32,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-01 18:04:32,936 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:04:32,936 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:04:32,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-01 18:04:32,936 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:04:32,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:04:32,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1306103410, now seen corresponding path program 2 times [2021-06-01 18:04:32,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:04:32,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236348319] [2021-06-01 18:04:32,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:04:32,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:04:32,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:04:32,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:04:32,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236348319] [2021-06-01 18:04:32,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236348319] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:04:32,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:04:32,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-01 18:04:32,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252899498] [2021-06-01 18:04:32,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-01 18:04:32,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:04:32,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-01 18:04:32,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-01 18:04:32,978 INFO L87 Difference]: Start difference. First operand 37 states and 69 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:33,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:04:33,004 INFO L93 Difference]: Finished difference Result 44 states and 83 transitions. [2021-06-01 18:04:33,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-01 18:04:33,004 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-01 18:04:33,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:04:33,004 INFO L225 Difference]: With dead ends: 44 [2021-06-01 18:04:33,004 INFO L226 Difference]: Without dead ends: 44 [2021-06-01 18:04:33,005 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 12.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-01 18:04:33,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-06-01 18:04:33,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2021-06-01 18:04:33,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.9230769230769231) internal successors, (75), 39 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) [2021-06-01 18:04:33,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 75 transitions. [2021-06-01 18:04:33,017 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 75 transitions. Word has length 13 [2021-06-01 18:04:33,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:04:33,017 INFO L482 AbstractCegarLoop]: Abstraction has 40 states and 75 transitions. [2021-06-01 18:04:33,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:33,017 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 75 transitions. [2021-06-01 18:04:33,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-01 18:04:33,018 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:04:33,018 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:04:33,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-01 18:04:33,018 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:04:33,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:04:33,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1806788944, now seen corresponding path program 1 times [2021-06-01 18:04:33,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:04:33,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492926480] [2021-06-01 18:04:33,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:04:33,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:04:33,057 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:04:33,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:04:33,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492926480] [2021-06-01 18:04:33,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492926480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:33,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685622890] [2021-06-01 18:04:33,058 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 [2021-06-01 18:04:33,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:04:33,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-01 18:04:33,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:04:33,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:04:33,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685622890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:33,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:04:33,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 4 [2021-06-01 18:04:33,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013744386] [2021-06-01 18:04:33,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-01 18:04:33,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:04:33,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-01 18:04:33,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-01 18:04:33,157 INFO L87 Difference]: Start difference. First operand 40 states and 75 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:33,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:04:33,187 INFO L93 Difference]: Finished difference Result 97 states and 185 transitions. [2021-06-01 18:04:33,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-01 18:04:33,188 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-01 18:04:33,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:04:33,189 INFO L225 Difference]: With dead ends: 97 [2021-06-01 18:04:33,189 INFO L226 Difference]: Without dead ends: 90 [2021-06-01 18:04:33,189 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.5ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-01 18:04:33,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-06-01 18:04:33,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 66. [2021-06-01 18:04:33,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.0923076923076924) internal successors, (136), 65 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:33,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 136 transitions. [2021-06-01 18:04:33,193 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 136 transitions. Word has length 15 [2021-06-01 18:04:33,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:04:33,193 INFO L482 AbstractCegarLoop]: Abstraction has 66 states and 136 transitions. [2021-06-01 18:04:33,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:33,193 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 136 transitions. [2021-06-01 18:04:33,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-01 18:04:33,194 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:04:33,194 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:04:33,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:04:33,409 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:04:33,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:04:33,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1307356592, now seen corresponding path program 2 times [2021-06-01 18:04:33,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:04:33,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241976904] [2021-06-01 18:04:33,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:04:33,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:04:33,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-01 18:04:33,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:04:33,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241976904] [2021-06-01 18:04:33,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241976904] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 18:04:33,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 18:04:33,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-01 18:04:33,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428226495] [2021-06-01 18:04:33,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-01 18:04:33,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:04:33,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-01 18:04:33,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-01 18:04:33,441 INFO L87 Difference]: Start difference. First operand 66 states and 136 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) [2021-06-01 18:04:33,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:04:33,471 INFO L93 Difference]: Finished difference Result 115 states and 230 transitions. [2021-06-01 18:04:33,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-01 18:04:33,471 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 [2021-06-01 18:04:33,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:04:33,472 INFO L225 Difference]: With dead ends: 115 [2021-06-01 18:04:33,472 INFO L226 Difference]: Without dead ends: 108 [2021-06-01 18:04:33,473 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.0ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-01 18:04:33,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-06-01 18:04:33,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 83. [2021-06-01 18:04:33,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.1707317073170733) internal successors, (178), 82 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:33,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 178 transitions. [2021-06-01 18:04:33,479 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 178 transitions. Word has length 15 [2021-06-01 18:04:33,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:04:33,479 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 178 transitions. [2021-06-01 18:04:33,480 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) [2021-06-01 18:04:33,480 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 178 transitions. [2021-06-01 18:04:33,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-01 18:04:33,480 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:04:33,480 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:04:33,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-01 18:04:33,481 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:04:33,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:04:33,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1128288690, now seen corresponding path program 3 times [2021-06-01 18:04:33,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:04:33,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305507559] [2021-06-01 18:04:33,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:04:33,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:04:33,536 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:04:33,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:04:33,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305507559] [2021-06-01 18:04:33,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305507559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:33,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061212822] [2021-06-01 18:04:33,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:04:33,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-01 18:04:33,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:04:33,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-01 18:04:33,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:04:33,665 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:04:33,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061212822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:33,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:04:33,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-01 18:04:33,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412403206] [2021-06-01 18:04:33,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-01 18:04:33,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:04:33,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-01 18:04:33,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-01 18:04:33,666 INFO L87 Difference]: Start difference. First operand 83 states and 178 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:33,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:04:33,894 INFO L93 Difference]: Finished difference Result 164 states and 313 transitions. [2021-06-01 18:04:33,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-01 18:04:33,895 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-01 18:04:33,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:04:33,896 INFO L225 Difference]: With dead ends: 164 [2021-06-01 18:04:33,896 INFO L226 Difference]: Without dead ends: 164 [2021-06-01 18:04:33,897 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 144.9ms TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2021-06-01 18:04:33,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-06-01 18:04:33,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 80. [2021-06-01 18:04:33,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1392405063291138) internal successors, (169), 79 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:33,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 169 transitions. [2021-06-01 18:04:33,902 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 169 transitions. Word has length 17 [2021-06-01 18:04:33,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:04:33,902 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 169 transitions. [2021-06-01 18:04:33,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:33,902 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 169 transitions. [2021-06-01 18:04:33,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-01 18:04:33,903 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:04:33,903 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:04:34,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:04:34,104 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:04:34,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:04:34,104 INFO L82 PathProgramCache]: Analyzing trace with hash -2080643090, now seen corresponding path program 4 times [2021-06-01 18:04:34,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:04:34,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168976362] [2021-06-01 18:04:34,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:04:34,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:04:34,135 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:04:34,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:04:34,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168976362] [2021-06-01 18:04:34,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168976362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:34,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096879187] [2021-06-01 18:04:34,136 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:04:34,154 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:04:34,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:04:34,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-01 18:04:34,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:04:34,235 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:04:34,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096879187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:34,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:04:34,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-01 18:04:34,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258484986] [2021-06-01 18:04:34,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-01 18:04:34,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:04:34,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-01 18:04:34,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-01 18:04:34,236 INFO L87 Difference]: Start difference. First operand 80 states and 169 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:34,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:04:34,386 INFO L93 Difference]: Finished difference Result 167 states and 311 transitions. [2021-06-01 18:04:34,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-01 18:04:34,386 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-01 18:04:34,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:04:34,387 INFO L225 Difference]: With dead ends: 167 [2021-06-01 18:04:34,387 INFO L226 Difference]: Without dead ends: 153 [2021-06-01 18:04:34,387 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 87.5ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-01 18:04:34,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-06-01 18:04:34,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 104. [2021-06-01 18:04:34,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.1553398058252426) internal successors, (222), 103 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:34,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 222 transitions. [2021-06-01 18:04:34,391 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 222 transitions. Word has length 17 [2021-06-01 18:04:34,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:04:34,391 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 222 transitions. [2021-06-01 18:04:34,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:34,391 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 222 transitions. [2021-06-01 18:04:34,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-01 18:04:34,392 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:04:34,392 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:04:34,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:04:34,608 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:04:34,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:04:34,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1781820862, now seen corresponding path program 5 times [2021-06-01 18:04:34,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:04:34,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831259464] [2021-06-01 18:04:34,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:04:34,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:04:34,635 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:04:34,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:04:34,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831259464] [2021-06-01 18:04:34,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831259464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:34,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823051785] [2021-06-01 18:04:34,635 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:04:34,655 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-01 18:04:34,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:04:34,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-01 18:04:34,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:04:34,704 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:04:34,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823051785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:34,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:04:34,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-01 18:04:34,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810735869] [2021-06-01 18:04:34,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-01 18:04:34,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:04:34,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-01 18:04:34,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-01 18:04:34,706 INFO L87 Difference]: Start difference. First operand 104 states and 222 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:34,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:04:34,840 INFO L93 Difference]: Finished difference Result 147 states and 286 transitions. [2021-06-01 18:04:34,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-01 18:04:34,840 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-01 18:04:34,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:04:34,841 INFO L225 Difference]: With dead ends: 147 [2021-06-01 18:04:34,841 INFO L226 Difference]: Without dead ends: 147 [2021-06-01 18:04:34,841 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 87.5ms TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:04:34,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-06-01 18:04:34,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 103. [2021-06-01 18:04:34,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.127450980392157) internal successors, (217), 102 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:34,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 217 transitions. [2021-06-01 18:04:34,845 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 217 transitions. Word has length 17 [2021-06-01 18:04:34,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:04:34,845 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 217 transitions. [2021-06-01 18:04:34,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:34,845 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 217 transitions. [2021-06-01 18:04:34,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-01 18:04:34,846 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:04:34,846 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:04:35,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:04:35,053 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:04:35,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:04:35,053 INFO L82 PathProgramCache]: Analyzing trace with hash 397922780, now seen corresponding path program 6 times [2021-06-01 18:04:35,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:04:35,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416275945] [2021-06-01 18:04:35,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:04:35,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:04:35,082 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:04:35,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:04:35,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416275945] [2021-06-01 18:04:35,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416275945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:35,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747661249] [2021-06-01 18:04:35,082 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-01 18:04:35,103 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-01 18:04:35,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:04:35,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-01 18:04:35,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:04:35,161 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:04:35,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747661249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:35,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:04:35,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-01 18:04:35,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895339410] [2021-06-01 18:04:35,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-01 18:04:35,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:04:35,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-01 18:04:35,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-01 18:04:35,162 INFO L87 Difference]: Start difference. First operand 103 states and 217 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:35,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:04:35,242 INFO L93 Difference]: Finished difference Result 114 states and 233 transitions. [2021-06-01 18:04:35,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-01 18:04:35,242 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-01 18:04:35,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:04:35,243 INFO L225 Difference]: With dead ends: 114 [2021-06-01 18:04:35,243 INFO L226 Difference]: Without dead ends: 112 [2021-06-01 18:04:35,243 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 39.8ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-01 18:04:35,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-06-01 18:04:35,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 103. [2021-06-01 18:04:35,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.1176470588235294) internal successors, (216), 102 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:35,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 216 transitions. [2021-06-01 18:04:35,246 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 216 transitions. Word has length 17 [2021-06-01 18:04:35,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:04:35,246 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 216 transitions. [2021-06-01 18:04:35,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:35,246 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 216 transitions. [2021-06-01 18:04:35,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-01 18:04:35,247 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:04:35,247 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:04:35,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:04:35,448 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:04:35,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:04:35,448 INFO L82 PathProgramCache]: Analyzing trace with hash 613173682, now seen corresponding path program 7 times [2021-06-01 18:04:35,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:04:35,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162816547] [2021-06-01 18:04:35,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:04:35,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:04:35,478 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:04:35,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:04:35,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162816547] [2021-06-01 18:04:35,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162816547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:35,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641236531] [2021-06-01 18:04:35,478 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:04:35,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:04:35,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-01 18:04:35,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:04:35,560 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:04:35,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641236531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:35,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:04:35,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-01 18:04:35,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585619089] [2021-06-01 18:04:35,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-01 18:04:35,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:04:35,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-01 18:04:35,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-01 18:04:35,563 INFO L87 Difference]: Start difference. First operand 103 states and 216 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 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) [2021-06-01 18:04:35,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:04:35,695 INFO L93 Difference]: Finished difference Result 208 states and 409 transitions. [2021-06-01 18:04:35,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-01 18:04:35,696 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 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 17 [2021-06-01 18:04:35,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:04:35,697 INFO L225 Difference]: With dead ends: 208 [2021-06-01 18:04:35,697 INFO L226 Difference]: Without dead ends: 208 [2021-06-01 18:04:35,697 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 83.6ms TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:04:35,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-06-01 18:04:35,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 124. [2021-06-01 18:04:35,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.186991869918699) internal successors, (269), 123 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:35,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 269 transitions. [2021-06-01 18:04:35,704 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 269 transitions. Word has length 17 [2021-06-01 18:04:35,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:04:35,704 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 269 transitions. [2021-06-01 18:04:35,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 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) [2021-06-01 18:04:35,705 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 269 transitions. [2021-06-01 18:04:35,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-01 18:04:35,705 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:04:35,706 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:04:35,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:04:35,925 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:04:35,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:04:35,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1315978990, now seen corresponding path program 8 times [2021-06-01 18:04:35,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:04:35,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335678372] [2021-06-01 18:04:35,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:04:35,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:04:35,945 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:04:35,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:04:35,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335678372] [2021-06-01 18:04:35,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335678372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:35,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993160182] [2021-06-01 18:04:35,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:04:35,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:04:35,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:04:35,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-01 18:04:35,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:04:36,041 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:04:36,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993160182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:36,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:04:36,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-01 18:04:36,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460960766] [2021-06-01 18:04:36,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-01 18:04:36,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:04:36,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-01 18:04:36,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-01 18:04:36,042 INFO L87 Difference]: Start difference. First operand 124 states and 269 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:36,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:04:36,124 INFO L93 Difference]: Finished difference Result 145 states and 295 transitions. [2021-06-01 18:04:36,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-01 18:04:36,124 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-01 18:04:36,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:04:36,125 INFO L225 Difference]: With dead ends: 145 [2021-06-01 18:04:36,125 INFO L226 Difference]: Without dead ends: 142 [2021-06-01 18:04:36,125 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 44.1ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:04:36,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-06-01 18:04:36,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 121. [2021-06-01 18:04:36,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.191666666666667) internal successors, (263), 120 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:36,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 263 transitions. [2021-06-01 18:04:36,131 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 263 transitions. Word has length 17 [2021-06-01 18:04:36,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:04:36,131 INFO L482 AbstractCegarLoop]: Abstraction has 121 states and 263 transitions. [2021-06-01 18:04:36,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:36,131 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 263 transitions. [2021-06-01 18:04:36,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-01 18:04:36,133 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:04:36,133 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:04:36,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-06-01 18:04:36,350 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:04:36,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:04:36,350 INFO L82 PathProgramCache]: Analyzing trace with hash 51051130, now seen corresponding path program 9 times [2021-06-01 18:04:36,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:04:36,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141920204] [2021-06-01 18:04:36,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:04:36,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:04:36,372 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:04:36,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:04:36,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141920204] [2021-06-01 18:04:36,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141920204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:36,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001545111] [2021-06-01 18:04:36,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:04:36,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-01 18:04:36,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:04:36,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-01 18:04:36,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:04:36,453 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:04:36,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001545111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:36,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:04:36,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-01 18:04:36,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061046439] [2021-06-01 18:04:36,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-01 18:04:36,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:04:36,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-01 18:04:36,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-01 18:04:36,455 INFO L87 Difference]: Start difference. First operand 121 states and 263 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:36,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:04:36,619 INFO L93 Difference]: Finished difference Result 165 states and 338 transitions. [2021-06-01 18:04:36,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-01 18:04:36,619 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-01 18:04:36,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:04:36,620 INFO L225 Difference]: With dead ends: 165 [2021-06-01 18:04:36,620 INFO L226 Difference]: Without dead ends: 165 [2021-06-01 18:04:36,620 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 100.5ms TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:04:36,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-06-01 18:04:36,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 123. [2021-06-01 18:04:36,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 2.19672131147541) internal successors, (268), 122 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:36,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 268 transitions. [2021-06-01 18:04:36,623 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 268 transitions. Word has length 17 [2021-06-01 18:04:36,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:04:36,623 INFO L482 AbstractCegarLoop]: Abstraction has 123 states and 268 transitions. [2021-06-01 18:04:36,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:36,623 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 268 transitions. [2021-06-01 18:04:36,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-01 18:04:36,624 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:04:36,624 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:04:36,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:04:36,839 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:04:36,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:04:36,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1332846952, now seen corresponding path program 10 times [2021-06-01 18:04:36,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:04:36,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200246337] [2021-06-01 18:04:36,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:04:36,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:04:36,868 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:04:36,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:04:36,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200246337] [2021-06-01 18:04:36,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200246337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:36,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691011889] [2021-06-01 18:04:36,868 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:04:36,889 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:04:36,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:04:36,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-01 18:04:36,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:04:36,952 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:04:36,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691011889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:36,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:04:36,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-01 18:04:36,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991735399] [2021-06-01 18:04:36,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-01 18:04:36,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:04:36,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-01 18:04:36,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-01 18:04:36,954 INFO L87 Difference]: Start difference. First operand 123 states and 268 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:37,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:04:37,064 INFO L93 Difference]: Finished difference Result 199 states and 385 transitions. [2021-06-01 18:04:37,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:04:37,064 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-01 18:04:37,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:04:37,065 INFO L225 Difference]: With dead ends: 199 [2021-06-01 18:04:37,065 INFO L226 Difference]: Without dead ends: 197 [2021-06-01 18:04:37,066 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 69.7ms TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:04:37,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-06-01 18:04:37,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 125. [2021-06-01 18:04:37,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.1774193548387095) internal successors, (270), 124 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:37,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 270 transitions. [2021-06-01 18:04:37,070 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 270 transitions. Word has length 17 [2021-06-01 18:04:37,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:04:37,070 INFO L482 AbstractCegarLoop]: Abstraction has 125 states and 270 transitions. [2021-06-01 18:04:37,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:37,071 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 270 transitions. [2021-06-01 18:04:37,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-01 18:04:37,071 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:04:37,071 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:04:37,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:04:37,285 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:04:37,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:04:37,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1145142718, now seen corresponding path program 11 times [2021-06-01 18:04:37,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:04:37,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405876549] [2021-06-01 18:04:37,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:04:37,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:04:37,315 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:04:37,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:04:37,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405876549] [2021-06-01 18:04:37,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405876549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:37,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039584477] [2021-06-01 18:04:37,316 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:04:37,343 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-01 18:04:37,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:04:37,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-01 18:04:37,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:04:37,413 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:04:37,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039584477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:37,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:04:37,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-01 18:04:37,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530407727] [2021-06-01 18:04:37,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-01 18:04:37,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:04:37,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-01 18:04:37,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-01 18:04:37,415 INFO L87 Difference]: Start difference. First operand 125 states and 270 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:37,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:04:37,622 INFO L93 Difference]: Finished difference Result 174 states and 367 transitions. [2021-06-01 18:04:37,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-01 18:04:37,623 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-01 18:04:37,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:04:37,623 INFO L225 Difference]: With dead ends: 174 [2021-06-01 18:04:37,623 INFO L226 Difference]: Without dead ends: 174 [2021-06-01 18:04:37,624 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 137.6ms TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2021-06-01 18:04:37,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-06-01 18:04:37,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 131. [2021-06-01 18:04:37,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 2.1769230769230767) internal successors, (283), 130 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:37,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 283 transitions. [2021-06-01 18:04:37,627 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 283 transitions. Word has length 17 [2021-06-01 18:04:37,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:04:37,627 INFO L482 AbstractCegarLoop]: Abstraction has 131 states and 283 transitions. [2021-06-01 18:04:37,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:37,627 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 283 transitions. [2021-06-01 18:04:37,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-01 18:04:37,627 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:04:37,627 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:04:37,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-01 18:04:37,838 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:04:37,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:04:37,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1839193218, now seen corresponding path program 12 times [2021-06-01 18:04:37,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:04:37,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881492178] [2021-06-01 18:04:37,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:04:37,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:04:37,860 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:04:37,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:04:37,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881492178] [2021-06-01 18:04:37,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881492178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:37,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958284027] [2021-06-01 18:04:37,860 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:04:37,889 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-01 18:04:37,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:04:37,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-01 18:04:37,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:04:37,931 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:04:37,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958284027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:37,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:04:37,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-01 18:04:37,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915592756] [2021-06-01 18:04:37,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-01 18:04:37,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:04:37,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-01 18:04:37,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-01 18:04:37,932 INFO L87 Difference]: Start difference. First operand 131 states and 283 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:38,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:04:38,061 INFO L93 Difference]: Finished difference Result 205 states and 395 transitions. [2021-06-01 18:04:38,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-01 18:04:38,061 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-01 18:04:38,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:04:38,063 INFO L225 Difference]: With dead ends: 205 [2021-06-01 18:04:38,063 INFO L226 Difference]: Without dead ends: 199 [2021-06-01 18:04:38,063 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 67.5ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-01 18:04:38,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-06-01 18:04:38,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 135. [2021-06-01 18:04:38,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.1417910447761193) internal successors, (287), 134 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:38,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 287 transitions. [2021-06-01 18:04:38,067 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 287 transitions. Word has length 17 [2021-06-01 18:04:38,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:04:38,067 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 287 transitions. [2021-06-01 18:04:38,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:38,067 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 287 transitions. [2021-06-01 18:04:38,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:04:38,069 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:04:38,069 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:04:38,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-01 18:04:38,287 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:04:38,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:04:38,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1030417008, now seen corresponding path program 13 times [2021-06-01 18:04:38,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:04:38,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940365949] [2021-06-01 18:04:38,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:04:38,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:04:38,321 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:04:38,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:04:38,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940365949] [2021-06-01 18:04:38,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940365949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:38,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304726678] [2021-06-01 18:04:38,321 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:04:38,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:04:38,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-01 18:04:38,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:04:38,435 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:04:38,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304726678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:38,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:04:38,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 6 [2021-06-01 18:04:38,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225846831] [2021-06-01 18:04:38,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:04:38,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:04:38,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:04:38,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:04:38,436 INFO L87 Difference]: Start difference. First operand 135 states and 287 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:38,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:04:38,507 INFO L93 Difference]: Finished difference Result 224 states and 457 transitions. [2021-06-01 18:04:38,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:04:38,507 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 [2021-06-01 18:04:38,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:04:38,508 INFO L225 Difference]: With dead ends: 224 [2021-06-01 18:04:38,508 INFO L226 Difference]: Without dead ends: 217 [2021-06-01 18:04:38,508 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 39.6ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:04:38,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-06-01 18:04:38,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 175. [2021-06-01 18:04:38,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.1954022988505746) internal successors, (382), 174 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:38,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 382 transitions. [2021-06-01 18:04:38,511 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 382 transitions. Word has length 19 [2021-06-01 18:04:38,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:04:38,512 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 382 transitions. [2021-06-01 18:04:38,512 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:38,512 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 382 transitions. [2021-06-01 18:04:38,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:04:38,512 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:04:38,512 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:04:38,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-01 18:04:38,729 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:04:38,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:04:38,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1048749968, now seen corresponding path program 14 times [2021-06-01 18:04:38,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:04:38,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125190539] [2021-06-01 18:04:38,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:04:38,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:04:38,764 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-01 18:04:38,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:04:38,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125190539] [2021-06-01 18:04:38,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125190539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:38,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900792638] [2021-06-01 18:04:38,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-01 18:04:38,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:04:38,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:04:38,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-01 18:04:38,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:04:38,930 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:04:38,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900792638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:38,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:04:38,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 7 [2021-06-01 18:04:38,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948187669] [2021-06-01 18:04:38,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-01 18:04:38,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:04:38,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-01 18:04:38,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-01 18:04:38,933 INFO L87 Difference]: Start difference. First operand 175 states and 382 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 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) [2021-06-01 18:04:39,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:04:39,023 INFO L93 Difference]: Finished difference Result 276 states and 576 transitions. [2021-06-01 18:04:39,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-01 18:04:39,024 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-01 18:04:39,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:04:39,025 INFO L225 Difference]: With dead ends: 276 [2021-06-01 18:04:39,025 INFO L226 Difference]: Without dead ends: 262 [2021-06-01 18:04:39,025 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 55.8ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-01 18:04:39,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-06-01 18:04:39,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 193. [2021-06-01 18:04:39,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.2552083333333335) internal successors, (433), 192 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:39,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 433 transitions. [2021-06-01 18:04:39,030 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 433 transitions. Word has length 19 [2021-06-01 18:04:39,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:04:39,030 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 433 transitions. [2021-06-01 18:04:39,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 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) [2021-06-01 18:04:39,030 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 433 transitions. [2021-06-01 18:04:39,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 18:04:39,031 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:04:39,031 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:04:39,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:04:39,241 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:04:39,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:04:39,241 INFO L82 PathProgramCache]: Analyzing trace with hash -588981648, now seen corresponding path program 15 times [2021-06-01 18:04:39,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:04:39,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443613648] [2021-06-01 18:04:39,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:04:39,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:04:39,273 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-01 18:04:39,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:04:39,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443613648] [2021-06-01 18:04:39,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443613648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:39,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388623460] [2021-06-01 18:04:39,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:04:39,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-01 18:04:39,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:04:39,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-01 18:04:39,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:04:39,461 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:04:39,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388623460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:39,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:04:39,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 6 [2021-06-01 18:04:39,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357649105] [2021-06-01 18:04:39,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 18:04:39,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:04:39,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 18:04:39,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:04:39,463 INFO L87 Difference]: Start difference. First operand 193 states and 433 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:39,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:04:39,545 INFO L93 Difference]: Finished difference Result 276 states and 592 transitions. [2021-06-01 18:04:39,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 18:04:39,545 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 [2021-06-01 18:04:39,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:04:39,546 INFO L225 Difference]: With dead ends: 276 [2021-06-01 18:04:39,546 INFO L226 Difference]: Without dead ends: 269 [2021-06-01 18:04:39,546 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 47.5ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-01 18:04:39,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-06-01 18:04:39,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 223. [2021-06-01 18:04:39,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.279279279279279) internal successors, (506), 222 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:39,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 506 transitions. [2021-06-01 18:04:39,552 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 506 transitions. Word has length 19 [2021-06-01 18:04:39,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:04:39,552 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 506 transitions. [2021-06-01 18:04:39,552 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:39,552 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 506 transitions. [2021-06-01 18:04:39,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-01 18:04:39,553 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:04:39,553 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:04:39,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:04:39,769 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:04:39,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:04:39,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1461933170, now seen corresponding path program 16 times [2021-06-01 18:04:39,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:04:39,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784116430] [2021-06-01 18:04:39,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:04:39,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:04:39,802 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:04:39,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:04:39,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784116430] [2021-06-01 18:04:39,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784116430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:39,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356467308] [2021-06-01 18:04:39,802 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-01 18:04:39,819 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:04:39,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:04:39,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-01 18:04:39,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:04:39,909 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:04:39,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356467308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:39,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:04:39,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-01 18:04:39,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633264081] [2021-06-01 18:04:39,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-01 18:04:39,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:04:39,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-01 18:04:39,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:04:39,910 INFO L87 Difference]: Start difference. First operand 223 states and 506 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 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) [2021-06-01 18:04:40,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:04:40,641 INFO L93 Difference]: Finished difference Result 437 states and 898 transitions. [2021-06-01 18:04:40,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-01 18:04:40,642 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 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 21 [2021-06-01 18:04:40,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:04:40,643 INFO L225 Difference]: With dead ends: 437 [2021-06-01 18:04:40,643 INFO L226 Difference]: Without dead ends: 437 [2021-06-01 18:04:40,644 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 450.1ms TimeCoverageRelationStatistics Valid=406, Invalid=1400, Unknown=0, NotChecked=0, Total=1806 [2021-06-01 18:04:40,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2021-06-01 18:04:40,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 183. [2021-06-01 18:04:40,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.2527472527472527) internal successors, (410), 182 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:40,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 410 transitions. [2021-06-01 18:04:40,648 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 410 transitions. Word has length 21 [2021-06-01 18:04:40,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:04:40,648 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 410 transitions. [2021-06-01 18:04:40,648 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 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) [2021-06-01 18:04:40,648 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 410 transitions. [2021-06-01 18:04:40,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-01 18:04:40,649 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:04:40,649 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:04:40,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:04:40,867 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:04:40,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:04:40,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1465011118, now seen corresponding path program 17 times [2021-06-01 18:04:40,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:04:40,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417012767] [2021-06-01 18:04:40,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:04:40,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:04:40,899 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:04:40,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:04:40,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417012767] [2021-06-01 18:04:40,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417012767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:40,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671164936] [2021-06-01 18:04:40,900 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-01 18:04:40,930 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-01 18:04:40,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:04:40,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-01 18:04:40,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:04:40,990 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:04:40,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671164936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:40,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:04:40,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-01 18:04:40,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430232534] [2021-06-01 18:04:40,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-01 18:04:40,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:04:40,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-01 18:04:40,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:04:40,991 INFO L87 Difference]: Start difference. First operand 183 states and 410 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 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) [2021-06-01 18:04:41,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:04:41,313 INFO L93 Difference]: Finished difference Result 414 states and 782 transitions. [2021-06-01 18:04:41,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-01 18:04:41,313 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 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 21 [2021-06-01 18:04:41,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:04:41,314 INFO L225 Difference]: With dead ends: 414 [2021-06-01 18:04:41,314 INFO L226 Difference]: Without dead ends: 382 [2021-06-01 18:04:41,315 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 244.0ms TimeCoverageRelationStatistics Valid=210, Invalid=846, Unknown=0, NotChecked=0, Total=1056 [2021-06-01 18:04:41,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-06-01 18:04:41,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 221. [2021-06-01 18:04:41,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.2409090909090907) internal successors, (493), 220 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:41,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 493 transitions. [2021-06-01 18:04:41,319 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 493 transitions. Word has length 21 [2021-06-01 18:04:41,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:04:41,319 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 493 transitions. [2021-06-01 18:04:41,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 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) [2021-06-01 18:04:41,320 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 493 transitions. [2021-06-01 18:04:41,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-01 18:04:41,320 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:04:41,320 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:04:41,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-01 18:04:41,533 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:04:41,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:04:41,533 INFO L82 PathProgramCache]: Analyzing trace with hash 2128550594, now seen corresponding path program 18 times [2021-06-01 18:04:41,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:04:41,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249380234] [2021-06-01 18:04:41,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:04:41,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:04:41,569 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:04:41,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:04:41,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249380234] [2021-06-01 18:04:41,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249380234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:41,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608015865] [2021-06-01 18:04:41,570 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:04:41,603 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-01 18:04:41,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:04:41,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-01 18:04:41,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:04:41,678 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:04:41,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608015865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:41,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:04:41,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-06-01 18:04:41,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082806885] [2021-06-01 18:04:41,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-01 18:04:41,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:04:41,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-01 18:04:41,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-01 18:04:41,679 INFO L87 Difference]: Start difference. First operand 221 states and 493 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:41,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:04:41,958 INFO L93 Difference]: Finished difference Result 371 states and 719 transitions. [2021-06-01 18:04:41,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-01 18:04:41,958 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-01 18:04:41,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:04:41,960 INFO L225 Difference]: With dead ends: 371 [2021-06-01 18:04:41,960 INFO L226 Difference]: Without dead ends: 371 [2021-06-01 18:04:41,960 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 185.9ms TimeCoverageRelationStatistics Valid=173, Invalid=583, Unknown=0, NotChecked=0, Total=756 [2021-06-01 18:04:41,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-06-01 18:04:41,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 218. [2021-06-01 18:04:41,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.225806451612903) internal successors, (483), 217 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:41,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 483 transitions. [2021-06-01 18:04:41,967 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 483 transitions. Word has length 21 [2021-06-01 18:04:41,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:04:41,967 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 483 transitions. [2021-06-01 18:04:41,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:41,967 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 483 transitions. [2021-06-01 18:04:41,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-01 18:04:41,967 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:04:41,967 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:04:42,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-01 18:04:42,183 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:04:42,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:04:42,183 INFO L82 PathProgramCache]: Analyzing trace with hash 744652512, now seen corresponding path program 19 times [2021-06-01 18:04:42,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:04:42,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312190789] [2021-06-01 18:04:42,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:04:42,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:04:42,207 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:04:42,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:04:42,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312190789] [2021-06-01 18:04:42,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312190789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:42,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095238741] [2021-06-01 18:04:42,207 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:04:42,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:04:42,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-01 18:04:42,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:04:42,304 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:04:42,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095238741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:42,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:04:42,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-06-01 18:04:42,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589477659] [2021-06-01 18:04:42,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-01 18:04:42,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:04:42,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-01 18:04:42,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-01 18:04:42,305 INFO L87 Difference]: Start difference. First operand 218 states and 483 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:42,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:04:42,407 INFO L93 Difference]: Finished difference Result 238 states and 514 transitions. [2021-06-01 18:04:42,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:04:42,407 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-01 18:04:42,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:04:42,408 INFO L225 Difference]: With dead ends: 238 [2021-06-01 18:04:42,408 INFO L226 Difference]: Without dead ends: 236 [2021-06-01 18:04:42,409 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 50.1ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:04:42,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-06-01 18:04:42,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 218. [2021-06-01 18:04:42,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.2211981566820276) internal successors, (482), 217 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:42,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 482 transitions. [2021-06-01 18:04:42,413 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 482 transitions. Word has length 21 [2021-06-01 18:04:42,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:04:42,413 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 482 transitions. [2021-06-01 18:04:42,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:42,413 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 482 transitions. [2021-06-01 18:04:42,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-01 18:04:42,413 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:04:42,413 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:04:42,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-01 18:04:42,629 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:04:42,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:04:42,629 INFO L82 PathProgramCache]: Analyzing trace with hash -157465486, now seen corresponding path program 20 times [2021-06-01 18:04:42,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:04:42,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662692979] [2021-06-01 18:04:42,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:04:42,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:04:42,653 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:04:42,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:04:42,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662692979] [2021-06-01 18:04:42,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662692979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:42,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370711161] [2021-06-01 18:04:42,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-01 18:04:42,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:04:42,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:04:42,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-01 18:04:42,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:04:42,742 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:04:42,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370711161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:42,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:04:42,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-01 18:04:42,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397824231] [2021-06-01 18:04:42,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-01 18:04:42,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:04:42,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-01 18:04:42,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:04:42,743 INFO L87 Difference]: Start difference. First operand 218 states and 482 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:43,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:04:43,021 INFO L93 Difference]: Finished difference Result 631 states and 1240 transitions. [2021-06-01 18:04:43,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-01 18:04:43,022 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-01 18:04:43,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:04:43,023 INFO L225 Difference]: With dead ends: 631 [2021-06-01 18:04:43,023 INFO L226 Difference]: Without dead ends: 631 [2021-06-01 18:04:43,024 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 176.4ms TimeCoverageRelationStatistics Valid=153, Invalid=549, Unknown=0, NotChecked=0, Total=702 [2021-06-01 18:04:43,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-06-01 18:04:43,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 263. [2021-06-01 18:04:43,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.267175572519084) internal successors, (594), 262 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:43,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 594 transitions. [2021-06-01 18:04:43,029 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 594 transitions. Word has length 21 [2021-06-01 18:04:43,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:04:43,030 INFO L482 AbstractCegarLoop]: Abstraction has 263 states and 594 transitions. [2021-06-01 18:04:43,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:43,030 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 594 transitions. [2021-06-01 18:04:43,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-01 18:04:43,030 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:04:43,030 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:04:43,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-01 18:04:43,231 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:04:43,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:04:43,231 INFO L82 PathProgramCache]: Analyzing trace with hash 545339822, now seen corresponding path program 21 times [2021-06-01 18:04:43,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:04:43,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723394079] [2021-06-01 18:04:43,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:04:43,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:04:43,253 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:04:43,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:04:43,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723394079] [2021-06-01 18:04:43,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723394079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:43,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839630655] [2021-06-01 18:04:43,253 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 [2021-06-01 18:04:43,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-01 18:04:43,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:04:43,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-01 18:04:43,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:04:43,351 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:04:43,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839630655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:43,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:04:43,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-01 18:04:43,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702163551] [2021-06-01 18:04:43,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-01 18:04:43,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:04:43,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-01 18:04:43,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:04:43,352 INFO L87 Difference]: Start difference. First operand 263 states and 594 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:43,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:04:43,602 INFO L93 Difference]: Finished difference Result 429 states and 858 transitions. [2021-06-01 18:04:43,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-01 18:04:43,603 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-01 18:04:43,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:04:43,604 INFO L225 Difference]: With dead ends: 429 [2021-06-01 18:04:43,604 INFO L226 Difference]: Without dead ends: 423 [2021-06-01 18:04:43,604 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 142.8ms TimeCoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2021-06-01 18:04:43,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-06-01 18:04:43,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 263. [2021-06-01 18:04:43,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.263358778625954) internal successors, (593), 262 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:43,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 593 transitions. [2021-06-01 18:04:43,609 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 593 transitions. Word has length 21 [2021-06-01 18:04:43,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:04:43,610 INFO L482 AbstractCegarLoop]: Abstraction has 263 states and 593 transitions. [2021-06-01 18:04:43,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:43,610 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 593 transitions. [2021-06-01 18:04:43,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-01 18:04:43,610 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:04:43,610 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:04:43,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-01 18:04:43,826 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:04:43,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:04:43,826 INFO L82 PathProgramCache]: Analyzing trace with hash -719588038, now seen corresponding path program 22 times [2021-06-01 18:04:43,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:04:43,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172561426] [2021-06-01 18:04:43,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:04:43,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:04:43,847 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-01 18:04:43,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:04:43,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172561426] [2021-06-01 18:04:43,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172561426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:43,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798436316] [2021-06-01 18:04:43,848 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:04:43,870 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:04:43,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:04:43,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-01 18:04:43,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:04:43,939 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:04:43,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798436316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:43,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:04:43,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-01 18:04:43,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779073839] [2021-06-01 18:04:43,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-01 18:04:43,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:04:43,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-01 18:04:43,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:04:43,941 INFO L87 Difference]: Start difference. First operand 263 states and 593 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:44,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:04:44,283 INFO L93 Difference]: Finished difference Result 520 states and 1042 transitions. [2021-06-01 18:04:44,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-01 18:04:44,284 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-01 18:04:44,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:04:44,286 INFO L225 Difference]: With dead ends: 520 [2021-06-01 18:04:44,286 INFO L226 Difference]: Without dead ends: 520 [2021-06-01 18:04:44,286 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 195.5ms TimeCoverageRelationStatistics Valid=182, Invalid=630, Unknown=0, NotChecked=0, Total=812 [2021-06-01 18:04:44,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-06-01 18:04:44,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 264. [2021-06-01 18:04:44,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.2623574144486693) internal successors, (595), 263 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:44,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 595 transitions. [2021-06-01 18:04:44,293 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 595 transitions. Word has length 21 [2021-06-01 18:04:44,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:04:44,293 INFO L482 AbstractCegarLoop]: Abstraction has 264 states and 595 transitions. [2021-06-01 18:04:44,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:44,300 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 595 transitions. [2021-06-01 18:04:44,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-01 18:04:44,301 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:04:44,301 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:04:44,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:04:44,516 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:04:44,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:04:44,517 INFO L82 PathProgramCache]: Analyzing trace with hash -2103486120, now seen corresponding path program 23 times [2021-06-01 18:04:44,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:04:44,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742813569] [2021-06-01 18:04:44,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:04:44,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:04:44,550 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-01 18:04:44,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:04:44,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742813569] [2021-06-01 18:04:44,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742813569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:44,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552311880] [2021-06-01 18:04:44,551 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:04:44,569 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-01 18:04:44,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:04:44,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-01 18:04:44,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:04:44,646 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:04:44,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552311880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:44,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:04:44,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-01 18:04:44,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47150472] [2021-06-01 18:04:44,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-01 18:04:44,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:04:44,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-01 18:04:44,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:04:44,647 INFO L87 Difference]: Start difference. First operand 264 states and 595 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:44,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:04:44,854 INFO L93 Difference]: Finished difference Result 475 states and 944 transitions. [2021-06-01 18:04:44,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-01 18:04:44,857 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-01 18:04:44,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:04:44,858 INFO L225 Difference]: With dead ends: 475 [2021-06-01 18:04:44,858 INFO L226 Difference]: Without dead ends: 471 [2021-06-01 18:04:44,858 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 131.3ms TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2021-06-01 18:04:44,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-06-01 18:04:44,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 266. [2021-06-01 18:04:44,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 2.2528301886792454) internal successors, (597), 265 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:44,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 597 transitions. [2021-06-01 18:04:44,863 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 597 transitions. Word has length 21 [2021-06-01 18:04:44,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:04:44,863 INFO L482 AbstractCegarLoop]: Abstraction has 266 states and 597 transitions. [2021-06-01 18:04:44,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:44,863 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 597 transitions. [2021-06-01 18:04:44,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-01 18:04:44,864 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:04:44,864 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:04:45,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-01 18:04:45,077 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:04:45,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:04:45,077 INFO L82 PathProgramCache]: Analyzing trace with hash 374503550, now seen corresponding path program 24 times [2021-06-01 18:04:45,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:04:45,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324877721] [2021-06-01 18:04:45,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:04:45,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:04:45,108 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:04:45,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:04:45,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324877721] [2021-06-01 18:04:45,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324877721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:45,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794145197] [2021-06-01 18:04:45,108 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-01 18:04:45,136 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-01 18:04:45,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:04:45,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-01 18:04:45,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:04:45,210 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:04:45,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794145197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:45,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:04:45,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-01 18:04:45,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517911349] [2021-06-01 18:04:45,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-01 18:04:45,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:04:45,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-01 18:04:45,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:04:45,211 INFO L87 Difference]: Start difference. First operand 266 states and 597 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:45,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:04:45,596 INFO L93 Difference]: Finished difference Result 451 states and 913 transitions. [2021-06-01 18:04:45,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-01 18:04:45,596 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-01 18:04:45,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:04:45,597 INFO L225 Difference]: With dead ends: 451 [2021-06-01 18:04:45,597 INFO L226 Difference]: Without dead ends: 451 [2021-06-01 18:04:45,598 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 242.2ms TimeCoverageRelationStatistics Valid=221, Invalid=835, Unknown=0, NotChecked=0, Total=1056 [2021-06-01 18:04:45,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-06-01 18:04:45,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 250. [2021-06-01 18:04:45,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.216867469879518) internal successors, (552), 249 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:45,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 552 transitions. [2021-06-01 18:04:45,602 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 552 transitions. Word has length 21 [2021-06-01 18:04:45,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:04:45,602 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 552 transitions. [2021-06-01 18:04:45,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:45,602 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 552 transitions. [2021-06-01 18:04:45,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-01 18:04:45,602 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:04:45,602 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:04:45,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:04:45,813 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:04:45,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:04:45,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1685134910, now seen corresponding path program 25 times [2021-06-01 18:04:45,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:04:45,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723850196] [2021-06-01 18:04:45,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:04:45,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:04:45,846 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:04:45,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:04:45,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723850196] [2021-06-01 18:04:45,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723850196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:45,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642987936] [2021-06-01 18:04:45,846 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:04:45,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:04:45,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-01 18:04:45,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:04:45,949 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:04:45,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642987936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:45,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:04:45,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-01 18:04:45,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972233501] [2021-06-01 18:04:45,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-01 18:04:45,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:04:45,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-01 18:04:45,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:04:45,950 INFO L87 Difference]: Start difference. First operand 250 states and 552 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:46,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:04:46,221 INFO L93 Difference]: Finished difference Result 408 states and 804 transitions. [2021-06-01 18:04:46,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-01 18:04:46,221 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-01 18:04:46,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:04:46,223 INFO L225 Difference]: With dead ends: 408 [2021-06-01 18:04:46,223 INFO L226 Difference]: Without dead ends: 402 [2021-06-01 18:04:46,223 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 166.2ms TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2021-06-01 18:04:46,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-06-01 18:04:46,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 254. [2021-06-01 18:04:46,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 2.205533596837945) internal successors, (558), 253 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:46,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 558 transitions. [2021-06-01 18:04:46,227 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 558 transitions. Word has length 21 [2021-06-01 18:04:46,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:04:46,227 INFO L482 AbstractCegarLoop]: Abstraction has 254 states and 558 transitions. [2021-06-01 18:04:46,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:46,227 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 558 transitions. [2021-06-01 18:04:46,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-01 18:04:46,227 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:04:46,227 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:04:46,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-01 18:04:46,443 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:04:46,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:04:46,443 INFO L82 PathProgramCache]: Analyzing trace with hash 19311986, now seen corresponding path program 26 times [2021-06-01 18:04:46,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:04:46,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551806904] [2021-06-01 18:04:46,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:04:46,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:04:46,474 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:04:46,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:04:46,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551806904] [2021-06-01 18:04:46,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551806904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:46,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406567508] [2021-06-01 18:04:46,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-01 18:04:46,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:04:46,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:04:46,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-01 18:04:46,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:04:46,585 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:04:46,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406567508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:46,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:04:46,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-01 18:04:46,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146058575] [2021-06-01 18:04:46,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-01 18:04:46,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:04:46,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-01 18:04:46,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:04:46,586 INFO L87 Difference]: Start difference. First operand 254 states and 558 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:46,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:04:46,933 INFO L93 Difference]: Finished difference Result 462 states and 931 transitions. [2021-06-01 18:04:46,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-01 18:04:46,933 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-01 18:04:46,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:04:46,934 INFO L225 Difference]: With dead ends: 462 [2021-06-01 18:04:46,935 INFO L226 Difference]: Without dead ends: 462 [2021-06-01 18:04:46,935 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 245.7ms TimeCoverageRelationStatistics Valid=221, Invalid=835, Unknown=0, NotChecked=0, Total=1056 [2021-06-01 18:04:46,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-06-01 18:04:46,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 243. [2021-06-01 18:04:46,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.1735537190082646) internal successors, (526), 242 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:46,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 526 transitions. [2021-06-01 18:04:46,939 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 526 transitions. Word has length 21 [2021-06-01 18:04:46,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:04:46,939 INFO L482 AbstractCegarLoop]: Abstraction has 243 states and 526 transitions. [2021-06-01 18:04:46,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:46,939 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 526 transitions. [2021-06-01 18:04:46,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-01 18:04:46,940 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:04:46,940 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:04:47,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:04:47,149 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:04:47,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:04:47,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1105347502, now seen corresponding path program 27 times [2021-06-01 18:04:47,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:04:47,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484910877] [2021-06-01 18:04:47,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:04:47,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:04:47,175 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:04:47,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:04:47,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484910877] [2021-06-01 18:04:47,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484910877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:47,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718958876] [2021-06-01 18:04:47,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-01 18:04:47,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-01 18:04:47,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:04:47,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-01 18:04:47,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:04:47,263 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:04:47,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718958876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:47,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:04:47,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-01 18:04:47,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333096983] [2021-06-01 18:04:47,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-01 18:04:47,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:04:47,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-01 18:04:47,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:04:47,264 INFO L87 Difference]: Start difference. First operand 243 states and 526 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 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) [2021-06-01 18:04:47,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:04:47,476 INFO L93 Difference]: Finished difference Result 331 states and 646 transitions. [2021-06-01 18:04:47,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-01 18:04:47,476 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 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 21 [2021-06-01 18:04:47,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:04:47,477 INFO L225 Difference]: With dead ends: 331 [2021-06-01 18:04:47,477 INFO L226 Difference]: Without dead ends: 322 [2021-06-01 18:04:47,478 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 146.6ms TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2021-06-01 18:04:47,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-06-01 18:04:47,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 228. [2021-06-01 18:04:47,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.185022026431718) internal successors, (496), 227 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:47,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 496 transitions. [2021-06-01 18:04:47,481 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 496 transitions. Word has length 21 [2021-06-01 18:04:47,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:04:47,481 INFO L482 AbstractCegarLoop]: Abstraction has 228 states and 496 transitions. [2021-06-01 18:04:47,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 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) [2021-06-01 18:04:47,481 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 496 transitions. [2021-06-01 18:04:47,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-01 18:04:47,482 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:04:47,482 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:04:47,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-01 18:04:47,697 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:04:47,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:04:47,697 INFO L82 PathProgramCache]: Analyzing trace with hash -701741454, now seen corresponding path program 28 times [2021-06-01 18:04:47,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:04:47,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288658030] [2021-06-01 18:04:47,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:04:47,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:04:47,720 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:04:47,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:04:47,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288658030] [2021-06-01 18:04:47,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288658030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:47,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826114040] [2021-06-01 18:04:47,720 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:04:47,745 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:04:47,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:04:47,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-01 18:04:47,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:04:47,811 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:04:47,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826114040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:47,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:04:47,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-06-01 18:04:47,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595885850] [2021-06-01 18:04:47,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-01 18:04:47,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:04:47,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-01 18:04:47,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-01 18:04:47,812 INFO L87 Difference]: Start difference. First operand 228 states and 496 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:48,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:04:48,065 INFO L93 Difference]: Finished difference Result 389 states and 758 transitions. [2021-06-01 18:04:48,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-01 18:04:48,066 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-01 18:04:48,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:04:48,067 INFO L225 Difference]: With dead ends: 389 [2021-06-01 18:04:48,067 INFO L226 Difference]: Without dead ends: 389 [2021-06-01 18:04:48,067 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 183.6ms TimeCoverageRelationStatistics Valid=173, Invalid=583, Unknown=0, NotChecked=0, Total=756 [2021-06-01 18:04:48,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-06-01 18:04:48,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 228. [2021-06-01 18:04:48,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.1806167400881056) internal successors, (495), 227 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:48,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 495 transitions. [2021-06-01 18:04:48,071 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 495 transitions. Word has length 21 [2021-06-01 18:04:48,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:04:48,071 INFO L482 AbstractCegarLoop]: Abstraction has 228 states and 495 transitions. [2021-06-01 18:04:48,071 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:48,071 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 495 transitions. [2021-06-01 18:04:48,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-01 18:04:48,071 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:04:48,071 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:04:48,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:04:48,285 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:04:48,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:04:48,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1063854, now seen corresponding path program 29 times [2021-06-01 18:04:48,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:04:48,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075262112] [2021-06-01 18:04:48,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:04:48,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:04:48,306 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:04:48,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:04:48,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075262112] [2021-06-01 18:04:48,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075262112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:48,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634586445] [2021-06-01 18:04:48,307 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-01 18:04:48,330 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-01 18:04:48,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:04:48,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-01 18:04:48,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:04:48,398 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:04:48,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634586445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:48,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:04:48,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-06-01 18:04:48,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338776848] [2021-06-01 18:04:48,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-01 18:04:48,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:04:48,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-01 18:04:48,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-01 18:04:48,399 INFO L87 Difference]: Start difference. First operand 228 states and 495 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:48,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:04:48,556 INFO L93 Difference]: Finished difference Result 278 states and 563 transitions. [2021-06-01 18:04:48,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-01 18:04:48,556 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-01 18:04:48,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:04:48,557 INFO L225 Difference]: With dead ends: 278 [2021-06-01 18:04:48,557 INFO L226 Difference]: Without dead ends: 275 [2021-06-01 18:04:48,557 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 107.3ms TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-06-01 18:04:48,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-06-01 18:04:48,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 225. [2021-06-01 18:04:48,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.1830357142857144) internal successors, (489), 224 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:48,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 489 transitions. [2021-06-01 18:04:48,560 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 489 transitions. Word has length 21 [2021-06-01 18:04:48,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:04:48,560 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 489 transitions. [2021-06-01 18:04:48,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:48,560 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 489 transitions. [2021-06-01 18:04:48,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-01 18:04:48,561 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:04:48,561 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:04:48,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-01 18:04:48,761 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:04:48,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:04:48,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1263864006, now seen corresponding path program 30 times [2021-06-01 18:04:48,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:04:48,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403270346] [2021-06-01 18:04:48,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:04:48,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:04:48,783 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:04:48,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:04:48,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403270346] [2021-06-01 18:04:48,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403270346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:48,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406141858] [2021-06-01 18:04:48,784 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-01 18:04:48,804 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-01 18:04:48,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:04:48,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-01 18:04:48,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:04:48,858 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:04:48,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406141858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:48,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:04:48,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-06-01 18:04:48,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788539174] [2021-06-01 18:04:48,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-01 18:04:48,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:04:48,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-01 18:04:48,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-01 18:04:48,859 INFO L87 Difference]: Start difference. First operand 225 states and 489 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:49,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:04:49,117 INFO L93 Difference]: Finished difference Result 315 states and 641 transitions. [2021-06-01 18:04:49,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-01 18:04:49,117 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-01 18:04:49,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:04:49,118 INFO L225 Difference]: With dead ends: 315 [2021-06-01 18:04:49,118 INFO L226 Difference]: Without dead ends: 315 [2021-06-01 18:04:49,118 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 163.0ms TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2021-06-01 18:04:49,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-06-01 18:04:49,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 226. [2021-06-01 18:04:49,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.1822222222222223) internal successors, (491), 225 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:49,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 491 transitions. [2021-06-01 18:04:49,122 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 491 transitions. Word has length 21 [2021-06-01 18:04:49,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:04:49,122 INFO L482 AbstractCegarLoop]: Abstraction has 226 states and 491 transitions. [2021-06-01 18:04:49,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:49,122 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 491 transitions. [2021-06-01 18:04:49,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-01 18:04:49,122 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:04:49,122 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:04:49,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:04:49,337 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:04:49,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:04:49,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1647205208, now seen corresponding path program 31 times [2021-06-01 18:04:49,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:04:49,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701180776] [2021-06-01 18:04:49,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:04:49,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:04:49,357 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:04:49,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:04:49,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701180776] [2021-06-01 18:04:49,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701180776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:49,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39392155] [2021-06-01 18:04:49,358 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:04:49,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:04:49,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-01 18:04:49,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:04:49,437 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:04:49,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39392155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:49,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:04:49,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-06-01 18:04:49,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130960472] [2021-06-01 18:04:49,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-01 18:04:49,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:04:49,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-01 18:04:49,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-01 18:04:49,438 INFO L87 Difference]: Start difference. First operand 226 states and 491 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:49,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:04:49,626 INFO L93 Difference]: Finished difference Result 367 states and 714 transitions. [2021-06-01 18:04:49,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-01 18:04:49,626 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-01 18:04:49,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:04:49,627 INFO L225 Difference]: With dead ends: 367 [2021-06-01 18:04:49,627 INFO L226 Difference]: Without dead ends: 365 [2021-06-01 18:04:49,628 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 140.6ms TimeCoverageRelationStatistics Valid=135, Invalid=515, Unknown=0, NotChecked=0, Total=650 [2021-06-01 18:04:49,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-06-01 18:04:49,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 226. [2021-06-01 18:04:49,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.1777777777777776) internal successors, (490), 225 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:49,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 490 transitions. [2021-06-01 18:04:49,631 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 490 transitions. Word has length 21 [2021-06-01 18:04:49,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:04:49,631 INFO L482 AbstractCegarLoop]: Abstraction has 226 states and 490 transitions. [2021-06-01 18:04:49,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:49,631 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 490 transitions. [2021-06-01 18:04:49,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-01 18:04:49,632 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:04:49,632 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:04:49,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-01 18:04:49,847 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:04:49,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:04:49,848 INFO L82 PathProgramCache]: Analyzing trace with hash -169772418, now seen corresponding path program 32 times [2021-06-01 18:04:49,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:04:49,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007385690] [2021-06-01 18:04:49,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:04:49,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:04:49,868 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-01 18:04:49,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:04:49,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007385690] [2021-06-01 18:04:49,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007385690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:49,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188595766] [2021-06-01 18:04:49,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:04:49,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:04:49,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:04:49,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-01 18:04:49,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:04:49,944 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:04:49,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188595766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:49,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:04:49,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-01 18:04:49,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621367547] [2021-06-01 18:04:49,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-01 18:04:49,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:04:49,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-01 18:04:49,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:04:49,945 INFO L87 Difference]: Start difference. First operand 226 states and 490 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:50,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:04:50,642 INFO L93 Difference]: Finished difference Result 472 states and 966 transitions. [2021-06-01 18:04:50,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-01 18:04:50,642 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-01 18:04:50,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:04:50,643 INFO L225 Difference]: With dead ends: 472 [2021-06-01 18:04:50,643 INFO L226 Difference]: Without dead ends: 472 [2021-06-01 18:04:50,654 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 793 ImplicationChecksByTransitivity, 468.5ms TimeCoverageRelationStatistics Valid=565, Invalid=2191, Unknown=0, NotChecked=0, Total=2756 [2021-06-01 18:04:50,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-06-01 18:04:50,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 230. [2021-06-01 18:04:50,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.1746724890829694) internal successors, (498), 229 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:50,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 498 transitions. [2021-06-01 18:04:50,658 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 498 transitions. Word has length 21 [2021-06-01 18:04:50,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:04:50,658 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 498 transitions. [2021-06-01 18:04:50,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:50,659 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 498 transitions. [2021-06-01 18:04:50,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-01 18:04:50,659 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:04:50,659 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:04:50,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-01 18:04:50,873 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:04:50,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:04:50,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1140858942, now seen corresponding path program 33 times [2021-06-01 18:04:50,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:04:50,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586558616] [2021-06-01 18:04:50,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:04:50,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:04:50,903 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-01 18:04:50,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:04:50,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586558616] [2021-06-01 18:04:50,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586558616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:50,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648877610] [2021-06-01 18:04:50,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:04:50,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-01 18:04:50,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:04:50,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-01 18:04:50,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:04:51,002 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:04:51,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648877610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:51,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:04:51,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-01 18:04:51,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049630578] [2021-06-01 18:04:51,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-01 18:04:51,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:04:51,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-01 18:04:51,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:04:51,003 INFO L87 Difference]: Start difference. First operand 230 states and 498 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:51,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:04:51,295 INFO L93 Difference]: Finished difference Result 418 states and 797 transitions. [2021-06-01 18:04:51,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-01 18:04:51,295 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-01 18:04:51,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:04:51,296 INFO L225 Difference]: With dead ends: 418 [2021-06-01 18:04:51,296 INFO L226 Difference]: Without dead ends: 398 [2021-06-01 18:04:51,296 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 210.1ms TimeCoverageRelationStatistics Valid=196, Invalid=860, Unknown=0, NotChecked=0, Total=1056 [2021-06-01 18:04:51,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-06-01 18:04:51,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 230. [2021-06-01 18:04:51,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.1572052401746724) internal successors, (494), 229 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:51,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 494 transitions. [2021-06-01 18:04:51,300 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 494 transitions. Word has length 21 [2021-06-01 18:04:51,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:04:51,300 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 494 transitions. [2021-06-01 18:04:51,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:51,300 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 494 transitions. [2021-06-01 18:04:51,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-01 18:04:51,300 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:04:51,300 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:04:51,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-01 18:04:51,516 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:04:51,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:04:51,516 INFO L82 PathProgramCache]: Analyzing trace with hash -1900542150, now seen corresponding path program 34 times [2021-06-01 18:04:51,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:04:51,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955530656] [2021-06-01 18:04:51,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:04:51,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:04:51,542 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:04:51,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:04:51,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955530656] [2021-06-01 18:04:51,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955530656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:51,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472729116] [2021-06-01 18:04:51,542 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:04:51,560 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:04:51,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:04:51,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-01 18:04:51,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:04:51,619 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:04:51,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472729116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:51,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:04:51,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-01 18:04:51,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203919433] [2021-06-01 18:04:51,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-01 18:04:51,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:04:51,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-01 18:04:51,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:04:51,620 INFO L87 Difference]: Start difference. First operand 230 states and 494 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:52,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:04:52,274 INFO L93 Difference]: Finished difference Result 394 states and 828 transitions. [2021-06-01 18:04:52,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-01 18:04:52,274 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-01 18:04:52,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:04:52,276 INFO L225 Difference]: With dead ends: 394 [2021-06-01 18:04:52,276 INFO L226 Difference]: Without dead ends: 392 [2021-06-01 18:04:52,276 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 461.9ms TimeCoverageRelationStatistics Valid=406, Invalid=1400, Unknown=0, NotChecked=0, Total=1806 [2021-06-01 18:04:52,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-06-01 18:04:52,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 227. [2021-06-01 18:04:52,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.1548672566371683) internal successors, (487), 226 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:52,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 487 transitions. [2021-06-01 18:04:52,279 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 487 transitions. Word has length 21 [2021-06-01 18:04:52,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:04:52,279 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 487 transitions. [2021-06-01 18:04:52,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:52,279 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 487 transitions. [2021-06-01 18:04:52,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-01 18:04:52,280 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:04:52,280 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:04:52,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-01 18:04:52,493 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:04:52,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:04:52,493 INFO L82 PathProgramCache]: Analyzing trace with hash 913637562, now seen corresponding path program 35 times [2021-06-01 18:04:52,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:04:52,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33943803] [2021-06-01 18:04:52,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:04:52,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:04:52,523 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:04:52,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:04:52,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33943803] [2021-06-01 18:04:52,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33943803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:52,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404927875] [2021-06-01 18:04:52,524 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:04:52,543 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-01 18:04:52,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:04:52,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-01 18:04:52,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:04:52,616 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:04:52,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404927875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:52,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:04:52,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-01 18:04:52,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509035541] [2021-06-01 18:04:52,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-01 18:04:52,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:04:52,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-01 18:04:52,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:04:52,617 INFO L87 Difference]: Start difference. First operand 227 states and 487 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:52,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:04:52,890 INFO L93 Difference]: Finished difference Result 340 states and 660 transitions. [2021-06-01 18:04:52,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-01 18:04:52,890 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-01 18:04:52,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:04:52,891 INFO L225 Difference]: With dead ends: 340 [2021-06-01 18:04:52,891 INFO L226 Difference]: Without dead ends: 330 [2021-06-01 18:04:52,891 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 221.4ms TimeCoverageRelationStatistics Valid=169, Invalid=701, Unknown=0, NotChecked=0, Total=870 [2021-06-01 18:04:52,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-06-01 18:04:52,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 227. [2021-06-01 18:04:52,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.1371681415929205) internal successors, (483), 226 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:52,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 483 transitions. [2021-06-01 18:04:52,894 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 483 transitions. Word has length 21 [2021-06-01 18:04:52,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:04:52,894 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 483 transitions. [2021-06-01 18:04:52,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:52,895 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 483 transitions. [2021-06-01 18:04:52,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-01 18:04:52,895 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:04:52,895 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:04:53,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-01 18:04:53,111 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:04:53,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:04:53,111 INFO L82 PathProgramCache]: Analyzing trace with hash -459784912, now seen corresponding path program 36 times [2021-06-01 18:04:53,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:04:53,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048317950] [2021-06-01 18:04:53,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:04:53,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:04:53,143 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:04:53,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:04:53,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048317950] [2021-06-01 18:04:53,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048317950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:53,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174207010] [2021-06-01 18:04:53,143 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:04:53,164 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-01 18:04:53,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:04:53,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-01 18:04:53,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:04:53,261 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:04:53,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174207010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:53,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:04:53,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8] total 8 [2021-06-01 18:04:53,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704921131] [2021-06-01 18:04:53,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-01 18:04:53,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:04:53,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-01 18:04:53,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-01 18:04:53,262 INFO L87 Difference]: Start difference. First operand 227 states and 483 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:53,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:04:53,393 INFO L93 Difference]: Finished difference Result 364 states and 746 transitions. [2021-06-01 18:04:53,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-01 18:04:53,393 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-01 18:04:53,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:04:53,394 INFO L225 Difference]: With dead ends: 364 [2021-06-01 18:04:53,394 INFO L226 Difference]: Without dead ends: 357 [2021-06-01 18:04:53,394 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 5 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 67.3ms TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-01 18:04:53,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-06-01 18:04:53,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 296. [2021-06-01 18:04:53,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 2.1796610169491526) internal successors, (643), 295 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:53,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 643 transitions. [2021-06-01 18:04:53,398 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 643 transitions. Word has length 23 [2021-06-01 18:04:53,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:04:53,398 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 643 transitions. [2021-06-01 18:04:53,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:53,398 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 643 transitions. [2021-06-01 18:04:53,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-01 18:04:53,399 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:04:53,399 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:04:53,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-01 18:04:53,599 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:04:53,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:04:53,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1734689328, now seen corresponding path program 37 times [2021-06-01 18:04:53,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:04:53,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881875421] [2021-06-01 18:04:53,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:04:53,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:04:53,631 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-01 18:04:53,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:04:53,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881875421] [2021-06-01 18:04:53,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881875421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:53,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671783756] [2021-06-01 18:04:53,631 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:04:53,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:04:53,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-01 18:04:53,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:04:53,775 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:04:53,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671783756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:53,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:04:53,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8] total 9 [2021-06-01 18:04:53,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64443271] [2021-06-01 18:04:53,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-01 18:04:53,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:04:53,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-01 18:04:53,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-01 18:04:53,776 INFO L87 Difference]: Start difference. First operand 296 states and 643 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:53,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:04:53,928 INFO L93 Difference]: Finished difference Result 431 states and 902 transitions. [2021-06-01 18:04:53,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-01 18:04:53,929 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-01 18:04:53,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:04:53,930 INFO L225 Difference]: With dead ends: 431 [2021-06-01 18:04:53,930 INFO L226 Difference]: Without dead ends: 417 [2021-06-01 18:04:53,930 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 80.1ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-01 18:04:53,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-06-01 18:04:53,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 324. [2021-06-01 18:04:53,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.2321981424148607) internal successors, (721), 323 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:53,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 721 transitions. [2021-06-01 18:04:53,934 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 721 transitions. Word has length 23 [2021-06-01 18:04:53,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:04:53,934 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 721 transitions. [2021-06-01 18:04:53,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:53,934 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 721 transitions. [2021-06-01 18:04:53,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-01 18:04:53,935 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:04:53,935 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:04:54,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-06-01 18:04:54,149 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:04:54,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:04:54,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1856120112, now seen corresponding path program 38 times [2021-06-01 18:04:54,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:04:54,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366443950] [2021-06-01 18:04:54,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:04:54,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:04:54,178 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-01 18:04:54,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:04:54,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366443950] [2021-06-01 18:04:54,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366443950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:54,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264757929] [2021-06-01 18:04:54,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:04:54,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:04:54,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:04:54,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-01 18:04:54,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:04:54,379 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:04:54,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264757929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:54,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:04:54,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8] total 10 [2021-06-01 18:04:54,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352062809] [2021-06-01 18:04:54,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-01 18:04:54,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:04:54,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-01 18:04:54,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:04:54,380 INFO L87 Difference]: Start difference. First operand 324 states and 721 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:54,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:04:54,530 INFO L93 Difference]: Finished difference Result 495 states and 1049 transitions. [2021-06-01 18:04:54,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 18:04:54,531 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-01 18:04:54,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:04:54,532 INFO L225 Difference]: With dead ends: 495 [2021-06-01 18:04:54,532 INFO L226 Difference]: Without dead ends: 481 [2021-06-01 18:04:54,532 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 106.1ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-01 18:04:54,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-06-01 18:04:54,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 356. [2021-06-01 18:04:54,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 2.267605633802817) internal successors, (805), 355 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:54,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 805 transitions. [2021-06-01 18:04:54,536 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 805 transitions. Word has length 23 [2021-06-01 18:04:54,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:04:54,537 INFO L482 AbstractCegarLoop]: Abstraction has 356 states and 805 transitions. [2021-06-01 18:04:54,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:54,537 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 805 transitions. [2021-06-01 18:04:54,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-01 18:04:54,537 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:04:54,537 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:04:54,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:04:54,752 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:04:54,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:04:54,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1707980752, now seen corresponding path program 39 times [2021-06-01 18:04:54,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:04:54,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939712994] [2021-06-01 18:04:54,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:04:54,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:04:54,785 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-01 18:04:54,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:04:54,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939712994] [2021-06-01 18:04:54,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939712994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:54,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283924004] [2021-06-01 18:04:54,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:04:54,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-01 18:04:54,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:04:54,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-01 18:04:54,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:04:54,958 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:04:54,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283924004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:54,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:04:54,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8] total 8 [2021-06-01 18:04:54,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209031224] [2021-06-01 18:04:54,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-01 18:04:54,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:04:54,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-01 18:04:54,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-01 18:04:54,960 INFO L87 Difference]: Start difference. First operand 356 states and 805 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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) [2021-06-01 18:04:55,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:04:55,063 INFO L93 Difference]: Finished difference Result 482 states and 1047 transitions. [2021-06-01 18:04:55,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-01 18:04:55,064 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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 23 [2021-06-01 18:04:55,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:04:55,065 INFO L225 Difference]: With dead ends: 482 [2021-06-01 18:04:55,065 INFO L226 Difference]: Without dead ends: 475 [2021-06-01 18:04:55,065 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 5 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 73.9ms TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-01 18:04:55,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-06-01 18:04:55,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 404. [2021-06-01 18:04:55,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.2853598014888337) internal successors, (921), 403 states have internal predecessors, (921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:55,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 921 transitions. [2021-06-01 18:04:55,070 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 921 transitions. Word has length 23 [2021-06-01 18:04:55,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:04:55,070 INFO L482 AbstractCegarLoop]: Abstraction has 404 states and 921 transitions. [2021-06-01 18:04:55,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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) [2021-06-01 18:04:55,070 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 921 transitions. [2021-06-01 18:04:55,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-01 18:04:55,070 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:04:55,070 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:04:55,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:04:55,286 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:04:55,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:04:55,286 INFO L82 PathProgramCache]: Analyzing trace with hash 942134834, now seen corresponding path program 40 times [2021-06-01 18:04:55,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:04:55,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390416367] [2021-06-01 18:04:55,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:04:55,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:04:55,328 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:04:55,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:04:55,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390416367] [2021-06-01 18:04:55,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390416367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:55,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272794344] [2021-06-01 18:04:55,329 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:04:55,345 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:04:55,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:04:55,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-01 18:04:55,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:04:55,437 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:04:55,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272794344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:55,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:04:55,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:04:55,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656430959] [2021-06-01 18:04:55,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:04:55,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:04:55,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:04:55,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:04:55,438 INFO L87 Difference]: Start difference. First operand 404 states and 921 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:56,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:04:56,985 INFO L93 Difference]: Finished difference Result 869 states and 1808 transitions. [2021-06-01 18:04:56,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-01 18:04:56,985 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-01 18:04:56,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:04:56,988 INFO L225 Difference]: With dead ends: 869 [2021-06-01 18:04:56,988 INFO L226 Difference]: Without dead ends: 869 [2021-06-01 18:04:56,989 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1358 ImplicationChecksByTransitivity, 1100.4ms TimeCoverageRelationStatistics Valid=1023, Invalid=4233, Unknown=0, NotChecked=0, Total=5256 [2021-06-01 18:04:56,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2021-06-01 18:04:56,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 330. [2021-06-01 18:04:56,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.2674772036474162) internal successors, (746), 329 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:56,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 746 transitions. [2021-06-01 18:04:56,993 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 746 transitions. Word has length 25 [2021-06-01 18:04:56,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:04:56,994 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 746 transitions. [2021-06-01 18:04:56,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:56,994 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 746 transitions. [2021-06-01 18:04:56,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-01 18:04:56,994 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:04:56,994 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:04:57,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:04:57,209 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:04:57,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:04:57,210 INFO L82 PathProgramCache]: Analyzing trace with hash -394924434, now seen corresponding path program 41 times [2021-06-01 18:04:57,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:04:57,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124171949] [2021-06-01 18:04:57,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:04:57,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:04:57,251 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:04:57,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:04:57,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124171949] [2021-06-01 18:04:57,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124171949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:57,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034773053] [2021-06-01 18:04:57,251 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:04:57,270 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-01 18:04:57,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:04:57,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-01 18:04:57,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:04:57,367 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:04:57,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034773053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:57,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:04:57,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:04:57,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234146886] [2021-06-01 18:04:57,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:04:57,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:04:57,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:04:57,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:04:57,368 INFO L87 Difference]: Start difference. First operand 330 states and 746 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:58,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:04:58,109 INFO L93 Difference]: Finished difference Result 766 states and 1462 transitions. [2021-06-01 18:04:58,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-01 18:04:58,109 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-01 18:04:58,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:04:58,111 INFO L225 Difference]: With dead ends: 766 [2021-06-01 18:04:58,111 INFO L226 Difference]: Without dead ends: 710 [2021-06-01 18:04:58,111 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 796 ImplicationChecksByTransitivity, 596.5ms TimeCoverageRelationStatistics Valid=540, Invalid=2430, Unknown=0, NotChecked=0, Total=2970 [2021-06-01 18:04:58,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2021-06-01 18:04:58,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 406. [2021-06-01 18:04:58,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.246913580246914) internal successors, (910), 405 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:58,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 910 transitions. [2021-06-01 18:04:58,117 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 910 transitions. Word has length 25 [2021-06-01 18:04:58,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:04:58,117 INFO L482 AbstractCegarLoop]: Abstraction has 406 states and 910 transitions. [2021-06-01 18:04:58,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:58,117 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 910 transitions. [2021-06-01 18:04:58,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-01 18:04:58,118 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:04:58,118 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:04:58,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-06-01 18:04:58,333 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:04:58,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:04:58,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1298777542, now seen corresponding path program 42 times [2021-06-01 18:04:58,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:04:58,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053580700] [2021-06-01 18:04:58,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:04:58,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:04:58,364 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:04:58,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:04:58,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053580700] [2021-06-01 18:04:58,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053580700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:58,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807562017] [2021-06-01 18:04:58,365 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 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 [2021-06-01 18:04:58,385 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-01 18:04:58,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:04:58,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-01 18:04:58,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:04:58,467 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:04:58,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807562017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:58,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:04:58,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2021-06-01 18:04:58,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923842316] [2021-06-01 18:04:58,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-01 18:04:58,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:04:58,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-01 18:04:58,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:04:58,468 INFO L87 Difference]: Start difference. First operand 406 states and 910 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:59,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:04:59,001 INFO L93 Difference]: Finished difference Result 728 states and 1423 transitions. [2021-06-01 18:04:59,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-01 18:04:59,001 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-01 18:04:59,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:04:59,003 INFO L225 Difference]: With dead ends: 728 [2021-06-01 18:04:59,003 INFO L226 Difference]: Without dead ends: 728 [2021-06-01 18:04:59,003 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 378.4ms TimeCoverageRelationStatistics Valid=340, Invalid=1552, Unknown=0, NotChecked=0, Total=1892 [2021-06-01 18:04:59,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2021-06-01 18:04:59,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 402. [2021-06-01 18:04:59,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.2369077306733165) internal successors, (897), 401 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:59,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 897 transitions. [2021-06-01 18:04:59,015 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 897 transitions. Word has length 25 [2021-06-01 18:04:59,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:04:59,015 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 897 transitions. [2021-06-01 18:04:59,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:59,016 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 897 transitions. [2021-06-01 18:04:59,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-01 18:04:59,017 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:04:59,017 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:04:59,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:04:59,225 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:04:59,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:04:59,225 INFO L82 PathProgramCache]: Analyzing trace with hash -85120540, now seen corresponding path program 43 times [2021-06-01 18:04:59,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:04:59,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261126226] [2021-06-01 18:04:59,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:04:59,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:04:59,255 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:04:59,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:04:59,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261126226] [2021-06-01 18:04:59,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261126226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:59,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731170986] [2021-06-01 18:04:59,256 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 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 [2021-06-01 18:04:59,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:04:59,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-01 18:04:59,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:04:59,369 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:04:59,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731170986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:59,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:04:59,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2021-06-01 18:04:59,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92590052] [2021-06-01 18:04:59,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-01 18:04:59,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:04:59,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-01 18:04:59,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:04:59,370 INFO L87 Difference]: Start difference. First operand 402 states and 897 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:59,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:04:59,520 INFO L93 Difference]: Finished difference Result 437 states and 953 transitions. [2021-06-01 18:04:59,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-01 18:04:59,520 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-01 18:04:59,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:04:59,521 INFO L225 Difference]: With dead ends: 437 [2021-06-01 18:04:59,521 INFO L226 Difference]: Without dead ends: 435 [2021-06-01 18:04:59,522 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 80.3ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:04:59,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-06-01 18:04:59,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 402. [2021-06-01 18:04:59,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.2344139650872816) internal successors, (896), 401 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:59,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 896 transitions. [2021-06-01 18:04:59,526 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 896 transitions. Word has length 25 [2021-06-01 18:04:59,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:04:59,526 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 896 transitions. [2021-06-01 18:04:59,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:04:59,526 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 896 transitions. [2021-06-01 18:04:59,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-01 18:04:59,527 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:04:59,527 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:04:59,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:04:59,729 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:04:59,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:04:59,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1036927438, now seen corresponding path program 44 times [2021-06-01 18:04:59,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:04:59,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724519690] [2021-06-01 18:04:59,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:04:59,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:04:59,764 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:04:59,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:04:59,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724519690] [2021-06-01 18:04:59,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724519690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:59,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565041220] [2021-06-01 18:04:59,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:04:59,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:04:59,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:04:59,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-01 18:04:59,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:04:59,875 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:04:59,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565041220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:04:59,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:04:59,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 12 [2021-06-01 18:04:59,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108641850] [2021-06-01 18:04:59,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:04:59,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:04:59,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:04:59,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:04:59,876 INFO L87 Difference]: Start difference. First operand 402 states and 896 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:05:00,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:05:00,578 INFO L93 Difference]: Finished difference Result 1175 states and 2298 transitions. [2021-06-01 18:05:00,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-01 18:05:00,579 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-01 18:05:00,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:05:00,582 INFO L225 Difference]: With dead ends: 1175 [2021-06-01 18:05:00,582 INFO L226 Difference]: Without dead ends: 1175 [2021-06-01 18:05:00,582 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 897 ImplicationChecksByTransitivity, 458.0ms TimeCoverageRelationStatistics Valid=501, Invalid=2469, Unknown=0, NotChecked=0, Total=2970 [2021-06-01 18:05:00,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1175 states. [2021-06-01 18:05:00,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1175 to 477. [2021-06-01 18:05:00,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 2.2668067226890756) internal successors, (1079), 476 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:05:00,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 1079 transitions. [2021-06-01 18:05:00,589 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 1079 transitions. Word has length 25 [2021-06-01 18:05:00,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:05:00,590 INFO L482 AbstractCegarLoop]: Abstraction has 477 states and 1079 transitions. [2021-06-01 18:05:00,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:05:00,590 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 1079 transitions. [2021-06-01 18:05:00,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-01 18:05:00,590 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:05:00,590 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:05:00,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-01 18:05:00,805 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:05:00,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:05:00,806 INFO L82 PathProgramCache]: Analyzing trace with hash -334122130, now seen corresponding path program 45 times [2021-06-01 18:05:00,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:05:00,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777368593] [2021-06-01 18:05:00,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:05:00,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:05:00,830 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:05:00,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:05:00,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777368593] [2021-06-01 18:05:00,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777368593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:05:00,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526225119] [2021-06-01 18:05:00,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:05:00,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-01 18:05:00,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:05:00,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-01 18:05:00,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:05:00,946 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:05:00,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526225119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:05:00,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:05:00,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 12 [2021-06-01 18:05:00,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968538226] [2021-06-01 18:05:00,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:05:00,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:05:00,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:05:00,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:05:00,947 INFO L87 Difference]: Start difference. First operand 477 states and 1079 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:05:01,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:05:01,446 INFO L93 Difference]: Finished difference Result 822 states and 1640 transitions. [2021-06-01 18:05:01,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-01 18:05:01,447 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-01 18:05:01,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:05:01,449 INFO L225 Difference]: With dead ends: 822 [2021-06-01 18:05:01,449 INFO L226 Difference]: Without dead ends: 816 [2021-06-01 18:05:01,450 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 324.0ms TimeCoverageRelationStatistics Valid=321, Invalid=1571, Unknown=0, NotChecked=0, Total=1892 [2021-06-01 18:05:01,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2021-06-01 18:05:01,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 477. [2021-06-01 18:05:01,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 2.264705882352941) internal successors, (1078), 476 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:05:01,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 1078 transitions. [2021-06-01 18:05:01,455 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 1078 transitions. Word has length 25 [2021-06-01 18:05:01,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:05:01,456 INFO L482 AbstractCegarLoop]: Abstraction has 477 states and 1078 transitions. [2021-06-01 18:05:01,456 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:05:01,456 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 1078 transitions. [2021-06-01 18:05:01,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-01 18:05:01,456 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:05:01,456 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:05:01,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-01 18:05:01,657 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:05:01,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:05:01,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1599049990, now seen corresponding path program 46 times [2021-06-01 18:05:01,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:05:01,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388867026] [2021-06-01 18:05:01,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:05:01,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:05:01,685 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-01 18:05:01,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:05:01,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388867026] [2021-06-01 18:05:01,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388867026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:05:01,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56953496] [2021-06-01 18:05:01,685 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:05:01,702 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:05:01,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:05:01,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-01 18:05:01,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:05:01,802 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:05:01,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56953496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:05:01,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:05:01,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 12 [2021-06-01 18:05:01,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224795874] [2021-06-01 18:05:01,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:05:01,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:05:01,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:05:01,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:05:01,803 INFO L87 Difference]: Start difference. First operand 477 states and 1078 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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) [2021-06-01 18:05:02,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:05:02,455 INFO L93 Difference]: Finished difference Result 994 states and 1984 transitions. [2021-06-01 18:05:02,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-01 18:05:02,456 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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 [2021-06-01 18:05:02,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:05:02,458 INFO L225 Difference]: With dead ends: 994 [2021-06-01 18:05:02,458 INFO L226 Difference]: Without dead ends: 994 [2021-06-01 18:05:02,459 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 415.5ms TimeCoverageRelationStatistics Valid=398, Invalid=1954, Unknown=0, NotChecked=0, Total=2352 [2021-06-01 18:05:02,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 994 states. [2021-06-01 18:05:02,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 994 to 478. [2021-06-01 18:05:02,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 477 states have (on average 2.2641509433962264) internal successors, (1080), 477 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:05:02,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 1080 transitions. [2021-06-01 18:05:02,466 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 1080 transitions. Word has length 25 [2021-06-01 18:05:02,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:05:02,466 INFO L482 AbstractCegarLoop]: Abstraction has 478 states and 1080 transitions. [2021-06-01 18:05:02,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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) [2021-06-01 18:05:02,466 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 1080 transitions. [2021-06-01 18:05:02,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-01 18:05:02,466 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:05:02,466 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:05:02,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-01 18:05:02,676 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:05:02,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:05:02,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1312019224, now seen corresponding path program 47 times [2021-06-01 18:05:02,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:05:02,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466858709] [2021-06-01 18:05:02,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:05:02,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:05:02,708 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-01 18:05:02,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:05:02,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466858709] [2021-06-01 18:05:02,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466858709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:05:02,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650932670] [2021-06-01 18:05:02,708 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:05:02,727 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-01 18:05:02,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:05:02,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-01 18:05:02,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:05:02,838 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:05:02,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650932670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:05:02,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:05:02,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 12 [2021-06-01 18:05:02,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953120520] [2021-06-01 18:05:02,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:05:02,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:05:02,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:05:02,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:05:02,839 INFO L87 Difference]: Start difference. First operand 478 states and 1080 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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) [2021-06-01 18:05:03,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:05:03,363 INFO L93 Difference]: Finished difference Result 891 states and 1769 transitions. [2021-06-01 18:05:03,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-01 18:05:03,363 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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 [2021-06-01 18:05:03,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:05:03,365 INFO L225 Difference]: With dead ends: 891 [2021-06-01 18:05:03,365 INFO L226 Difference]: Without dead ends: 887 [2021-06-01 18:05:03,366 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 318.7ms TimeCoverageRelationStatistics Valid=265, Invalid=1375, Unknown=0, NotChecked=0, Total=1640 [2021-06-01 18:05:03,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 887 states. [2021-06-01 18:05:03,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 887 to 480. [2021-06-01 18:05:03,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 479 states have (on average 2.258872651356994) internal successors, (1082), 479 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:05:03,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 1082 transitions. [2021-06-01 18:05:03,372 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 1082 transitions. Word has length 25 [2021-06-01 18:05:03,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:05:03,372 INFO L482 AbstractCegarLoop]: Abstraction has 480 states and 1082 transitions. [2021-06-01 18:05:03,372 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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) [2021-06-01 18:05:03,372 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 1082 transitions. [2021-06-01 18:05:03,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-01 18:05:03,373 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:05:03,373 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:05:03,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:05:03,577 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:05:03,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:05:03,577 INFO L82 PathProgramCache]: Analyzing trace with hash -504958402, now seen corresponding path program 48 times [2021-06-01 18:05:03,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:05:03,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684850143] [2021-06-01 18:05:03,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:05:03,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:05:03,611 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:05:03,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:05:03,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684850143] [2021-06-01 18:05:03,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684850143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:05:03,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067652387] [2021-06-01 18:05:03,611 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-01 18:05:03,629 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-01 18:05:03,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:05:03,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-01 18:05:03,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:05:03,734 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:05:03,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067652387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:05:03,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:05:03,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-01 18:05:03,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544962033] [2021-06-01 18:05:03,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:05:03,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:05:03,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:05:03,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:05:03,735 INFO L87 Difference]: Start difference. First operand 480 states and 1082 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:05:04,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:05:04,480 INFO L93 Difference]: Finished difference Result 903 states and 1798 transitions. [2021-06-01 18:05:04,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-01 18:05:04,480 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-01 18:05:04,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:05:04,482 INFO L225 Difference]: With dead ends: 903 [2021-06-01 18:05:04,482 INFO L226 Difference]: Without dead ends: 903 [2021-06-01 18:05:04,483 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1016 ImplicationChecksByTransitivity, 528.2ms TimeCoverageRelationStatistics Valid=513, Invalid=2679, Unknown=0, NotChecked=0, Total=3192 [2021-06-01 18:05:04,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 903 states. [2021-06-01 18:05:04,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 903 to 464. [2021-06-01 18:05:04,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 2.239740820734341) internal successors, (1037), 463 states have internal predecessors, (1037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:05:04,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1037 transitions. [2021-06-01 18:05:04,498 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1037 transitions. Word has length 25 [2021-06-01 18:05:04,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:05:04,498 INFO L482 AbstractCegarLoop]: Abstraction has 464 states and 1037 transitions. [2021-06-01 18:05:04,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:05:04,498 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1037 transitions. [2021-06-01 18:05:04,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-01 18:05:04,498 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:05:04,498 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:05:04,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:05:04,700 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:05:04,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:05:04,701 INFO L82 PathProgramCache]: Analyzing trace with hash 805672958, now seen corresponding path program 49 times [2021-06-01 18:05:04,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:05:04,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432966714] [2021-06-01 18:05:04,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:05:04,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:05:04,745 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:05:04,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:05:04,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432966714] [2021-06-01 18:05:04,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432966714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:05:04,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821789469] [2021-06-01 18:05:04,745 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-01 18:05:04,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:05:04,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-01 18:05:04,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:05:04,860 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:05:04,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821789469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:05:04,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:05:04,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-01 18:05:04,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602620180] [2021-06-01 18:05:04,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:05:04,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:05:04,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:05:04,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:05:04,862 INFO L87 Difference]: Start difference. First operand 464 states and 1037 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:05:05,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:05:05,403 INFO L93 Difference]: Finished difference Result 827 states and 1634 transitions. [2021-06-01 18:05:05,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-01 18:05:05,404 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-01 18:05:05,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:05:05,406 INFO L225 Difference]: With dead ends: 827 [2021-06-01 18:05:05,406 INFO L226 Difference]: Without dead ends: 821 [2021-06-01 18:05:05,406 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 380.1ms TimeCoverageRelationStatistics Valid=334, Invalid=1736, Unknown=0, NotChecked=0, Total=2070 [2021-06-01 18:05:05,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2021-06-01 18:05:05,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 468. [2021-06-01 18:05:05,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 467 states have (on average 2.233404710920771) internal successors, (1043), 467 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:05:05,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 1043 transitions. [2021-06-01 18:05:05,412 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 1043 transitions. Word has length 25 [2021-06-01 18:05:05,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:05:05,412 INFO L482 AbstractCegarLoop]: Abstraction has 468 states and 1043 transitions. [2021-06-01 18:05:05,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:05:05,413 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 1043 transitions. [2021-06-01 18:05:05,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-01 18:05:05,413 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:05:05,413 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:05:05,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-06-01 18:05:05,614 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:05:05,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:05:05,614 INFO L82 PathProgramCache]: Analyzing trace with hash -306061006, now seen corresponding path program 50 times [2021-06-01 18:05:05,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:05:05,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067607517] [2021-06-01 18:05:05,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:05:05,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:05:05,649 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:05:05,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:05:05,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067607517] [2021-06-01 18:05:05,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067607517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:05:05,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061708997] [2021-06-01 18:05:05,652 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 [2021-06-01 18:05:05,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:05:05,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:05:05,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-01 18:05:05,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:05:05,786 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:05:05,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061708997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:05:05,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:05:05,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-06-01 18:05:05,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615667156] [2021-06-01 18:05:05,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:05:05,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:05:05,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:05:05,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:05:05,787 INFO L87 Difference]: Start difference. First operand 468 states and 1043 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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) [2021-06-01 18:05:06,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:05:06,403 INFO L93 Difference]: Finished difference Result 1176 states and 2324 transitions. [2021-06-01 18:05:06,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-01 18:05:06,403 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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 [2021-06-01 18:05:06,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:05:06,405 INFO L225 Difference]: With dead ends: 1176 [2021-06-01 18:05:06,405 INFO L226 Difference]: Without dead ends: 1176 [2021-06-01 18:05:06,405 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 428.9ms TimeCoverageRelationStatistics Valid=423, Invalid=1833, Unknown=0, NotChecked=0, Total=2256 [2021-06-01 18:05:06,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1176 states. [2021-06-01 18:05:06,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1176 to 469. [2021-06-01 18:05:06,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 2.232905982905983) internal successors, (1045), 468 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:05:06,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 1045 transitions. [2021-06-01 18:05:06,412 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 1045 transitions. Word has length 25 [2021-06-01 18:05:06,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:05:06,412 INFO L482 AbstractCegarLoop]: Abstraction has 469 states and 1045 transitions. [2021-06-01 18:05:06,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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) [2021-06-01 18:05:06,413 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 1045 transitions. [2021-06-01 18:05:06,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-01 18:05:06,413 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:05:06,413 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:05:06,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:05:06,614 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:05:06,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:05:06,614 INFO L82 PathProgramCache]: Analyzing trace with hash 396744302, now seen corresponding path program 51 times [2021-06-01 18:05:06,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:05:06,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548783844] [2021-06-01 18:05:06,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:05:06,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:05:06,639 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:05:06,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:05:06,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548783844] [2021-06-01 18:05:06,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548783844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:05:06,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933549119] [2021-06-01 18:05:06,640 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 [2021-06-01 18:05:06,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-01 18:05:06,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:05:06,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-01 18:05:06,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:05:06,787 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:05:06,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933549119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:05:06,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:05:06,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-06-01 18:05:06,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086347746] [2021-06-01 18:05:06,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:05:06,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:05:06,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:05:06,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:05:06,788 INFO L87 Difference]: Start difference. First operand 469 states and 1045 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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) [2021-06-01 18:05:07,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:05:07,386 INFO L93 Difference]: Finished difference Result 823 states and 1624 transitions. [2021-06-01 18:05:07,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-01 18:05:07,387 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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 25 [2021-06-01 18:05:07,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:05:07,388 INFO L225 Difference]: With dead ends: 823 [2021-06-01 18:05:07,388 INFO L226 Difference]: Without dead ends: 817 [2021-06-01 18:05:07,389 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 352.9ms TimeCoverageRelationStatistics Valid=304, Invalid=1418, Unknown=0, NotChecked=0, Total=1722 [2021-06-01 18:05:07,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2021-06-01 18:05:07,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 469. [2021-06-01 18:05:07,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 2.230769230769231) internal successors, (1044), 468 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:05:07,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 1044 transitions. [2021-06-01 18:05:07,395 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 1044 transitions. Word has length 25 [2021-06-01 18:05:07,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:05:07,395 INFO L482 AbstractCegarLoop]: Abstraction has 469 states and 1044 transitions. [2021-06-01 18:05:07,395 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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) [2021-06-01 18:05:07,395 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 1044 transitions. [2021-06-01 18:05:07,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-01 18:05:07,396 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:05:07,396 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:05:07,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-01 18:05:07,596 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:05:07,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:05:07,597 INFO L82 PathProgramCache]: Analyzing trace with hash -868183558, now seen corresponding path program 52 times [2021-06-01 18:05:07,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:05:07,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632524370] [2021-06-01 18:05:07,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:05:07,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:05:07,626 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-01 18:05:07,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:05:07,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632524370] [2021-06-01 18:05:07,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632524370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:05:07,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169727119] [2021-06-01 18:05:07,626 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 [2021-06-01 18:05:07,645 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:05:07,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:05:07,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-01 18:05:07,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:05:07,751 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:05:07,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169727119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:05:07,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:05:07,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-06-01 18:05:07,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208756083] [2021-06-01 18:05:07,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:05:07,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:05:07,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:05:07,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:05:07,752 INFO L87 Difference]: Start difference. First operand 469 states and 1044 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:05:08,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:05:08,784 INFO L93 Difference]: Finished difference Result 1066 states and 2098 transitions. [2021-06-01 18:05:08,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-01 18:05:08,785 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-01 18:05:08,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:05:08,786 INFO L225 Difference]: With dead ends: 1066 [2021-06-01 18:05:08,786 INFO L226 Difference]: Without dead ends: 1066 [2021-06-01 18:05:08,786 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 568.5ms TimeCoverageRelationStatistics Valid=554, Invalid=2308, Unknown=0, NotChecked=0, Total=2862 [2021-06-01 18:05:08,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2021-06-01 18:05:08,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 470. [2021-06-01 18:05:08,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 2.230277185501066) internal successors, (1046), 469 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:05:08,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 1046 transitions. [2021-06-01 18:05:08,793 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 1046 transitions. Word has length 25 [2021-06-01 18:05:08,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:05:08,793 INFO L482 AbstractCegarLoop]: Abstraction has 470 states and 1046 transitions. [2021-06-01 18:05:08,793 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:05:08,793 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 1046 transitions. [2021-06-01 18:05:08,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-01 18:05:08,794 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:05:08,794 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:05:08,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-01 18:05:08,995 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:05:08,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:05:08,995 INFO L82 PathProgramCache]: Analyzing trace with hash 2042885656, now seen corresponding path program 53 times [2021-06-01 18:05:08,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:05:08,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60637904] [2021-06-01 18:05:08,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:05:08,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:05:09,021 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-01 18:05:09,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:05:09,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60637904] [2021-06-01 18:05:09,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60637904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:05:09,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024789836] [2021-06-01 18:05:09,021 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 [2021-06-01 18:05:09,041 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-01 18:05:09,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:05:09,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-01 18:05:09,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:05:09,150 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:05:09,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024789836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:05:09,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:05:09,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-06-01 18:05:09,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567007136] [2021-06-01 18:05:09,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:05:09,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:05:09,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:05:09,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:05:09,151 INFO L87 Difference]: Start difference. First operand 470 states and 1046 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:05:09,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:05:09,680 INFO L93 Difference]: Finished difference Result 912 states and 1823 transitions. [2021-06-01 18:05:09,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-01 18:05:09,680 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-01 18:05:09,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:05:09,681 INFO L225 Difference]: With dead ends: 912 [2021-06-01 18:05:09,681 INFO L226 Difference]: Without dead ends: 908 [2021-06-01 18:05:09,682 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 319.0ms TimeCoverageRelationStatistics Valid=246, Invalid=1160, Unknown=0, NotChecked=0, Total=1406 [2021-06-01 18:05:09,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 908 states. [2021-06-01 18:05:09,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 908 to 470. [2021-06-01 18:05:09,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 2.228144989339019) internal successors, (1045), 469 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:05:09,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 1045 transitions. [2021-06-01 18:05:09,688 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 1045 transitions. Word has length 25 [2021-06-01 18:05:09,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:05:09,688 INFO L482 AbstractCegarLoop]: Abstraction has 470 states and 1045 transitions. [2021-06-01 18:05:09,688 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:05:09,688 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 1045 transitions. [2021-06-01 18:05:09,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-01 18:05:09,688 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:05:09,689 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:05:09,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-01 18:05:09,889 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:05:09,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:05:09,889 INFO L82 PathProgramCache]: Analyzing trace with hash 225908030, now seen corresponding path program 54 times [2021-06-01 18:05:09,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:05:09,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899301478] [2021-06-01 18:05:09,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:05:09,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:05:09,923 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-01 18:05:09,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:05:09,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899301478] [2021-06-01 18:05:09,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899301478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:05:09,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32290239] [2021-06-01 18:05:09,923 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 [2021-06-01 18:05:09,942 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-01 18:05:09,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:05:09,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-01 18:05:09,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:05:10,062 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:05:10,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32290239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:05:10,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:05:10,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-01 18:05:10,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451813908] [2021-06-01 18:05:10,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:05:10,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:05:10,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:05:10,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:05:10,063 INFO L87 Difference]: Start difference. First operand 470 states and 1045 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:05:11,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:05:11,874 INFO L93 Difference]: Finished difference Result 1348 states and 2688 transitions. [2021-06-01 18:05:11,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-01 18:05:11,874 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-01 18:05:11,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:05:11,875 INFO L225 Difference]: With dead ends: 1348 [2021-06-01 18:05:11,875 INFO L226 Difference]: Without dead ends: 1348 [2021-06-01 18:05:11,876 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2465 ImplicationChecksByTransitivity, 1128.3ms TimeCoverageRelationStatistics Valid=1189, Invalid=5783, Unknown=0, NotChecked=0, Total=6972 [2021-06-01 18:05:11,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1348 states. [2021-06-01 18:05:11,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1348 to 472. [2021-06-01 18:05:11,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 471 states have (on average 2.2271762208067942) internal successors, (1049), 471 states have internal predecessors, (1049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:05:11,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 1049 transitions. [2021-06-01 18:05:11,883 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 1049 transitions. Word has length 25 [2021-06-01 18:05:11,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:05:11,884 INFO L482 AbstractCegarLoop]: Abstraction has 472 states and 1049 transitions. [2021-06-01 18:05:11,884 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:05:11,884 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 1049 transitions. [2021-06-01 18:05:11,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-01 18:05:11,884 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:05:11,884 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:05:12,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-01 18:05:12,099 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:05:12,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:05:12,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1536539390, now seen corresponding path program 55 times [2021-06-01 18:05:12,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:05:12,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530831809] [2021-06-01 18:05:12,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:05:12,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:05:12,129 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-01 18:05:12,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:05:12,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530831809] [2021-06-01 18:05:12,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530831809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:05:12,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606274235] [2021-06-01 18:05:12,129 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 [2021-06-01 18:05:12,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:05:12,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-01 18:05:12,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:05:12,260 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:05:12,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606274235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:05:12,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:05:12,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-01 18:05:12,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954167842] [2021-06-01 18:05:12,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 18:05:12,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:05:12,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 18:05:12,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-01 18:05:12,261 INFO L87 Difference]: Start difference. First operand 472 states and 1049 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:05:12,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:05:12,847 INFO L93 Difference]: Finished difference Result 861 states and 1700 transitions. [2021-06-01 18:05:12,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-01 18:05:12,847 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-01 18:05:12,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:05:12,848 INFO L225 Difference]: With dead ends: 861 [2021-06-01 18:05:12,848 INFO L226 Difference]: Without dead ends: 841 [2021-06-01 18:05:12,849 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 399.1ms TimeCoverageRelationStatistics Valid=330, Invalid=1740, Unknown=0, NotChecked=0, Total=2070 [2021-06-01 18:05:12,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2021-06-01 18:05:12,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 472. [2021-06-01 18:05:12,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 471 states have (on average 2.2229299363057327) internal successors, (1047), 471 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:05:12,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 1047 transitions. [2021-06-01 18:05:12,854 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 1047 transitions. Word has length 25 [2021-06-01 18:05:12,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:05:12,854 INFO L482 AbstractCegarLoop]: Abstraction has 472 states and 1047 transitions. [2021-06-01 18:05:12,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:05:12,855 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 1047 transitions. [2021-06-01 18:05:12,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-01 18:05:12,855 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:05:12,855 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:05:13,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:05:13,056 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:05:13,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:05:13,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1504861702, now seen corresponding path program 56 times [2021-06-01 18:05:13,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:05:13,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349285577] [2021-06-01 18:05:13,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:05:13,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:05:13,101 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:05:13,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:05:13,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349285577] [2021-06-01 18:05:13,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349285577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:05:13,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395305812] [2021-06-01 18:05:13,101 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 [2021-06-01 18:05:13,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:05:13,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:05:13,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-01 18:05:13,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:05:13,236 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:05:13,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395305812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:05:13,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:05:13,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:05:13,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845229981] [2021-06-01 18:05:13,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-01 18:05:13,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:05:13,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-01 18:05:13,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-01 18:05:13,237 INFO L87 Difference]: Start difference. First operand 472 states and 1047 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:05:14,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:05:14,987 INFO L93 Difference]: Finished difference Result 984 states and 1997 transitions. [2021-06-01 18:05:14,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-01 18:05:14,987 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-01 18:05:14,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:05:14,988 INFO L225 Difference]: With dead ends: 984 [2021-06-01 18:05:14,988 INFO L226 Difference]: Without dead ends: 982 [2021-06-01 18:05:14,989 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1628 ImplicationChecksByTransitivity, 1124.5ms TimeCoverageRelationStatistics Valid=975, Invalid=4427, Unknown=0, NotChecked=0, Total=5402 [2021-06-01 18:05:14,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 982 states. [2021-06-01 18:05:14,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 982 to 436. [2021-06-01 18:05:14,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 2.197701149425287) internal successors, (956), 435 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:05:14,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 956 transitions. [2021-06-01 18:05:14,995 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 956 transitions. Word has length 25 [2021-06-01 18:05:14,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:05:14,995 INFO L482 AbstractCegarLoop]: Abstraction has 436 states and 956 transitions. [2021-06-01 18:05:14,995 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:05:14,995 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 956 transitions. [2021-06-01 18:05:14,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-01 18:05:14,995 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:05:14,995 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:05:15,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-01 18:05:15,197 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:05:15,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:05:15,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1309318010, now seen corresponding path program 57 times [2021-06-01 18:05:15,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:05:15,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986287081] [2021-06-01 18:05:15,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:05:15,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:05:15,245 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:05:15,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:05:15,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986287081] [2021-06-01 18:05:15,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986287081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:05:15,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908717785] [2021-06-01 18:05:15,245 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 [2021-06-01 18:05:15,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-01 18:05:15,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:05:15,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-01 18:05:15,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:05:15,394 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:05:15,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908717785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:05:15,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:05:15,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:05:15,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169903884] [2021-06-01 18:05:15,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-01 18:05:15,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:05:15,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-01 18:05:15,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-01 18:05:15,395 INFO L87 Difference]: Start difference. First operand 436 states and 956 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:05:15,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:05:15,959 INFO L93 Difference]: Finished difference Result 695 states and 1377 transitions. [2021-06-01 18:05:15,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-01 18:05:15,960 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-01 18:05:15,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:05:15,961 INFO L225 Difference]: With dead ends: 695 [2021-06-01 18:05:15,961 INFO L226 Difference]: Without dead ends: 685 [2021-06-01 18:05:15,961 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 425.0ms TimeCoverageRelationStatistics Valid=281, Invalid=1441, Unknown=0, NotChecked=0, Total=1722 [2021-06-01 18:05:15,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2021-06-01 18:05:15,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 436. [2021-06-01 18:05:15,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 2.193103448275862) internal successors, (954), 435 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:05:15,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 954 transitions. [2021-06-01 18:05:15,966 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 954 transitions. Word has length 25 [2021-06-01 18:05:15,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:05:15,966 INFO L482 AbstractCegarLoop]: Abstraction has 436 states and 954 transitions. [2021-06-01 18:05:15,966 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:05:15,966 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 954 transitions. [2021-06-01 18:05:15,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-01 18:05:15,967 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:05:15,967 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:05:16,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:05:16,168 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:05:16,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:05:16,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1091186638, now seen corresponding path program 58 times [2021-06-01 18:05:16,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:05:16,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850395507] [2021-06-01 18:05:16,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:05:16,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:05:16,206 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:05:16,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:05:16,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850395507] [2021-06-01 18:05:16,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850395507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:05:16,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908037816] [2021-06-01 18:05:16,207 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 [2021-06-01 18:05:16,225 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:05:16,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:05:16,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-01 18:05:16,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:05:16,342 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:05:16,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908037816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:05:16,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:05:16,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:05:16,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293560459] [2021-06-01 18:05:16,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-01 18:05:16,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:05:16,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-01 18:05:16,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-01 18:05:16,343 INFO L87 Difference]: Start difference. First operand 436 states and 954 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:05:17,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:05:17,932 INFO L93 Difference]: Finished difference Result 1039 states and 2080 transitions. [2021-06-01 18:05:17,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-01 18:05:17,932 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-01 18:05:17,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:05:17,933 INFO L225 Difference]: With dead ends: 1039 [2021-06-01 18:05:17,933 INFO L226 Difference]: Without dead ends: 1039 [2021-06-01 18:05:17,934 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1614 ImplicationChecksByTransitivity, 1081.7ms TimeCoverageRelationStatistics Valid=950, Invalid=4306, Unknown=0, NotChecked=0, Total=5256 [2021-06-01 18:05:17,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1039 states. [2021-06-01 18:05:17,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1039 to 402. [2021-06-01 18:05:17,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.1596009975062342) internal successors, (866), 401 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:05:17,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 866 transitions. [2021-06-01 18:05:17,939 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 866 transitions. Word has length 25 [2021-06-01 18:05:17,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:05:17,939 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 866 transitions. [2021-06-01 18:05:17,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:05:17,940 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 866 transitions. [2021-06-01 18:05:17,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-01 18:05:17,940 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:05:17,940 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:05:18,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-06-01 18:05:18,141 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:05:18,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:05:18,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1088108690, now seen corresponding path program 59 times [2021-06-01 18:05:18,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:05:18,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415194358] [2021-06-01 18:05:18,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:05:18,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:05:18,184 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:05:18,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:05:18,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415194358] [2021-06-01 18:05:18,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415194358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:05:18,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858753063] [2021-06-01 18:05:18,185 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 [2021-06-01 18:05:18,204 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-01 18:05:18,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:05:18,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-01 18:05:18,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:05:18,314 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:05:18,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858753063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:05:18,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:05:18,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-01 18:05:18,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083911953] [2021-06-01 18:05:18,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-01 18:05:18,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:05:18,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-01 18:05:18,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-01 18:05:18,315 INFO L87 Difference]: Start difference. First operand 402 states and 866 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:05:18,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:05:18,850 INFO L93 Difference]: Finished difference Result 548 states and 1068 transitions. [2021-06-01 18:05:18,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-01 18:05:18,851 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-01 18:05:18,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:05:18,852 INFO L225 Difference]: With dead ends: 548 [2021-06-01 18:05:18,852 INFO L226 Difference]: Without dead ends: 518 [2021-06-01 18:05:18,852 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 411.3ms TimeCoverageRelationStatistics Valid=310, Invalid=1582, Unknown=0, NotChecked=0, Total=1892 [2021-06-01 18:05:18,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-06-01 18:05:18,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 381. [2021-06-01 18:05:18,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 380 states have (on average 2.168421052631579) internal successors, (824), 380 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:05:18,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 824 transitions. [2021-06-01 18:05:18,856 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 824 transitions. Word has length 25 [2021-06-01 18:05:18,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:05:18,856 INFO L482 AbstractCegarLoop]: Abstraction has 381 states and 824 transitions. [2021-06-01 18:05:18,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:05:18,856 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 824 transitions. [2021-06-01 18:05:18,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-01 18:05:18,856 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:05:18,857 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:05:19,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:05:19,072 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:05:19,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:05:19,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1258665422, now seen corresponding path program 60 times [2021-06-01 18:05:19,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:05:19,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576115360] [2021-06-01 18:05:19,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:05:19,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:05:19,106 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:05:19,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:05:19,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576115360] [2021-06-01 18:05:19,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576115360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:05:19,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794412224] [2021-06-01 18:05:19,107 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-01 18:05:19,126 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-01 18:05:19,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:05:19,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-01 18:05:19,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:05:19,221 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:05:19,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794412224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:05:19,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:05:19,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-01 18:05:19,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245488823] [2021-06-01 18:05:19,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:05:19,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:05:19,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:05:19,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:05:19,223 INFO L87 Difference]: Start difference. First operand 381 states and 824 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 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) [2021-06-01 18:05:19,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:05:19,932 INFO L93 Difference]: Finished difference Result 749 states and 1476 transitions. [2021-06-01 18:05:19,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-01 18:05:19,933 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 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 25 [2021-06-01 18:05:19,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:05:19,934 INFO L225 Difference]: With dead ends: 749 [2021-06-01 18:05:19,934 INFO L226 Difference]: Without dead ends: 749 [2021-06-01 18:05:19,934 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 519.3ms TimeCoverageRelationStatistics Valid=498, Invalid=2582, Unknown=0, NotChecked=0, Total=3080 [2021-06-01 18:05:19,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2021-06-01 18:05:19,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 375. [2021-06-01 18:05:19,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 374 states have (on average 2.1550802139037435) internal successors, (806), 374 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:05:19,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 806 transitions. [2021-06-01 18:05:19,939 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 806 transitions. Word has length 25 [2021-06-01 18:05:19,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:05:19,939 INFO L482 AbstractCegarLoop]: Abstraction has 375 states and 806 transitions. [2021-06-01 18:05:19,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 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) [2021-06-01 18:05:19,939 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 806 transitions. [2021-06-01 18:05:19,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-01 18:05:19,939 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:05:19,939 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:05:20,155 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-06-01 18:05:20,155 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:05:20,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:05:20,155 INFO L82 PathProgramCache]: Analyzing trace with hash -172629906, now seen corresponding path program 61 times [2021-06-01 18:05:20,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:05:20,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056958943] [2021-06-01 18:05:20,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:05:20,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:05:20,192 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:05:20,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:05:20,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056958943] [2021-06-01 18:05:20,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056958943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:05:20,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235980741] [2021-06-01 18:05:20,193 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:05:20,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:05:20,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-01 18:05:20,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:05:20,310 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:05:20,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235980741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:05:20,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:05:20,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-01 18:05:20,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774737153] [2021-06-01 18:05:20,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:05:20,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:05:20,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:05:20,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:05:20,311 INFO L87 Difference]: Start difference. First operand 375 states and 806 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:05:20,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:05:20,881 INFO L93 Difference]: Finished difference Result 567 states and 1087 transitions. [2021-06-01 18:05:20,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-01 18:05:20,882 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-01 18:05:20,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:05:20,882 INFO L225 Difference]: With dead ends: 567 [2021-06-01 18:05:20,882 INFO L226 Difference]: Without dead ends: 558 [2021-06-01 18:05:20,883 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 361.9ms TimeCoverageRelationStatistics Valid=316, Invalid=1754, Unknown=0, NotChecked=0, Total=2070 [2021-06-01 18:05:20,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-06-01 18:05:20,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 360. [2021-06-01 18:05:20,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 2.161559888579387) internal successors, (776), 359 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:05:20,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 776 transitions. [2021-06-01 18:05:20,886 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 776 transitions. Word has length 25 [2021-06-01 18:05:20,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:05:20,887 INFO L482 AbstractCegarLoop]: Abstraction has 360 states and 776 transitions. [2021-06-01 18:05:20,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:05:20,887 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 776 transitions. [2021-06-01 18:05:20,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-01 18:05:20,887 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:05:20,887 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:05:21,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:05:21,093 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:05:21,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:05:21,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1976910898, now seen corresponding path program 62 times [2021-06-01 18:05:21,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:05:21,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403109645] [2021-06-01 18:05:21,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:05:21,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:05:21,127 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:05:21,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:05:21,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403109645] [2021-06-01 18:05:21,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403109645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:05:21,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242115380] [2021-06-01 18:05:21,127 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 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 [2021-06-01 18:05:21,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:05:21,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:05:21,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-01 18:05:21,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:05:21,253 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:05:21,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242115380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:05:21,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:05:21,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2021-06-01 18:05:21,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930503316] [2021-06-01 18:05:21,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-01 18:05:21,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:05:21,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-01 18:05:21,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:05:21,254 INFO L87 Difference]: Start difference. First operand 360 states and 776 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 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) [2021-06-01 18:05:21,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:05:21,715 INFO L93 Difference]: Finished difference Result 680 states and 1310 transitions. [2021-06-01 18:05:21,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-01 18:05:21,715 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 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 25 [2021-06-01 18:05:21,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:05:21,716 INFO L225 Difference]: With dead ends: 680 [2021-06-01 18:05:21,716 INFO L226 Difference]: Without dead ends: 680 [2021-06-01 18:05:21,716 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 356.8ms TimeCoverageRelationStatistics Valid=340, Invalid=1552, Unknown=0, NotChecked=0, Total=1892 [2021-06-01 18:05:21,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2021-06-01 18:05:21,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 360. [2021-06-01 18:05:21,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 2.1587743732590527) internal successors, (775), 359 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:05:21,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 775 transitions. [2021-06-01 18:05:21,721 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 775 transitions. Word has length 25 [2021-06-01 18:05:21,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:05:21,721 INFO L482 AbstractCegarLoop]: Abstraction has 360 states and 775 transitions. [2021-06-01 18:05:21,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 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) [2021-06-01 18:05:21,721 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 775 transitions. [2021-06-01 18:05:21,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-01 18:05:21,721 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:05:21,721 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:05:21,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-01 18:05:21,925 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:05:21,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:05:21,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1615251090, now seen corresponding path program 63 times [2021-06-01 18:05:21,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:05:21,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990508342] [2021-06-01 18:05:21,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:05:21,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:05:21,949 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:05:21,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:05:21,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990508342] [2021-06-01 18:05:21,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990508342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:05:21,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419280576] [2021-06-01 18:05:21,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-01 18:05:21,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-01 18:05:21,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:05:21,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-01 18:05:21,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:05:22,061 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:05:22,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419280576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:05:22,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:05:22,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2021-06-01 18:05:22,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986357072] [2021-06-01 18:05:22,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-01 18:05:22,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:05:22,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-01 18:05:22,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:05:22,062 INFO L87 Difference]: Start difference. First operand 360 states and 775 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:05:22,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:05:22,347 INFO L93 Difference]: Finished difference Result 441 states and 888 transitions. [2021-06-01 18:05:22,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-01 18:05:22,347 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-01 18:05:22,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:05:22,348 INFO L225 Difference]: With dead ends: 441 [2021-06-01 18:05:22,348 INFO L226 Difference]: Without dead ends: 438 [2021-06-01 18:05:22,348 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 172.1ms TimeCoverageRelationStatistics Valid=125, Invalid=427, Unknown=0, NotChecked=0, Total=552 [2021-06-01 18:05:22,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-06-01 18:05:22,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 357. [2021-06-01 18:05:22,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 2.1601123595505616) internal successors, (769), 356 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:05:22,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 769 transitions. [2021-06-01 18:05:22,351 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 769 transitions. Word has length 25 [2021-06-01 18:05:22,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:05:22,351 INFO L482 AbstractCegarLoop]: Abstraction has 357 states and 769 transitions. [2021-06-01 18:05:22,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:05:22,351 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 769 transitions. [2021-06-01 18:05:22,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-01 18:05:22,352 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:05:22,352 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:05:22,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:05:22,552 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:05:22,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:05:22,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1414788346, now seen corresponding path program 64 times [2021-06-01 18:05:22,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:05:22,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766958215] [2021-06-01 18:05:22,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:05:22,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:05:22,582 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:05:22,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:05:22,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766958215] [2021-06-01 18:05:22,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766958215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:05:22,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958812092] [2021-06-01 18:05:22,582 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:05:22,599 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:05:22,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:05:22,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-01 18:05:22,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:05:22,680 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:05:22,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958812092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:05:22,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:05:22,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2021-06-01 18:05:22,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167757469] [2021-06-01 18:05:22,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-01 18:05:22,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:05:22,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-01 18:05:22,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:05:22,682 INFO L87 Difference]: Start difference. First operand 357 states and 769 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:05:23,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:05:23,135 INFO L93 Difference]: Finished difference Result 498 states and 1005 transitions. [2021-06-01 18:05:23,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-01 18:05:23,135 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-01 18:05:23,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:05:23,136 INFO L225 Difference]: With dead ends: 498 [2021-06-01 18:05:23,136 INFO L226 Difference]: Without dead ends: 498 [2021-06-01 18:05:23,136 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 308.0ms TimeCoverageRelationStatistics Valid=297, Invalid=1035, Unknown=0, NotChecked=0, Total=1332 [2021-06-01 18:05:23,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-06-01 18:05:23,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 358. [2021-06-01 18:05:23,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 2.1596638655462184) internal successors, (771), 357 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:05:23,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 771 transitions. [2021-06-01 18:05:23,140 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 771 transitions. Word has length 25 [2021-06-01 18:05:23,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:05:23,140 INFO L482 AbstractCegarLoop]: Abstraction has 358 states and 771 transitions. [2021-06-01 18:05:23,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:05:23,140 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 771 transitions. [2021-06-01 18:05:23,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-01 18:05:23,140 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:05:23,140 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:05:23,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-01 18:05:23,356 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:05:23,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:05:23,356 INFO L82 PathProgramCache]: Analyzing trace with hash 30890264, now seen corresponding path program 65 times [2021-06-01 18:05:23,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:05:23,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980106451] [2021-06-01 18:05:23,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:05:23,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:05:23,382 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:05:23,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:05:23,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980106451] [2021-06-01 18:05:23,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980106451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:05:23,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930275059] [2021-06-01 18:05:23,383 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:05:23,401 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-01 18:05:23,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:05:23,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-01 18:05:23,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:05:23,483 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:05:23,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930275059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:05:23,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:05:23,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2021-06-01 18:05:23,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709400418] [2021-06-01 18:05:23,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-01 18:05:23,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:05:23,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-01 18:05:23,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-01 18:05:23,484 INFO L87 Difference]: Start difference. First operand 358 states and 771 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:05:23,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:05:23,870 INFO L93 Difference]: Finished difference Result 633 states and 1215 transitions. [2021-06-01 18:05:23,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-01 18:05:23,871 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-01 18:05:23,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:05:23,871 INFO L225 Difference]: With dead ends: 633 [2021-06-01 18:05:23,871 INFO L226 Difference]: Without dead ends: 631 [2021-06-01 18:05:23,872 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 296.9ms TimeCoverageRelationStatistics Valid=268, Invalid=1292, Unknown=0, NotChecked=0, Total=1560 [2021-06-01 18:05:23,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-06-01 18:05:23,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 358. [2021-06-01 18:05:23,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 2.156862745098039) internal successors, (770), 357 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:05:23,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 770 transitions. [2021-06-01 18:05:23,876 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 770 transitions. Word has length 25 [2021-06-01 18:05:23,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:05:23,876 INFO L482 AbstractCegarLoop]: Abstraction has 358 states and 770 transitions. [2021-06-01 18:05:23,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:05:23,876 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 770 transitions. [2021-06-01 18:05:23,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-01 18:05:23,876 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:05:23,876 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:05:24,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-01 18:05:24,093 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:05:24,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:05:24,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1786087362, now seen corresponding path program 66 times [2021-06-01 18:05:24,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:05:24,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283892999] [2021-06-01 18:05:24,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:05:24,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:05:24,117 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-01 18:05:24,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:05:24,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283892999] [2021-06-01 18:05:24,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283892999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:05:24,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238297620] [2021-06-01 18:05:24,117 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-01 18:05:24,146 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-01 18:05:24,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:05:24,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-01 18:05:24,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:05:24,231 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:05:24,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238297620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:05:24,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:05:24,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 12 [2021-06-01 18:05:24,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858953321] [2021-06-01 18:05:24,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:05:24,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:05:24,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:05:24,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:05:24,232 INFO L87 Difference]: Start difference. First operand 358 states and 770 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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) [2021-06-01 18:05:25,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:05:25,535 INFO L93 Difference]: Finished difference Result 741 states and 1512 transitions. [2021-06-01 18:05:25,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-01 18:05:25,536 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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 [2021-06-01 18:05:25,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:05:25,537 INFO L225 Difference]: With dead ends: 741 [2021-06-01 18:05:25,537 INFO L226 Difference]: Without dead ends: 741 [2021-06-01 18:05:25,537 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2066 ImplicationChecksByTransitivity, 908.7ms TimeCoverageRelationStatistics Valid=1079, Invalid=5241, Unknown=0, NotChecked=0, Total=6320 [2021-06-01 18:05:25,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2021-06-01 18:05:25,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 362. [2021-06-01 18:05:25,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 2.155124653739612) internal successors, (778), 361 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:05:25,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 778 transitions. [2021-06-01 18:05:25,541 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 778 transitions. Word has length 25 [2021-06-01 18:05:25,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:05:25,541 INFO L482 AbstractCegarLoop]: Abstraction has 362 states and 778 transitions. [2021-06-01 18:05:25,541 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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) [2021-06-01 18:05:25,541 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 778 transitions. [2021-06-01 18:05:25,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-01 18:05:25,542 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:05:25,542 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:05:25,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-01 18:05:25,742 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:05:25,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:05:25,742 INFO L82 PathProgramCache]: Analyzing trace with hash -475456002, now seen corresponding path program 67 times [2021-06-01 18:05:25,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:05:25,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658845469] [2021-06-01 18:05:25,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:05:25,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:05:25,770 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-01 18:05:25,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:05:25,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658845469] [2021-06-01 18:05:25,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658845469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:05:25,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551750961] [2021-06-01 18:05:25,770 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-01 18:05:25,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:05:25,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-01 18:05:25,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:05:25,879 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:05:25,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551750961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:05:25,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:05:25,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 12 [2021-06-01 18:05:25,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756615631] [2021-06-01 18:05:25,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 18:05:25,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:05:25,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 18:05:25,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-01 18:05:25,880 INFO L87 Difference]: Start difference. First operand 362 states and 778 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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) [2021-06-01 18:05:26,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:05:26,497 INFO L93 Difference]: Finished difference Result 727 states and 1360 transitions. [2021-06-01 18:05:26,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-01 18:05:26,497 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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 [2021-06-01 18:05:26,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:05:26,498 INFO L225 Difference]: With dead ends: 727 [2021-06-01 18:05:26,498 INFO L226 Difference]: Without dead ends: 707 [2021-06-01 18:05:26,498 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 723 ImplicationChecksByTransitivity, 467.7ms TimeCoverageRelationStatistics Valid=429, Invalid=2223, Unknown=0, NotChecked=0, Total=2652 [2021-06-01 18:05:26,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2021-06-01 18:05:26,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 362. [2021-06-01 18:05:26,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 2.14404432132964) internal successors, (774), 361 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:05:26,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 774 transitions. [2021-06-01 18:05:26,502 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 774 transitions. Word has length 25 [2021-06-01 18:05:26,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:05:26,503 INFO L482 AbstractCegarLoop]: Abstraction has 362 states and 774 transitions. [2021-06-01 18:05:26,503 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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) [2021-06-01 18:05:26,503 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 774 transitions. [2021-06-01 18:05:26,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-01 18:05:26,503 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:05:26,503 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:05:26,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:05:26,704 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:05:26,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:05:26,704 INFO L82 PathProgramCache]: Analyzing trace with hash 778110202, now seen corresponding path program 68 times [2021-06-01 18:05:26,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:05:26,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149540171] [2021-06-01 18:05:26,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:05:26,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:05:26,740 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-01 18:05:26,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:05:26,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149540171] [2021-06-01 18:05:26,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149540171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:05:26,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612636387] [2021-06-01 18:05:26,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:05:26,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 18:05:26,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:05:26,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-01 18:05:26,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:05:26,858 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:05:26,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612636387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:05:26,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:05:26,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-01 18:05:26,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289550454] [2021-06-01 18:05:26,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:05:26,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:05:26,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:05:26,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:05:26,859 INFO L87 Difference]: Start difference. First operand 362 states and 774 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:05:28,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:05:28,727 INFO L93 Difference]: Finished difference Result 856 states and 1795 transitions. [2021-06-01 18:05:28,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-06-01 18:05:28,727 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-01 18:05:28,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:05:28,728 INFO L225 Difference]: With dead ends: 856 [2021-06-01 18:05:28,728 INFO L226 Difference]: Without dead ends: 852 [2021-06-01 18:05:28,729 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3402 ImplicationChecksByTransitivity, 1407.4ms TimeCoverageRelationStatistics Valid=1807, Invalid=7895, Unknown=0, NotChecked=0, Total=9702 [2021-06-01 18:05:28,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2021-06-01 18:05:28,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 366. [2021-06-01 18:05:28,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 2.1424657534246574) internal successors, (782), 365 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:05:28,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 782 transitions. [2021-06-01 18:05:28,733 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 782 transitions. Word has length 25 [2021-06-01 18:05:28,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:05:28,733 INFO L482 AbstractCegarLoop]: Abstraction has 366 states and 782 transitions. [2021-06-01 18:05:28,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:05:28,734 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 782 transitions. [2021-06-01 18:05:28,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-01 18:05:28,734 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:05:28,734 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:05:28,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:05:28,949 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:05:28,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:05:28,950 INFO L82 PathProgramCache]: Analyzing trace with hash -702677382, now seen corresponding path program 69 times [2021-06-01 18:05:28,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:05:28,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783100064] [2021-06-01 18:05:28,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:05:28,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:05:28,979 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-01 18:05:28,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:05:28,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783100064] [2021-06-01 18:05:28,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783100064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:05:28,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086822290] [2021-06-01 18:05:28,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-01 18:05:28,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-01 18:05:28,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:05:28,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-01 18:05:28,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:05:29,084 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:05:29,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086822290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:05:29,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:05:29,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-01 18:05:29,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547571138] [2021-06-01 18:05:29,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:05:29,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:05:29,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:05:29,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:05:29,085 INFO L87 Difference]: Start difference. First operand 366 states and 782 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:05:29,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:05:29,773 INFO L93 Difference]: Finished difference Result 718 states and 1344 transitions. [2021-06-01 18:05:29,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-01 18:05:29,773 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-01 18:05:29,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:05:29,774 INFO L225 Difference]: With dead ends: 718 [2021-06-01 18:05:29,774 INFO L226 Difference]: Without dead ends: 688 [2021-06-01 18:05:29,775 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 923 ImplicationChecksByTransitivity, 561.6ms TimeCoverageRelationStatistics Valid=555, Invalid=2751, Unknown=0, NotChecked=0, Total=3306 [2021-06-01 18:05:29,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2021-06-01 18:05:29,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 368. [2021-06-01 18:05:29,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 2.128065395095368) internal successors, (781), 367 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:05:29,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 781 transitions. [2021-06-01 18:05:29,779 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 781 transitions. Word has length 25 [2021-06-01 18:05:29,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:05:29,779 INFO L482 AbstractCegarLoop]: Abstraction has 368 states and 781 transitions. [2021-06-01 18:05:29,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:05:29,779 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 781 transitions. [2021-06-01 18:05:29,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-01 18:05:29,780 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:05:29,780 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:05:29,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:05:29,995 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:05:29,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:05:29,996 INFO L82 PathProgramCache]: Analyzing trace with hash -339258698, now seen corresponding path program 70 times [2021-06-01 18:05:29,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:05:29,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637396462] [2021-06-01 18:05:29,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:05:29,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:05:30,031 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:05:30,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:05:30,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637396462] [2021-06-01 18:05:30,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637396462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:05:30,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997935061] [2021-06-01 18:05:30,032 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:05:30,060 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 18:05:30,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:05:30,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-01 18:05:30,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 18:05:30,149 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:05:30,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997935061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:05:30,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:05:30,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:05:30,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021073350] [2021-06-01 18:05:30,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:05:30,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:05:30,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:05:30,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:05:30,150 INFO L87 Difference]: Start difference. First operand 368 states and 781 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:05:31,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:05:31,603 INFO L93 Difference]: Finished difference Result 714 states and 1495 transitions. [2021-06-01 18:05:31,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-01 18:05:31,603 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-01 18:05:31,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:05:31,604 INFO L225 Difference]: With dead ends: 714 [2021-06-01 18:05:31,604 INFO L226 Difference]: Without dead ends: 704 [2021-06-01 18:05:31,604 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1355 ImplicationChecksByTransitivity, 1057.6ms TimeCoverageRelationStatistics Valid=1023, Invalid=4233, Unknown=0, NotChecked=0, Total=5256 [2021-06-01 18:05:31,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2021-06-01 18:05:31,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 355. [2021-06-01 18:05:31,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 2.132768361581921) internal successors, (755), 354 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:05:31,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 755 transitions. [2021-06-01 18:05:31,609 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 755 transitions. Word has length 25 [2021-06-01 18:05:31,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:05:31,609 INFO L482 AbstractCegarLoop]: Abstraction has 355 states and 755 transitions. [2021-06-01 18:05:31,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:05:31,609 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 755 transitions. [2021-06-01 18:05:31,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-01 18:05:31,609 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:05:31,609 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:05:31,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-06-01 18:05:31,819 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:05:31,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:05:31,819 INFO L82 PathProgramCache]: Analyzing trace with hash -19091466, now seen corresponding path program 71 times [2021-06-01 18:05:31,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:05:31,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608280164] [2021-06-01 18:05:31,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:05:31,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:05:31,855 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:05:31,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:05:31,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608280164] [2021-06-01 18:05:31,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608280164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:05:31,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491627402] [2021-06-01 18:05:31,855 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-01 18:05:31,877 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-01 18:05:31,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:05:31,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-01 18:05:31,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:05:31,954 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:05:31,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491627402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:05:31,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 18:05:31,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-01 18:05:31,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875533148] [2021-06-01 18:05:31,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 18:05:31,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 18:05:31,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 18:05:31,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-06-01 18:05:31,955 INFO L87 Difference]: Start difference. First operand 355 states and 755 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:05:32,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 18:05:32,399 INFO L93 Difference]: Finished difference Result 532 states and 1030 transitions. [2021-06-01 18:05:32,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-01 18:05:32,399 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-01 18:05:32,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 18:05:32,400 INFO L225 Difference]: With dead ends: 532 [2021-06-01 18:05:32,400 INFO L226 Difference]: Without dead ends: 518 [2021-06-01 18:05:32,400 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 370.7ms TimeCoverageRelationStatistics Valid=311, Invalid=1495, Unknown=0, NotChecked=0, Total=1806 [2021-06-01 18:05:32,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-06-01 18:05:32,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 355. [2021-06-01 18:05:32,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 2.121468926553672) internal successors, (751), 354 states have internal predecessors, (751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:05:32,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 751 transitions. [2021-06-01 18:05:32,404 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 751 transitions. Word has length 25 [2021-06-01 18:05:32,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 18:05:32,404 INFO L482 AbstractCegarLoop]: Abstraction has 355 states and 751 transitions. [2021-06-01 18:05:32,404 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 18:05:32,404 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 751 transitions. [2021-06-01 18:05:32,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-01 18:05:32,404 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 18:05:32,404 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 18:05:32,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:05:32,605 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 18:05:32,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 18:05:32,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1769779472, now seen corresponding path program 72 times [2021-06-01 18:05:32,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 18:05:32,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145929924] [2021-06-01 18:05:32,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 18:05:32,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 18:05:32,639 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 18:05:32,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 18:05:32,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145929924] [2021-06-01 18:05:32,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145929924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 18:05:32,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018480085] [2021-06-01 18:05:32,640 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 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 [2021-06-01 18:05:32,660 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-01 18:05:32,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 18:05:32,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-01 18:05:32,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2021-06-01 18:18:39,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 18:18:39,827 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-01 18:18:39,829 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-01 18:18:39,830 WARN L196 ceAbstractionStarter]: Timeout [2021-06-01 18:18:39,830 INFO L202 PluginConnector]: Adding new model exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.06 06:18:39 BasicIcfg [2021-06-01 18:18:39,830 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-01 18:18:39,831 INFO L168 Benchmark]: Toolchain (without parser) took 847902.81 ms. Allocated memory was 356.5 MB in the beginning and 908.1 MB in the end (delta: 551.6 MB). Free memory was 336.3 MB in the beginning and 616.1 MB in the end (delta: -279.8 MB). Peak memory consumption was 930.4 MB. Max. memory is 16.0 GB. [2021-06-01 18:18:39,831 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 356.5 MB. Free memory was 337.4 MB in the beginning and 337.3 MB in the end (delta: 70.4 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-01 18:18:39,831 INFO L168 Benchmark]: Boogie Procedure Inliner took 17.91 ms. Allocated memory is still 356.5 MB. Free memory was 336.2 MB in the beginning and 334.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-01 18:18:39,831 INFO L168 Benchmark]: Boogie Preprocessor took 9.97 ms. Allocated memory is still 356.5 MB. Free memory was 334.8 MB in the beginning and 333.9 MB in the end (delta: 890.0 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-01 18:18:39,831 INFO L168 Benchmark]: RCFGBuilder took 179.58 ms. Allocated memory is still 356.5 MB. Free memory was 333.8 MB in the beginning and 324.1 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-06-01 18:18:39,831 INFO L168 Benchmark]: TraceAbstraction took 847687.68 ms. Allocated memory was 356.5 MB in the beginning and 908.1 MB in the end (delta: 551.6 MB). Free memory was 323.7 MB in the beginning and 616.1 MB in the end (delta: -292.4 MB). Peak memory consumption was 917.8 MB. Max. memory is 16.0 GB. [2021-06-01 18:18:39,831 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 356.5 MB. Free memory was 337.4 MB in the beginning and 337.3 MB in the end (delta: 70.4 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 17.91 ms. Allocated memory is still 356.5 MB. Free memory was 336.2 MB in the beginning and 334.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 9.97 ms. Allocated memory is still 356.5 MB. Free memory was 334.8 MB in the beginning and 333.9 MB in the end (delta: 890.0 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 179.58 ms. Allocated memory is still 356.5 MB. Free memory was 333.8 MB in the beginning and 324.1 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 847687.68 ms. Allocated memory was 356.5 MB in the beginning and 908.1 MB in the end (delta: 551.6 MB). Free memory was 323.7 MB in the beginning and 616.1 MB in the end (delta: -292.4 MB). Peak memory consumption was 917.8 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 38]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 28 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while QuantifierPusher was running 441 iterations of DualJunctionQuantifierElimination. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 28 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 847609.8ms, OverallIterations: 76, TraceHistogramMax: 4, EmptinessCheckTime: 44.8ms, AutomataDifference: 34529.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 29.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2402 SDtfs, 8340 SDslu, 13639 SDs, 0 SdLazy, 25653 SolverSat, 1666 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 11765.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3731 GetRequests, 1218 SyntacticMatches, 152 SemanticMatches, 2361 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32165 ImplicationChecksByTransitivity, 23379.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=480occurred in iteration=51, InterpolantAutomatonStates: 2266, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 381.9ms AutomataMinimizationTime, 75 MinimizatonAttempts, 16752 StatesRemovedByMinimization, 75 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 147.9ms SsaConstructionTime, 508.4ms SatisfiabilityAnalysisTime, 8231.7ms InterpolantComputationTime, 3186 NumberOfCodeBlocks, 3186 NumberOfCodeBlocksAsserted, 280 NumberOfCheckSat, 3040 ConstructedInterpolants, 0 QuantifiedInterpolants, 16506 SizeOfPredicates, 203 NumberOfNonLiveVariables, 2812 ConjunctsInSsa, 581 ConjunctsInUnsatCore, 146 InterpolantComputations, 4 PerfectInterpolantSequences, 648/2422 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