/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-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/chromosome-subst.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-770125f [2021-05-22 02:20:41,756 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-22 02:20:41,758 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-22 02:20:41,781 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-22 02:20:41,814 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-Separate.epf [2021-05-22 02:20:41,832 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-22 02:20:41,832 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-22 02:20:41,833 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-22 02:20:41,833 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-22 02:20:41,834 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-22 02:20:41,834 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-22 02:20:41,834 INFO L138 SettingsManager]: * Use SBE=true [2021-05-22 02:20:41,834 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-22 02:20:41,835 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-22 02:20:41,835 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-22 02:20:41,835 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-22 02:20:41,835 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-22 02:20:41,835 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-22 02:20:41,836 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-22 02:20:41,836 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-22 02:20:41,836 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-22 02:20:41,836 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-22 02:20:41,836 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-22 02:20:41,837 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-22 02:20:41,837 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-22 02:20:41,837 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-22 02:20:41,837 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-22 02:20:41,837 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-22 02:20:41,838 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-22 02:20:41,838 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-22 02:20:41,838 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-22 02:20:41,838 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-22 02:20:41,838 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-22 02:20:41,839 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-22 02:20:41,839 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-22 02:20:41,839 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-22 02:20:41,839 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-05-22 02:20:41,839 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-22 02:20:42,173 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-22 02:20:42,197 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-22 02:20:42,199 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-22 02:20:42,201 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-22 02:20:42,202 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-22 02:20:42,203 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/chromosome-subst.wvr.bpl [2021-05-22 02:20:42,203 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/chromosome-subst.wvr.bpl' [2021-05-22 02:20:42,246 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-22 02:20:42,248 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-22 02:20:42,250 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-22 02:20:42,250 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-22 02:20:42,250 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-22 02:20:42,261 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:20:42" (1/1) ... [2021-05-22 02:20:42,269 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:20:42" (1/1) ... [2021-05-22 02:20:42,276 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-22 02:20:42,278 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-22 02:20:42,279 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-22 02:20:42,279 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-22 02:20:42,285 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:20:42" (1/1) ... [2021-05-22 02:20:42,286 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:20:42" (1/1) ... [2021-05-22 02:20:42,294 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:20:42" (1/1) ... [2021-05-22 02:20:42,294 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:20:42" (1/1) ... [2021-05-22 02:20:42,300 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:20:42" (1/1) ... [2021-05-22 02:20:42,303 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:20:42" (1/1) ... [2021-05-22 02:20:42,304 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:20:42" (1/1) ... [2021-05-22 02:20:42,308 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-22 02:20:42,310 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-22 02:20:42,311 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-22 02:20:42,312 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-22 02:20:42,313 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:20:42" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-22 02:20:42,389 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-22 02:20:42,390 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-22 02:20:42,390 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-22 02:20:42,390 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-22 02:20:42,390 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-22 02:20:42,390 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-22 02:20:42,391 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-22 02:20:42,391 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-22 02:20:42,391 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-22 02:20:42,391 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-05-22 02:20:42,391 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-05-22 02:20:42,391 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-05-22 02:20:42,392 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-22 02:20:42,742 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-22 02:20:42,742 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-22 02:20:42,744 INFO L202 PluginConnector]: Adding new model chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.05 02:20:42 BoogieIcfgContainer [2021-05-22 02:20:42,744 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-22 02:20:42,745 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-22 02:20:42,745 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-22 02:20:42,748 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-22 02:20:42,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:20:42" (1/2) ... [2021-05-22 02:20:42,749 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4502b2d9 and model type chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.05 02:20:42, skipping insertion in model container [2021-05-22 02:20:42,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.05 02:20:42" (2/2) ... [2021-05-22 02:20:42,750 INFO L111 eAbstractionObserver]: Analyzing ICFG chromosome-subst.wvr.bpl [2021-05-22 02:20:42,756 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-22 02:20:42,756 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-22 02:20:42,756 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-05-22 02:20:42,757 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-22 02:20:42,808 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-05-22 02:20:42,838 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-22 02:20:42,869 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-22 02:20:42,870 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-22 02:20:42,870 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-22 02:20:42,870 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-22 02:20:42,870 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-22 02:20:42,871 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-22 02:20:42,871 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-22 02:20:42,871 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-22 02:20:42,881 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 25 transitions, 74 flow [2021-05-22 02:20:42,907 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 110 states, 108 states have (on average 2.8703703703703702) internal successors, (310), 109 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:42,909 INFO L276 IsEmpty]: Start isEmpty. Operand has 110 states, 108 states have (on average 2.8703703703703702) internal successors, (310), 109 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:42,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:20:42,922 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:20:42,923 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:20:42,923 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:20:42,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:20:42,930 INFO L82 PathProgramCache]: Analyzing trace with hash 480470199, now seen corresponding path program 1 times [2021-05-22 02:20:42,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:20:42,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712886715] [2021-05-22 02:20:42,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:20:43,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:20:43,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:20:43,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:20:43,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712886715] [2021-05-22 02:20:43,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712886715] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:20:43,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:20:43,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 02:20:43,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37818389] [2021-05-22 02:20:43,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:20:43,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:20:43,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:20:43,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:20:43,167 INFO L87 Difference]: Start difference. First operand has 110 states, 108 states have (on average 2.8703703703703702) internal successors, (310), 109 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:43,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:20:43,222 INFO L93 Difference]: Finished difference Result 248 states and 694 transitions. [2021-05-22 02:20:43,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-22 02:20:43,224 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:20:43,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:20:43,239 INFO L225 Difference]: With dead ends: 248 [2021-05-22 02:20:43,240 INFO L226 Difference]: Without dead ends: 248 [2021-05-22 02:20:43,242 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:20:43,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-05-22 02:20:43,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 129. [2021-05-22 02:20:43,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.9609375) internal successors, (379), 128 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:43,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 379 transitions. [2021-05-22 02:20:43,310 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 379 transitions. Word has length 17 [2021-05-22 02:20:43,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:20:43,311 INFO L482 AbstractCegarLoop]: Abstraction has 129 states and 379 transitions. [2021-05-22 02:20:43,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:43,312 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 379 transitions. [2021-05-22 02:20:43,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:20:43,314 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:20:43,315 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:20:43,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-22 02:20:43,315 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:20:43,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:20:43,319 INFO L82 PathProgramCache]: Analyzing trace with hash 2011052617, now seen corresponding path program 2 times [2021-05-22 02:20:43,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:20:43,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379929476] [2021-05-22 02:20:43,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:20:43,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:20:43,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:20:43,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:20:43,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379929476] [2021-05-22 02:20:43,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379929476] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:20:43,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:20:43,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 02:20:43,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892973348] [2021-05-22 02:20:43,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:20:43,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:20:43,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:20:43,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:20:43,376 INFO L87 Difference]: Start difference. First operand 129 states and 379 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:43,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:20:43,400 INFO L93 Difference]: Finished difference Result 206 states and 576 transitions. [2021-05-22 02:20:43,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-22 02:20:43,401 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:20:43,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:20:43,404 INFO L225 Difference]: With dead ends: 206 [2021-05-22 02:20:43,404 INFO L226 Difference]: Without dead ends: 183 [2021-05-22 02:20:43,405 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:20:43,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-05-22 02:20:43,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 129. [2021-05-22 02:20:43,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.890625) internal successors, (370), 128 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:43,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 370 transitions. [2021-05-22 02:20:43,425 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 370 transitions. Word has length 17 [2021-05-22 02:20:43,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:20:43,426 INFO L482 AbstractCegarLoop]: Abstraction has 129 states and 370 transitions. [2021-05-22 02:20:43,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:43,426 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 370 transitions. [2021-05-22 02:20:43,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:20:43,430 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:20:43,431 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:20:43,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-22 02:20:43,432 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:20:43,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:20:43,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1571987321, now seen corresponding path program 3 times [2021-05-22 02:20:43,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:20:43,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128010905] [2021-05-22 02:20:43,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:20:43,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:20:43,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:20:43,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:20:43,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128010905] [2021-05-22 02:20:43,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128010905] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:20:43,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:20:43,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 02:20:43,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765381749] [2021-05-22 02:20:43,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:20:43,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:20:43,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:20:43,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:20:43,485 INFO L87 Difference]: Start difference. First operand 129 states and 370 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:43,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:20:43,513 INFO L93 Difference]: Finished difference Result 141 states and 406 transitions. [2021-05-22 02:20:43,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-22 02:20:43,514 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:20:43,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:20:43,518 INFO L225 Difference]: With dead ends: 141 [2021-05-22 02:20:43,518 INFO L226 Difference]: Without dead ends: 141 [2021-05-22 02:20:43,519 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:20:43,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-05-22 02:20:43,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 129. [2021-05-22 02:20:43,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.890625) internal successors, (370), 128 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:43,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 370 transitions. [2021-05-22 02:20:43,533 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 370 transitions. Word has length 17 [2021-05-22 02:20:43,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:20:43,533 INFO L482 AbstractCegarLoop]: Abstraction has 129 states and 370 transitions. [2021-05-22 02:20:43,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:43,533 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 370 transitions. [2021-05-22 02:20:43,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:20:43,535 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:20:43,536 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:20:43,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-22 02:20:43,536 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:20:43,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:20:43,537 INFO L82 PathProgramCache]: Analyzing trace with hash -2134989050, now seen corresponding path program 1 times [2021-05-22 02:20:43,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:20:43,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904824866] [2021-05-22 02:20:43,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:20:43,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:20:43,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:20:43,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:20:43,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904824866] [2021-05-22 02:20:43,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904824866] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:20:43,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:20:43,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-22 02:20:43,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712490696] [2021-05-22 02:20:43,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 02:20:43,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:20:43,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 02:20:43,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:20:43,658 INFO L87 Difference]: Start difference. First operand 129 states and 370 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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) [2021-05-22 02:20:43,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:20:43,757 INFO L93 Difference]: Finished difference Result 265 states and 764 transitions. [2021-05-22 02:20:43,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-22 02:20:43,757 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:20:43,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:20:43,759 INFO L225 Difference]: With dead ends: 265 [2021-05-22 02:20:43,759 INFO L226 Difference]: Without dead ends: 238 [2021-05-22 02:20:43,759 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 37.8ms TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:20:43,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-05-22 02:20:43,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 178. [2021-05-22 02:20:43,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.9152542372881354) internal successors, (516), 177 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:43,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 516 transitions. [2021-05-22 02:20:43,765 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 516 transitions. Word has length 18 [2021-05-22 02:20:43,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:20:43,766 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 516 transitions. [2021-05-22 02:20:43,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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) [2021-05-22 02:20:43,766 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 516 transitions. [2021-05-22 02:20:43,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:20:43,767 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:20:43,767 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:20:43,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-22 02:20:43,767 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:20:43,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:20:43,767 INFO L82 PathProgramCache]: Analyzing trace with hash -2040272752, now seen corresponding path program 2 times [2021-05-22 02:20:43,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:20:43,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578771127] [2021-05-22 02:20:43,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:20:43,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:20:43,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:20:43,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:20:43,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578771127] [2021-05-22 02:20:43,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578771127] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:20:43,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:20:43,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-22 02:20:43,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153747798] [2021-05-22 02:20:43,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 02:20:43,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:20:43,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 02:20:43,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:20:43,906 INFO L87 Difference]: Start difference. First operand 178 states and 516 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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) [2021-05-22 02:20:44,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:20:44,033 INFO L93 Difference]: Finished difference Result 372 states and 1056 transitions. [2021-05-22 02:20:44,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:20:44,034 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:20:44,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:20:44,036 INFO L225 Difference]: With dead ends: 372 [2021-05-22 02:20:44,036 INFO L226 Difference]: Without dead ends: 345 [2021-05-22 02:20:44,036 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 123.9ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:20:44,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-05-22 02:20:44,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 195. [2021-05-22 02:20:44,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 3.0412371134020617) internal successors, (590), 194 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:44,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 590 transitions. [2021-05-22 02:20:44,047 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 590 transitions. Word has length 18 [2021-05-22 02:20:44,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:20:44,047 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 590 transitions. [2021-05-22 02:20:44,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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) [2021-05-22 02:20:44,047 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 590 transitions. [2021-05-22 02:20:44,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:20:44,048 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:20:44,048 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:20:44,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-22 02:20:44,048 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:20:44,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:20:44,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1165937426, now seen corresponding path program 3 times [2021-05-22 02:20:44,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:20:44,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821473485] [2021-05-22 02:20:44,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:20:44,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:20:44,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:20:44,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:20:44,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821473485] [2021-05-22 02:20:44,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821473485] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:20:44,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:20:44,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-22 02:20:44,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555590801] [2021-05-22 02:20:44,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 02:20:44,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:20:44,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 02:20:44,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:20:44,152 INFO L87 Difference]: Start difference. First operand 195 states and 590 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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) [2021-05-22 02:20:44,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:20:44,273 INFO L93 Difference]: Finished difference Result 372 states and 1031 transitions. [2021-05-22 02:20:44,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:20:44,273 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:20:44,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:20:44,276 INFO L225 Difference]: With dead ends: 372 [2021-05-22 02:20:44,276 INFO L226 Difference]: Without dead ends: 332 [2021-05-22 02:20:44,276 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 110.1ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:20:44,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-05-22 02:20:44,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 195. [2021-05-22 02:20:44,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 3.0103092783505154) internal successors, (584), 194 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:44,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 584 transitions. [2021-05-22 02:20:44,289 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 584 transitions. Word has length 18 [2021-05-22 02:20:44,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:20:44,289 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 584 transitions. [2021-05-22 02:20:44,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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) [2021-05-22 02:20:44,290 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 584 transitions. [2021-05-22 02:20:44,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:20:44,291 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:20:44,291 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:20:44,291 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-22 02:20:44,291 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:20:44,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:20:44,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1639624874, now seen corresponding path program 4 times [2021-05-22 02:20:44,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:20:44,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561819720] [2021-05-22 02:20:44,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:20:44,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:20:44,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:20:44,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:20:44,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561819720] [2021-05-22 02:20:44,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561819720] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:20:44,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:20:44,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-22 02:20:44,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481041532] [2021-05-22 02:20:44,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 02:20:44,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:20:44,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 02:20:44,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:20:44,392 INFO L87 Difference]: Start difference. First operand 195 states and 584 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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) [2021-05-22 02:20:44,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:20:44,475 INFO L93 Difference]: Finished difference Result 318 states and 896 transitions. [2021-05-22 02:20:44,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:20:44,475 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:20:44,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:20:44,479 INFO L225 Difference]: With dead ends: 318 [2021-05-22 02:20:44,479 INFO L226 Difference]: Without dead ends: 255 [2021-05-22 02:20:44,479 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 80.5ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:20:44,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-05-22 02:20:44,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 195. [2021-05-22 02:20:44,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.9536082474226806) internal successors, (573), 194 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:44,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 573 transitions. [2021-05-22 02:20:44,486 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 573 transitions. Word has length 18 [2021-05-22 02:20:44,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:20:44,486 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 573 transitions. [2021-05-22 02:20:44,486 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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) [2021-05-22 02:20:44,486 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 573 transitions. [2021-05-22 02:20:44,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:20:44,487 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:20:44,487 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:20:44,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-22 02:20:44,488 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:20:44,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:20:44,488 INFO L82 PathProgramCache]: Analyzing trace with hash 479941677, now seen corresponding path program 1 times [2021-05-22 02:20:44,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:20:44,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737199693] [2021-05-22 02:20:44,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:20:44,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:20:44,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:20:44,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:20:44,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737199693] [2021-05-22 02:20:44,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737199693] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:20:44,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:20:44,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:20:44,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359340179] [2021-05-22 02:20:44,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:20:44,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:20:44,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:20:44,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:20:44,534 INFO L87 Difference]: Start difference. First operand 195 states and 573 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:44,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:20:44,560 INFO L93 Difference]: Finished difference Result 291 states and 852 transitions. [2021-05-22 02:20:44,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:20:44,560 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:20:44,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:20:44,562 INFO L225 Difference]: With dead ends: 291 [2021-05-22 02:20:44,563 INFO L226 Difference]: Without dead ends: 291 [2021-05-22 02:20:44,565 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 16.0ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:20:44,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-05-22 02:20:44,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 183. [2021-05-22 02:20:44,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.9835164835164836) internal successors, (543), 182 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:44,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 543 transitions. [2021-05-22 02:20:44,574 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 543 transitions. Word has length 19 [2021-05-22 02:20:44,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:20:44,574 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 543 transitions. [2021-05-22 02:20:44,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:44,574 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 543 transitions. [2021-05-22 02:20:44,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:20:44,575 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:20:44,575 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:20:44,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-22 02:20:44,575 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:20:44,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:20:44,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1607604885, now seen corresponding path program 1 times [2021-05-22 02:20:44,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:20:44,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814237754] [2021-05-22 02:20:44,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:20:44,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:20:44,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:20:44,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:20:44,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814237754] [2021-05-22 02:20:44,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814237754] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:20:44,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:20:44,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:20:44,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685680660] [2021-05-22 02:20:44,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:20:44,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:20:44,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:20:44,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:20:44,614 INFO L87 Difference]: Start difference. First operand 183 states and 543 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:44,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:20:44,645 INFO L93 Difference]: Finished difference Result 285 states and 816 transitions. [2021-05-22 02:20:44,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:20:44,646 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:20:44,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:20:44,648 INFO L225 Difference]: With dead ends: 285 [2021-05-22 02:20:44,649 INFO L226 Difference]: Without dead ends: 261 [2021-05-22 02:20:44,649 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 15.9ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:20:44,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-05-22 02:20:44,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 183. [2021-05-22 02:20:44,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.9505494505494507) internal successors, (537), 182 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:44,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 537 transitions. [2021-05-22 02:20:44,655 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 537 transitions. Word has length 19 [2021-05-22 02:20:44,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:20:44,656 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 537 transitions. [2021-05-22 02:20:44,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:44,656 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 537 transitions. [2021-05-22 02:20:44,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:20:44,657 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:20:44,657 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:20:44,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-05-22 02:20:44,657 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:20:44,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:20:44,657 INFO L82 PathProgramCache]: Analyzing trace with hash -727237863, now seen corresponding path program 2 times [2021-05-22 02:20:44,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:20:44,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813815252] [2021-05-22 02:20:44,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:20:44,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:20:44,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:20:44,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:20:44,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813815252] [2021-05-22 02:20:44,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813815252] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:20:44,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:20:44,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:20:44,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403674658] [2021-05-22 02:20:44,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:20:44,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:20:44,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:20:44,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:20:44,704 INFO L87 Difference]: Start difference. First operand 183 states and 537 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:44,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:20:44,749 INFO L93 Difference]: Finished difference Result 279 states and 798 transitions. [2021-05-22 02:20:44,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:20:44,750 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:20:44,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:20:44,752 INFO L225 Difference]: With dead ends: 279 [2021-05-22 02:20:44,752 INFO L226 Difference]: Without dead ends: 279 [2021-05-22 02:20:44,752 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.7ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:20:44,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-05-22 02:20:44,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 183. [2021-05-22 02:20:44,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.9505494505494507) internal successors, (537), 182 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:44,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 537 transitions. [2021-05-22 02:20:44,773 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 537 transitions. Word has length 19 [2021-05-22 02:20:44,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:20:44,774 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 537 transitions. [2021-05-22 02:20:44,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:44,774 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 537 transitions. [2021-05-22 02:20:44,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:20:44,774 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:20:44,774 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:20:44,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-05-22 02:20:44,775 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:20:44,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:20:44,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1821936781, now seen corresponding path program 2 times [2021-05-22 02:20:44,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:20:44,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959331606] [2021-05-22 02:20:44,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:20:44,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:20:44,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:20:44,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:20:44,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959331606] [2021-05-22 02:20:44,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959331606] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:20:44,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:20:44,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:20:44,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017269456] [2021-05-22 02:20:44,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:20:44,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:20:44,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:20:44,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:20:44,823 INFO L87 Difference]: Start difference. First operand 183 states and 537 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:44,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:20:44,874 INFO L93 Difference]: Finished difference Result 333 states and 939 transitions. [2021-05-22 02:20:44,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:20:44,874 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:20:44,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:20:44,876 INFO L225 Difference]: With dead ends: 333 [2021-05-22 02:20:44,876 INFO L226 Difference]: Without dead ends: 321 [2021-05-22 02:20:44,877 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.3ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:20:44,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-05-22 02:20:44,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 201. [2021-05-22 02:20:44,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.955) internal successors, (591), 200 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:44,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 591 transitions. [2021-05-22 02:20:44,883 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 591 transitions. Word has length 19 [2021-05-22 02:20:44,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:20:44,884 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 591 transitions. [2021-05-22 02:20:44,884 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:44,884 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 591 transitions. [2021-05-22 02:20:44,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:20:44,885 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:20:44,885 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:20:44,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-05-22 02:20:44,886 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:20:44,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:20:44,886 INFO L82 PathProgramCache]: Analyzing trace with hash -2087354603, now seen corresponding path program 3 times [2021-05-22 02:20:44,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:20:44,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631776679] [2021-05-22 02:20:44,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:20:44,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:20:44,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:20:44,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:20:44,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631776679] [2021-05-22 02:20:44,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631776679] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:20:44,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:20:44,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:20:44,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2288780] [2021-05-22 02:20:44,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:20:44,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:20:44,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:20:44,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:20:44,927 INFO L87 Difference]: Start difference. First operand 201 states and 591 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:44,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:20:44,959 INFO L93 Difference]: Finished difference Result 280 states and 812 transitions. [2021-05-22 02:20:44,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:20:44,959 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:20:44,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:20:44,961 INFO L225 Difference]: With dead ends: 280 [2021-05-22 02:20:44,961 INFO L226 Difference]: Without dead ends: 280 [2021-05-22 02:20:44,962 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.6ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:20:44,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-05-22 02:20:44,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 189. [2021-05-22 02:20:44,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.952127659574468) internal successors, (555), 188 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:44,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 555 transitions. [2021-05-22 02:20:44,969 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 555 transitions. Word has length 19 [2021-05-22 02:20:44,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:20:44,969 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 555 transitions. [2021-05-22 02:20:44,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:44,969 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 555 transitions. [2021-05-22 02:20:44,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:20:44,970 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:20:44,970 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:20:44,970 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-05-22 02:20:44,970 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:20:44,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:20:44,971 INFO L82 PathProgramCache]: Analyzing trace with hash -2087010031, now seen corresponding path program 3 times [2021-05-22 02:20:44,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:20:44,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262644877] [2021-05-22 02:20:44,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:20:44,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:20:45,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:20:45,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:20:45,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262644877] [2021-05-22 02:20:45,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262644877] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:20:45,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:20:45,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:20:45,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431848025] [2021-05-22 02:20:45,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:20:45,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:20:45,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:20:45,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:20:45,006 INFO L87 Difference]: Start difference. First operand 189 states and 555 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:45,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:20:45,037 INFO L93 Difference]: Finished difference Result 220 states and 628 transitions. [2021-05-22 02:20:45,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:20:45,037 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:20:45,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:20:45,039 INFO L225 Difference]: With dead ends: 220 [2021-05-22 02:20:45,039 INFO L226 Difference]: Without dead ends: 207 [2021-05-22 02:20:45,039 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.8ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:20:45,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-05-22 02:20:45,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 189. [2021-05-22 02:20:45,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.9202127659574466) internal successors, (549), 188 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:45,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 549 transitions. [2021-05-22 02:20:45,044 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 549 transitions. Word has length 19 [2021-05-22 02:20:45,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:20:45,045 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 549 transitions. [2021-05-22 02:20:45,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:45,045 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 549 transitions. [2021-05-22 02:20:45,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:20:45,047 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:20:45,047 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:20:45,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-05-22 02:20:45,047 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:20:45,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:20:45,048 INFO L82 PathProgramCache]: Analyzing trace with hash 248842827, now seen corresponding path program 4 times [2021-05-22 02:20:45,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:20:45,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868915653] [2021-05-22 02:20:45,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:20:45,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:20:45,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:20:45,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:20:45,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868915653] [2021-05-22 02:20:45,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868915653] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:20:45,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:20:45,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:20:45,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621404981] [2021-05-22 02:20:45,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:20:45,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:20:45,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:20:45,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:20:45,105 INFO L87 Difference]: Start difference. First operand 189 states and 549 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:45,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:20:45,145 INFO L93 Difference]: Finished difference Result 207 states and 591 transitions. [2021-05-22 02:20:45,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:20:45,146 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:20:45,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:20:45,147 INFO L225 Difference]: With dead ends: 207 [2021-05-22 02:20:45,147 INFO L226 Difference]: Without dead ends: 195 [2021-05-22 02:20:45,148 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.8ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:20:45,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-05-22 02:20:45,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2021-05-22 02:20:45,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.922680412371134) internal successors, (567), 194 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:45,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 567 transitions. [2021-05-22 02:20:45,157 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 567 transitions. Word has length 19 [2021-05-22 02:20:45,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:20:45,160 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 567 transitions. [2021-05-22 02:20:45,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:45,160 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 567 transitions. [2021-05-22 02:20:45,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:20:45,160 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:20:45,161 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:20:45,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-05-22 02:20:45,161 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:20:45,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:20:45,161 INFO L82 PathProgramCache]: Analyzing trace with hash -16574995, now seen corresponding path program 5 times [2021-05-22 02:20:45,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:20:45,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877697220] [2021-05-22 02:20:45,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:20:45,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:20:45,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:20:45,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:20:45,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877697220] [2021-05-22 02:20:45,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877697220] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:20:45,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:20:45,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:20:45,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132922781] [2021-05-22 02:20:45,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:20:45,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:20:45,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:20:45,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:20:45,206 INFO L87 Difference]: Start difference. First operand 195 states and 567 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:45,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:20:45,243 INFO L93 Difference]: Finished difference Result 214 states and 623 transitions. [2021-05-22 02:20:45,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:20:45,243 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:20:45,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:20:45,245 INFO L225 Difference]: With dead ends: 214 [2021-05-22 02:20:45,245 INFO L226 Difference]: Without dead ends: 214 [2021-05-22 02:20:45,247 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.5ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:20:45,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-05-22 02:20:45,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 189. [2021-05-22 02:20:45,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.9202127659574466) internal successors, (549), 188 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:45,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 549 transitions. [2021-05-22 02:20:45,253 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 549 transitions. Word has length 19 [2021-05-22 02:20:45,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:20:45,253 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 549 transitions. [2021-05-22 02:20:45,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:45,253 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 549 transitions. [2021-05-22 02:20:45,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:20:45,254 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:20:45,254 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:20:45,254 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-05-22 02:20:45,254 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:20:45,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:20:45,255 INFO L82 PathProgramCache]: Analyzing trace with hash -554430573, now seen corresponding path program 6 times [2021-05-22 02:20:45,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:20:45,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459590672] [2021-05-22 02:20:45,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:20:45,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:20:45,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:20:45,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:20:45,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459590672] [2021-05-22 02:20:45,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459590672] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:20:45,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:20:45,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:20:45,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634883490] [2021-05-22 02:20:45,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:20:45,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:20:45,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:20:45,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:20:45,290 INFO L87 Difference]: Start difference. First operand 189 states and 549 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:45,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:20:45,316 INFO L93 Difference]: Finished difference Result 208 states and 605 transitions. [2021-05-22 02:20:45,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:20:45,316 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:20:45,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:20:45,318 INFO L225 Difference]: With dead ends: 208 [2021-05-22 02:20:45,318 INFO L226 Difference]: Without dead ends: 208 [2021-05-22 02:20:45,318 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.2ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:20:45,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-05-22 02:20:45,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 189. [2021-05-22 02:20:45,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.9202127659574466) internal successors, (549), 188 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:45,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 549 transitions. [2021-05-22 02:20:45,325 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 549 transitions. Word has length 19 [2021-05-22 02:20:45,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:20:45,325 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 549 transitions. [2021-05-22 02:20:45,325 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:45,325 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 549 transitions. [2021-05-22 02:20:45,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:20:45,326 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:20:45,326 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:20:45,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-05-22 02:20:45,326 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:20:45,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:20:45,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1066078798, now seen corresponding path program 1 times [2021-05-22 02:20:45,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:20:45,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731912534] [2021-05-22 02:20:45,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:20:45,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:20:45,390 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-22 02:20:45,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:20:45,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731912534] [2021-05-22 02:20:45,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731912534] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:20:45,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159663788] [2021-05-22 02:20:45,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:20:45,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:20:45,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-22 02:20:45,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:20:45,629 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-22 02:20:45,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159663788] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:20:45,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:20:45,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-05-22 02:20:45,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72930101] [2021-05-22 02:20:45,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 02:20:45,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:20:45,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 02:20:45,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:20:45,630 INFO L87 Difference]: Start difference. First operand 189 states and 549 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:45,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:20:45,676 INFO L93 Difference]: Finished difference Result 313 states and 911 transitions. [2021-05-22 02:20:45,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:20:45,677 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:20:45,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:20:45,678 INFO L225 Difference]: With dead ends: 313 [2021-05-22 02:20:45,678 INFO L226 Difference]: Without dead ends: 220 [2021-05-22 02:20:45,679 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 71.0ms TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:20:45,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-05-22 02:20:45,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 220. [2021-05-22 02:20:45,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.9269406392694064) internal successors, (641), 219 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:45,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 641 transitions. [2021-05-22 02:20:45,689 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 641 transitions. Word has length 20 [2021-05-22 02:20:45,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:20:45,689 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 641 transitions. [2021-05-22 02:20:45,689 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:45,689 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 641 transitions. [2021-05-22 02:20:45,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-22 02:20:45,690 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:20:45,690 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:20:45,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-22 02:20:45,913 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:20:45,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:20:45,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1099695243, now seen corresponding path program 2 times [2021-05-22 02:20:45,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:20:45,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465650175] [2021-05-22 02:20:45,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:20:45,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:20:45,971 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-22 02:20:45,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:20:45,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465650175] [2021-05-22 02:20:45,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465650175] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:20:45,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252541003] [2021-05-22 02:20:45,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:20:46,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:20:46,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:20:46,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-22 02:20:46,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:20:46,146 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-22 02:20:46,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252541003] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:20:46,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:20:46,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-05-22 02:20:46,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874510855] [2021-05-22 02:20:46,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:20:46,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:20:46,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:20:46,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:20:46,148 INFO L87 Difference]: Start difference. First operand 220 states and 641 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:46,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:20:46,224 INFO L93 Difference]: Finished difference Result 344 states and 1003 transitions. [2021-05-22 02:20:46,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:20:46,224 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-22 02:20:46,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:20:46,226 INFO L225 Difference]: With dead ends: 344 [2021-05-22 02:20:46,226 INFO L226 Difference]: Without dead ends: 251 [2021-05-22 02:20:46,226 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 104.6ms TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:20:46,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-05-22 02:20:46,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 251. [2021-05-22 02:20:46,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 2.932) internal successors, (733), 250 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:46,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 733 transitions. [2021-05-22 02:20:46,233 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 733 transitions. Word has length 21 [2021-05-22 02:20:46,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:20:46,233 INFO L482 AbstractCegarLoop]: Abstraction has 251 states and 733 transitions. [2021-05-22 02:20:46,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:46,233 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 733 transitions. [2021-05-22 02:20:46,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-22 02:20:46,234 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:20:46,234 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:20:46,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-22 02:20:46,449 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:20:46,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:20:46,449 INFO L82 PathProgramCache]: Analyzing trace with hash 2141805038, now seen corresponding path program 3 times [2021-05-22 02:20:46,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:20:46,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296288350] [2021-05-22 02:20:46,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:20:46,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:20:46,512 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:20:46,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:20:46,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296288350] [2021-05-22 02:20:46,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296288350] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:20:46,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572464973] [2021-05-22 02:20:46,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:20:46,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-22 02:20:46,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:20:46,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-22 02:20:46,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:20:46,683 WARN L348 FreeRefinementEngine]: Global settings require throwing the following exception [2021-05-22 02:20:46,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:20:46,898 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.EqualityInformation.getEqinfo(EqualityInformation.java:130) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.XnfDer.derSimple(XnfDer.java:308) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.XnfDer.tryToEliminate_EqInfoBased(XnfDer.java:138) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.XnfDer.tryToEliminate(XnfDer.java:101) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:255) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.tryToEliminate(PartialQuantifierElimination.java:100) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:246) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:440) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:201) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:297) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:190) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:180) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:439) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:374) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:69) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:63) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:371) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:307) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:236) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-05-22 02:20:46,900 INFO L168 Benchmark]: Toolchain (without parser) took 4653.00 ms. Allocated memory was 335.5 MB in the beginning and 436.2 MB in the end (delta: 100.7 MB). Free memory was 315.0 MB in the beginning and 345.0 MB in the end (delta: -30.0 MB). Peak memory consumption was 70.8 MB. Max. memory is 16.0 GB. [2021-05-22 02:20:46,901 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 335.5 MB. Free memory was 316.3 MB in the beginning and 316.2 MB in the end (delta: 70.1 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-22 02:20:46,901 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.93 ms. Allocated memory is still 335.5 MB. Free memory was 315.0 MB in the beginning and 313.5 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-22 02:20:46,901 INFO L168 Benchmark]: Boogie Preprocessor took 30.09 ms. Allocated memory is still 335.5 MB. Free memory was 313.5 MB in the beginning and 312.5 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-22 02:20:46,901 INFO L168 Benchmark]: RCFGBuilder took 433.54 ms. Allocated memory is still 335.5 MB. Free memory was 312.4 MB in the beginning and 314.7 MB in the end (delta: -2.2 MB). Peak memory consumption was 23.6 MB. Max. memory is 16.0 GB. [2021-05-22 02:20:46,901 INFO L168 Benchmark]: TraceAbstraction took 4154.67 ms. Allocated memory was 335.5 MB in the beginning and 436.2 MB in the end (delta: 100.7 MB). Free memory was 314.7 MB in the beginning and 345.0 MB in the end (delta: -30.3 MB). Peak memory consumption was 70.3 MB. Max. memory is 16.0 GB. [2021-05-22 02:20:46,902 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 335.5 MB. Free memory was 316.3 MB in the beginning and 316.2 MB in the end (delta: 70.1 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 26.93 ms. Allocated memory is still 335.5 MB. Free memory was 315.0 MB in the beginning and 313.5 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 30.09 ms. Allocated memory is still 335.5 MB. Free memory was 313.5 MB in the beginning and 312.5 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 433.54 ms. Allocated memory is still 335.5 MB. Free memory was 312.4 MB in the beginning and 314.7 MB in the end (delta: -2.2 MB). Peak memory consumption was 23.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 4154.67 ms. Allocated memory was 335.5 MB in the beginning and 436.2 MB in the end (delta: 100.7 MB). Free memory was 314.7 MB in the beginning and 345.0 MB in the end (delta: -30.3 MB). Peak memory consumption was 70.3 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.EqualityInformation.getEqinfo(EqualityInformation.java:130) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...