/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-proofs/threaded-sum-3-vel.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a865e3bea3ade1065a4c95009cfa501fe03c5538-a865e3b [2021-02-19 20:25:02,664 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-19 20:25:02,665 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-19 20:25:02,699 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-19 20:25:02,746 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-02-19 20:25:02,774 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-19 20:25:02,774 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-19 20:25:02,775 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-02-19 20:25:02,775 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-02-19 20:25:02,778 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-19 20:25:02,778 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-19 20:25:02,778 INFO L138 SettingsManager]: * Use SBE=true [2021-02-19 20:25:02,778 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-19 20:25:02,778 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-19 20:25:02,779 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-19 20:25:02,779 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-19 20:25:02,779 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-19 20:25:02,779 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-19 20:25:02,779 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-19 20:25:02,780 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-19 20:25:02,780 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-19 20:25:02,780 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-19 20:25:02,780 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-19 20:25:02,780 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-19 20:25:02,780 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-19 20:25:02,780 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-19 20:25:02,780 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-19 20:25:02,780 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-19 20:25:02,780 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 20:25:02,781 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-19 20:25:02,781 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-19 20:25:02,781 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-19 20:25:02,781 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-19 20:25:02,781 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-19 20:25:02,781 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-02-19 20:25:02,781 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-19 20:25:02,781 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-19 20:25:03,040 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-19 20:25:03,057 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-19 20:25:03,059 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-19 20:25:03,060 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-02-19 20:25:03,062 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-02-19 20:25:03,063 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-proofs/threaded-sum-3-vel.wvr.bpl [2021-02-19 20:25:03,063 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-proofs/threaded-sum-3-vel.wvr.bpl' [2021-02-19 20:25:03,088 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-19 20:25:03,093 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-19 20:25:03,094 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-02-19 20:25:03,094 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-02-19 20:25:03,094 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-02-19 20:25:03,102 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "threaded-sum-3-vel.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:25:03" (1/1) ... [2021-02-19 20:25:03,107 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "threaded-sum-3-vel.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:25:03" (1/1) ... [2021-02-19 20:25:03,112 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-02-19 20:25:03,113 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-19 20:25:03,113 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-19 20:25:03,113 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-19 20:25:03,118 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "threaded-sum-3-vel.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:25:03" (1/1) ... [2021-02-19 20:25:03,118 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "threaded-sum-3-vel.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:25:03" (1/1) ... [2021-02-19 20:25:03,118 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "threaded-sum-3-vel.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:25:03" (1/1) ... [2021-02-19 20:25:03,118 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "threaded-sum-3-vel.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:25:03" (1/1) ... [2021-02-19 20:25:03,120 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "threaded-sum-3-vel.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:25:03" (1/1) ... [2021-02-19 20:25:03,122 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "threaded-sum-3-vel.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:25:03" (1/1) ... [2021-02-19 20:25:03,122 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "threaded-sum-3-vel.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:25:03" (1/1) ... [2021-02-19 20:25:03,123 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-19 20:25:03,123 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-19 20:25:03,123 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-19 20:25:03,123 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-19 20:25:03,127 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "threaded-sum-3-vel.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:25:03" (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 [2021-02-19 20:25:03,169 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-02-19 20:25:03,169 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-02-19 20:25:03,170 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-02-19 20:25:03,170 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-02-19 20:25:03,170 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-02-19 20:25:03,170 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-02-19 20:25:03,170 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-02-19 20:25:03,170 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-19 20:25:03,171 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-19 20:25:03,171 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-02-19 20:25:03,171 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-02-19 20:25:03,171 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-02-19 20:25:03,173 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-02-19 20:25:03,434 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-19 20:25:03,434 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-19 20:25:03,435 INFO L202 PluginConnector]: Adding new model threaded-sum-3-vel.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 08:25:03 BoogieIcfgContainer [2021-02-19 20:25:03,435 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-19 20:25:03,437 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-19 20:25:03,437 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-19 20:25:03,439 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-19 20:25:03,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "threaded-sum-3-vel.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:25:03" (1/2) ... [2021-02-19 20:25:03,439 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d258a5 and model type threaded-sum-3-vel.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 08:25:03, skipping insertion in model container [2021-02-19 20:25:03,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "threaded-sum-3-vel.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 08:25:03" (2/2) ... [2021-02-19 20:25:03,440 INFO L111 eAbstractionObserver]: Analyzing ICFG threaded-sum-3-vel.wvr.bpl [2021-02-19 20:25:03,447 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-02-19 20:25:03,447 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-19 20:25:03,449 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-19 20:25:03,450 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-02-19 20:25:03,517 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-02-19 20:25:03,544 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-02-19 20:25:03,587 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-19 20:25:03,587 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-19 20:25:03,587 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-19 20:25:03,587 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-19 20:25:03,588 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-19 20:25:03,588 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-19 20:25:03,588 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-19 20:25:03,588 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-19 20:25:03,594 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 40 places, 33 transitions, 90 flow [2021-02-19 20:25:03,615 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 138 states, 136 states have (on average 2.786764705882353) internal successors, (379), 137 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) [2021-02-19 20:25:03,618 INFO L276 IsEmpty]: Start isEmpty. Operand has 138 states, 136 states have (on average 2.786764705882353) internal successors, (379), 137 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) [2021-02-19 20:25:03,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 20:25:03,628 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:25:03,629 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:25:03,629 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:25:03,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:25:03,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1037789278, now seen corresponding path program 1 times [2021-02-19 20:25:03,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:25:03,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361761727] [2021-02-19 20:25:03,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:25:03,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:25:03,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:25:03,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361761727] [2021-02-19 20:25:03,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 20:25:03,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 20:25:03,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216177388] [2021-02-19 20:25:03,745 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 20:25:03,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:25:03,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 20:25:03,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 20:25:03,754 INFO L87 Difference]: Start difference. First operand has 138 states, 136 states have (on average 2.786764705882353) internal successors, (379), 137 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) Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:25:03,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:25:03,803 INFO L93 Difference]: Finished difference Result 126 states and 331 transitions. [2021-02-19 20:25:03,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 20:25:03,804 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 20:25:03,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:25:03,812 INFO L225 Difference]: With dead ends: 126 [2021-02-19 20:25:03,812 INFO L226 Difference]: Without dead ends: 126 [2021-02-19 20:25:03,813 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 20:25:03,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-02-19 20:25:03,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2021-02-19 20:25:03,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.648) internal successors, (331), 125 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:25:03,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 331 transitions. [2021-02-19 20:25:03,845 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 331 transitions. Word has length 21 [2021-02-19 20:25:03,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:25:03,845 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 331 transitions. [2021-02-19 20:25:03,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:25:03,845 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 331 transitions. [2021-02-19 20:25:03,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 20:25:03,847 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:25:03,847 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:25:03,847 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-19 20:25:03,847 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:25:03,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:25:03,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1191275523, now seen corresponding path program 1 times [2021-02-19 20:25:03,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:25:03,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892880973] [2021-02-19 20:25:03,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:25:03,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:25:03,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:25:03,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892880973] [2021-02-19 20:25:03,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 20:25:03,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 20:25:03,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601193849] [2021-02-19 20:25:03,878 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 20:25:03,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:25:03,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 20:25:03,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 20:25:03,879 INFO L87 Difference]: Start difference. First operand 126 states and 331 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:25:03,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:25:03,899 INFO L93 Difference]: Finished difference Result 176 states and 475 transitions. [2021-02-19 20:25:03,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 20:25:03,901 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 20:25:03,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:25:03,903 INFO L225 Difference]: With dead ends: 176 [2021-02-19 20:25:03,903 INFO L226 Difference]: Without dead ends: 176 [2021-02-19 20:25:03,904 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 20:25:03,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-02-19 20:25:03,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 151. [2021-02-19 20:25:03,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.6866666666666665) internal successors, (403), 150 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:25:03,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 403 transitions. [2021-02-19 20:25:03,932 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 403 transitions. Word has length 24 [2021-02-19 20:25:03,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:25:03,932 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 403 transitions. [2021-02-19 20:25:03,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:25:03,933 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 403 transitions. [2021-02-19 20:25:03,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 20:25:03,934 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:25:03,934 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:25:03,934 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-19 20:25:03,934 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:25:03,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:25:03,935 INFO L82 PathProgramCache]: Analyzing trace with hash -757745613, now seen corresponding path program 1 times [2021-02-19 20:25:03,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:25:03,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615927171] [2021-02-19 20:25:03,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:25:03,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:25:03,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:25:03,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615927171] [2021-02-19 20:25:03,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 20:25:03,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-19 20:25:03,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426503547] [2021-02-19 20:25:03,976 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 20:25:03,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:25:03,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 20:25:03,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-19 20:25:03,977 INFO L87 Difference]: Start difference. First operand 151 states and 403 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:25:04,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:25:04,034 INFO L93 Difference]: Finished difference Result 223 states and 619 transitions. [2021-02-19 20:25:04,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 20:25:04,035 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 20:25:04,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:25:04,037 INFO L225 Difference]: With dead ends: 223 [2021-02-19 20:25:04,037 INFO L226 Difference]: Without dead ends: 223 [2021-02-19 20:25:04,037 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-02-19 20:25:04,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-02-19 20:25:04,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2021-02-19 20:25:04,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.7882882882882885) internal successors, (619), 222 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:25:04,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 619 transitions. [2021-02-19 20:25:04,057 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 619 transitions. Word has length 26 [2021-02-19 20:25:04,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:25:04,057 INFO L480 AbstractCegarLoop]: Abstraction has 223 states and 619 transitions. [2021-02-19 20:25:04,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:25:04,057 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 619 transitions. [2021-02-19 20:25:04,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 20:25:04,058 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:25:04,059 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:25:04,059 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-19 20:25:04,059 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:25:04,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:25:04,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1825531115, now seen corresponding path program 1 times [2021-02-19 20:25:04,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:25:04,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164828138] [2021-02-19 20:25:04,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:25:04,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:25:04,136 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:25:04,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164828138] [2021-02-19 20:25:04,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 20:25:04,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-19 20:25:04,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873276887] [2021-02-19 20:25:04,138 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 20:25:04,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:25:04,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 20:25:04,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-19 20:25:04,140 INFO L87 Difference]: Start difference. First operand 223 states and 619 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:25:04,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:25:04,181 INFO L93 Difference]: Finished difference Result 344 states and 930 transitions. [2021-02-19 20:25:04,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 20:25:04,182 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 20:25:04,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:25:04,185 INFO L225 Difference]: With dead ends: 344 [2021-02-19 20:25:04,185 INFO L226 Difference]: Without dead ends: 308 [2021-02-19 20:25:04,186 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-02-19 20:25:04,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-02-19 20:25:04,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 235. [2021-02-19 20:25:04,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.8076923076923075) internal successors, (657), 234 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:25:04,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 657 transitions. [2021-02-19 20:25:04,210 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 657 transitions. Word has length 28 [2021-02-19 20:25:04,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:25:04,210 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 657 transitions. [2021-02-19 20:25:04,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:25:04,211 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 657 transitions. [2021-02-19 20:25:04,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 20:25:04,212 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:25:04,212 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:25:04,212 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-19 20:25:04,212 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:25:04,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:25:04,213 INFO L82 PathProgramCache]: Analyzing trace with hash -857622317, now seen corresponding path program 2 times [2021-02-19 20:25:04,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:25:04,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591742075] [2021-02-19 20:25:04,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:25:04,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:25:04,335 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:25:04,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591742075] [2021-02-19 20:25:04,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305404120] [2021-02-19 20:25:04,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 20:25:04,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:25:04,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:25:04,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 20:25:04,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:25:04,815 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:25:04,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:25:04,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 15 [2021-02-19 20:25:04,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838290080] [2021-02-19 20:25:04,817 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 20:25:04,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:25:04,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 20:25:04,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-02-19 20:25:04,820 INFO L87 Difference]: Start difference. First operand 235 states and 657 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:25:05,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:25:05,269 INFO L93 Difference]: Finished difference Result 646 states and 1894 transitions. [2021-02-19 20:25:05,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 20:25:05,269 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 20:25:05,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:25:05,273 INFO L225 Difference]: With dead ends: 646 [2021-02-19 20:25:05,273 INFO L226 Difference]: Without dead ends: 646 [2021-02-19 20:25:05,273 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=223, Invalid=589, Unknown=0, NotChecked=0, Total=812 [2021-02-19 20:25:05,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2021-02-19 20:25:05,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 486. [2021-02-19 20:25:05,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 485 states have (on average 2.9690721649484537) internal successors, (1440), 485 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:25:05,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 1440 transitions. [2021-02-19 20:25:05,290 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 1440 transitions. Word has length 30 [2021-02-19 20:25:05,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:25:05,290 INFO L480 AbstractCegarLoop]: Abstraction has 486 states and 1440 transitions. [2021-02-19 20:25:05,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:25:05,291 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 1440 transitions. [2021-02-19 20:25:05,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 20:25:05,295 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:25:05,295 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:25:05,506 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:25:05,506 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:25:05,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:25:05,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1874044433, now seen corresponding path program 3 times [2021-02-19 20:25:05,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:25:05,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963026554] [2021-02-19 20:25:05,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:25:05,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:25:05,615 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:25:05,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963026554] [2021-02-19 20:25:05,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084983835] [2021-02-19 20:25:05,615 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 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 [2021-02-19 20:25:05,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 20:25:05,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:25:05,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2021-02-19 20:25:05,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:25:05,876 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:25:05,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:25:05,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 15 [2021-02-19 20:25:05,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487493160] [2021-02-19 20:25:05,877 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 20:25:05,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:25:05,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 20:25:05,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-02-19 20:25:05,884 INFO L87 Difference]: Start difference. First operand 486 states and 1440 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:25:06,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:25:06,074 INFO L93 Difference]: Finished difference Result 732 states and 2167 transitions. [2021-02-19 20:25:06,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 20:25:06,074 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 20:25:06,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:25:06,078 INFO L225 Difference]: With dead ends: 732 [2021-02-19 20:25:06,080 INFO L226 Difference]: Without dead ends: 732 [2021-02-19 20:25:06,081 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2021-02-19 20:25:06,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2021-02-19 20:25:06,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 390. [2021-02-19 20:25:06,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 2.879177377892031) internal successors, (1120), 389 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:25:06,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1120 transitions. [2021-02-19 20:25:06,092 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1120 transitions. Word has length 30 [2021-02-19 20:25:06,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:25:06,093 INFO L480 AbstractCegarLoop]: Abstraction has 390 states and 1120 transitions. [2021-02-19 20:25:06,093 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:25:06,097 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1120 transitions. [2021-02-19 20:25:06,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-19 20:25:06,098 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:25:06,098 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:25:06,313 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-02-19 20:25:06,314 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:25:06,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:25:06,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1240349297, now seen corresponding path program 4 times [2021-02-19 20:25:06,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:25:06,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235024495] [2021-02-19 20:25:06,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:25:06,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:25:06,425 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:25:06,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235024495] [2021-02-19 20:25:06,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803151251] [2021-02-19 20:25:06,425 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 20:25:06,460 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:25:06,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:25:06,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 20:25:06,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:25:06,668 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:25:06,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:25:06,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-02-19 20:25:06,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224835486] [2021-02-19 20:25:06,670 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 20:25:06,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:25:06,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 20:25:06,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-02-19 20:25:06,671 INFO L87 Difference]: Start difference. First operand 390 states and 1120 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:25:06,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:25:06,956 INFO L93 Difference]: Finished difference Result 670 states and 1948 transitions. [2021-02-19 20:25:06,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 20:25:06,956 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-02-19 20:25:06,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:25:06,959 INFO L225 Difference]: With dead ends: 670 [2021-02-19 20:25:06,959 INFO L226 Difference]: Without dead ends: 670 [2021-02-19 20:25:06,960 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=204, Invalid=608, Unknown=0, NotChecked=0, Total=812 [2021-02-19 20:25:06,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2021-02-19 20:25:06,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 550. [2021-02-19 20:25:06,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 549 states have (on average 2.9435336976320583) internal successors, (1616), 549 states have internal predecessors, (1616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:25:06,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 1616 transitions. [2021-02-19 20:25:06,971 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 1616 transitions. Word has length 32 [2021-02-19 20:25:06,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:25:06,972 INFO L480 AbstractCegarLoop]: Abstraction has 550 states and 1616 transitions. [2021-02-19 20:25:06,972 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:25:06,972 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 1616 transitions. [2021-02-19 20:25:06,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-19 20:25:06,973 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:25:06,973 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:25:07,194 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-02-19 20:25:07,194 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:25:07,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:25:07,195 INFO L82 PathProgramCache]: Analyzing trace with hash -595701139, now seen corresponding path program 5 times [2021-02-19 20:25:07,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:25:07,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354608781] [2021-02-19 20:25:07,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:25:07,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:25:07,335 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:25:07,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354608781] [2021-02-19 20:25:07,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915287901] [2021-02-19 20:25:07,335 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:25:07,382 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 20:25:07,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:25:07,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 20:25:07,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:25:07,643 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:25:07,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:25:07,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-02-19 20:25:07,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924853514] [2021-02-19 20:25:07,645 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 20:25:07,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:25:07,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 20:25:07,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2021-02-19 20:25:07,646 INFO L87 Difference]: Start difference. First operand 550 states and 1616 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:25:08,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:25:08,375 INFO L93 Difference]: Finished difference Result 1176 states and 3451 transitions. [2021-02-19 20:25:08,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 20:25:08,375 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-02-19 20:25:08,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:25:08,380 INFO L225 Difference]: With dead ends: 1176 [2021-02-19 20:25:08,380 INFO L226 Difference]: Without dead ends: 1176 [2021-02-19 20:25:08,380 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=517, Invalid=1205, Unknown=0, NotChecked=0, Total=1722 [2021-02-19 20:25:08,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1176 states. [2021-02-19 20:25:08,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1176 to 606. [2021-02-19 20:25:08,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 605 states have (on average 2.935537190082645) internal successors, (1776), 605 states have internal predecessors, (1776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:25:08,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 1776 transitions. [2021-02-19 20:25:08,396 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 1776 transitions. Word has length 32 [2021-02-19 20:25:08,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:25:08,396 INFO L480 AbstractCegarLoop]: Abstraction has 606 states and 1776 transitions. [2021-02-19 20:25:08,396 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:25:08,396 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 1776 transitions. [2021-02-19 20:25:08,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-19 20:25:08,397 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:25:08,397 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:25:08,610 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:25:08,612 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:25:08,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:25:08,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1343337903, now seen corresponding path program 6 times [2021-02-19 20:25:08,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:25:08,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796761808] [2021-02-19 20:25:08,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:25:08,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:25:08,732 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:25:08,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796761808] [2021-02-19 20:25:08,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945424399] [2021-02-19 20:25:08,732 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:25:08,759 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 20:25:08,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:25:08,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 11 conjunts are in the unsatisfiable core [2021-02-19 20:25:08,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:25:08,926 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:25:08,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:25:08,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-02-19 20:25:08,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614604388] [2021-02-19 20:25:08,928 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 20:25:08,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:25:08,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 20:25:08,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-02-19 20:25:08,929 INFO L87 Difference]: Start difference. First operand 606 states and 1776 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:25:09,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:25:09,086 INFO L93 Difference]: Finished difference Result 898 states and 2510 transitions. [2021-02-19 20:25:09,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 20:25:09,086 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-02-19 20:25:09,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:25:09,091 INFO L225 Difference]: With dead ends: 898 [2021-02-19 20:25:09,091 INFO L226 Difference]: Without dead ends: 898 [2021-02-19 20:25:09,091 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2021-02-19 20:25:09,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2021-02-19 20:25:09,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 606. [2021-02-19 20:25:09,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 605 states have (on average 2.950413223140496) internal successors, (1785), 605 states have internal predecessors, (1785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:25:09,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 1785 transitions. [2021-02-19 20:25:09,107 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 1785 transitions. Word has length 32 [2021-02-19 20:25:09,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:25:09,107 INFO L480 AbstractCegarLoop]: Abstraction has 606 states and 1785 transitions. [2021-02-19 20:25:09,107 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:25:09,107 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 1785 transitions. [2021-02-19 20:25:09,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:25:09,109 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:25:09,109 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:25:09,318 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:25:09,318 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:25:09,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:25:09,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1243558769, now seen corresponding path program 7 times [2021-02-19 20:25:09,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:25:09,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252801766] [2021-02-19 20:25:09,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:25:09,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:25:09,675 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:25:09,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252801766] [2021-02-19 20:25:09,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013780547] [2021-02-19 20:25:09,675 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:25:09,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:25:09,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 20:25:09,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:25:10,526 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:25:10,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:25:10,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-02-19 20:25:10,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187530411] [2021-02-19 20:25:10,529 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 20:25:10,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:25:10,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 20:25:10,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=952, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 20:25:10,531 INFO L87 Difference]: Start difference. First operand 606 states and 1785 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:25:11,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:25:11,569 INFO L93 Difference]: Finished difference Result 1216 states and 3475 transitions. [2021-02-19 20:25:11,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-02-19 20:25:11,570 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:25:11,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:25:11,575 INFO L225 Difference]: With dead ends: 1216 [2021-02-19 20:25:11,575 INFO L226 Difference]: Without dead ends: 1144 [2021-02-19 20:25:11,576 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=513, Invalid=1839, Unknown=0, NotChecked=0, Total=2352 [2021-02-19 20:25:11,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1144 states. [2021-02-19 20:25:11,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1144 to 806. [2021-02-19 20:25:11,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 805 states have (on average 2.995031055900621) internal successors, (2411), 805 states have internal predecessors, (2411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:25:11,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 2411 transitions. [2021-02-19 20:25:11,595 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 2411 transitions. Word has length 34 [2021-02-19 20:25:11,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:25:11,595 INFO L480 AbstractCegarLoop]: Abstraction has 806 states and 2411 transitions. [2021-02-19 20:25:11,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:25:11,596 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 2411 transitions. [2021-02-19 20:25:11,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:25:11,597 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:25:11,597 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:25:11,815 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:25:11,815 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:25:11,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:25:11,815 INFO L82 PathProgramCache]: Analyzing trace with hash 99319179, now seen corresponding path program 8 times [2021-02-19 20:25:11,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:25:11,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614260236] [2021-02-19 20:25:11,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:25:11,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:25:12,204 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:25:12,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614260236] [2021-02-19 20:25:12,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575884046] [2021-02-19 20:25:12,205 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:25:12,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:25:12,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:25:12,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 20:25:12,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:25:13,065 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2021-02-19 20:25:13,301 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2021-02-19 20:25:13,389 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:25:13,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:25:13,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 33 [2021-02-19 20:25:13,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567630120] [2021-02-19 20:25:13,389 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-02-19 20:25:13,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:25:13,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-02-19 20:25:13,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=916, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 20:25:13,390 INFO L87 Difference]: Start difference. First operand 806 states and 2411 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:25:14,996 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2021-02-19 20:25:15,440 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 64 [2021-02-19 20:25:15,788 WARN L202 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2021-02-19 20:25:16,106 WARN L202 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2021-02-19 20:25:16,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:25:16,596 INFO L93 Difference]: Finished difference Result 2101 states and 5925 transitions. [2021-02-19 20:25:16,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-02-19 20:25:16,596 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:25:16,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:25:16,603 INFO L225 Difference]: With dead ends: 2101 [2021-02-19 20:25:16,603 INFO L226 Difference]: Without dead ends: 1790 [2021-02-19 20:25:16,604 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1227 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=865, Invalid=3965, Unknown=0, NotChecked=0, Total=4830 [2021-02-19 20:25:16,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1790 states. [2021-02-19 20:25:16,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1790 to 940. [2021-02-19 20:25:16,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 939 states have (on average 3.0415335463258786) internal successors, (2856), 939 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:25:16,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 2856 transitions. [2021-02-19 20:25:16,628 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 2856 transitions. Word has length 34 [2021-02-19 20:25:16,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:25:16,628 INFO L480 AbstractCegarLoop]: Abstraction has 940 states and 2856 transitions. [2021-02-19 20:25:16,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:25:16,628 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 2856 transitions. [2021-02-19 20:25:16,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:25:16,630 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:25:16,630 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:25:16,847 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-02-19 20:25:16,848 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:25:16,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:25:16,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1425961677, now seen corresponding path program 9 times [2021-02-19 20:25:16,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:25:16,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080808678] [2021-02-19 20:25:16,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:25:16,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:25:17,139 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:25:17,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080808678] [2021-02-19 20:25:17,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275111286] [2021-02-19 20:25:17,140 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:25:17,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 20:25:17,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:25:17,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 20:25:17,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:25:18,025 WARN L202 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2021-02-19 20:25:18,098 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:25:18,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:25:18,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-02-19 20:25:18,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991253134] [2021-02-19 20:25:18,099 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-02-19 20:25:18,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:25:18,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-02-19 20:25:18,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=843, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 20:25:18,100 INFO L87 Difference]: Start difference. First operand 940 states and 2856 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:25:19,923 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2021-02-19 20:25:20,365 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 73 [2021-02-19 20:25:20,753 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2021-02-19 20:25:21,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:25:21,152 INFO L93 Difference]: Finished difference Result 2730 states and 7924 transitions. [2021-02-19 20:25:21,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-02-19 20:25:21,153 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:25:21,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:25:21,161 INFO L225 Difference]: With dead ends: 2730 [2021-02-19 20:25:21,162 INFO L226 Difference]: Without dead ends: 2410 [2021-02-19 20:25:21,162 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1189 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=857, Invalid=3565, Unknown=0, NotChecked=0, Total=4422 [2021-02-19 20:25:21,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2410 states. [2021-02-19 20:25:21,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2410 to 1090. [2021-02-19 20:25:21,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1090 states, 1089 states have (on average 3.1028466483011936) internal successors, (3379), 1089 states have internal predecessors, (3379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:25:21,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1090 states to 1090 states and 3379 transitions. [2021-02-19 20:25:21,190 INFO L78 Accepts]: Start accepts. Automaton has 1090 states and 3379 transitions. Word has length 34 [2021-02-19 20:25:21,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:25:21,190 INFO L480 AbstractCegarLoop]: Abstraction has 1090 states and 3379 transitions. [2021-02-19 20:25:21,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:25:21,190 INFO L276 IsEmpty]: Start isEmpty. Operand 1090 states and 3379 transitions. [2021-02-19 20:25:21,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:25:21,192 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:25:21,192 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:25:21,406 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-02-19 20:25:21,406 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:25:21,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:25:21,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1840933751, now seen corresponding path program 10 times [2021-02-19 20:25:21,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:25:21,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322536755] [2021-02-19 20:25:21,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:25:21,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:25:21,680 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:25:21,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322536755] [2021-02-19 20:25:21,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223910710] [2021-02-19 20:25:21,680 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:25:21,701 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:25:21,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:25:21,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 20:25:21,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:25:22,628 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:25:22,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:25:22,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-02-19 20:25:22,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411855177] [2021-02-19 20:25:22,629 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 20:25:22,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:25:22,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 20:25:22,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=953, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 20:25:22,630 INFO L87 Difference]: Start difference. First operand 1090 states and 3379 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:25:23,180 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2021-02-19 20:25:23,333 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 68 [2021-02-19 20:25:23,730 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2021-02-19 20:25:23,983 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2021-02-19 20:25:25,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:25:25,046 INFO L93 Difference]: Finished difference Result 2642 states and 7900 transitions. [2021-02-19 20:25:25,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-02-19 20:25:25,046 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:25:25,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:25:25,056 INFO L225 Difference]: With dead ends: 2642 [2021-02-19 20:25:25,056 INFO L226 Difference]: Without dead ends: 2570 [2021-02-19 20:25:25,057 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1033 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=787, Invalid=3119, Unknown=0, NotChecked=0, Total=3906 [2021-02-19 20:25:25,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2570 states. [2021-02-19 20:25:25,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2570 to 1278. [2021-02-19 20:25:25,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1278 states, 1277 states have (on average 3.129992169146437) internal successors, (3997), 1277 states have internal predecessors, (3997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:25:25,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1278 states to 1278 states and 3997 transitions. [2021-02-19 20:25:25,087 INFO L78 Accepts]: Start accepts. Automaton has 1278 states and 3997 transitions. Word has length 34 [2021-02-19 20:25:25,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:25:25,087 INFO L480 AbstractCegarLoop]: Abstraction has 1278 states and 3997 transitions. [2021-02-19 20:25:25,087 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:25:25,087 INFO L276 IsEmpty]: Start isEmpty. Operand 1278 states and 3997 transitions. [2021-02-19 20:25:25,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:25:25,090 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:25:25,090 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:25:25,305 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:25:25,306 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:25:25,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:25:25,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1621746551, now seen corresponding path program 11 times [2021-02-19 20:25:25,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:25:25,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310112484] [2021-02-19 20:25:25,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:25:25,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:25:25,641 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:25:25,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310112484] [2021-02-19 20:25:25,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705933543] [2021-02-19 20:25:25,642 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:25:25,668 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 20:25:25,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:25:25,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 20:25:25,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:25:26,691 WARN L202 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2021-02-19 20:25:26,851 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:25:26,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:25:26,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-02-19 20:25:26,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909987222] [2021-02-19 20:25:26,852 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-02-19 20:25:26,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:25:26,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-02-19 20:25:26,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=1048, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 20:25:26,852 INFO L87 Difference]: Start difference. First operand 1278 states and 3997 transitions. Second operand has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:25:27,615 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 65 [2021-02-19 20:25:28,093 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2021-02-19 20:25:28,238 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 53 [2021-02-19 20:25:28,613 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2021-02-19 20:25:29,352 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2021-02-19 20:25:29,613 WARN L202 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 67 [2021-02-19 20:25:30,133 WARN L202 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 73 [2021-02-19 20:25:30,362 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 37 [2021-02-19 20:25:31,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:25:31,039 INFO L93 Difference]: Finished difference Result 3169 states and 9530 transitions. [2021-02-19 20:25:31,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-02-19 20:25:31,039 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:25:31,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:25:31,051 INFO L225 Difference]: With dead ends: 3169 [2021-02-19 20:25:31,051 INFO L226 Difference]: Without dead ends: 3094 [2021-02-19 20:25:31,052 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1922 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1498, Invalid=4982, Unknown=0, NotChecked=0, Total=6480 [2021-02-19 20:25:31,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3094 states. [2021-02-19 20:25:31,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3094 to 1444. [2021-02-19 20:25:31,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1444 states, 1443 states have (on average 3.1503811503811505) internal successors, (4546), 1443 states have internal predecessors, (4546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:25:31,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1444 states to 1444 states and 4546 transitions. [2021-02-19 20:25:31,088 INFO L78 Accepts]: Start accepts. Automaton has 1444 states and 4546 transitions. Word has length 34 [2021-02-19 20:25:31,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:25:31,088 INFO L480 AbstractCegarLoop]: Abstraction has 1444 states and 4546 transitions. [2021-02-19 20:25:31,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:25:31,088 INFO L276 IsEmpty]: Start isEmpty. Operand 1444 states and 4546 transitions. [2021-02-19 20:25:31,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:25:31,091 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:25:31,091 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:25:31,306 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:25:31,306 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:25:31,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:25:31,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1464662903, now seen corresponding path program 12 times [2021-02-19 20:25:31,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:25:31,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531801833] [2021-02-19 20:25:31,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:25:31,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:25:31,661 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:25:31,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531801833] [2021-02-19 20:25:31,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224720941] [2021-02-19 20:25:31,662 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:25:31,684 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 20:25:31,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:25:31,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 20:25:31,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:25:32,283 WARN L202 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2021-02-19 20:25:32,697 WARN L202 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 66 [2021-02-19 20:25:32,798 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:25:32,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:25:32,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-02-19 20:25:32,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205639163] [2021-02-19 20:25:32,799 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-02-19 20:25:32,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:25:32,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-02-19 20:25:32,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=795, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 20:25:32,800 INFO L87 Difference]: Start difference. First operand 1444 states and 4546 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:25:33,524 WARN L202 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2021-02-19 20:25:33,982 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2021-02-19 20:25:34,280 WARN L202 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 70 [2021-02-19 20:25:34,562 WARN L202 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 72 [2021-02-19 20:25:34,790 WARN L202 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 74 [2021-02-19 20:25:35,306 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 57 [2021-02-19 20:25:35,574 WARN L202 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 79 [2021-02-19 20:25:35,863 WARN L202 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2021-02-19 20:25:36,142 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-02-19 20:25:36,374 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2021-02-19 20:25:36,756 WARN L202 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2021-02-19 20:25:37,016 WARN L202 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 72 [2021-02-19 20:25:37,239 WARN L202 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2021-02-19 20:25:37,408 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-02-19 20:25:37,782 WARN L202 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2021-02-19 20:25:38,143 WARN L202 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 73 [2021-02-19 20:25:38,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:25:38,766 INFO L93 Difference]: Finished difference Result 5680 states and 17200 transitions. [2021-02-19 20:25:38,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-02-19 20:25:38,766 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:25:38,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:25:38,777 INFO L225 Difference]: With dead ends: 5680 [2021-02-19 20:25:38,777 INFO L226 Difference]: Without dead ends: 5267 [2021-02-19 20:25:38,779 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2143 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=1427, Invalid=5379, Unknown=0, NotChecked=0, Total=6806 [2021-02-19 20:25:38,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5267 states. [2021-02-19 20:25:38,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5267 to 1974. [2021-02-19 20:25:38,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1974 states, 1973 states have (on average 3.2179422199695895) internal successors, (6349), 1973 states have internal predecessors, (6349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:25:38,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1974 states to 1974 states and 6349 transitions. [2021-02-19 20:25:38,836 INFO L78 Accepts]: Start accepts. Automaton has 1974 states and 6349 transitions. Word has length 34 [2021-02-19 20:25:38,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:25:38,836 INFO L480 AbstractCegarLoop]: Abstraction has 1974 states and 6349 transitions. [2021-02-19 20:25:38,836 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:25:38,836 INFO L276 IsEmpty]: Start isEmpty. Operand 1974 states and 6349 transitions. [2021-02-19 20:25:38,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:25:38,839 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:25:38,839 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:25:39,054 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable110 [2021-02-19 20:25:39,054 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:25:39,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:25:39,055 INFO L82 PathProgramCache]: Analyzing trace with hash -354547013, now seen corresponding path program 13 times [2021-02-19 20:25:39,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:25:39,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961030582] [2021-02-19 20:25:39,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:25:39,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:25:39,319 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:25:39,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961030582] [2021-02-19 20:25:39,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126630363] [2021-02-19 20:25:39,320 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:25:39,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:25:39,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 20:25:39,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:25:40,088 WARN L202 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 63 [2021-02-19 20:25:40,352 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:25:40,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:25:40,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-02-19 20:25:40,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118629467] [2021-02-19 20:25:40,353 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-02-19 20:25:40,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:25:40,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-02-19 20:25:40,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=805, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 20:25:40,354 INFO L87 Difference]: Start difference. First operand 1974 states and 6349 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:25:40,938 WARN L202 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 73 [2021-02-19 20:25:41,137 WARN L202 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 77 [2021-02-19 20:25:41,541 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2021-02-19 20:25:42,313 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2021-02-19 20:25:42,635 WARN L202 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2021-02-19 20:25:42,933 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 51 [2021-02-19 20:25:43,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:25:43,893 INFO L93 Difference]: Finished difference Result 4874 states and 15152 transitions. [2021-02-19 20:25:43,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-02-19 20:25:43,893 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:25:43,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:25:43,903 INFO L225 Difference]: With dead ends: 4874 [2021-02-19 20:25:43,903 INFO L226 Difference]: Without dead ends: 4593 [2021-02-19 20:25:43,904 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1141 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=955, Invalid=3335, Unknown=0, NotChecked=0, Total=4290 [2021-02-19 20:25:43,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4593 states. [2021-02-19 20:25:43,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4593 to 2277. [2021-02-19 20:25:43,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2277 states, 2276 states have (on average 3.239894551845343) internal successors, (7374), 2276 states have internal predecessors, (7374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:25:43,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2277 states to 2277 states and 7374 transitions. [2021-02-19 20:25:43,953 INFO L78 Accepts]: Start accepts. Automaton has 2277 states and 7374 transitions. Word has length 34 [2021-02-19 20:25:43,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:25:43,953 INFO L480 AbstractCegarLoop]: Abstraction has 2277 states and 7374 transitions. [2021-02-19 20:25:43,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:25:43,954 INFO L276 IsEmpty]: Start isEmpty. Operand 2277 states and 7374 transitions. [2021-02-19 20:25:43,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:25:43,957 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:25:43,957 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:25:44,170 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-02-19 20:25:44,170 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:25:44,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:25:44,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1340297677, now seen corresponding path program 14 times [2021-02-19 20:25:44,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:25:44,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208397842] [2021-02-19 20:25:44,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:25:44,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:25:44,535 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:25:44,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208397842] [2021-02-19 20:25:44,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52658875] [2021-02-19 20:25:44,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:25:44,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:25:44,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:25:44,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 20:25:44,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:25:45,128 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2021-02-19 20:25:45,348 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 55 [2021-02-19 20:25:45,662 WARN L202 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2021-02-19 20:25:45,742 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:25:45,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:25:45,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 33 [2021-02-19 20:25:45,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216964501] [2021-02-19 20:25:45,742 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-02-19 20:25:45,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:25:45,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-02-19 20:25:45,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=933, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 20:25:45,743 INFO L87 Difference]: Start difference. First operand 2277 states and 7374 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:25:46,584 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-02-19 20:25:47,398 WARN L202 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2021-02-19 20:25:47,834 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2021-02-19 20:25:48,157 WARN L202 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-02-19 20:25:48,392 WARN L202 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2021-02-19 20:25:48,710 WARN L202 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 71 [2021-02-19 20:25:49,115 WARN L202 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2021-02-19 20:25:49,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:25:49,582 INFO L93 Difference]: Finished difference Result 3757 states and 11473 transitions. [2021-02-19 20:25:49,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-02-19 20:25:49,583 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:25:49,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:25:49,590 INFO L225 Difference]: With dead ends: 3757 [2021-02-19 20:25:49,590 INFO L226 Difference]: Without dead ends: 3446 [2021-02-19 20:25:49,591 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1368 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=787, Invalid=4183, Unknown=0, NotChecked=0, Total=4970 [2021-02-19 20:25:49,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3446 states. [2021-02-19 20:25:49,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3446 to 2645. [2021-02-19 20:25:49,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2645 states, 2644 states have (on average 3.235627836611195) internal successors, (8555), 2644 states have internal predecessors, (8555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:25:49,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2645 states to 2645 states and 8555 transitions. [2021-02-19 20:25:49,633 INFO L78 Accepts]: Start accepts. Automaton has 2645 states and 8555 transitions. Word has length 34 [2021-02-19 20:25:49,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:25:49,633 INFO L480 AbstractCegarLoop]: Abstraction has 2645 states and 8555 transitions. [2021-02-19 20:25:49,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:25:49,634 INFO L276 IsEmpty]: Start isEmpty. Operand 2645 states and 8555 transitions. [2021-02-19 20:25:49,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:25:49,649 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:25:49,649 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:25:49,866 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2021-02-19 20:25:49,866 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:25:49,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:25:49,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1618219273, now seen corresponding path program 15 times [2021-02-19 20:25:49,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:25:49,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463247468] [2021-02-19 20:25:49,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:25:49,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:25:50,190 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:25:50,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463247468] [2021-02-19 20:25:50,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528477118] [2021-02-19 20:25:50,190 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 20:25:50,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 20:25:50,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:25:50,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 20:25:50,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:25:50,913 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2021-02-19 20:25:51,179 WARN L202 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2021-02-19 20:25:51,267 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:25:51,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:25:51,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 33 [2021-02-19 20:25:51,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550824353] [2021-02-19 20:25:51,268 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-02-19 20:25:51,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:25:51,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-02-19 20:25:51,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=876, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 20:25:51,269 INFO L87 Difference]: Start difference. First operand 2645 states and 8555 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:25:52,427 WARN L202 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 62 [2021-02-19 20:25:53,102 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-02-19 20:25:53,640 WARN L202 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2021-02-19 20:25:53,831 WARN L202 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-02-19 20:25:54,067 WARN L202 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-02-19 20:25:54,202 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2021-02-19 20:25:54,434 WARN L202 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 75 [2021-02-19 20:25:54,860 WARN L202 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 73 [2021-02-19 20:25:55,082 WARN L202 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2021-02-19 20:25:55,444 WARN L202 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 56 [2021-02-19 20:25:55,729 WARN L202 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 75 [2021-02-19 20:25:56,132 WARN L202 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 76 [2021-02-19 20:25:56,430 WARN L202 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2021-02-19 20:25:57,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:25:57,029 INFO L93 Difference]: Finished difference Result 7155 states and 22256 transitions. [2021-02-19 20:25:57,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-02-19 20:25:57,029 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:25:57,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:25:57,040 INFO L225 Difference]: With dead ends: 7155 [2021-02-19 20:25:57,040 INFO L226 Difference]: Without dead ends: 6793 [2021-02-19 20:25:57,041 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2176 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=1569, Invalid=5571, Unknown=0, NotChecked=0, Total=7140 [2021-02-19 20:25:57,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6793 states. [2021-02-19 20:25:57,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6793 to 3952. [2021-02-19 20:25:57,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3952 states, 3951 states have (on average 3.269805112629714) internal successors, (12919), 3951 states have internal predecessors, (12919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:25:57,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3952 states to 3952 states and 12919 transitions. [2021-02-19 20:25:57,139 INFO L78 Accepts]: Start accepts. Automaton has 3952 states and 12919 transitions. Word has length 34 [2021-02-19 20:25:57,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:25:57,139 INFO L480 AbstractCegarLoop]: Abstraction has 3952 states and 12919 transitions. [2021-02-19 20:25:57,139 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:25:57,139 INFO L276 IsEmpty]: Start isEmpty. Operand 3952 states and 12919 transitions. [2021-02-19 20:25:57,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:25:57,145 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:25:57,145 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:25:57,358 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:25:57,358 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:25:57,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:25:57,360 INFO L82 PathProgramCache]: Analyzing trace with hash -799869765, now seen corresponding path program 16 times [2021-02-19 20:25:57,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:25:57,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162393929] [2021-02-19 20:25:57,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:25:57,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:25:57,698 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:25:57,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162393929] [2021-02-19 20:25:57,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342383471] [2021-02-19 20:25:57,699 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:25:57,717 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:25:57,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:25:57,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 20:25:57,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:25:58,575 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2021-02-19 20:25:58,908 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:25:58,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:25:58,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-02-19 20:25:58,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883134219] [2021-02-19 20:25:58,908 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-02-19 20:25:58,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:25:58,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-02-19 20:25:58,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1118, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 20:25:58,909 INFO L87 Difference]: Start difference. First operand 3952 states and 12919 transitions. Second operand has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:25:59,586 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-02-19 20:26:00,478 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2021-02-19 20:26:01,088 WARN L202 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-02-19 20:26:01,810 WARN L202 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 62 [2021-02-19 20:26:02,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:26:02,272 INFO L93 Difference]: Finished difference Result 6123 states and 19299 transitions. [2021-02-19 20:26:02,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-02-19 20:26:02,273 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:26:02,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:26:02,282 INFO L225 Difference]: With dead ends: 6123 [2021-02-19 20:26:02,282 INFO L226 Difference]: Without dead ends: 6072 [2021-02-19 20:26:02,283 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1605 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1027, Invalid=4673, Unknown=0, NotChecked=0, Total=5700 [2021-02-19 20:26:02,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6072 states. [2021-02-19 20:26:02,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6072 to 4272. [2021-02-19 20:26:02,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4272 states, 4271 states have (on average 3.281432919690939) internal successors, (14015), 4271 states have internal predecessors, (14015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:26:02,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4272 states to 4272 states and 14015 transitions. [2021-02-19 20:26:02,352 INFO L78 Accepts]: Start accepts. Automaton has 4272 states and 14015 transitions. Word has length 34 [2021-02-19 20:26:02,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:26:02,352 INFO L480 AbstractCegarLoop]: Abstraction has 4272 states and 14015 transitions. [2021-02-19 20:26:02,352 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:26:02,352 INFO L276 IsEmpty]: Start isEmpty. Operand 4272 states and 14015 transitions. [2021-02-19 20:26:02,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:26:02,358 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:26:02,358 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:26:02,574 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:26:02,574 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:26:02,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:26:02,575 INFO L82 PathProgramCache]: Analyzing trace with hash 254299323, now seen corresponding path program 17 times [2021-02-19 20:26:02,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:26:02,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132291111] [2021-02-19 20:26:02,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:26:02,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:26:02,926 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:26:02,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132291111] [2021-02-19 20:26:02,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640428342] [2021-02-19 20:26:02,927 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:26:02,947 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 20:26:02,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:26:02,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 20:26:02,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:26:03,427 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-02-19 20:26:03,818 WARN L202 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2021-02-19 20:26:03,986 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-02-19 20:26:04,247 WARN L202 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2021-02-19 20:26:04,420 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:26:04,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:26:04,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-02-19 20:26:04,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788333715] [2021-02-19 20:26:04,421 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-02-19 20:26:04,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:26:04,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-02-19 20:26:04,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=1074, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 20:26:04,422 INFO L87 Difference]: Start difference. First operand 4272 states and 14015 transitions. Second operand has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:26:05,359 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 52 [2021-02-19 20:26:05,938 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2021-02-19 20:26:06,446 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2021-02-19 20:26:07,043 WARN L202 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-02-19 20:26:07,584 WARN L202 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 62 [2021-02-19 20:26:07,936 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-02-19 20:26:08,123 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-02-19 20:26:08,397 WARN L202 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 77 [2021-02-19 20:26:08,555 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 41 [2021-02-19 20:26:08,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:26:08,967 INFO L93 Difference]: Finished difference Result 9418 states and 29999 transitions. [2021-02-19 20:26:08,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-02-19 20:26:08,968 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:26:08,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:26:08,984 INFO L225 Difference]: With dead ends: 9418 [2021-02-19 20:26:08,984 INFO L226 Difference]: Without dead ends: 9316 [2021-02-19 20:26:08,984 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1983 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=1348, Invalid=5294, Unknown=0, NotChecked=0, Total=6642 [2021-02-19 20:26:08,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9316 states. [2021-02-19 20:26:09,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9316 to 5318. [2021-02-19 20:26:09,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5318 states, 5317 states have (on average 3.3009215723152154) internal successors, (17551), 5317 states have internal predecessors, (17551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:26:09,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5318 states to 5318 states and 17551 transitions. [2021-02-19 20:26:09,090 INFO L78 Accepts]: Start accepts. Automaton has 5318 states and 17551 transitions. Word has length 34 [2021-02-19 20:26:09,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:26:09,090 INFO L480 AbstractCegarLoop]: Abstraction has 5318 states and 17551 transitions. [2021-02-19 20:26:09,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:26:09,090 INFO L276 IsEmpty]: Start isEmpty. Operand 5318 states and 17551 transitions. [2021-02-19 20:26:09,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:26:09,097 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:26:09,097 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:26:09,298 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:26:09,298 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:26:09,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:26:09,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1433400133, now seen corresponding path program 18 times [2021-02-19 20:26:09,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:26:09,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182655520] [2021-02-19 20:26:09,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:26:09,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:26:09,626 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:26:09,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182655520] [2021-02-19 20:26:09,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669696401] [2021-02-19 20:26:09,626 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:26:09,645 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 20:26:09,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:26:09,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 20:26:09,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:26:10,125 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-02-19 20:26:10,408 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2021-02-19 20:26:10,745 WARN L202 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 68 [2021-02-19 20:26:10,840 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:26:10,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:26:10,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 33 [2021-02-19 20:26:10,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569710609] [2021-02-19 20:26:10,841 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-02-19 20:26:10,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:26:10,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-02-19 20:26:10,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=890, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 20:26:10,842 INFO L87 Difference]: Start difference. First operand 5318 states and 17551 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:26:11,383 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-02-19 20:26:11,903 WARN L202 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 70 [2021-02-19 20:26:12,294 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2021-02-19 20:26:12,544 WARN L202 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-02-19 20:26:12,925 WARN L202 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2021-02-19 20:26:13,161 WARN L202 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-02-19 20:26:13,819 WARN L202 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-02-19 20:26:14,346 WARN L202 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 81 [2021-02-19 20:26:14,593 WARN L202 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 76 [2021-02-19 20:26:14,993 WARN L202 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2021-02-19 20:26:15,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:26:15,821 INFO L93 Difference]: Finished difference Result 10127 states and 32309 transitions. [2021-02-19 20:26:15,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-02-19 20:26:15,822 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:26:15,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:26:15,837 INFO L225 Difference]: With dead ends: 10127 [2021-02-19 20:26:15,837 INFO L226 Difference]: Without dead ends: 9768 [2021-02-19 20:26:15,838 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1824 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=1136, Invalid=5026, Unknown=0, NotChecked=0, Total=6162 [2021-02-19 20:26:15,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9768 states. [2021-02-19 20:26:15,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9768 to 5562. [2021-02-19 20:26:15,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5562 states, 5561 states have (on average 3.3053407660492717) internal successors, (18381), 5561 states have internal predecessors, (18381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:26:15,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5562 states to 5562 states and 18381 transitions. [2021-02-19 20:26:15,943 INFO L78 Accepts]: Start accepts. Automaton has 5562 states and 18381 transitions. Word has length 34 [2021-02-19 20:26:15,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:26:15,943 INFO L480 AbstractCegarLoop]: Abstraction has 5562 states and 18381 transitions. [2021-02-19 20:26:15,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:26:15,943 INFO L276 IsEmpty]: Start isEmpty. Operand 5562 states and 18381 transitions. [2021-02-19 20:26:15,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:26:15,951 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:26:15,951 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:26:16,166 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:26:16,166 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:26:16,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:26:16,166 INFO L82 PathProgramCache]: Analyzing trace with hash 940541319, now seen corresponding path program 19 times [2021-02-19 20:26:16,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:26:16,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305265891] [2021-02-19 20:26:16,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:26:16,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:26:16,587 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:26:16,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305265891] [2021-02-19 20:26:16,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710631512] [2021-02-19 20:26:16,588 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 20:26:16,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:26:16,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 20:26:16,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:26:17,133 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2021-02-19 20:26:17,357 WARN L202 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2021-02-19 20:26:17,644 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-02-19 20:26:17,896 WARN L202 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2021-02-19 20:26:18,068 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:26:18,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:26:18,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-02-19 20:26:18,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017360983] [2021-02-19 20:26:18,069 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-02-19 20:26:18,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:26:18,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-02-19 20:26:18,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=1116, Unknown=0, NotChecked=0, Total=1406 [2021-02-19 20:26:18,070 INFO L87 Difference]: Start difference. First operand 5562 states and 18381 transitions. Second operand has 38 states, 38 states have (on average 1.736842105263158) internal successors, (66), 37 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:26:19,099 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 35 [2021-02-19 20:26:19,312 WARN L202 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 63 [2021-02-19 20:26:19,644 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 35 [2021-02-19 20:26:20,139 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 31 [2021-02-19 20:26:20,331 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2021-02-19 20:26:20,529 WARN L202 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2021-02-19 20:26:20,703 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 32 [2021-02-19 20:26:21,033 WARN L202 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-02-19 20:26:21,181 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 45 [2021-02-19 20:26:21,743 WARN L202 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 77 [2021-02-19 20:26:21,958 WARN L202 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2021-02-19 20:26:22,206 WARN L202 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 74 [2021-02-19 20:26:22,368 WARN L202 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 40 [2021-02-19 20:26:22,545 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-02-19 20:26:22,683 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-02-19 20:26:22,814 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 43 [2021-02-19 20:26:23,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:26:23,220 INFO L93 Difference]: Finished difference Result 13062 states and 42271 transitions. [2021-02-19 20:26:23,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-02-19 20:26:23,221 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.736842105263158) internal successors, (66), 37 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:26:23,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:26:23,245 INFO L225 Difference]: With dead ends: 13062 [2021-02-19 20:26:23,245 INFO L226 Difference]: Without dead ends: 12975 [2021-02-19 20:26:23,246 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2013 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=1432, Invalid=5048, Unknown=0, NotChecked=0, Total=6480 [2021-02-19 20:26:23,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12975 states. [2021-02-19 20:26:23,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12975 to 7340. [2021-02-19 20:26:23,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7340 states, 7339 states have (on average 3.336558114184494) internal successors, (24487), 7339 states have internal predecessors, (24487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:26:23,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7340 states to 7340 states and 24487 transitions. [2021-02-19 20:26:23,407 INFO L78 Accepts]: Start accepts. Automaton has 7340 states and 24487 transitions. Word has length 34 [2021-02-19 20:26:23,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:26:23,407 INFO L480 AbstractCegarLoop]: Abstraction has 7340 states and 24487 transitions. [2021-02-19 20:26:23,408 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.736842105263158) internal successors, (66), 37 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:26:23,408 INFO L276 IsEmpty]: Start isEmpty. Operand 7340 states and 24487 transitions. [2021-02-19 20:26:23,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:26:23,420 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:26:23,420 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:26:23,634 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable231 [2021-02-19 20:26:23,634 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:26:23,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:26:23,634 INFO L82 PathProgramCache]: Analyzing trace with hash 783457671, now seen corresponding path program 20 times [2021-02-19 20:26:23,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:26:23,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684568018] [2021-02-19 20:26:23,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:26:23,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:26:23,947 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:26:23,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684568018] [2021-02-19 20:26:23,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780081855] [2021-02-19 20:26:23,947 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:26:23,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:26:23,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:26:23,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 20:26:23,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:26:24,538 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2021-02-19 20:26:24,748 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2021-02-19 20:26:25,034 WARN L202 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 68 [2021-02-19 20:26:25,164 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:26:25,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:26:25,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-02-19 20:26:25,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983279564] [2021-02-19 20:26:25,165 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-02-19 20:26:25,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:26:25,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-02-19 20:26:25,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=809, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 20:26:25,166 INFO L87 Difference]: Start difference. First operand 7340 states and 24487 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:26:25,991 WARN L202 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-02-19 20:26:26,761 WARN L202 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-02-19 20:26:27,106 WARN L202 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-02-19 20:26:27,237 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2021-02-19 20:26:27,958 WARN L202 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 76 [2021-02-19 20:26:28,170 WARN L202 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2021-02-19 20:26:28,407 WARN L202 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-02-19 20:26:28,659 WARN L202 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-02-19 20:26:28,799 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-02-19 20:26:28,993 WARN L202 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-02-19 20:26:29,250 WARN L202 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2021-02-19 20:26:30,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:26:30,111 INFO L93 Difference]: Finished difference Result 14783 states and 48239 transitions. [2021-02-19 20:26:30,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-02-19 20:26:30,112 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:26:30,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:26:30,137 INFO L225 Difference]: With dead ends: 14783 [2021-02-19 20:26:30,138 INFO L226 Difference]: Without dead ends: 14361 [2021-02-19 20:26:30,138 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1693 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=1086, Invalid=4316, Unknown=0, NotChecked=0, Total=5402 [2021-02-19 20:26:30,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14361 states. [2021-02-19 20:26:30,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14361 to 8734. [2021-02-19 20:26:30,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8734 states, 8733 states have (on average 3.3506240696209777) internal successors, (29261), 8733 states have internal predecessors, (29261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:26:30,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8734 states to 8734 states and 29261 transitions. [2021-02-19 20:26:30,372 INFO L78 Accepts]: Start accepts. Automaton has 8734 states and 29261 transitions. Word has length 34 [2021-02-19 20:26:30,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:26:30,372 INFO L480 AbstractCegarLoop]: Abstraction has 8734 states and 29261 transitions. [2021-02-19 20:26:30,372 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:26:30,372 INFO L276 IsEmpty]: Start isEmpty. Operand 8734 states and 29261 transitions. [2021-02-19 20:26:30,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:26:30,385 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:26:30,385 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:26:30,595 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-02-19 20:26:30,595 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:26:30,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:26:30,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1835171925, now seen corresponding path program 21 times [2021-02-19 20:26:30,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:26:30,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509402513] [2021-02-19 20:26:30,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:26:30,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:26:30,915 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:26:30,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509402513] [2021-02-19 20:26:30,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915487117] [2021-02-19 20:26:30,915 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 20:26:30,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 20:26:30,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:26:30,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 20:26:30,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:26:31,482 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-02-19 20:26:31,793 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2021-02-19 20:26:32,140 WARN L202 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 68 [2021-02-19 20:26:32,227 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:26:32,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:26:32,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-02-19 20:26:32,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769074469] [2021-02-19 20:26:32,228 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-02-19 20:26:32,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:26:32,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-02-19 20:26:32,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=869, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 20:26:32,228 INFO L87 Difference]: Start difference. First operand 8734 states and 29261 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:26:32,915 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-02-19 20:26:33,326 WARN L202 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 70 [2021-02-19 20:26:33,758 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2021-02-19 20:26:33,944 WARN L202 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2021-02-19 20:26:34,384 WARN L202 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 76 [2021-02-19 20:26:35,353 WARN L202 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 81 [2021-02-19 20:26:35,725 WARN L202 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2021-02-19 20:26:36,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:26:36,339 INFO L93 Difference]: Finished difference Result 13041 states and 42542 transitions. [2021-02-19 20:26:36,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-02-19 20:26:36,339 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:26:36,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:26:36,358 INFO L225 Difference]: With dead ends: 13041 [2021-02-19 20:26:36,359 INFO L226 Difference]: Without dead ends: 12684 [2021-02-19 20:26:36,359 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1399 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=909, Invalid=4061, Unknown=0, NotChecked=0, Total=4970 [2021-02-19 20:26:36,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12684 states. [2021-02-19 20:26:36,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12684 to 8908. [2021-02-19 20:26:36,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8908 states, 8907 states have (on average 3.3490513079600315) internal successors, (29830), 8907 states have internal predecessors, (29830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:26:36,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8908 states to 8908 states and 29830 transitions. [2021-02-19 20:26:36,519 INFO L78 Accepts]: Start accepts. Automaton has 8908 states and 29830 transitions. Word has length 34 [2021-02-19 20:26:36,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:26:36,519 INFO L480 AbstractCegarLoop]: Abstraction has 8908 states and 29830 transitions. [2021-02-19 20:26:36,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:26:36,519 INFO L276 IsEmpty]: Start isEmpty. Operand 8908 states and 29830 transitions. [2021-02-19 20:26:36,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:26:36,533 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:26:36,533 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:26:36,746 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2021-02-19 20:26:36,746 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:26:36,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:26:36,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1431723503, now seen corresponding path program 22 times [2021-02-19 20:26:36,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:26:36,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200618384] [2021-02-19 20:26:36,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:26:36,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:26:37,052 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:26:37,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200618384] [2021-02-19 20:26:37,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475373449] [2021-02-19 20:26:37,052 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:26:37,071 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:26:37,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:26:37,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 20:26:37,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:26:37,568 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-02-19 20:26:37,800 WARN L202 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2021-02-19 20:26:38,264 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:26:38,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:26:38,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-02-19 20:26:38,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75374063] [2021-02-19 20:26:38,264 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 20:26:38,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:26:38,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 20:26:38,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=981, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 20:26:38,265 INFO L87 Difference]: Start difference. First operand 8908 states and 29830 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:26:39,091 WARN L202 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 70 [2021-02-19 20:26:39,583 WARN L202 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2021-02-19 20:26:39,966 WARN L202 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 67 [2021-02-19 20:26:40,224 WARN L202 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-02-19 20:26:41,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:26:41,073 INFO L93 Difference]: Finished difference Result 12200 states and 40288 transitions. [2021-02-19 20:26:41,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-02-19 20:26:41,074 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:26:41,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:26:41,092 INFO L225 Difference]: With dead ends: 12200 [2021-02-19 20:26:41,092 INFO L226 Difference]: Without dead ends: 12128 [2021-02-19 20:26:41,093 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 958 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=774, Invalid=3008, Unknown=0, NotChecked=0, Total=3782 [2021-02-19 20:26:41,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12128 states. [2021-02-19 20:26:41,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12128 to 8974. [2021-02-19 20:26:41,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8974 states, 8973 states have (on average 3.3484899141870055) internal successors, (30046), 8973 states have internal predecessors, (30046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:26:41,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8974 states to 8974 states and 30046 transitions. [2021-02-19 20:26:41,271 INFO L78 Accepts]: Start accepts. Automaton has 8974 states and 30046 transitions. Word has length 34 [2021-02-19 20:26:41,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:26:41,271 INFO L480 AbstractCegarLoop]: Abstraction has 8974 states and 30046 transitions. [2021-02-19 20:26:41,271 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:26:41,271 INFO L276 IsEmpty]: Start isEmpty. Operand 8974 states and 30046 transitions. [2021-02-19 20:26:41,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:26:41,283 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:26:41,283 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:26:41,484 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable293 [2021-02-19 20:26:41,484 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:26:41,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:26:41,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1212536303, now seen corresponding path program 23 times [2021-02-19 20:26:41,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:26:41,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893535205] [2021-02-19 20:26:41,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:26:41,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:26:41,845 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:26:41,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893535205] [2021-02-19 20:26:41,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943807410] [2021-02-19 20:26:41,846 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:26:41,866 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 20:26:41,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:26:41,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 20:26:41,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:26:42,333 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-02-19 20:26:42,543 WARN L202 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2021-02-19 20:26:42,978 WARN L202 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-02-19 20:26:43,273 WARN L202 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2021-02-19 20:26:43,473 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:26:43,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:26:43,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-02-19 20:26:43,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178184163] [2021-02-19 20:26:43,473 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-02-19 20:26:43,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:26:43,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-02-19 20:26:43,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1086, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 20:26:43,474 INFO L87 Difference]: Start difference. First operand 8974 states and 30046 transitions. Second operand has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:26:44,784 WARN L202 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 64 [2021-02-19 20:26:45,382 WARN L202 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2021-02-19 20:26:45,593 WARN L202 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 55 [2021-02-19 20:26:46,248 WARN L202 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2021-02-19 20:26:46,919 WARN L202 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 59 [2021-02-19 20:26:47,287 WARN L202 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 69 [2021-02-19 20:26:47,953 WARN L202 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 75 [2021-02-19 20:26:48,158 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 41 [2021-02-19 20:26:48,440 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-02-19 20:26:48,701 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 51 [2021-02-19 20:26:49,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:26:49,238 INFO L93 Difference]: Finished difference Result 15037 states and 49384 transitions. [2021-02-19 20:26:49,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-02-19 20:26:49,239 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:26:49,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:26:49,262 INFO L225 Difference]: With dead ends: 15037 [2021-02-19 20:26:49,262 INFO L226 Difference]: Without dead ends: 14962 [2021-02-19 20:26:49,263 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2322 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=1645, Invalid=5837, Unknown=0, NotChecked=0, Total=7482 [2021-02-19 20:26:49,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14962 states. [2021-02-19 20:26:49,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14962 to 9146. [2021-02-19 20:26:49,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9146 states, 9145 states have (on average 3.3429196282121376) internal successors, (30571), 9145 states have internal predecessors, (30571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:26:49,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9146 states to 9146 states and 30571 transitions. [2021-02-19 20:26:49,423 INFO L78 Accepts]: Start accepts. Automaton has 9146 states and 30571 transitions. Word has length 34 [2021-02-19 20:26:49,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:26:49,423 INFO L480 AbstractCegarLoop]: Abstraction has 9146 states and 30571 transitions. [2021-02-19 20:26:49,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:26:49,423 INFO L276 IsEmpty]: Start isEmpty. Operand 9146 states and 30571 transitions. [2021-02-19 20:26:49,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:26:49,434 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:26:49,434 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:26:49,634 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable302,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:26:49,634 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:26:49,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:26:49,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1055452655, now seen corresponding path program 24 times [2021-02-19 20:26:49,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:26:49,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054196316] [2021-02-19 20:26:49,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:26:49,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:26:49,953 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:26:49,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054196316] [2021-02-19 20:26:49,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24773584] [2021-02-19 20:26:49,953 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:26:49,972 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 20:26:49,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:26:49,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 20:26:49,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:26:50,526 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-02-19 20:26:50,728 WARN L202 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2021-02-19 20:26:51,140 WARN L202 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 68 [2021-02-19 20:26:51,248 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:26:51,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:26:51,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-02-19 20:26:51,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731941073] [2021-02-19 20:26:51,250 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-02-19 20:26:51,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:26:51,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-02-19 20:26:51,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=819, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 20:26:51,251 INFO L87 Difference]: Start difference. First operand 9146 states and 30571 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:26:52,074 WARN L202 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 70 [2021-02-19 20:26:52,508 WARN L202 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2021-02-19 20:26:52,920 WARN L202 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 67 [2021-02-19 20:26:53,392 WARN L202 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 81 [2021-02-19 20:26:53,585 WARN L202 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-02-19 20:26:54,109 WARN L202 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 81 [2021-02-19 20:26:54,253 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-02-19 20:26:54,509 WARN L202 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 76 [2021-02-19 20:26:54,813 WARN L202 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 66 [2021-02-19 20:26:55,165 WARN L202 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-02-19 20:26:55,476 WARN L202 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 73 [2021-02-19 20:26:55,749 WARN L202 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2021-02-19 20:26:55,925 WARN L202 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-02-19 20:26:56,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:26:56,890 INFO L93 Difference]: Finished difference Result 16097 states and 52762 transitions. [2021-02-19 20:26:56,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-02-19 20:26:56,890 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:26:56,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:26:56,916 INFO L225 Difference]: With dead ends: 16097 [2021-02-19 20:26:56,916 INFO L226 Difference]: Without dead ends: 15631 [2021-02-19 20:26:56,916 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1642 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=1114, Invalid=4436, Unknown=0, NotChecked=0, Total=5550 [2021-02-19 20:26:56,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15631 states. [2021-02-19 20:26:57,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15631 to 9196. [2021-02-19 20:26:57,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9196 states, 9195 states have (on average 3.344970092441544) internal successors, (30757), 9195 states have internal predecessors, (30757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:26:57,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9196 states to 9196 states and 30757 transitions. [2021-02-19 20:26:57,098 INFO L78 Accepts]: Start accepts. Automaton has 9196 states and 30757 transitions. Word has length 34 [2021-02-19 20:26:57,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:26:57,098 INFO L480 AbstractCegarLoop]: Abstraction has 9196 states and 30757 transitions. [2021-02-19 20:26:57,098 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:26:57,098 INFO L276 IsEmpty]: Start isEmpty. Operand 9196 states and 30757 transitions. [2021-02-19 20:26:57,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:26:57,109 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:26:57,109 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:26:57,309 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable315 [2021-02-19 20:26:57,309 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:26:57,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:26:57,309 INFO L82 PathProgramCache]: Analyzing trace with hash -763757261, now seen corresponding path program 25 times [2021-02-19 20:26:57,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:26:57,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210614057] [2021-02-19 20:26:57,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:26:57,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:26:57,606 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:26:57,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210614057] [2021-02-19 20:26:57,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718503170] [2021-02-19 20:26:57,607 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:26:57,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:26:57,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 20:26:57,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:26:58,136 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-02-19 20:26:58,330 WARN L202 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2021-02-19 20:26:58,614 WARN L202 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2021-02-19 20:26:58,991 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:26:58,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:26:58,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-02-19 20:26:58,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968408038] [2021-02-19 20:26:58,991 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-02-19 20:26:58,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:26:58,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-02-19 20:26:58,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=832, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 20:26:58,992 INFO L87 Difference]: Start difference. First operand 9196 states and 30757 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:26:59,902 WARN L202 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 81 [2021-02-19 20:27:00,336 WARN L202 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2021-02-19 20:27:00,801 WARN L202 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 81 [2021-02-19 20:27:01,013 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-02-19 20:27:01,273 WARN L202 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-02-19 20:27:01,668 WARN L202 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 75 [2021-02-19 20:27:02,126 WARN L202 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2021-02-19 20:27:02,400 WARN L202 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 76 [2021-02-19 20:27:02,621 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 44 [2021-02-19 20:27:03,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:27:03,970 INFO L93 Difference]: Finished difference Result 15913 states and 52373 transitions. [2021-02-19 20:27:03,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-02-19 20:27:03,974 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:27:03,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:27:03,997 INFO L225 Difference]: With dead ends: 15913 [2021-02-19 20:27:03,997 INFO L226 Difference]: Without dead ends: 15585 [2021-02-19 20:27:03,998 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1238 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=994, Invalid=3562, Unknown=0, NotChecked=0, Total=4556 [2021-02-19 20:27:04,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15585 states. [2021-02-19 20:27:04,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15585 to 9252. [2021-02-19 20:27:04,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9252 states, 9251 states have (on average 3.345908550426981) internal successors, (30953), 9251 states have internal predecessors, (30953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:27:04,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9252 states to 9252 states and 30953 transitions. [2021-02-19 20:27:04,150 INFO L78 Accepts]: Start accepts. Automaton has 9252 states and 30953 transitions. Word has length 34 [2021-02-19 20:27:04,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:27:04,150 INFO L480 AbstractCegarLoop]: Abstraction has 9252 states and 30953 transitions. [2021-02-19 20:27:04,150 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:27:04,150 INFO L276 IsEmpty]: Start isEmpty. Operand 9252 states and 30953 transitions. [2021-02-19 20:27:04,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:27:04,160 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:27:04,160 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:27:04,360 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:27:04,360 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:27:04,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:27:04,361 INFO L82 PathProgramCache]: Analyzing trace with hash 572455031, now seen corresponding path program 26 times [2021-02-19 20:27:04,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:27:04,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331214274] [2021-02-19 20:27:04,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:27:04,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:27:04,754 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:27:04,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331214274] [2021-02-19 20:27:04,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923207000] [2021-02-19 20:27:04,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:27:04,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:27:04,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:27:04,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 20:27:04,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:27:05,403 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2021-02-19 20:27:05,673 WARN L202 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2021-02-19 20:27:06,003 WARN L202 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2021-02-19 20:27:06,075 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:27:06,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:27:06,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 33 [2021-02-19 20:27:06,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975985456] [2021-02-19 20:27:06,076 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-02-19 20:27:06,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:27:06,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-02-19 20:27:06,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=936, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 20:27:06,076 INFO L87 Difference]: Start difference. First operand 9252 states and 30953 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:27:07,417 WARN L202 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-02-19 20:27:08,125 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2021-02-19 20:27:08,253 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2021-02-19 20:27:08,630 WARN L202 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 63 [2021-02-19 20:27:08,837 WARN L202 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2021-02-19 20:27:09,112 WARN L202 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 74 [2021-02-19 20:27:09,708 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2021-02-19 20:27:09,853 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 45 [2021-02-19 20:27:10,908 WARN L202 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 61 [2021-02-19 20:27:11,146 WARN L202 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-02-19 20:27:11,451 WARN L202 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 73 [2021-02-19 20:27:11,745 WARN L202 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 73 [2021-02-19 20:27:12,094 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2021-02-19 20:27:12,405 WARN L202 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-02-19 20:27:12,581 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-02-19 20:27:13,102 WARN L202 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 73 [2021-02-19 20:27:13,426 WARN L202 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2021-02-19 20:27:14,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:27:14,321 INFO L93 Difference]: Finished difference Result 14856 states and 48487 transitions. [2021-02-19 20:27:14,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-02-19 20:27:14,322 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:27:14,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:27:14,343 INFO L225 Difference]: With dead ends: 14856 [2021-02-19 20:27:14,343 INFO L226 Difference]: Without dead ends: 14505 [2021-02-19 20:27:14,344 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3485 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=1789, Invalid=8923, Unknown=0, NotChecked=0, Total=10712 [2021-02-19 20:27:14,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14505 states. [2021-02-19 20:27:14,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14505 to 9576. [2021-02-19 20:27:14,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9576 states, 9575 states have (on average 3.3461096605744127) internal successors, (32039), 9575 states have internal predecessors, (32039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:27:14,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9576 states to 9576 states and 32039 transitions. [2021-02-19 20:27:14,500 INFO L78 Accepts]: Start accepts. Automaton has 9576 states and 32039 transitions. Word has length 34 [2021-02-19 20:27:14,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:27:14,500 INFO L480 AbstractCegarLoop]: Abstraction has 9576 states and 32039 transitions. [2021-02-19 20:27:14,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:27:14,500 INFO L276 IsEmpty]: Start isEmpty. Operand 9576 states and 32039 transitions. [2021-02-19 20:27:14,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:27:14,511 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:27:14,511 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:27:14,711 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable359 [2021-02-19 20:27:14,712 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:27:14,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:27:14,712 INFO L82 PathProgramCache]: Analyzing trace with hash -299968453, now seen corresponding path program 27 times [2021-02-19 20:27:14,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:27:14,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383599073] [2021-02-19 20:27:14,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:27:14,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:27:15,009 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:27:15,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383599073] [2021-02-19 20:27:15,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667714579] [2021-02-19 20:27:15,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:27:15,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 20:27:15,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:27:15,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 20:27:15,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:27:15,795 WARN L202 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2021-02-19 20:27:16,163 WARN L202 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2021-02-19 20:27:16,241 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:27:16,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:27:16,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-02-19 20:27:16,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619271898] [2021-02-19 20:27:16,242 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-02-19 20:27:16,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:27:16,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-02-19 20:27:16,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=858, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 20:27:16,242 INFO L87 Difference]: Start difference. First operand 9576 states and 32039 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:27:16,430 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2021-02-19 20:27:17,182 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2021-02-19 20:27:17,548 WARN L202 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2021-02-19 20:27:18,054 WARN L202 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2021-02-19 20:27:18,400 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2021-02-19 20:27:18,664 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 38 [2021-02-19 20:27:19,017 WARN L202 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-02-19 20:27:19,180 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-02-19 20:27:19,430 WARN L202 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2021-02-19 20:27:20,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:27:20,147 INFO L93 Difference]: Finished difference Result 15149 states and 49635 transitions. [2021-02-19 20:27:20,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-02-19 20:27:20,148 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:27:20,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:27:20,171 INFO L225 Difference]: With dead ends: 15149 [2021-02-19 20:27:20,171 INFO L226 Difference]: Without dead ends: 14792 [2021-02-19 20:27:20,171 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1141 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=721, Invalid=3439, Unknown=0, NotChecked=0, Total=4160 [2021-02-19 20:27:20,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14792 states. [2021-02-19 20:27:20,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14792 to 9678. [2021-02-19 20:27:20,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9678 states, 9677 states have (on average 3.3461816678722744) internal successors, (32381), 9677 states have internal predecessors, (32381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:27:20,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9678 states to 9678 states and 32381 transitions. [2021-02-19 20:27:20,330 INFO L78 Accepts]: Start accepts. Automaton has 9678 states and 32381 transitions. Word has length 34 [2021-02-19 20:27:20,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:27:20,331 INFO L480 AbstractCegarLoop]: Abstraction has 9678 states and 32381 transitions. [2021-02-19 20:27:20,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:27:20,331 INFO L276 IsEmpty]: Start isEmpty. Operand 9678 states and 32381 transitions. [2021-02-19 20:27:20,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:27:20,342 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:27:20,342 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:27:20,554 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable381,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:27:20,554 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:27:20,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:27:20,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1675860881, now seen corresponding path program 28 times [2021-02-19 20:27:20,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:27:20,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62926962] [2021-02-19 20:27:20,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:27:20,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:27:20,865 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:27:20,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62926962] [2021-02-19 20:27:20,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994321377] [2021-02-19 20:27:20,866 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:27:20,887 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:27:20,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:27:20,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 20:27:20,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:27:21,646 WARN L202 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2021-02-19 20:27:22,140 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:27:22,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:27:22,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-02-19 20:27:22,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062514344] [2021-02-19 20:27:22,141 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 20:27:22,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:27:22,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 20:27:22,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=972, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 20:27:22,141 INFO L87 Difference]: Start difference. First operand 9678 states and 32381 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:27:22,482 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2021-02-19 20:27:22,867 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 34 [2021-02-19 20:27:23,270 WARN L202 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2021-02-19 20:27:23,614 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2021-02-19 20:27:23,939 WARN L202 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2021-02-19 20:27:24,244 WARN L202 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2021-02-19 20:27:25,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:27:25,245 INFO L93 Difference]: Finished difference Result 14742 states and 48530 transitions. [2021-02-19 20:27:25,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-02-19 20:27:25,246 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:27:25,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:27:25,269 INFO L225 Difference]: With dead ends: 14742 [2021-02-19 20:27:25,269 INFO L226 Difference]: Without dead ends: 14670 [2021-02-19 20:27:25,270 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1070 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=758, Invalid=3024, Unknown=0, NotChecked=0, Total=3782 [2021-02-19 20:27:25,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14670 states. [2021-02-19 20:27:25,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14670 to 9802. [2021-02-19 20:27:25,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9802 states, 9801 states have (on average 3.346291194776043) internal successors, (32797), 9801 states have internal predecessors, (32797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:27:25,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9802 states to 9802 states and 32797 transitions. [2021-02-19 20:27:25,425 INFO L78 Accepts]: Start accepts. Automaton has 9802 states and 32797 transitions. Word has length 34 [2021-02-19 20:27:25,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:27:25,425 INFO L480 AbstractCegarLoop]: Abstraction has 9802 states and 32797 transitions. [2021-02-19 20:27:25,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:27:25,425 INFO L276 IsEmpty]: Start isEmpty. Operand 9802 states and 32797 transitions. [2021-02-19 20:27:25,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:27:25,437 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:27:25,437 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:27:25,649 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable404 [2021-02-19 20:27:25,650 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:27:25,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:27:25,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1895048081, now seen corresponding path program 29 times [2021-02-19 20:27:25,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:27:25,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572165063] [2021-02-19 20:27:25,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:27:25,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:27:25,999 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:27:25,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572165063] [2021-02-19 20:27:25,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951188676] [2021-02-19 20:27:25,999 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:27:26,018 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 20:27:26,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:27:26,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 20:27:26,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:27:26,506 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-02-19 20:27:26,817 WARN L202 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2021-02-19 20:27:27,298 WARN L202 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-02-19 20:27:27,557 WARN L202 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 65 [2021-02-19 20:27:27,726 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:27:27,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:27:27,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-02-19 20:27:27,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735971515] [2021-02-19 20:27:27,726 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-02-19 20:27:27,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:27:27,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-02-19 20:27:27,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=1072, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 20:27:27,727 INFO L87 Difference]: Start difference. First operand 9802 states and 32797 transitions. Second operand has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:27:28,042 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 48 [2021-02-19 20:27:28,441 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 34 [2021-02-19 20:27:28,977 WARN L202 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2021-02-19 20:27:29,361 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 45 [2021-02-19 20:27:29,597 WARN L202 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-02-19 20:27:30,139 WARN L202 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2021-02-19 20:27:30,457 WARN L202 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 64 [2021-02-19 20:27:30,867 WARN L202 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 59 [2021-02-19 20:27:31,240 WARN L202 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 77 [2021-02-19 20:27:31,458 WARN L202 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2021-02-19 20:27:31,947 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 37 [2021-02-19 20:27:32,472 WARN L202 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 68 [2021-02-19 20:27:32,784 WARN L202 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 71 [2021-02-19 20:27:32,957 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 41 [2021-02-19 20:27:33,103 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 34 [2021-02-19 20:27:33,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:27:33,489 INFO L93 Difference]: Finished difference Result 15311 states and 50239 transitions. [2021-02-19 20:27:33,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-02-19 20:27:33,489 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:27:33,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:27:33,513 INFO L225 Difference]: With dead ends: 15311 [2021-02-19 20:27:33,514 INFO L226 Difference]: Without dead ends: 15236 [2021-02-19 20:27:33,514 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1987 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=1408, Invalid=4912, Unknown=0, NotChecked=0, Total=6320 [2021-02-19 20:27:33,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15236 states. [2021-02-19 20:27:33,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15236 to 9808. [2021-02-19 20:27:33,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9808 states, 9807 states have (on average 3.3470990109105743) internal successors, (32825), 9807 states have internal predecessors, (32825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:27:33,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9808 states to 9808 states and 32825 transitions. [2021-02-19 20:27:33,683 INFO L78 Accepts]: Start accepts. Automaton has 9808 states and 32825 transitions. Word has length 34 [2021-02-19 20:27:33,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:27:33,683 INFO L480 AbstractCegarLoop]: Abstraction has 9808 states and 32825 transitions. [2021-02-19 20:27:33,683 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:27:33,684 INFO L276 IsEmpty]: Start isEmpty. Operand 9808 states and 32825 transitions. [2021-02-19 20:27:33,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:27:33,696 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:27:33,696 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:27:33,897 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable418,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:27:33,897 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:27:33,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:27:33,897 INFO L82 PathProgramCache]: Analyzing trace with hash -2052131729, now seen corresponding path program 30 times [2021-02-19 20:27:33,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:27:33,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408715186] [2021-02-19 20:27:33,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:27:33,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:27:34,279 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:27:34,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408715186] [2021-02-19 20:27:34,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304598799] [2021-02-19 20:27:34,280 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:27:34,299 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 20:27:34,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:27:34,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 20:27:34,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:27:34,777 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-02-19 20:27:35,092 WARN L202 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2021-02-19 20:27:35,515 WARN L202 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 67 [2021-02-19 20:27:35,644 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:27:35,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:27:35,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-02-19 20:27:35,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298362628] [2021-02-19 20:27:35,644 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-02-19 20:27:35,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:27:35,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-02-19 20:27:35,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=815, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 20:27:35,645 INFO L87 Difference]: Start difference. First operand 9808 states and 32825 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:27:35,983 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2021-02-19 20:27:36,369 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 34 [2021-02-19 20:27:36,802 WARN L202 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2021-02-19 20:27:37,163 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2021-02-19 20:27:37,520 WARN L202 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 67 [2021-02-19 20:27:37,866 WARN L202 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-02-19 20:27:38,073 WARN L202 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-02-19 20:27:38,516 WARN L202 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 74 [2021-02-19 20:27:38,701 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-02-19 20:27:38,983 WARN L202 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 76 [2021-02-19 20:27:39,270 WARN L202 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 66 [2021-02-19 20:27:39,753 WARN L202 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 77 [2021-02-19 20:27:40,038 WARN L202 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-02-19 20:27:40,357 WARN L202 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 81 [2021-02-19 20:27:40,670 WARN L202 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 73 [2021-02-19 20:27:40,983 WARN L202 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 72 [2021-02-19 20:27:41,170 WARN L202 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-02-19 20:27:41,480 WARN L202 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2021-02-19 20:27:42,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:27:42,844 INFO L93 Difference]: Finished difference Result 18280 states and 59487 transitions. [2021-02-19 20:27:42,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-02-19 20:27:42,845 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:27:42,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:27:42,873 INFO L225 Difference]: With dead ends: 18280 [2021-02-19 20:27:42,873 INFO L226 Difference]: Without dead ends: 17725 [2021-02-19 20:27:42,874 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2096 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=1302, Invalid=5340, Unknown=0, NotChecked=0, Total=6642 [2021-02-19 20:27:42,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17725 states. [2021-02-19 20:27:43,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17725 to 9958. [2021-02-19 20:27:43,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9958 states, 9957 states have (on average 3.3482976800241038) internal successors, (33339), 9957 states have internal predecessors, (33339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:27:43,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9958 states to 9958 states and 33339 transitions. [2021-02-19 20:27:43,057 INFO L78 Accepts]: Start accepts. Automaton has 9958 states and 33339 transitions. Word has length 34 [2021-02-19 20:27:43,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:27:43,057 INFO L480 AbstractCegarLoop]: Abstraction has 9958 states and 33339 transitions. [2021-02-19 20:27:43,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:27:43,057 INFO L276 IsEmpty]: Start isEmpty. Operand 9958 states and 33339 transitions. [2021-02-19 20:27:43,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:27:43,068 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:27:43,068 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:27:43,269 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable439 [2021-02-19 20:27:43,269 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:27:43,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:27:43,269 INFO L82 PathProgramCache]: Analyzing trace with hash 423625651, now seen corresponding path program 31 times [2021-02-19 20:27:43,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:27:43,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681381289] [2021-02-19 20:27:43,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:27:43,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:27:43,601 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:27:43,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681381289] [2021-02-19 20:27:43,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4758097] [2021-02-19 20:27:43,602 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:27:43,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:27:43,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 20:27:43,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:27:44,131 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-02-19 20:27:44,451 WARN L202 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2021-02-19 20:27:44,765 WARN L202 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2021-02-19 20:27:44,919 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-02-19 20:27:45,110 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:27:45,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:27:45,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-02-19 20:27:45,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772871976] [2021-02-19 20:27:45,110 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-02-19 20:27:45,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:27:45,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-02-19 20:27:45,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=829, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 20:27:45,111 INFO L87 Difference]: Start difference. First operand 9958 states and 33339 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:27:45,293 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-02-19 20:27:45,485 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2021-02-19 20:27:45,870 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 34 [2021-02-19 20:27:46,344 WARN L202 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 79 [2021-02-19 20:27:46,714 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2021-02-19 20:27:47,125 WARN L202 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 81 [2021-02-19 20:27:47,482 WARN L202 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-02-19 20:27:47,886 WARN L202 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 73 [2021-02-19 20:27:48,311 WARN L202 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 79 [2021-02-19 20:27:48,573 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 44 [2021-02-19 20:27:48,934 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 44 [2021-02-19 20:27:49,223 WARN L202 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2021-02-19 20:27:49,381 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 41 [2021-02-19 20:27:50,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:27:50,679 INFO L93 Difference]: Finished difference Result 16297 states and 53481 transitions. [2021-02-19 20:27:50,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-02-19 20:27:50,680 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:27:50,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:27:50,706 INFO L225 Difference]: With dead ends: 16297 [2021-02-19 20:27:50,706 INFO L226 Difference]: Without dead ends: 15916 [2021-02-19 20:27:50,707 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1370 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=1044, Invalid=3786, Unknown=0, NotChecked=0, Total=4830 [2021-02-19 20:27:50,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15916 states. [2021-02-19 20:27:50,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15916 to 10158. [2021-02-19 20:27:50,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10158 states, 10157 states have (on average 3.348921925765482) internal successors, (34015), 10157 states have internal predecessors, (34015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:27:50,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10158 states to 10158 states and 34015 transitions. [2021-02-19 20:27:50,878 INFO L78 Accepts]: Start accepts. Automaton has 10158 states and 34015 transitions. Word has length 34 [2021-02-19 20:27:50,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:27:50,878 INFO L480 AbstractCegarLoop]: Abstraction has 10158 states and 34015 transitions. [2021-02-19 20:27:50,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:27:50,878 INFO L276 IsEmpty]: Start isEmpty. Operand 10158 states and 34015 transitions. [2021-02-19 20:27:50,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:27:50,890 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:27:50,890 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:27:51,090 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable466 [2021-02-19 20:27:51,090 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:27:51,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:27:51,090 INFO L82 PathProgramCache]: Analyzing trace with hash 736099063, now seen corresponding path program 32 times [2021-02-19 20:27:51,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:27:51,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114193596] [2021-02-19 20:27:51,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:27:51,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:27:51,523 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:27:51,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114193596] [2021-02-19 20:27:51,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838342012] [2021-02-19 20:27:51,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:27:51,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:27:51,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:27:51,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 20:27:51,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:27:52,131 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-02-19 20:27:52,475 WARN L202 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2021-02-19 20:27:52,840 WARN L202 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 68 [2021-02-19 20:27:52,938 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:27:52,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:27:52,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 34 [2021-02-19 20:27:52,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961384458] [2021-02-19 20:27:52,939 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 20:27:52,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:27:52,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 20:27:52,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=900, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 20:27:52,939 INFO L87 Difference]: Start difference. First operand 10158 states and 34015 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:27:53,815 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-02-19 20:27:54,301 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-02-19 20:27:54,814 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2021-02-19 20:27:55,163 WARN L202 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2021-02-19 20:27:55,633 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2021-02-19 20:27:55,864 WARN L202 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-02-19 20:27:56,172 WARN L202 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 73 [2021-02-19 20:27:56,730 WARN L202 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2021-02-19 20:27:57,060 WARN L202 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 76 [2021-02-19 20:27:57,277 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2021-02-19 20:27:57,681 WARN L202 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-02-19 20:27:58,241 WARN L202 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2021-02-19 20:27:58,498 WARN L202 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 66 [2021-02-19 20:27:58,790 WARN L202 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-02-19 20:27:58,973 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-02-19 20:27:59,207 WARN L202 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2021-02-19 20:27:59,537 WARN L202 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 77 [2021-02-19 20:27:59,888 WARN L202 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 77 [2021-02-19 20:28:00,179 WARN L202 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2021-02-19 20:28:00,694 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 32 [2021-02-19 20:28:01,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:28:01,031 INFO L93 Difference]: Finished difference Result 19991 states and 65028 transitions. [2021-02-19 20:28:01,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-02-19 20:28:01,032 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:28:01,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:28:01,065 INFO L225 Difference]: With dead ends: 19991 [2021-02-19 20:28:01,065 INFO L226 Difference]: Without dead ends: 19643 [2021-02-19 20:28:01,066 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2663 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=1992, Invalid=6380, Unknown=0, NotChecked=0, Total=8372 [2021-02-19 20:28:01,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19643 states. [2021-02-19 20:28:01,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19643 to 10332. [2021-02-19 20:28:01,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10332 states, 10331 states have (on average 3.3502081115090503) internal successors, (34611), 10331 states have internal predecessors, (34611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:28:01,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10332 states to 10332 states and 34611 transitions. [2021-02-19 20:28:01,274 INFO L78 Accepts]: Start accepts. Automaton has 10332 states and 34611 transitions. Word has length 34 [2021-02-19 20:28:01,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:28:01,274 INFO L480 AbstractCegarLoop]: Abstraction has 10332 states and 34611 transitions. [2021-02-19 20:28:01,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:28:01,274 INFO L276 IsEmpty]: Start isEmpty. Operand 10332 states and 34611 transitions. [2021-02-19 20:28:01,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:28:01,286 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:28:01,286 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:28:01,503 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable487 [2021-02-19 20:28:01,503 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:28:01,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:28:01,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1361716345, now seen corresponding path program 33 times [2021-02-19 20:28:01,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:28:01,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114106242] [2021-02-19 20:28:01,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:28:01,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:28:01,861 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:28:01,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114106242] [2021-02-19 20:28:01,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596868339] [2021-02-19 20:28:01,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:28:01,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 20:28:01,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:28:01,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 20:28:01,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:28:02,703 WARN L202 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2021-02-19 20:28:03,042 WARN L202 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2021-02-19 20:28:03,171 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:28:03,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:28:03,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-02-19 20:28:03,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487991432] [2021-02-19 20:28:03,171 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-02-19 20:28:03,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:28:03,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-02-19 20:28:03,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=804, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 20:28:03,172 INFO L87 Difference]: Start difference. First operand 10332 states and 34611 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:28:04,202 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2021-02-19 20:28:04,627 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 39 [2021-02-19 20:28:04,949 WARN L202 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-02-19 20:28:05,323 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-02-19 20:28:05,613 WARN L202 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2021-02-19 20:28:05,765 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2021-02-19 20:28:06,044 WARN L202 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 71 [2021-02-19 20:28:06,297 WARN L202 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2021-02-19 20:28:06,728 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-02-19 20:28:07,012 WARN L202 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2021-02-19 20:28:07,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:28:07,746 INFO L93 Difference]: Finished difference Result 17594 states and 58186 transitions. [2021-02-19 20:28:07,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-02-19 20:28:07,747 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:28:07,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:28:07,775 INFO L225 Difference]: With dead ends: 17594 [2021-02-19 20:28:07,775 INFO L226 Difference]: Without dead ends: 17255 [2021-02-19 20:28:07,776 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1265 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=1002, Invalid=3554, Unknown=0, NotChecked=0, Total=4556 [2021-02-19 20:28:07,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17255 states. [2021-02-19 20:28:07,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17255 to 11161. [2021-02-19 20:28:07,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11161 states, 11160 states have (on average 3.3530465949820787) internal successors, (37420), 11160 states have internal predecessors, (37420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:28:07,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11161 states to 11161 states and 37420 transitions. [2021-02-19 20:28:07,963 INFO L78 Accepts]: Start accepts. Automaton has 11161 states and 37420 transitions. Word has length 34 [2021-02-19 20:28:07,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:28:07,963 INFO L480 AbstractCegarLoop]: Abstraction has 11161 states and 37420 transitions. [2021-02-19 20:28:07,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:28:07,963 INFO L276 IsEmpty]: Start isEmpty. Operand 11161 states and 37420 transitions. [2021-02-19 20:28:07,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:28:07,975 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:28:07,975 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:28:08,176 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable509 [2021-02-19 20:28:08,176 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:28:08,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:28:08,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1468776133, now seen corresponding path program 34 times [2021-02-19 20:28:08,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:28:08,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497177169] [2021-02-19 20:28:08,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:28:08,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:28:08,551 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:28:08,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497177169] [2021-02-19 20:28:08,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002652428] [2021-02-19 20:28:08,551 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:28:08,570 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:28:08,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:28:08,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 20:28:08,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:28:09,124 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-02-19 20:28:09,540 WARN L202 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2021-02-19 20:28:09,897 WARN L202 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2021-02-19 20:28:10,087 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:28:10,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:28:10,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-02-19 20:28:10,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037093480] [2021-02-19 20:28:10,088 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-02-19 20:28:10,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:28:10,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-02-19 20:28:10,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=875, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 20:28:10,088 INFO L87 Difference]: Start difference. First operand 11161 states and 37420 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:28:10,755 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2021-02-19 20:28:11,242 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-02-19 20:28:11,573 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-02-19 20:28:11,740 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2021-02-19 20:28:12,252 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-02-19 20:28:12,879 WARN L202 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2021-02-19 20:28:13,315 WARN L202 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-02-19 20:28:13,721 WARN L202 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2021-02-19 20:28:14,142 WARN L202 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2021-02-19 20:28:14,463 WARN L202 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2021-02-19 20:28:14,705 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 40 [2021-02-19 20:28:14,984 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 47 [2021-02-19 20:28:15,246 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 30 [2021-02-19 20:28:15,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:28:15,904 INFO L93 Difference]: Finished difference Result 19490 states and 64468 transitions. [2021-02-19 20:28:15,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-02-19 20:28:15,905 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:28:15,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:28:15,936 INFO L225 Difference]: With dead ends: 19490 [2021-02-19 20:28:15,937 INFO L226 Difference]: Without dead ends: 19142 [2021-02-19 20:28:15,937 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2017 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=1421, Invalid=5221, Unknown=0, NotChecked=0, Total=6642 [2021-02-19 20:28:15,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19142 states. [2021-02-19 20:28:16,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19142 to 11364. [2021-02-19 20:28:16,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11364 states, 11363 states have (on average 3.351403678606002) internal successors, (38082), 11363 states have internal predecessors, (38082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:28:16,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11364 states to 11364 states and 38082 transitions. [2021-02-19 20:28:16,152 INFO L78 Accepts]: Start accepts. Automaton has 11364 states and 38082 transitions. Word has length 34 [2021-02-19 20:28:16,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:28:16,152 INFO L480 AbstractCegarLoop]: Abstraction has 11364 states and 38082 transitions. [2021-02-19 20:28:16,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:28:16,152 INFO L276 IsEmpty]: Start isEmpty. Operand 11364 states and 38082 transitions. [2021-02-19 20:28:16,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:28:16,165 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:28:16,165 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:28:16,367 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable529,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:28:16,367 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:28:16,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:28:16,367 INFO L82 PathProgramCache]: Analyzing trace with hash -315329853, now seen corresponding path program 35 times [2021-02-19 20:28:16,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:28:16,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159866106] [2021-02-19 20:28:16,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:28:16,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:28:16,589 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:28:16,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159866106] [2021-02-19 20:28:16,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430905925] [2021-02-19 20:28:16,589 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:28:16,610 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 20:28:16,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:28:16,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 20:28:16,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:28:16,842 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2021-02-19 20:28:16,992 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:28:16,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:28:16,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 17 [2021-02-19 20:28:16,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008346] [2021-02-19 20:28:16,993 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 20:28:16,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:28:16,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 20:28:16,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-02-19 20:28:16,993 INFO L87 Difference]: Start difference. First operand 11364 states and 38082 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:28:17,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:28:17,629 INFO L93 Difference]: Finished difference Result 22280 states and 73862 transitions. [2021-02-19 20:28:17,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 20:28:17,631 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:28:17,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:28:17,670 INFO L225 Difference]: With dead ends: 22280 [2021-02-19 20:28:17,670 INFO L226 Difference]: Without dead ends: 22280 [2021-02-19 20:28:17,670 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=278, Invalid=778, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 20:28:17,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22280 states. [2021-02-19 20:28:17,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22280 to 11571. [2021-02-19 20:28:17,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11571 states, 11570 states have (on average 3.3495246326707) internal successors, (38754), 11570 states have internal predecessors, (38754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:28:17,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11571 states to 11571 states and 38754 transitions. [2021-02-19 20:28:17,905 INFO L78 Accepts]: Start accepts. Automaton has 11571 states and 38754 transitions. Word has length 34 [2021-02-19 20:28:17,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:28:17,905 INFO L480 AbstractCegarLoop]: Abstraction has 11571 states and 38754 transitions. [2021-02-19 20:28:17,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:28:17,905 INFO L276 IsEmpty]: Start isEmpty. Operand 11571 states and 38754 transitions. [2021-02-19 20:28:17,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:28:17,918 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:28:17,919 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:28:18,119 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable542 [2021-02-19 20:28:18,119 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:28:18,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:28:18,119 INFO L82 PathProgramCache]: Analyzing trace with hash -534517053, now seen corresponding path program 36 times [2021-02-19 20:28:18,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:28:18,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322660919] [2021-02-19 20:28:18,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:28:18,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:28:18,260 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:28:18,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322660919] [2021-02-19 20:28:18,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766923368] [2021-02-19 20:28:18,260 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:28:18,280 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 20:28:18,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:28:18,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 20:28:18,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:28:18,507 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:28:18,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:28:18,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 18 [2021-02-19 20:28:18,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377682577] [2021-02-19 20:28:18,507 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 20:28:18,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:28:18,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 20:28:18,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-02-19 20:28:18,508 INFO L87 Difference]: Start difference. First operand 11571 states and 38754 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:28:19,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:28:19,489 INFO L93 Difference]: Finished difference Result 15661 states and 51435 transitions. [2021-02-19 20:28:19,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-02-19 20:28:19,490 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:28:19,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:28:19,516 INFO L225 Difference]: With dead ends: 15661 [2021-02-19 20:28:19,516 INFO L226 Difference]: Without dead ends: 15661 [2021-02-19 20:28:19,516 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=598, Invalid=1382, Unknown=0, NotChecked=0, Total=1980 [2021-02-19 20:28:19,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15661 states. [2021-02-19 20:28:19,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15661 to 4495. [2021-02-19 20:28:19,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4495 states, 4494 states have (on average 3.3168669336893637) internal successors, (14906), 4494 states have internal predecessors, (14906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:28:19,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4495 states to 4495 states and 14906 transitions. [2021-02-19 20:28:19,669 INFO L78 Accepts]: Start accepts. Automaton has 4495 states and 14906 transitions. Word has length 34 [2021-02-19 20:28:19,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:28:19,669 INFO L480 AbstractCegarLoop]: Abstraction has 4495 states and 14906 transitions. [2021-02-19 20:28:19,669 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:28:19,669 INFO L276 IsEmpty]: Start isEmpty. Operand 4495 states and 14906 transitions. [2021-02-19 20:28:19,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:28:19,675 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:28:19,675 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:28:19,875 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable549,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:28:19,875 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:28:19,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:28:19,876 INFO L82 PathProgramCache]: Analyzing trace with hash 511365095, now seen corresponding path program 37 times [2021-02-19 20:28:19,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:28:19,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377153030] [2021-02-19 20:28:19,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:28:19,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:28:20,352 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:28:20,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377153030] [2021-02-19 20:28:20,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562751285] [2021-02-19 20:28:20,352 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:28:20,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:28:20,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 20:28:20,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:28:20,990 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-02-19 20:28:21,479 WARN L202 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2021-02-19 20:28:21,893 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:28:21,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:28:21,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-02-19 20:28:21,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437461876] [2021-02-19 20:28:21,893 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-02-19 20:28:21,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:28:21,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-02-19 20:28:21,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1115, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 20:28:21,894 INFO L87 Difference]: Start difference. First operand 4495 states and 14906 transitions. Second operand has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:28:22,845 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2021-02-19 20:28:23,264 WARN L202 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2021-02-19 20:28:23,854 WARN L202 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2021-02-19 20:28:24,463 WARN L202 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 60 [2021-02-19 20:28:25,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:28:25,390 INFO L93 Difference]: Finished difference Result 6194 states and 19767 transitions. [2021-02-19 20:28:25,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-02-19 20:28:25,391 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:28:25,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:28:25,400 INFO L225 Difference]: With dead ends: 6194 [2021-02-19 20:28:25,400 INFO L226 Difference]: Without dead ends: 6143 [2021-02-19 20:28:25,400 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1380 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=976, Invalid=3854, Unknown=0, NotChecked=0, Total=4830 [2021-02-19 20:28:25,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6143 states. [2021-02-19 20:28:25,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6143 to 4529. [2021-02-19 20:28:25,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4529 states, 4528 states have (on average 3.317137809187279) internal successors, (15020), 4528 states have internal predecessors, (15020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:28:25,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4529 states to 4529 states and 15020 transitions. [2021-02-19 20:28:25,455 INFO L78 Accepts]: Start accepts. Automaton has 4529 states and 15020 transitions. Word has length 34 [2021-02-19 20:28:25,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:28:25,455 INFO L480 AbstractCegarLoop]: Abstraction has 4529 states and 15020 transitions. [2021-02-19 20:28:25,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:28:25,455 INFO L276 IsEmpty]: Start isEmpty. Operand 4529 states and 15020 transitions. [2021-02-19 20:28:25,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:28:25,460 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:28:25,460 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:28:25,661 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable556 [2021-02-19 20:28:25,661 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:28:25,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:28:25,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1565534183, now seen corresponding path program 38 times [2021-02-19 20:28:25,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:28:25,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835351707] [2021-02-19 20:28:25,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:28:25,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:28:26,130 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:28:26,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835351707] [2021-02-19 20:28:26,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614922773] [2021-02-19 20:28:26,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:28:26,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:28:26,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:28:26,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 20:28:26,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:28:26,750 WARN L202 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-02-19 20:28:27,133 WARN L202 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2021-02-19 20:28:27,516 WARN L202 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2021-02-19 20:28:27,612 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:28:27,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:28:27,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 33 [2021-02-19 20:28:27,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923878993] [2021-02-19 20:28:27,612 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-02-19 20:28:27,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:28:27,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-02-19 20:28:27,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=889, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 20:28:27,613 INFO L87 Difference]: Start difference. First operand 4529 states and 15020 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:28:28,493 WARN L202 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-02-19 20:28:29,007 WARN L202 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 69 [2021-02-19 20:28:29,512 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2021-02-19 20:28:29,835 WARN L202 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 61 [2021-02-19 20:28:30,511 WARN L202 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 72 [2021-02-19 20:28:31,048 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-02-19 20:28:31,400 WARN L202 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 74 [2021-02-19 20:28:31,721 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2021-02-19 20:28:31,890 WARN L202 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 47 [2021-02-19 20:28:32,458 WARN L202 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-02-19 20:28:32,759 WARN L202 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2021-02-19 20:28:32,986 WARN L202 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2021-02-19 20:28:33,460 WARN L202 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2021-02-19 20:28:33,770 WARN L202 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2021-02-19 20:28:34,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:28:34,516 INFO L93 Difference]: Finished difference Result 8533 states and 26925 transitions. [2021-02-19 20:28:34,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-02-19 20:28:34,517 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:28:34,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:28:34,532 INFO L225 Difference]: With dead ends: 8533 [2021-02-19 20:28:34,532 INFO L226 Difference]: Without dead ends: 8156 [2021-02-19 20:28:34,533 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2120 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=1556, Invalid=5250, Unknown=0, NotChecked=0, Total=6806 [2021-02-19 20:28:34,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8156 states. [2021-02-19 20:28:34,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8156 to 4594. [2021-02-19 20:28:34,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4594 states, 4593 states have (on average 3.3141737426518616) internal successors, (15222), 4593 states have internal predecessors, (15222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:28:34,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4594 states to 4594 states and 15222 transitions. [2021-02-19 20:28:34,608 INFO L78 Accepts]: Start accepts. Automaton has 4594 states and 15222 transitions. Word has length 34 [2021-02-19 20:28:34,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:28:34,608 INFO L480 AbstractCegarLoop]: Abstraction has 4594 states and 15222 transitions. [2021-02-19 20:28:34,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:28:34,608 INFO L276 IsEmpty]: Start isEmpty. Operand 4594 states and 15222 transitions. [2021-02-19 20:28:34,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:28:34,613 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:28:34,613 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:28:34,818 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable568 [2021-02-19 20:28:34,818 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:28:34,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:28:34,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1824003917, now seen corresponding path program 39 times [2021-02-19 20:28:34,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:28:34,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382285374] [2021-02-19 20:28:34,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:28:34,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:28:35,245 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:28:35,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382285374] [2021-02-19 20:28:35,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572625669] [2021-02-19 20:28:35,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:28:35,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 20:28:35,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:28:35,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 20:28:35,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:28:35,661 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-02-19 20:28:36,021 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2021-02-19 20:28:36,320 WARN L202 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2021-02-19 20:28:36,724 WARN L202 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2021-02-19 20:28:36,804 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:28:36,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:28:36,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 33 [2021-02-19 20:28:36,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060530592] [2021-02-19 20:28:36,805 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-02-19 20:28:36,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:28:36,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-02-19 20:28:36,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=917, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 20:28:36,805 INFO L87 Difference]: Start difference. First operand 4594 states and 15222 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:28:37,686 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-02-19 20:28:38,200 WARN L202 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 69 [2021-02-19 20:28:38,876 WARN L202 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2021-02-19 20:28:39,412 WARN L202 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 70 [2021-02-19 20:28:39,886 WARN L202 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-02-19 20:28:40,048 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-02-19 20:28:40,364 WARN L202 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 73 [2021-02-19 20:28:41,092 WARN L202 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2021-02-19 20:28:41,431 WARN L202 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 73 [2021-02-19 20:28:41,688 WARN L202 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2021-02-19 20:28:42,535 WARN L202 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2021-02-19 20:28:43,038 WARN L202 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 75 [2021-02-19 20:28:43,218 WARN L202 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 47 [2021-02-19 20:28:43,361 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 30 [2021-02-19 20:28:43,593 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 25 [2021-02-19 20:28:44,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:28:44,160 INFO L93 Difference]: Finished difference Result 9230 states and 29300 transitions. [2021-02-19 20:28:44,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-02-19 20:28:44,161 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:28:44,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:28:44,176 INFO L225 Difference]: With dead ends: 9230 [2021-02-19 20:28:44,176 INFO L226 Difference]: Without dead ends: 8867 [2021-02-19 20:28:44,177 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2344 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=1401, Invalid=6255, Unknown=0, NotChecked=0, Total=7656 [2021-02-19 20:28:44,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8867 states. [2021-02-19 20:28:44,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8867 to 4763. [2021-02-19 20:28:44,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4763 states, 4762 states have (on average 3.3181436371272572) internal successors, (15801), 4762 states have internal predecessors, (15801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:28:44,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4763 states to 4763 states and 15801 transitions. [2021-02-19 20:28:44,269 INFO L78 Accepts]: Start accepts. Automaton has 4763 states and 15801 transitions. Word has length 34 [2021-02-19 20:28:44,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:28:44,270 INFO L480 AbstractCegarLoop]: Abstraction has 4763 states and 15801 transitions. [2021-02-19 20:28:44,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:28:44,270 INFO L276 IsEmpty]: Start isEmpty. Operand 4763 states and 15801 transitions. [2021-02-19 20:28:44,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:28:44,275 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:28:44,275 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:28:44,475 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable592,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:28:44,475 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:28:44,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:28:44,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1752068229, now seen corresponding path program 40 times [2021-02-19 20:28:44,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:28:44,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357283377] [2021-02-19 20:28:44,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:28:44,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:28:44,907 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:28:44,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357283377] [2021-02-19 20:28:44,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543337784] [2021-02-19 20:28:44,907 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:28:44,927 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:28:44,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:28:44,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 20:28:44,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:28:45,774 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 49 [2021-02-19 20:28:46,048 WARN L202 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-02-19 20:28:46,287 WARN L202 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-02-19 20:28:46,615 WARN L202 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 63 [2021-02-19 20:28:46,816 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:28:46,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:28:46,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-02-19 20:28:46,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528412628] [2021-02-19 20:28:46,816 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-02-19 20:28:46,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:28:46,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-02-19 20:28:46,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1095, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 20:28:46,817 INFO L87 Difference]: Start difference. First operand 4763 states and 15801 transitions. Second operand has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:28:47,397 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 26 [2021-02-19 20:28:47,794 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 42 [2021-02-19 20:28:48,104 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2021-02-19 20:28:49,139 WARN L202 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2021-02-19 20:28:49,328 WARN L202 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2021-02-19 20:28:50,175 WARN L202 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 57 [2021-02-19 20:28:50,418 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 30 [2021-02-19 20:28:50,840 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-02-19 20:28:51,033 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-02-19 20:28:51,434 WARN L202 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 65 [2021-02-19 20:28:51,611 WARN L202 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 41 [2021-02-19 20:28:52,011 WARN L202 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 69 [2021-02-19 20:28:52,273 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 51 [2021-02-19 20:28:52,420 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 38 [2021-02-19 20:28:52,592 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 38 [2021-02-19 20:28:52,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:28:52,801 INFO L93 Difference]: Finished difference Result 6810 states and 21741 transitions. [2021-02-19 20:28:52,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-02-19 20:28:52,802 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:28:52,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:28:52,813 INFO L225 Difference]: With dead ends: 6810 [2021-02-19 20:28:52,814 INFO L226 Difference]: Without dead ends: 6729 [2021-02-19 20:28:52,814 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1841 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=1297, Invalid=5023, Unknown=0, NotChecked=0, Total=6320 [2021-02-19 20:28:52,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6729 states. [2021-02-19 20:28:52,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6729 to 4745. [2021-02-19 20:28:52,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4745 states, 4744 states have (on average 3.323566610455312) internal successors, (15767), 4744 states have internal predecessors, (15767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:28:52,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4745 states to 4745 states and 15767 transitions. [2021-02-19 20:28:52,897 INFO L78 Accepts]: Start accepts. Automaton has 4745 states and 15767 transitions. Word has length 34 [2021-02-19 20:28:52,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:28:52,897 INFO L480 AbstractCegarLoop]: Abstraction has 4745 states and 15767 transitions. [2021-02-19 20:28:52,897 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:28:52,897 INFO L276 IsEmpty]: Start isEmpty. Operand 4745 states and 15767 transitions. [2021-02-19 20:28:52,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:28:52,902 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:28:52,902 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:28:53,103 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable616,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:28:53,103 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:28:53,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:28:53,103 INFO L82 PathProgramCache]: Analyzing trace with hash 2012883063, now seen corresponding path program 41 times [2021-02-19 20:28:53,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:28:53,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683043157] [2021-02-19 20:28:53,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:28:53,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:28:53,535 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:28:53,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683043157] [2021-02-19 20:28:53,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651511081] [2021-02-19 20:28:53,535 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:28:53,555 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 20:28:53,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:28:53,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 20:28:53,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:28:54,285 WARN L202 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-02-19 20:28:54,555 WARN L202 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-02-19 20:28:54,700 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-02-19 20:28:54,959 WARN L202 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-02-19 20:28:55,335 WARN L202 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2021-02-19 20:28:55,556 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:28:55,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:28:55,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-02-19 20:28:55,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228395288] [2021-02-19 20:28:55,557 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-02-19 20:28:55,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:28:55,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-02-19 20:28:55,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=1080, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 20:28:55,557 INFO L87 Difference]: Start difference. First operand 4745 states and 15767 transitions. Second operand has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:28:56,712 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 32 [2021-02-19 20:28:56,896 WARN L202 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 29 [2021-02-19 20:28:57,507 WARN L202 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 58 [2021-02-19 20:28:57,719 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 37 [2021-02-19 20:28:58,011 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 33 [2021-02-19 20:28:58,397 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 28 [2021-02-19 20:28:58,865 WARN L202 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2021-02-19 20:28:59,096 WARN L202 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2021-02-19 20:28:59,264 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 29 [2021-02-19 20:28:59,617 WARN L202 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2021-02-19 20:28:59,883 WARN L202 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 57 [2021-02-19 20:29:00,381 WARN L202 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 44 [2021-02-19 20:29:00,803 WARN L202 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 65 [2021-02-19 20:29:01,062 WARN L202 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-02-19 20:29:01,283 WARN L202 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 43 [2021-02-19 20:29:01,546 WARN L202 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 41 [2021-02-19 20:29:01,808 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 27 [2021-02-19 20:29:01,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:29:01,879 INFO L93 Difference]: Finished difference Result 7630 states and 24453 transitions. [2021-02-19 20:29:01,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-02-19 20:29:01,880 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:29:01,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:29:01,891 INFO L225 Difference]: With dead ends: 7630 [2021-02-19 20:29:01,891 INFO L226 Difference]: Without dead ends: 7555 [2021-02-19 20:29:01,892 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1643 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=1217, Invalid=4483, Unknown=0, NotChecked=0, Total=5700 [2021-02-19 20:29:01,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7555 states. [2021-02-19 20:29:01,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7555 to 4865. [2021-02-19 20:29:01,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4865 states, 4864 states have (on average 3.3283305921052633) internal successors, (16189), 4864 states have internal predecessors, (16189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:29:01,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4865 states to 4865 states and 16189 transitions. [2021-02-19 20:29:01,977 INFO L78 Accepts]: Start accepts. Automaton has 4865 states and 16189 transitions. Word has length 34 [2021-02-19 20:29:01,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:29:01,977 INFO L480 AbstractCegarLoop]: Abstraction has 4865 states and 16189 transitions. [2021-02-19 20:29:01,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:29:01,978 INFO L276 IsEmpty]: Start isEmpty. Operand 4865 states and 16189 transitions. [2021-02-19 20:29:01,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:29:01,983 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:29:01,983 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:29:02,183 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable635,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:29:02,183 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:29:02,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:29:02,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1855799415, now seen corresponding path program 42 times [2021-02-19 20:29:02,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:29:02,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24232200] [2021-02-19 20:29:02,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:29:02,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:29:02,607 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:29:02,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24232200] [2021-02-19 20:29:02,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608422749] [2021-02-19 20:29:02,607 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:29:02,627 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 20:29:02,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:29:02,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 20:29:02,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:29:03,049 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-02-19 20:29:03,452 WARN L202 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2021-02-19 20:29:03,733 WARN L202 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2021-02-19 20:29:04,169 WARN L202 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 66 [2021-02-19 20:29:04,288 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:29:04,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:29:04,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-02-19 20:29:04,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261707131] [2021-02-19 20:29:04,289 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-02-19 20:29:04,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:29:04,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-02-19 20:29:04,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=832, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 20:29:04,290 INFO L87 Difference]: Start difference. First operand 4865 states and 16189 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:29:05,035 WARN L202 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 38 [2021-02-19 20:29:05,253 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 34 [2021-02-19 20:29:05,484 WARN L202 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 43 [2021-02-19 20:29:05,999 WARN L202 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2021-02-19 20:29:06,168 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-02-19 20:29:06,786 WARN L202 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 72 [2021-02-19 20:29:07,123 WARN L202 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2021-02-19 20:29:07,520 WARN L202 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2021-02-19 20:29:07,903 WARN L202 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2021-02-19 20:29:08,341 WARN L202 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2021-02-19 20:29:08,662 WARN L202 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2021-02-19 20:29:08,877 WARN L202 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-02-19 20:29:09,209 WARN L202 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2021-02-19 20:29:09,459 WARN L202 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-02-19 20:29:09,864 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 32 [2021-02-19 20:29:10,082 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 30 [2021-02-19 20:29:10,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:29:10,621 INFO L93 Difference]: Finished difference Result 9314 states and 29855 transitions. [2021-02-19 20:29:10,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-02-19 20:29:10,622 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:29:10,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:29:10,636 INFO L225 Difference]: With dead ends: 9314 [2021-02-19 20:29:10,636 INFO L226 Difference]: Without dead ends: 8901 [2021-02-19 20:29:10,636 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1403 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=889, Invalid=3803, Unknown=0, NotChecked=0, Total=4692 [2021-02-19 20:29:10,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8901 states. [2021-02-19 20:29:10,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8901 to 4749. [2021-02-19 20:29:10,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4749 states, 4748 states have (on average 3.3241364785172705) internal successors, (15783), 4748 states have internal predecessors, (15783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:29:10,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4749 states to 4749 states and 15783 transitions. [2021-02-19 20:29:10,711 INFO L78 Accepts]: Start accepts. Automaton has 4749 states and 15783 transitions. Word has length 34 [2021-02-19 20:29:10,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:29:10,711 INFO L480 AbstractCegarLoop]: Abstraction has 4749 states and 15783 transitions. [2021-02-19 20:29:10,711 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:29:10,711 INFO L276 IsEmpty]: Start isEmpty. Operand 4749 states and 15783 transitions. [2021-02-19 20:29:10,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:29:10,716 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:29:10,716 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:29:10,916 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable646 [2021-02-19 20:29:10,916 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:29:10,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:29:10,917 INFO L82 PathProgramCache]: Analyzing trace with hash 853042919, now seen corresponding path program 43 times [2021-02-19 20:29:10,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:29:10,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441617239] [2021-02-19 20:29:10,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:29:10,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:29:11,376 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:29:11,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441617239] [2021-02-19 20:29:11,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789529795] [2021-02-19 20:29:11,377 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:29:11,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:29:11,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 20:29:11,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:29:12,137 WARN L202 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-02-19 20:29:12,440 WARN L202 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2021-02-19 20:29:12,603 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-02-19 20:29:12,751 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 37 [2021-02-19 20:29:13,082 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:29:13,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:29:13,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-02-19 20:29:13,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812244878] [2021-02-19 20:29:13,083 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 20:29:13,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:29:13,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 20:29:13,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=993, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 20:29:13,084 INFO L87 Difference]: Start difference. First operand 4749 states and 15783 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:29:13,746 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 26 [2021-02-19 20:29:13,935 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 31 [2021-02-19 20:29:14,301 WARN L202 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 66 [2021-02-19 20:29:14,484 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 32 [2021-02-19 20:29:14,934 WARN L202 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2021-02-19 20:29:15,487 WARN L202 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2021-02-19 20:29:15,811 WARN L202 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2021-02-19 20:29:16,783 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 39 [2021-02-19 20:29:17,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:29:17,109 INFO L93 Difference]: Finished difference Result 6107 states and 19749 transitions. [2021-02-19 20:29:17,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-02-19 20:29:17,111 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:29:17,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:29:17,122 INFO L225 Difference]: With dead ends: 6107 [2021-02-19 20:29:17,122 INFO L226 Difference]: Without dead ends: 6035 [2021-02-19 20:29:17,122 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=654, Invalid=2886, Unknown=0, NotChecked=0, Total=3540 [2021-02-19 20:29:17,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6035 states. [2021-02-19 20:29:17,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6035 to 4777. [2021-02-19 20:29:17,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4777 states, 4776 states have (on average 3.3239112227805694) internal successors, (15875), 4776 states have internal predecessors, (15875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:29:17,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4777 states to 4777 states and 15875 transitions. [2021-02-19 20:29:17,186 INFO L78 Accepts]: Start accepts. Automaton has 4777 states and 15875 transitions. Word has length 34 [2021-02-19 20:29:17,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:29:17,186 INFO L480 AbstractCegarLoop]: Abstraction has 4777 states and 15875 transitions. [2021-02-19 20:29:17,186 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:29:17,186 INFO L276 IsEmpty]: Start isEmpty. Operand 4777 states and 15875 transitions. [2021-02-19 20:29:17,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:29:17,191 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:29:17,191 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:29:17,392 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable662 [2021-02-19 20:29:17,392 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:29:17,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:29:17,392 INFO L82 PathProgramCache]: Analyzing trace with hash 633855719, now seen corresponding path program 44 times [2021-02-19 20:29:17,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:29:17,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848613553] [2021-02-19 20:29:17,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:29:17,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:29:17,906 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:29:17,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848613553] [2021-02-19 20:29:17,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294576324] [2021-02-19 20:29:17,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:29:17,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:29:17,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:29:17,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 20:29:17,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:29:18,374 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-02-19 20:29:18,727 WARN L202 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-02-19 20:29:19,041 WARN L202 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2021-02-19 20:29:19,219 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-02-19 20:29:19,732 WARN L202 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 67 [2021-02-19 20:29:19,837 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:29:19,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:29:19,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 33 [2021-02-19 20:29:19,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717208922] [2021-02-19 20:29:19,838 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-02-19 20:29:19,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:29:19,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-02-19 20:29:19,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=890, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 20:29:19,838 INFO L87 Difference]: Start difference. First operand 4777 states and 15875 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:29:20,730 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 25 [2021-02-19 20:29:21,138 WARN L202 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2021-02-19 20:29:21,311 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 28 [2021-02-19 20:29:21,640 WARN L202 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2021-02-19 20:29:21,963 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 31 [2021-02-19 20:29:22,394 WARN L202 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 66 [2021-02-19 20:29:22,721 WARN L202 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-02-19 20:29:22,980 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 32 [2021-02-19 20:29:23,339 WARN L202 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2021-02-19 20:29:23,599 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 35 [2021-02-19 20:29:24,123 WARN L202 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 58 [2021-02-19 20:29:24,648 WARN L202 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 72 [2021-02-19 20:29:24,994 WARN L202 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2021-02-19 20:29:25,305 WARN L202 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-02-19 20:29:25,480 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 33 [2021-02-19 20:29:25,855 WARN L202 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 61 [2021-02-19 20:29:26,293 WARN L202 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 74 [2021-02-19 20:29:26,786 WARN L202 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-02-19 20:29:27,195 WARN L202 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 68 [2021-02-19 20:29:27,644 WARN L202 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2021-02-19 20:29:28,202 WARN L202 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 74 [2021-02-19 20:29:28,527 WARN L202 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2021-02-19 20:29:28,833 WARN L202 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2021-02-19 20:29:29,308 WARN L202 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2021-02-19 20:29:29,757 WARN L202 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2021-02-19 20:29:30,158 WARN L202 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2021-02-19 20:29:30,317 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 27 [2021-02-19 20:29:30,715 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 25 [2021-02-19 20:29:31,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:29:31,292 INFO L93 Difference]: Finished difference Result 9037 states and 28848 transitions. [2021-02-19 20:29:31,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-02-19 20:29:31,293 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:29:31,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:29:31,310 INFO L225 Difference]: With dead ends: 9037 [2021-02-19 20:29:31,310 INFO L226 Difference]: Without dead ends: 8660 [2021-02-19 20:29:31,310 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2600 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=1783, Invalid=5873, Unknown=0, NotChecked=0, Total=7656 [2021-02-19 20:29:31,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8660 states. [2021-02-19 20:29:31,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8660 to 4935. [2021-02-19 20:29:31,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4935 states, 4934 states have (on average 3.330563437373328) internal successors, (16433), 4934 states have internal predecessors, (16433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:29:31,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4935 states to 4935 states and 16433 transitions. [2021-02-19 20:29:31,396 INFO L78 Accepts]: Start accepts. Automaton has 4935 states and 16433 transitions. Word has length 34 [2021-02-19 20:29:31,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:29:31,396 INFO L480 AbstractCegarLoop]: Abstraction has 4935 states and 16433 transitions. [2021-02-19 20:29:31,396 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:29:31,396 INFO L276 IsEmpty]: Start isEmpty. Operand 4935 states and 16433 transitions. [2021-02-19 20:29:31,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:29:31,402 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:29:31,402 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:29:31,603 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable672 [2021-02-19 20:29:31,603 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:29:31,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:29:31,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1342437845, now seen corresponding path program 45 times [2021-02-19 20:29:31,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:29:31,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976559648] [2021-02-19 20:29:31,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:29:31,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:29:32,054 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:29:32,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976559648] [2021-02-19 20:29:32,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662434473] [2021-02-19 20:29:32,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:29:32,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 20:29:32,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:29:32,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 20:29:32,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:29:32,585 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-02-19 20:29:32,964 WARN L202 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-02-19 20:29:33,272 WARN L202 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2021-02-19 20:29:33,723 WARN L202 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 66 [2021-02-19 20:29:33,954 WARN L202 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-02-19 20:29:34,082 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:29:34,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:29:34,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-02-19 20:29:34,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277017524] [2021-02-19 20:29:34,083 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 20:29:34,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:29:34,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 20:29:34,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=786, Unknown=0, NotChecked=0, Total=992 [2021-02-19 20:29:34,083 INFO L87 Difference]: Start difference. First operand 4935 states and 16433 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:29:35,514 WARN L202 SmtUtils]: Spent 458.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 78 [2021-02-19 20:29:35,702 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 28 [2021-02-19 20:29:36,027 WARN L202 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2021-02-19 20:29:36,330 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 31 [2021-02-19 20:29:36,858 WARN L202 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 76 [2021-02-19 20:29:37,167 WARN L202 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 32 [2021-02-19 20:29:37,534 WARN L202 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2021-02-19 20:29:38,013 WARN L202 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 71 [2021-02-19 20:29:38,612 WARN L202 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 77 [2021-02-19 20:29:39,040 WARN L202 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2021-02-19 20:29:39,662 WARN L202 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 77 [2021-02-19 20:29:40,105 WARN L202 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-02-19 20:29:40,568 WARN L202 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2021-02-19 20:29:41,097 WARN L202 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2021-02-19 20:29:41,408 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 27 [2021-02-19 20:29:41,591 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 26 [2021-02-19 20:29:41,809 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 24 [2021-02-19 20:29:42,027 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 25 [2021-02-19 20:29:42,235 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 25 [2021-02-19 20:29:42,410 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 26 [2021-02-19 20:29:42,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:29:42,807 INFO L93 Difference]: Finished difference Result 8732 states and 28120 transitions. [2021-02-19 20:29:42,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-02-19 20:29:42,808 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:29:42,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:29:42,824 INFO L225 Difference]: With dead ends: 8732 [2021-02-19 20:29:42,824 INFO L226 Difference]: Without dead ends: 8236 [2021-02-19 20:29:42,825 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1380 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=1041, Invalid=3929, Unknown=0, NotChecked=0, Total=4970 [2021-02-19 20:29:42,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8236 states. [2021-02-19 20:29:42,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8236 to 5049. [2021-02-19 20:29:42,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5049 states, 5048 states have (on average 3.3333993660855783) internal successors, (16827), 5048 states have internal predecessors, (16827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:29:42,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5049 states to 5049 states and 16827 transitions. [2021-02-19 20:29:42,929 INFO L78 Accepts]: Start accepts. Automaton has 5049 states and 16827 transitions. Word has length 34 [2021-02-19 20:29:42,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:29:42,929 INFO L480 AbstractCegarLoop]: Abstraction has 5049 states and 16827 transitions. [2021-02-19 20:29:42,929 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:29:42,929 INFO L276 IsEmpty]: Start isEmpty. Operand 5049 states and 16827 transitions. [2021-02-19 20:29:42,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:29:42,935 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:29:42,935 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:29:43,135 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable687 [2021-02-19 20:29:43,135 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:29:43,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:29:43,136 INFO L82 PathProgramCache]: Analyzing trace with hash -329467213, now seen corresponding path program 46 times [2021-02-19 20:29:43,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:29:43,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200375473] [2021-02-19 20:29:43,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:29:43,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:29:43,696 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:29:43,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200375473] [2021-02-19 20:29:43,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679433640] [2021-02-19 20:29:43,697 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:29:43,716 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:29:43,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:29:43,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 20:29:43,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:29:44,522 WARN L202 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-02-19 20:29:45,014 WARN L202 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2021-02-19 20:29:45,585 WARN L202 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2021-02-19 20:29:45,741 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2021-02-19 20:29:45,835 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:29:45,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:29:45,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-02-19 20:29:45,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679208472] [2021-02-19 20:29:45,836 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-02-19 20:29:45,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:29:45,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-02-19 20:29:45,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=895, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 20:29:45,837 INFO L87 Difference]: Start difference. First operand 5049 states and 16827 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:29:46,453 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 27 [2021-02-19 20:29:46,666 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 32 [2021-02-19 20:29:46,986 WARN L202 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2021-02-19 20:29:47,512 WARN L202 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2021-02-19 20:29:48,419 WARN L202 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 69 [2021-02-19 20:29:48,845 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 29 [2021-02-19 20:29:49,448 WARN L202 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 68 [2021-02-19 20:29:49,900 WARN L202 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 44 [2021-02-19 20:29:50,477 WARN L202 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2021-02-19 20:29:50,746 WARN L202 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 46 [2021-02-19 20:29:51,057 WARN L202 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 41 [2021-02-19 20:29:51,289 WARN L202 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 30 [2021-02-19 20:29:51,493 WARN L202 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 35 [2021-02-19 20:29:51,745 WARN L202 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 34 [2021-02-19 20:29:52,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:29:52,562 INFO L93 Difference]: Finished difference Result 9354 states and 30206 transitions. [2021-02-19 20:29:52,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-02-19 20:29:52,564 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:29:52,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:29:52,579 INFO L225 Difference]: With dead ends: 9354 [2021-02-19 20:29:52,579 INFO L226 Difference]: Without dead ends: 8950 [2021-02-19 20:29:52,580 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1368 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=864, Invalid=3828, Unknown=0, NotChecked=0, Total=4692 [2021-02-19 20:29:52,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8950 states. [2021-02-19 20:29:52,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8950 to 5063. [2021-02-19 20:29:52,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5063 states, 5062 states have (on average 3.331291979454761) internal successors, (16863), 5062 states have internal predecessors, (16863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:29:52,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5063 states to 5063 states and 16863 transitions. [2021-02-19 20:29:52,663 INFO L78 Accepts]: Start accepts. Automaton has 5063 states and 16863 transitions. Word has length 34 [2021-02-19 20:29:52,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:29:52,663 INFO L480 AbstractCegarLoop]: Abstraction has 5063 states and 16863 transitions. [2021-02-19 20:29:52,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:29:52,663 INFO L276 IsEmpty]: Start isEmpty. Operand 5063 states and 16863 transitions. [2021-02-19 20:29:52,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:29:52,669 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:29:52,669 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:29:52,869 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable702,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:29:52,870 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:29:52,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:29:52,870 INFO L82 PathProgramCache]: Analyzing trace with hash 49938551, now seen corresponding path program 47 times [2021-02-19 20:29:52,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:29:52,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948688961] [2021-02-19 20:29:52,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:29:52,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:29:53,340 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:29:53,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948688961] [2021-02-19 20:29:53,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529446110] [2021-02-19 20:29:53,340 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:29:53,360 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 20:29:53,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:29:53,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 20:29:53,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:29:54,056 WARN L202 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-02-19 20:29:54,709 WARN L202 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2021-02-19 20:29:54,885 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 37 [2021-02-19 20:29:55,216 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-02-19 20:29:55,296 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:29:55,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:29:55,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-02-19 20:29:55,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489431464] [2021-02-19 20:29:55,297 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 20:29:55,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:29:55,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 20:29:55,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=984, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 20:29:55,298 INFO L87 Difference]: Start difference. First operand 5063 states and 16863 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:29:56,574 WARN L202 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2021-02-19 20:29:56,972 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 32 [2021-02-19 20:29:57,322 WARN L202 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-02-19 20:29:57,592 WARN L202 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2021-02-19 20:29:57,833 WARN L202 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2021-02-19 20:29:58,281 WARN L202 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2021-02-19 20:29:58,815 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 29 [2021-02-19 20:29:59,531 WARN L202 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2021-02-19 20:29:59,914 WARN L202 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2021-02-19 20:30:00,338 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2021-02-19 20:30:00,691 WARN L202 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2021-02-19 20:30:00,958 WARN L202 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-02-19 20:30:01,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:30:01,216 INFO L93 Difference]: Finished difference Result 8127 states and 26353 transitions. [2021-02-19 20:30:01,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-02-19 20:30:01,218 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:30:01,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:30:01,233 INFO L225 Difference]: With dead ends: 8127 [2021-02-19 20:30:01,233 INFO L226 Difference]: Without dead ends: 8055 [2021-02-19 20:30:01,234 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1130 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=758, Invalid=3402, Unknown=0, NotChecked=0, Total=4160 [2021-02-19 20:30:01,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8055 states. [2021-02-19 20:30:01,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8055 to 5605. [2021-02-19 20:30:01,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5605 states, 5604 states have (on average 3.3345824411134903) internal successors, (18687), 5604 states have internal predecessors, (18687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:30:01,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5605 states to 5605 states and 18687 transitions. [2021-02-19 20:30:01,324 INFO L78 Accepts]: Start accepts. Automaton has 5605 states and 18687 transitions. Word has length 34 [2021-02-19 20:30:01,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:30:01,324 INFO L480 AbstractCegarLoop]: Abstraction has 5605 states and 18687 transitions. [2021-02-19 20:30:01,324 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:30:01,324 INFO L276 IsEmpty]: Start isEmpty. Operand 5605 states and 18687 transitions. [2021-02-19 20:30:01,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:30:01,332 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:30:01,332 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:30:01,546 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable713 [2021-02-19 20:30:01,546 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:30:01,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:30:01,546 INFO L82 PathProgramCache]: Analyzing trace with hash -169248649, now seen corresponding path program 48 times [2021-02-19 20:30:01,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:30:01,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058385509] [2021-02-19 20:30:01,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:30:01,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:30:02,166 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:30:02,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058385509] [2021-02-19 20:30:02,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603745912] [2021-02-19 20:30:02,166 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:30:02,210 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 20:30:02,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:30:02,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 20:30:02,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:30:02,793 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-02-19 20:30:03,083 WARN L202 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-02-19 20:30:03,239 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-02-19 20:30:03,392 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-02-19 20:30:03,767 WARN L202 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-02-19 20:30:04,318 WARN L202 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2021-02-19 20:30:04,455 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:30:04,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:30:04,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 33 [2021-02-19 20:30:04,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904222064] [2021-02-19 20:30:04,456 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-02-19 20:30:04,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:30:04,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-02-19 20:30:04,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=885, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 20:30:04,456 INFO L87 Difference]: Start difference. First operand 5605 states and 18687 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:30:04,717 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 27 [2021-02-19 20:30:05,023 WARN L202 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2021-02-19 20:30:05,547 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 32 [2021-02-19 20:30:05,867 WARN L202 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 34 [2021-02-19 20:30:06,361 WARN L202 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2021-02-19 20:30:06,610 WARN L202 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 33 [2021-02-19 20:30:06,915 WARN L202 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 45 [2021-02-19 20:30:07,283 WARN L202 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 36 [2021-02-19 20:30:07,746 WARN L202 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2021-02-19 20:30:08,128 WARN L202 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2021-02-19 20:30:08,624 WARN L202 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 66 [2021-02-19 20:30:08,827 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 34 [2021-02-19 20:30:09,308 WARN L202 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2021-02-19 20:30:09,623 WARN L202 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2021-02-19 20:30:10,141 WARN L202 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2021-02-19 20:30:10,527 WARN L202 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 65 [2021-02-19 20:30:10,853 WARN L202 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2021-02-19 20:30:11,318 WARN L202 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 64 [2021-02-19 20:30:11,803 WARN L202 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 68 [2021-02-19 20:30:12,133 WARN L202 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-02-19 20:30:12,605 WARN L202 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 57 [2021-02-19 20:30:13,378 WARN L202 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-02-19 20:30:14,027 WARN L202 SmtUtils]: Spent 458.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 66 [2021-02-19 20:30:14,384 WARN L202 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2021-02-19 20:30:14,854 WARN L202 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2021-02-19 20:30:15,368 WARN L202 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2021-02-19 20:30:15,529 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 27 [2021-02-19 20:30:15,870 WARN L202 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 32 [2021-02-19 20:30:16,255 WARN L202 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 30 [2021-02-19 20:30:16,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:30:16,769 INFO L93 Difference]: Finished difference Result 10197 states and 32646 transitions. [2021-02-19 20:30:16,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-02-19 20:30:16,770 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:30:16,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:30:16,787 INFO L225 Difference]: With dead ends: 10197 [2021-02-19 20:30:16,788 INFO L226 Difference]: Without dead ends: 9791 [2021-02-19 20:30:16,788 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2051 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=1370, Invalid=5110, Unknown=0, NotChecked=0, Total=6480 [2021-02-19 20:30:16,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9791 states. [2021-02-19 20:30:16,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9791 to 5956. [2021-02-19 20:30:16,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5956 states, 5955 states have (on average 3.339378673383711) internal successors, (19886), 5955 states have internal predecessors, (19886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:30:16,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5956 states to 5956 states and 19886 transitions. [2021-02-19 20:30:16,887 INFO L78 Accepts]: Start accepts. Automaton has 5956 states and 19886 transitions. Word has length 34 [2021-02-19 20:30:16,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:30:16,887 INFO L480 AbstractCegarLoop]: Abstraction has 5956 states and 19886 transitions. [2021-02-19 20:30:16,887 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:30:16,888 INFO L276 IsEmpty]: Start isEmpty. Operand 5956 states and 19886 transitions. [2021-02-19 20:30:16,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:30:16,895 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:30:16,895 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:30:17,095 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable724,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:30:17,095 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:30:17,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:30:17,095 INFO L82 PathProgramCache]: Analyzing trace with hash 376109243, now seen corresponding path program 49 times [2021-02-19 20:30:17,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:30:17,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220861938] [2021-02-19 20:30:17,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:30:17,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:30:17,718 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:30:17,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220861938] [2021-02-19 20:30:17,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880980611] [2021-02-19 20:30:17,718 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:30:17,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:30:17,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 20:30:17,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:30:18,452 WARN L202 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-02-19 20:30:18,885 WARN L202 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2021-02-19 20:30:19,270 WARN L202 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 57 [2021-02-19 20:30:19,481 WARN L202 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-02-19 20:30:19,839 WARN L202 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-02-19 20:30:20,333 WARN L202 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2021-02-19 20:30:20,505 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-02-19 20:30:20,602 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:30:20,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:30:20,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-02-19 20:30:20,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867465408] [2021-02-19 20:30:20,603 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-02-19 20:30:20,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:30:20,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-02-19 20:30:20,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=1080, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 20:30:20,604 INFO L87 Difference]: Start difference. First operand 5956 states and 19886 transitions. Second operand has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:30:21,170 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 28 [2021-02-19 20:30:21,561 WARN L202 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 29 [2021-02-19 20:30:21,807 WARN L202 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-02-19 20:30:21,993 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 26 [2021-02-19 20:30:22,203 WARN L202 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 33 [2021-02-19 20:30:22,529 WARN L202 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 41 [2021-02-19 20:30:22,881 WARN L202 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2021-02-19 20:30:23,164 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 34 [2021-02-19 20:30:23,399 WARN L202 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 27 [2021-02-19 20:30:23,612 WARN L202 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 34 [2021-02-19 20:30:24,172 WARN L202 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2021-02-19 20:30:24,579 WARN L202 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2021-02-19 20:30:24,819 WARN L202 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-02-19 20:30:25,237 WARN L202 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 37 [2021-02-19 20:30:25,710 WARN L202 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2021-02-19 20:30:26,397 WARN L202 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2021-02-19 20:30:26,634 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 26 [2021-02-19 20:30:26,811 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 35 [2021-02-19 20:30:27,299 WARN L202 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2021-02-19 20:30:27,765 WARN L202 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 69 [2021-02-19 20:30:28,131 WARN L202 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 57 [2021-02-19 20:30:28,566 WARN L202 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 40 [2021-02-19 20:30:28,962 WARN L202 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-02-19 20:30:29,293 WARN L202 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-02-19 20:30:30,007 WARN L202 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 44 [2021-02-19 20:30:30,320 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 24 [2021-02-19 20:30:30,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:30:30,458 INFO L93 Difference]: Finished difference Result 8631 states and 27922 transitions. [2021-02-19 20:30:30,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-02-19 20:30:30,460 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:30:30,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:30:30,476 INFO L225 Difference]: With dead ends: 8631 [2021-02-19 20:30:30,476 INFO L226 Difference]: Without dead ends: 8556 [2021-02-19 20:30:30,476 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1721 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=1319, Invalid=4687, Unknown=0, NotChecked=0, Total=6006 [2021-02-19 20:30:30,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8556 states. [2021-02-19 20:30:30,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8556 to 6002. [2021-02-19 20:30:30,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6002 states, 6001 states have (on average 3.341109815030828) internal successors, (20050), 6001 states have internal predecessors, (20050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:30:30,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6002 states to 6002 states and 20050 transitions. [2021-02-19 20:30:30,567 INFO L78 Accepts]: Start accepts. Automaton has 6002 states and 20050 transitions. Word has length 34 [2021-02-19 20:30:30,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:30:30,567 INFO L480 AbstractCegarLoop]: Abstraction has 6002 states and 20050 transitions. [2021-02-19 20:30:30,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:30:30,567 INFO L276 IsEmpty]: Start isEmpty. Operand 6002 states and 20050 transitions. [2021-02-19 20:30:30,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:30:30,574 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:30:30,574 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:30:30,775 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable741 [2021-02-19 20:30:30,775 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:30:30,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:30:30,775 INFO L82 PathProgramCache]: Analyzing trace with hash 219025595, now seen corresponding path program 50 times [2021-02-19 20:30:30,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:30:30,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073554534] [2021-02-19 20:30:30,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:30:30,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:30:31,456 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:30:31,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073554534] [2021-02-19 20:30:31,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537240794] [2021-02-19 20:30:31,457 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:30:31,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:30:31,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:30:31,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 20:30:31,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:30:32,209 WARN L202 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-02-19 20:30:32,692 WARN L202 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-02-19 20:30:33,117 WARN L202 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2021-02-19 20:30:33,762 WARN L202 SmtUtils]: Spent 454.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2021-02-19 20:30:33,921 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:30:33,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:30:33,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-02-19 20:30:33,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244645638] [2021-02-19 20:30:33,922 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-02-19 20:30:33,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:30:33,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-02-19 20:30:33,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=835, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 20:30:33,922 INFO L87 Difference]: Start difference. First operand 6002 states and 20050 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:30:34,440 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 28 [2021-02-19 20:30:34,888 WARN L202 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-02-19 20:30:35,169 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 26 [2021-02-19 20:30:35,383 WARN L202 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 33 [2021-02-19 20:30:35,850 WARN L202 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2021-02-19 20:30:36,054 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 34 [2021-02-19 20:30:36,639 WARN L202 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2021-02-19 20:30:36,887 WARN L202 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-02-19 20:30:37,696 WARN L202 SmtUtils]: Spent 466.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2021-02-19 20:30:38,267 WARN L202 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2021-02-19 20:30:38,756 WARN L202 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 69 [2021-02-19 20:30:39,307 WARN L202 SmtUtils]: Spent 470.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2021-02-19 20:30:39,728 WARN L202 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-02-19 20:30:40,318 WARN L202 SmtUtils]: Spent 464.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2021-02-19 20:30:40,856 WARN L202 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-02-19 20:30:41,532 WARN L202 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2021-02-19 20:30:41,772 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 27 [2021-02-19 20:30:42,000 WARN L202 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 32 [2021-02-19 20:30:42,318 WARN L202 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 31 [2021-02-19 20:30:42,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:30:42,864 INFO L93 Difference]: Finished difference Result 11278 states and 36638 transitions. [2021-02-19 20:30:42,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-02-19 20:30:42,867 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:30:42,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:30:42,889 INFO L225 Difference]: With dead ends: 11278 [2021-02-19 20:30:42,889 INFO L226 Difference]: Without dead ends: 10939 [2021-02-19 20:30:42,890 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1294 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=949, Invalid=3607, Unknown=0, NotChecked=0, Total=4556 [2021-02-19 20:30:42,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10939 states. [2021-02-19 20:30:42,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10939 to 5980. [2021-02-19 20:30:42,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5980 states, 5979 states have (on average 3.3400234152868373) internal successors, (19970), 5979 states have internal predecessors, (19970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:30:43,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5980 states to 5980 states and 19970 transitions. [2021-02-19 20:30:43,008 INFO L78 Accepts]: Start accepts. Automaton has 5980 states and 19970 transitions. Word has length 34 [2021-02-19 20:30:43,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:30:43,008 INFO L480 AbstractCegarLoop]: Abstraction has 5980 states and 19970 transitions. [2021-02-19 20:30:43,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:30:43,009 INFO L276 IsEmpty]: Start isEmpty. Operand 5980 states and 19970 transitions. [2021-02-19 20:30:43,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:30:43,017 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:30:43,017 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:30:43,217 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable753 [2021-02-19 20:30:43,217 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:30:43,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:30:43,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1814304691, now seen corresponding path program 51 times [2021-02-19 20:30:43,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:30:43,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293383727] [2021-02-19 20:30:43,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:30:43,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:30:44,116 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:30:44,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293383727] [2021-02-19 20:30:44,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956922246] [2021-02-19 20:30:44,117 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:30:44,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 20:30:44,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:30:44,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 20:30:44,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:30:45,037 WARN L202 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-02-19 20:30:45,406 WARN L202 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-02-19 20:30:45,965 WARN L202 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2021-02-19 20:30:46,707 WARN L202 SmtUtils]: Spent 506.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 67 [2021-02-19 20:30:46,900 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:30:46,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:30:46,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16] total 35 [2021-02-19 20:30:46,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246719146] [2021-02-19 20:30:46,901 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-02-19 20:30:46,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:30:46,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-02-19 20:30:46,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=1009, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 20:30:46,901 INFO L87 Difference]: Start difference. First operand 5980 states and 19970 transitions. Second operand has 36 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 35 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:30:47,268 WARN L202 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 28 [2021-02-19 20:30:47,431 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 22 [2021-02-19 20:30:47,939 WARN L202 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 31 [2021-02-19 20:30:48,657 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 26 [2021-02-19 20:30:48,890 WARN L202 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-02-19 20:30:49,655 WARN L202 SmtUtils]: Spent 566.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 65 [2021-02-19 20:30:50,029 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 25 [2021-02-19 20:30:50,315 WARN L202 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 35 [2021-02-19 20:30:50,460 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 27 [2021-02-19 20:30:51,139 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 32 [2021-02-19 20:30:51,583 WARN L202 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2021-02-19 20:30:51,788 WARN L202 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 37 [2021-02-19 20:30:52,423 WARN L202 SmtUtils]: Spent 599.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 64 [2021-02-19 20:30:52,996 WARN L202 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 64 [2021-02-19 20:30:53,571 WARN L202 SmtUtils]: Spent 508.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-02-19 20:30:54,148 WARN L202 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 33 [2021-02-19 20:30:54,324 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 24 [2021-02-19 20:30:54,506 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 28 [2021-02-19 20:30:54,997 WARN L202 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2021-02-19 20:30:55,616 WARN L202 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 34 [2021-02-19 20:30:55,959 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 25 [2021-02-19 20:30:56,150 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-02-19 20:30:56,739 WARN L202 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-02-19 20:30:57,045 WARN L202 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2021-02-19 20:30:57,346 WARN L202 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 47 [2021-02-19 20:30:57,762 WARN L202 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-02-19 20:30:58,509 WARN L202 SmtUtils]: Spent 517.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2021-02-19 20:30:59,392 WARN L202 SmtUtils]: Spent 828.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 74 [2021-02-19 20:31:00,149 WARN L202 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 47 [2021-02-19 20:31:00,832 WARN L202 SmtUtils]: Spent 555.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-02-19 20:31:01,980 WARN L202 SmtUtils]: Spent 919.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 75 [2021-02-19 20:31:02,144 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 26 [2021-02-19 20:31:02,498 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-02-19 20:31:02,937 WARN L202 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2021-02-19 20:31:03,376 WARN L202 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2021-02-19 20:31:03,787 WARN L202 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2021-02-19 20:31:04,741 WARN L202 SmtUtils]: Spent 519.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2021-02-19 20:31:05,459 WARN L202 SmtUtils]: Spent 498.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2021-02-19 20:31:06,044 WARN L202 SmtUtils]: Spent 503.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2021-02-19 20:31:06,642 WARN L202 SmtUtils]: Spent 518.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 75 [2021-02-19 20:31:06,824 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 26 [2021-02-19 20:31:07,461 WARN L202 SmtUtils]: Spent 541.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 76 [2021-02-19 20:31:07,726 WARN L202 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 30 [2021-02-19 20:31:07,991 WARN L202 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 34 [2021-02-19 20:31:08,261 WARN L202 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 29 [2021-02-19 20:31:08,557 WARN L202 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 30 [2021-02-19 20:31:09,125 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 26 [2021-02-19 20:31:09,420 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 23 [2021-02-19 20:31:09,665 WARN L202 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 31 [2021-02-19 20:31:10,097 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2021-02-19 20:31:10,258 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 26 [2021-02-19 20:31:10,703 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 28 [2021-02-19 20:31:10,961 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 27 [2021-02-19 20:31:11,173 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 26 [2021-02-19 20:31:11,375 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 27 [2021-02-19 20:31:11,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:31:11,612 INFO L93 Difference]: Finished difference Result 13162 states and 41782 transitions. [2021-02-19 20:31:11,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2021-02-19 20:31:11,613 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 35 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:31:11,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:31:11,638 INFO L225 Difference]: With dead ends: 13162 [2021-02-19 20:31:11,638 INFO L226 Difference]: Without dead ends: 12564 [2021-02-19 20:31:11,639 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6910 ImplicationChecksByTransitivity, 24.9s TimeCoverageRelationStatistics Valid=3226, Invalid=15680, Unknown=0, NotChecked=0, Total=18906 [2021-02-19 20:31:11,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12564 states. [2021-02-19 20:31:11,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12564 to 6510. [2021-02-19 20:31:11,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6510 states, 6509 states have (on average 3.347979720387156) internal successors, (21792), 6509 states have internal predecessors, (21792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:31:11,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6510 states to 6510 states and 21792 transitions. [2021-02-19 20:31:11,759 INFO L78 Accepts]: Start accepts. Automaton has 6510 states and 21792 transitions. Word has length 34 [2021-02-19 20:31:11,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:31:11,759 INFO L480 AbstractCegarLoop]: Abstraction has 6510 states and 21792 transitions. [2021-02-19 20:31:11,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 35 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:31:11,759 INFO L276 IsEmpty]: Start isEmpty. Operand 6510 states and 21792 transitions. [2021-02-19 20:31:11,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:31:11,768 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:31:11,768 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:31:11,968 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable768,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:31:11,968 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:31:11,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:31:11,968 INFO L82 PathProgramCache]: Analyzing trace with hash -331475081, now seen corresponding path program 52 times [2021-02-19 20:31:11,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:31:11,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074530389] [2021-02-19 20:31:11,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:31:11,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:31:12,764 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:31:12,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074530389] [2021-02-19 20:31:12,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457928240] [2021-02-19 20:31:12,764 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:31:12,783 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:31:12,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:31:12,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 20:31:12,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:31:13,695 WARN L202 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-02-19 20:31:14,131 WARN L202 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-02-19 20:31:14,639 WARN L202 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2021-02-19 20:31:14,883 WARN L202 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-02-19 20:31:15,342 WARN L202 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-02-19 20:31:15,938 WARN L202 SmtUtils]: Spent 509.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2021-02-19 20:31:16,163 WARN L202 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-02-19 20:31:16,283 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:31:16,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:31:16,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-02-19 20:31:16,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859974162] [2021-02-19 20:31:16,284 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-02-19 20:31:16,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:31:16,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-02-19 20:31:16,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=1162, Unknown=0, NotChecked=0, Total=1406 [2021-02-19 20:31:16,284 INFO L87 Difference]: Start difference. First operand 6510 states and 21792 transitions. Second operand has 38 states, 38 states have (on average 1.736842105263158) internal successors, (66), 37 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:31:16,722 WARN L202 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 28 [2021-02-19 20:31:17,850 WARN L202 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 21 [2021-02-19 20:31:18,196 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 26 [2021-02-19 20:31:18,534 WARN L202 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-02-19 20:31:18,722 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 28 [2021-02-19 20:31:19,313 WARN L202 SmtUtils]: Spent 503.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2021-02-19 20:31:19,589 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 25 [2021-02-19 20:31:19,963 WARN L202 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 37 [2021-02-19 20:31:20,259 WARN L202 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 27 [2021-02-19 20:31:20,571 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2021-02-19 20:31:21,275 WARN L202 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 34 [2021-02-19 20:31:22,060 WARN L202 SmtUtils]: Spent 533.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 68 [2021-02-19 20:31:22,339 WARN L202 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 37 [2021-02-19 20:31:22,766 WARN L202 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2021-02-19 20:31:23,284 WARN L202 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2021-02-19 20:31:23,445 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-02-19 20:31:24,026 WARN L202 SmtUtils]: Spent 520.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 52 [2021-02-19 20:31:24,542 WARN L202 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 26 [2021-02-19 20:31:24,778 WARN L202 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 35 [2021-02-19 20:31:24,966 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 24 [2021-02-19 20:31:25,162 WARN L202 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 28 [2021-02-19 20:31:25,796 WARN L202 SmtUtils]: Spent 489.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2021-02-19 20:31:26,354 WARN L202 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2021-02-19 20:31:26,804 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 22 [2021-02-19 20:31:27,059 WARN L202 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 34 [2021-02-19 20:31:27,436 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 25 [2021-02-19 20:31:27,898 WARN L202 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 43 [2021-02-19 20:31:28,408 WARN L202 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 63 [2021-02-19 20:31:28,958 WARN L202 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2021-02-19 20:31:29,741 WARN L202 SmtUtils]: Spent 513.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 68 [2021-02-19 20:31:30,430 WARN L202 SmtUtils]: Spent 580.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 74 [2021-02-19 20:31:31,205 WARN L202 SmtUtils]: Spent 536.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 65 [2021-02-19 20:31:31,775 WARN L202 SmtUtils]: Spent 489.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2021-02-19 20:31:32,303 WARN L202 SmtUtils]: Spent 430.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 58 [2021-02-19 20:31:32,501 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 25 [2021-02-19 20:31:32,990 WARN L202 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2021-02-19 20:31:33,647 WARN L202 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 44 [2021-02-19 20:31:33,944 WARN L202 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 40 [2021-02-19 20:31:34,441 WARN L202 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2021-02-19 20:31:34,783 WARN L202 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-02-19 20:31:35,774 WARN L202 SmtUtils]: Spent 303.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-02-19 20:31:36,184 WARN L202 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 24 [2021-02-19 20:31:36,499 WARN L202 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 30 [2021-02-19 20:31:36,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:31:36,861 INFO L93 Difference]: Finished difference Result 11860 states and 38152 transitions. [2021-02-19 20:31:36,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-02-19 20:31:36,864 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.736842105263158) internal successors, (66), 37 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:31:36,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:31:36,886 INFO L225 Difference]: With dead ends: 11860 [2021-02-19 20:31:36,886 INFO L226 Difference]: Without dead ends: 11779 [2021-02-19 20:31:36,887 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4391 ImplicationChecksByTransitivity, 21.6s TimeCoverageRelationStatistics Valid=2503, Invalid=10607, Unknown=0, NotChecked=0, Total=13110 [2021-02-19 20:31:36,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11779 states. [2021-02-19 20:31:36,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11779 to 6529. [2021-02-19 20:31:36,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6529 states, 6528 states have (on average 3.3514093137254903) internal successors, (21878), 6528 states have internal predecessors, (21878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:31:37,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6529 states to 6529 states and 21878 transitions. [2021-02-19 20:31:37,009 INFO L78 Accepts]: Start accepts. Automaton has 6529 states and 21878 transitions. Word has length 34 [2021-02-19 20:31:37,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:31:37,009 INFO L480 AbstractCegarLoop]: Abstraction has 6529 states and 21878 transitions. [2021-02-19 20:31:37,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.736842105263158) internal successors, (66), 37 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:31:37,009 INFO L276 IsEmpty]: Start isEmpty. Operand 6529 states and 21878 transitions. [2021-02-19 20:31:37,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:31:37,018 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:31:37,018 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:31:37,218 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable785 [2021-02-19 20:31:37,218 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:31:37,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:31:37,218 INFO L82 PathProgramCache]: Analyzing trace with hash -488558729, now seen corresponding path program 53 times [2021-02-19 20:31:37,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:31:37,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350107525] [2021-02-19 20:31:37,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:31:37,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:31:38,015 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:31:38,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350107525] [2021-02-19 20:31:38,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442580130] [2021-02-19 20:31:38,016 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:31:38,036 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 20:31:38,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:31:38,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 20:31:38,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:31:39,061 WARN L202 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-02-19 20:31:39,503 WARN L202 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2021-02-19 20:31:40,008 WARN L202 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2021-02-19 20:31:40,759 WARN L202 SmtUtils]: Spent 547.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2021-02-19 20:31:40,993 WARN L202 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-02-19 20:31:41,129 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:31:41,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:31:41,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-02-19 20:31:41,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955019964] [2021-02-19 20:31:41,130 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-02-19 20:31:41,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:31:41,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-02-19 20:31:41,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=906, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 20:31:41,130 INFO L87 Difference]: Start difference. First operand 6529 states and 21878 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:31:41,479 WARN L202 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2021-02-19 20:31:42,142 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 23 [2021-02-19 20:31:42,517 WARN L202 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 26 [2021-02-19 20:31:42,783 WARN L202 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-02-19 20:31:43,514 WARN L202 SmtUtils]: Spent 610.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2021-02-19 20:31:44,061 WARN L202 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 37 [2021-02-19 20:31:44,361 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2021-02-19 20:31:44,801 WARN L202 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 34 [2021-02-19 20:31:45,475 WARN L202 SmtUtils]: Spent 525.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2021-02-19 20:31:45,936 WARN L202 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2021-02-19 20:31:46,111 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-02-19 20:31:46,818 WARN L202 SmtUtils]: Spent 612.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 73 [2021-02-19 20:31:47,154 WARN L202 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 26 [2021-02-19 20:31:47,362 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 24 [2021-02-19 20:31:47,586 WARN L202 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 28 [2021-02-19 20:31:48,171 WARN L202 SmtUtils]: Spent 490.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2021-02-19 20:31:48,731 WARN L202 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 58 [2021-02-19 20:31:48,992 WARN L202 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 25 [2021-02-19 20:31:49,248 WARN L202 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 35 [2021-02-19 20:31:49,665 WARN L202 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 43 [2021-02-19 20:31:49,880 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-02-19 20:31:50,451 WARN L202 SmtUtils]: Spent 509.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2021-02-19 20:31:51,180 WARN L202 SmtUtils]: Spent 630.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 73 [2021-02-19 20:31:51,948 WARN L202 SmtUtils]: Spent 554.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 66 [2021-02-19 20:31:52,681 WARN L202 SmtUtils]: Spent 600.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2021-02-19 20:31:53,265 WARN L202 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 47 [2021-02-19 20:31:53,579 WARN L202 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 40 [2021-02-19 20:31:54,142 WARN L202 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 27 [2021-02-19 20:31:54,513 WARN L202 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 32 [2021-02-19 20:31:54,861 WARN L202 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 35 [2021-02-19 20:31:55,592 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 27 [2021-02-19 20:31:55,776 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 30 [2021-02-19 20:31:55,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:31:55,911 INFO L93 Difference]: Finished difference Result 12156 states and 39618 transitions. [2021-02-19 20:31:55,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-02-19 20:31:55,914 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:31:55,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:31:55,939 INFO L225 Difference]: With dead ends: 12156 [2021-02-19 20:31:55,940 INFO L226 Difference]: Without dead ends: 11853 [2021-02-19 20:31:55,940 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2196 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=1312, Invalid=5494, Unknown=0, NotChecked=0, Total=6806 [2021-02-19 20:31:55,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11853 states. [2021-02-19 20:31:56,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11853 to 6507. [2021-02-19 20:31:56,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6507 states, 6506 states have (on average 3.3489086996618505) internal successors, (21788), 6506 states have internal predecessors, (21788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:31:56,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6507 states to 6507 states and 21788 transitions. [2021-02-19 20:31:56,120 INFO L78 Accepts]: Start accepts. Automaton has 6507 states and 21788 transitions. Word has length 34 [2021-02-19 20:31:56,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:31:56,120 INFO L480 AbstractCegarLoop]: Abstraction has 6507 states and 21788 transitions. [2021-02-19 20:31:56,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:31:56,120 INFO L276 IsEmpty]: Start isEmpty. Operand 6507 states and 21788 transitions. [2021-02-19 20:31:56,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-02-19 20:31:56,130 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:31:56,130 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:31:56,331 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable797,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:31:56,331 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:31:56,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:31:56,331 INFO L82 PathProgramCache]: Analyzing trace with hash -108153235, now seen corresponding path program 54 times [2021-02-19 20:31:56,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:31:56,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424469860] [2021-02-19 20:31:56,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:31:56,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:31:56,870 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2021-02-19 20:31:57,664 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:31:57,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424469860] [2021-02-19 20:31:57,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661211684] [2021-02-19 20:31:57,664 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:31:57,686 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 20:31:57,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:31:57,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 20:31:57,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:31:58,793 WARN L202 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-02-19 20:31:59,408 WARN L202 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2021-02-19 20:31:59,841 WARN L202 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-02-19 20:32:00,748 WARN L202 SmtUtils]: Spent 621.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 82 [2021-02-19 20:32:00,962 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:32:00,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:32:00,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17] total 36 [2021-02-19 20:32:00,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197597600] [2021-02-19 20:32:00,963 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-02-19 20:32:00,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:32:00,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-02-19 20:32:00,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=1080, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 20:32:00,964 INFO L87 Difference]: Start difference. First operand 6507 states and 21788 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:32:01,316 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 14 [2021-02-19 20:32:01,933 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 25 [2021-02-19 20:32:02,470 WARN L202 SmtUtils]: Spent 449.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 62 [2021-02-19 20:32:02,737 WARN L202 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 30 [2021-02-19 20:32:02,950 WARN L202 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 23 [2021-02-19 20:32:03,237 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-02-19 20:32:03,512 WARN L202 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 34 [2021-02-19 20:32:03,774 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 26 [2021-02-19 20:32:04,283 WARN L202 SmtUtils]: Spent 430.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 60 [2021-02-19 20:32:05,052 WARN L202 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 74 [2021-02-19 20:32:05,334 WARN L202 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2021-02-19 20:32:05,577 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-02-19 20:32:06,060 WARN L202 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2021-02-19 20:32:06,724 WARN L202 SmtUtils]: Spent 564.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 75 [2021-02-19 20:32:07,070 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2021-02-19 20:32:07,306 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2021-02-19 20:32:07,572 WARN L202 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2021-02-19 20:32:07,772 WARN L202 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2021-02-19 20:32:08,020 WARN L202 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2021-02-19 20:32:08,520 WARN L202 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-02-19 20:32:08,723 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-02-19 20:32:09,360 WARN L202 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 72 [2021-02-19 20:32:10,273 WARN L202 SmtUtils]: Spent 705.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 91 [2021-02-19 20:32:10,486 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 31 [2021-02-19 20:32:10,680 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 34 [2021-02-19 20:32:10,926 WARN L202 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-02-19 20:32:11,298 WARN L202 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2021-02-19 20:32:11,654 WARN L202 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 27 [2021-02-19 20:32:11,891 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2021-02-19 20:32:12,584 WARN L202 SmtUtils]: Spent 521.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 78 [2021-02-19 20:32:13,222 WARN L202 SmtUtils]: Spent 574.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 73 [2021-02-19 20:32:14,067 WARN L202 SmtUtils]: Spent 739.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 88 [2021-02-19 20:32:14,941 WARN L202 SmtUtils]: Spent 793.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 89 [2021-02-19 20:32:15,241 WARN L202 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 24 [2021-02-19 20:32:15,641 WARN L202 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 29 [2021-02-19 20:32:15,976 WARN L202 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 25 [2021-02-19 20:32:16,542 WARN L202 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 45 [2021-02-19 20:32:17,273 WARN L202 SmtUtils]: Spent 521.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 71 [2021-02-19 20:32:17,538 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 28 [2021-02-19 20:32:17,783 WARN L202 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 28 [2021-02-19 20:32:18,016 WARN L202 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 22 [2021-02-19 20:32:18,224 WARN L202 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 23 [2021-02-19 20:32:18,521 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 23 [2021-02-19 20:32:18,711 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-02-19 20:32:19,674 WARN L202 SmtUtils]: Spent 710.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 86 [2021-02-19 20:32:20,500 WARN L202 SmtUtils]: Spent 719.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 91 [2021-02-19 20:32:21,345 WARN L202 SmtUtils]: Spent 759.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 87 [2021-02-19 20:32:21,866 WARN L202 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 53 [2021-02-19 20:32:22,828 WARN L202 SmtUtils]: Spent 620.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 86 [2021-02-19 20:32:23,115 WARN L202 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 26 [2021-02-19 20:32:23,739 WARN L202 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 33 [2021-02-19 20:32:24,085 WARN L202 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 27 [2021-02-19 20:32:24,434 WARN L202 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 25 [2021-02-19 20:32:24,778 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 24 [2021-02-19 20:32:25,213 WARN L202 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 23 [2021-02-19 20:32:25,393 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 26 [2021-02-19 20:32:25,673 WARN L202 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 24 [2021-02-19 20:32:25,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:32:25,792 INFO L93 Difference]: Finished difference Result 10097 states and 32246 transitions. [2021-02-19 20:32:25,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-02-19 20:32:25,795 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-02-19 20:32:25,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:32:25,813 INFO L225 Difference]: With dead ends: 10097 [2021-02-19 20:32:25,813 INFO L226 Difference]: Without dead ends: 9746 [2021-02-19 20:32:25,814 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3716 ImplicationChecksByTransitivity, 25.2s TimeCoverageRelationStatistics Valid=2042, Invalid=9730, Unknown=0, NotChecked=0, Total=11772 [2021-02-19 20:32:25,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9746 states. [2021-02-19 20:32:25,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9746 to 7445. [2021-02-19 20:32:25,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7445 states, 7444 states have (on average 3.355722729715207) internal successors, (24980), 7444 states have internal predecessors, (24980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:32:25,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7445 states to 7445 states and 24980 transitions. [2021-02-19 20:32:25,930 INFO L78 Accepts]: Start accepts. Automaton has 7445 states and 24980 transitions. Word has length 36 [2021-02-19 20:32:25,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:32:25,930 INFO L480 AbstractCegarLoop]: Abstraction has 7445 states and 24980 transitions. [2021-02-19 20:32:25,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:32:25,930 INFO L276 IsEmpty]: Start isEmpty. Operand 7445 states and 24980 transitions. [2021-02-19 20:32:25,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-02-19 20:32:25,940 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:32:25,940 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:32:26,141 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable809 [2021-02-19 20:32:26,141 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:32:26,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:32:26,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1263147499, now seen corresponding path program 55 times [2021-02-19 20:32:26,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:32:26,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708740361] [2021-02-19 20:32:26,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:32:26,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:32:26,762 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2021-02-19 20:32:27,514 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:32:27,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708740361] [2021-02-19 20:32:27,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549445705] [2021-02-19 20:32:27,514 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:32:27,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:32:27,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 20:32:27,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:32:28,130 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2021-02-19 20:32:28,693 WARN L202 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-02-19 20:32:29,158 WARN L202 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-02-19 20:32:29,417 WARN L202 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-02-19 20:32:29,671 WARN L202 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-02-19 20:32:30,070 WARN L202 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-02-19 20:32:30,542 WARN L202 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2021-02-19 20:32:30,931 WARN L202 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2021-02-19 20:32:31,409 WARN L202 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2021-02-19 20:32:31,568 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:32:31,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:32:31,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-02-19 20:32:31,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808209059] [2021-02-19 20:32:31,569 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-02-19 20:32:31,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:32:31,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-02-19 20:32:31,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1237, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 20:32:31,569 INFO L87 Difference]: Start difference. First operand 7445 states and 24980 transitions. Second operand has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 38 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:32:32,230 WARN L202 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 14 [2021-02-19 20:32:32,477 WARN L202 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2021-02-19 20:32:32,840 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2021-02-19 20:32:33,081 WARN L202 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 37 [2021-02-19 20:32:33,291 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 25 [2021-02-19 20:32:33,806 WARN L202 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 52 [2021-02-19 20:32:34,068 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 30 [2021-02-19 20:32:34,317 WARN L202 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 26 [2021-02-19 20:32:34,883 WARN L202 SmtUtils]: Spent 487.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 62 [2021-02-19 20:32:35,163 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-02-19 20:32:35,471 WARN L202 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 41 [2021-02-19 20:32:35,783 WARN L202 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 34 [2021-02-19 20:32:36,101 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 26 [2021-02-19 20:32:36,582 WARN L202 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 60 [2021-02-19 20:32:36,770 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 12 [2021-02-19 20:32:37,136 WARN L202 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 42 [2021-02-19 20:32:37,381 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2021-02-19 20:32:37,880 WARN L202 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2021-02-19 20:32:38,095 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 28 [2021-02-19 20:32:38,472 WARN L202 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 48 [2021-02-19 20:32:38,704 WARN L202 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 28 [2021-02-19 20:32:39,039 WARN L202 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 48 [2021-02-19 20:32:39,373 WARN L202 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 46 [2021-02-19 20:32:39,725 WARN L202 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 49 [2021-02-19 20:32:40,927 WARN L202 SmtUtils]: Spent 620.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 72 [2021-02-19 20:32:41,123 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 28 [2021-02-19 20:32:41,457 WARN L202 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 33 [2021-02-19 20:32:41,756 WARN L202 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 28 [2021-02-19 20:32:41,941 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 20 [2021-02-19 20:32:42,193 WARN L202 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 22 [2021-02-19 20:32:42,495 WARN L202 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 24 [2021-02-19 20:32:42,778 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2021-02-19 20:32:43,383 WARN L202 SmtUtils]: Spent 528.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 61 [2021-02-19 20:32:43,915 WARN L202 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 59 [2021-02-19 20:32:44,412 WARN L202 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2021-02-19 20:32:45,164 WARN L202 SmtUtils]: Spent 627.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 73 [2021-02-19 20:32:45,532 WARN L202 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 22 [2021-02-19 20:32:46,275 WARN L202 SmtUtils]: Spent 464.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 42 [2021-02-19 20:32:47,333 WARN L202 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 26 [2021-02-19 20:32:47,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:32:47,518 INFO L93 Difference]: Finished difference Result 9464 states and 30542 transitions. [2021-02-19 20:32:47,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-02-19 20:32:47,521 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 38 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-02-19 20:32:47,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:32:47,541 INFO L225 Difference]: With dead ends: 9464 [2021-02-19 20:32:47,541 INFO L226 Difference]: Without dead ends: 9434 [2021-02-19 20:32:47,542 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2520 ImplicationChecksByTransitivity, 18.3s TimeCoverageRelationStatistics Valid=1424, Invalid=6766, Unknown=0, NotChecked=0, Total=8190 [2021-02-19 20:32:47,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9434 states. [2021-02-19 20:32:47,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9434 to 7528. [2021-02-19 20:32:47,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7528 states, 7527 states have (on average 3.3549887073203135) internal successors, (25253), 7527 states have internal predecessors, (25253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:32:47,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7528 states to 7528 states and 25253 transitions. [2021-02-19 20:32:47,657 INFO L78 Accepts]: Start accepts. Automaton has 7528 states and 25253 transitions. Word has length 36 [2021-02-19 20:32:47,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:32:47,658 INFO L480 AbstractCegarLoop]: Abstraction has 7528 states and 25253 transitions. [2021-02-19 20:32:47,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 38 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:32:47,658 INFO L276 IsEmpty]: Start isEmpty. Operand 7528 states and 25253 transitions. [2021-02-19 20:32:47,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-02-19 20:32:47,668 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:32:47,668 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:32:47,868 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable835 [2021-02-19 20:32:47,868 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:32:47,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:32:47,869 INFO L82 PathProgramCache]: Analyzing trace with hash -208978411, now seen corresponding path program 56 times [2021-02-19 20:32:47,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:32:47,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001273440] [2021-02-19 20:32:47,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:32:47,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:32:48,448 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2021-02-19 20:32:49,260 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:32:49,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001273440] [2021-02-19 20:32:49,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305443201] [2021-02-19 20:32:49,261 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:32:49,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:32:49,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:32:49,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 20:32:49,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:32:49,906 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2021-02-19 20:32:50,476 WARN L202 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-02-19 20:32:50,980 WARN L202 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-02-19 20:32:51,269 WARN L202 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-02-19 20:32:51,826 WARN L202 SmtUtils]: Spent 312.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-02-19 20:32:52,822 WARN L202 SmtUtils]: Spent 734.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 82 [2021-02-19 20:32:53,062 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:32:53,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:32:53,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17] total 36 [2021-02-19 20:32:53,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747639865] [2021-02-19 20:32:53,063 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-02-19 20:32:53,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:32:53,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-02-19 20:32:53,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=1032, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 20:32:53,064 INFO L87 Difference]: Start difference. First operand 7528 states and 25253 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:32:53,795 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2021-02-19 20:32:54,087 WARN L202 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 25 [2021-02-19 20:32:54,584 WARN L202 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 52 [2021-02-19 20:32:54,864 WARN L202 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 30 [2021-02-19 20:32:55,134 WARN L202 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 23 [2021-02-19 20:32:55,712 WARN L202 SmtUtils]: Spent 493.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 60 [2021-02-19 20:32:56,061 WARN L202 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-02-19 20:32:56,411 WARN L202 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 40 [2021-02-19 20:32:56,717 WARN L202 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 34 [2021-02-19 20:32:57,515 WARN L202 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2021-02-19 20:32:58,252 WARN L202 SmtUtils]: Spent 624.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 72 [2021-02-19 20:32:58,798 WARN L202 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 41 [2021-02-19 20:32:59,108 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2021-02-19 20:32:59,665 WARN L202 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2021-02-19 20:33:00,454 WARN L202 SmtUtils]: Spent 675.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 72 [2021-02-19 20:33:00,712 WARN L202 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 30 [2021-02-19 20:33:01,001 WARN L202 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 40 [2021-02-19 20:33:01,319 WARN L202 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-02-19 20:33:01,701 WARN L202 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 47 [2021-02-19 20:33:01,998 WARN L202 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 41 [2021-02-19 20:33:02,394 WARN L202 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 47 [2021-02-19 20:33:03,005 WARN L202 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-02-19 20:33:04,051 WARN L202 SmtUtils]: Spent 655.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 70 [2021-02-19 20:33:05,008 WARN L202 SmtUtils]: Spent 841.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 85 [2021-02-19 20:33:05,277 WARN L202 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-02-19 20:33:05,613 WARN L202 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-02-19 20:33:05,831 WARN L202 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 27 [2021-02-19 20:33:06,280 WARN L202 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 28 [2021-02-19 20:33:06,575 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2021-02-19 20:33:07,190 WARN L202 SmtUtils]: Spent 466.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2021-02-19 20:33:07,968 WARN L202 SmtUtils]: Spent 609.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 78 [2021-02-19 20:33:08,676 WARN L202 SmtUtils]: Spent 623.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 70 [2021-02-19 20:33:09,604 WARN L202 SmtUtils]: Spent 811.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 91 [2021-02-19 20:33:10,544 WARN L202 SmtUtils]: Spent 841.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 85 [2021-02-19 20:33:10,803 WARN L202 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 24 [2021-02-19 20:33:11,147 WARN L202 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-02-19 20:33:11,466 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 23 [2021-02-19 20:33:11,633 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 22 [2021-02-19 20:33:12,181 WARN L202 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2021-02-19 20:33:13,058 WARN L202 SmtUtils]: Spent 630.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 71 [2021-02-19 20:33:13,363 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 29 [2021-02-19 20:33:13,568 WARN L202 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 27 [2021-02-19 20:33:13,753 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 22 [2021-02-19 20:33:13,982 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-02-19 20:33:15,151 WARN L202 SmtUtils]: Spent 859.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 83 [2021-02-19 20:33:16,119 WARN L202 SmtUtils]: Spent 851.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 91 [2021-02-19 20:33:17,094 WARN L202 SmtUtils]: Spent 845.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 83 [2021-02-19 20:33:17,881 WARN L202 SmtUtils]: Spent 610.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 71 [2021-02-19 20:33:18,781 WARN L202 SmtUtils]: Spent 776.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 87 [2021-02-19 20:33:20,004 WARN L202 SmtUtils]: Spent 756.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 86 [2021-02-19 20:33:20,307 WARN L202 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 26 [2021-02-19 20:33:20,888 WARN L202 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 31 [2021-02-19 20:33:21,091 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 24 [2021-02-19 20:33:21,374 WARN L202 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 27 [2021-02-19 20:33:21,698 WARN L202 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 25 [2021-02-19 20:33:21,919 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 24 [2021-02-19 20:33:22,255 WARN L202 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 23 [2021-02-19 20:33:22,474 WARN L202 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 26 [2021-02-19 20:33:22,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:33:22,697 INFO L93 Difference]: Finished difference Result 12276 states and 39235 transitions. [2021-02-19 20:33:22,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-02-19 20:33:22,699 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-02-19 20:33:22,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:33:22,722 INFO L225 Difference]: With dead ends: 12276 [2021-02-19 20:33:22,722 INFO L226 Difference]: Without dead ends: 11872 [2021-02-19 20:33:22,723 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3711 ImplicationChecksByTransitivity, 30.1s TimeCoverageRelationStatistics Valid=2270, Invalid=9072, Unknown=0, NotChecked=0, Total=11342 [2021-02-19 20:33:22,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11872 states. [2021-02-19 20:33:22,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11872 to 7516. [2021-02-19 20:33:22,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7516 states, 7515 states have (on average 3.3532934131736525) internal successors, (25200), 7515 states have internal predecessors, (25200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:33:22,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7516 states to 7516 states and 25200 transitions. [2021-02-19 20:33:22,862 INFO L78 Accepts]: Start accepts. Automaton has 7516 states and 25200 transitions. Word has length 36 [2021-02-19 20:33:22,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:33:22,862 INFO L480 AbstractCegarLoop]: Abstraction has 7516 states and 25200 transitions. [2021-02-19 20:33:22,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:33:22,862 INFO L276 IsEmpty]: Start isEmpty. Operand 7516 states and 25200 transitions. [2021-02-19 20:33:22,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-02-19 20:33:22,872 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:33:22,873 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:33:23,073 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable854,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:33:23,073 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:33:23,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:33:23,073 INFO L82 PathProgramCache]: Analyzing trace with hash -836466659, now seen corresponding path program 57 times [2021-02-19 20:33:23,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:33:23,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153758788] [2021-02-19 20:33:23,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:33:23,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:33:23,555 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2021-02-19 20:33:23,737 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2021-02-19 20:33:24,530 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:33:24,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153758788] [2021-02-19 20:33:24,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480951720] [2021-02-19 20:33:24,530 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:33:24,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 20:33:24,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:33:24,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 20:33:24,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:33:25,317 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2021-02-19 20:33:26,121 WARN L202 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2021-02-19 20:33:26,686 WARN L202 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2021-02-19 20:33:27,585 WARN L202 SmtUtils]: Spent 603.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 70 [2021-02-19 20:33:28,605 WARN L202 SmtUtils]: Spent 741.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 83 [2021-02-19 20:33:28,823 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:33:28,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:33:28,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-02-19 20:33:28,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900577525] [2021-02-19 20:33:28,823 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 20:33:28,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:33:28,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 20:33:28,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=951, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 20:33:28,824 INFO L87 Difference]: Start difference. First operand 7516 states and 25200 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:33:29,261 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-02-19 20:33:29,556 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2021-02-19 20:33:30,352 WARN L202 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2021-02-19 20:33:30,651 WARN L202 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 30 [2021-02-19 20:33:31,066 WARN L202 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-02-19 20:33:31,382 WARN L202 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 34 [2021-02-19 20:33:32,369 WARN L202 SmtUtils]: Spent 743.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 79 [2021-02-19 20:33:32,776 WARN L202 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2021-02-19 20:33:32,992 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-02-19 20:33:33,614 WARN L202 SmtUtils]: Spent 493.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2021-02-19 20:33:33,831 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 28 [2021-02-19 20:33:34,107 WARN L202 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2021-02-19 20:33:34,359 WARN L202 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-02-19 20:33:34,804 WARN L202 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 31 [2021-02-19 20:33:35,026 WARN L202 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 34 [2021-02-19 20:33:35,217 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 20 [2021-02-19 20:33:35,413 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2021-02-19 20:33:35,729 WARN L202 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 27 [2021-02-19 20:33:35,913 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2021-02-19 20:33:36,785 WARN L202 SmtUtils]: Spent 692.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 79 [2021-02-19 20:33:37,115 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 28 [2021-02-19 20:33:37,681 WARN L202 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2021-02-19 20:33:37,961 WARN L202 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 28 [2021-02-19 20:33:38,128 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 20 [2021-02-19 20:33:38,326 WARN L202 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-02-19 20:33:39,395 WARN L202 SmtUtils]: Spent 892.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 91 [2021-02-19 20:33:40,418 WARN L202 SmtUtils]: Spent 904.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 91 [2021-02-19 20:33:41,029 WARN L202 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 54 [2021-02-19 20:33:41,385 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 23 [2021-02-19 20:33:42,359 WARN L202 SmtUtils]: Spent 805.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 85 [2021-02-19 20:33:42,629 WARN L202 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 26 [2021-02-19 20:33:43,179 WARN L202 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 30 [2021-02-19 20:33:43,466 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 22 [2021-02-19 20:33:43,787 WARN L202 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 23 [2021-02-19 20:33:44,137 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 24 [2021-02-19 20:33:44,553 WARN L202 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 24 [2021-02-19 20:33:44,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:33:44,599 INFO L93 Difference]: Finished difference Result 10518 states and 34017 transitions. [2021-02-19 20:33:44,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-02-19 20:33:44,602 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-02-19 20:33:44,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:33:44,621 INFO L225 Difference]: With dead ends: 10518 [2021-02-19 20:33:44,621 INFO L226 Difference]: Without dead ends: 10177 [2021-02-19 20:33:44,622 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1586 ImplicationChecksByTransitivity, 17.6s TimeCoverageRelationStatistics Valid=1077, Invalid=4473, Unknown=0, NotChecked=0, Total=5550 [2021-02-19 20:33:44,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10177 states. [2021-02-19 20:33:44,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10177 to 8040. [2021-02-19 20:33:44,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8040 states, 8039 states have (on average 3.358004726956089) internal successors, (26995), 8039 states have internal predecessors, (26995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:33:44,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8040 states to 8040 states and 26995 transitions. [2021-02-19 20:33:44,746 INFO L78 Accepts]: Start accepts. Automaton has 8040 states and 26995 transitions. Word has length 36 [2021-02-19 20:33:44,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:33:44,746 INFO L480 AbstractCegarLoop]: Abstraction has 8040 states and 26995 transitions. [2021-02-19 20:33:44,746 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:33:44,746 INFO L276 IsEmpty]: Start isEmpty. Operand 8040 states and 26995 transitions. [2021-02-19 20:33:44,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-02-19 20:33:44,757 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:33:44,757 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:33:44,957 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable880,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:33:44,957 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:33:44,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:33:44,957 INFO L82 PathProgramCache]: Analyzing trace with hash -520939627, now seen corresponding path program 58 times [2021-02-19 20:33:44,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:33:44,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090431895] [2021-02-19 20:33:44,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:33:44,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:33:45,445 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-02-19 20:33:45,635 WARN L202 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2021-02-19 20:33:45,987 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2021-02-19 20:33:46,576 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:33:46,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090431895] [2021-02-19 20:33:46,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736391086] [2021-02-19 20:33:46,576 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:33:46,597 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:33:46,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:33:46,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 20:33:46,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:33:47,313 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2021-02-19 20:33:48,157 WARN L202 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-02-19 20:33:48,792 WARN L202 SmtUtils]: Spent 514.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2021-02-19 20:33:50,011 WARN L202 SmtUtils]: Spent 933.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 74 [2021-02-19 20:33:50,694 WARN L202 SmtUtils]: Spent 572.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 52 [2021-02-19 20:33:51,287 WARN L202 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2021-02-19 20:33:52,030 WARN L202 SmtUtils]: Spent 612.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2021-02-19 20:33:52,183 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:33:52,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:33:52,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-02-19 20:33:52,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579452658] [2021-02-19 20:33:52,183 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-02-19 20:33:52,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:33:52,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-02-19 20:33:52,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=1131, Unknown=0, NotChecked=0, Total=1406 [2021-02-19 20:33:52,184 INFO L87 Difference]: Start difference. First operand 8040 states and 26995 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:33:53,504 WARN L202 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2021-02-19 20:33:53,767 WARN L202 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 24 [2021-02-19 20:33:54,174 WARN L202 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-02-19 20:33:54,388 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2021-02-19 20:33:55,246 WARN L202 SmtUtils]: Spent 653.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2021-02-19 20:33:56,359 WARN L202 SmtUtils]: Spent 919.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 78 [2021-02-19 20:33:56,802 WARN L202 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 34 [2021-02-19 20:33:57,028 WARN L202 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2021-02-19 20:33:57,401 WARN L202 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 30 [2021-02-19 20:33:57,945 WARN L202 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 45 [2021-02-19 20:33:58,216 WARN L202 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 Received shutdown request... [2021-02-19 20:33:58,853 WARN L219 SmtUtils]: Removed 9 from assertion stack [2021-02-19 20:33:58,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-02-19 20:33:59,054 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable906,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:33:59,054 WARN L545 AbstractCegarLoop]: Verification canceled [2021-02-19 20:33:59,057 WARN L224 ceAbstractionStarter]: Timeout [2021-02-19 20:33:59,057 INFO L202 PluginConnector]: Adding new model threaded-sum-3-vel.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.02 08:33:59 BasicIcfg [2021-02-19 20:33:59,057 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-19 20:33:59,057 INFO L168 Benchmark]: Toolchain (without parser) took 535968.26 ms. Allocated memory was 255.9 MB in the beginning and 1.3 GB in the end (delta: 1.0 GB). Free memory was 236.9 MB in the beginning and 967.9 MB in the end (delta: -730.9 MB). Peak memory consumption was 314.5 MB. Max. memory is 16.0 GB. [2021-02-19 20:33:59,058 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 255.9 MB. Free memory is still 238.2 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-02-19 20:33:59,058 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.56 ms. Allocated memory is still 255.9 MB. Free memory was 236.4 MB in the beginning and 235.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-02-19 20:33:59,058 INFO L168 Benchmark]: Boogie Preprocessor took 10.04 ms. Allocated memory is still 255.9 MB. Free memory was 235.0 MB in the beginning and 234.0 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-02-19 20:33:59,058 INFO L168 Benchmark]: RCFGBuilder took 312.29 ms. Allocated memory is still 255.9 MB. Free memory was 234.0 MB in the beginning and 235.2 MB in the end (delta: -1.3 MB). Peak memory consumption was 18.6 MB. Max. memory is 16.0 GB. [2021-02-19 20:33:59,058 INFO L168 Benchmark]: TraceAbstraction took 535620.54 ms. Allocated memory was 255.9 MB in the beginning and 1.3 GB in the end (delta: 1.0 GB). Free memory was 234.5 MB in the beginning and 967.9 MB in the end (delta: -733.4 MB). Peak memory consumption was 310.6 MB. Max. memory is 16.0 GB. [2021-02-19 20:33:59,058 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 255.9 MB. Free memory is still 238.2 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 18.56 ms. Allocated memory is still 255.9 MB. Free memory was 236.4 MB in the beginning and 235.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 10.04 ms. Allocated memory is still 255.9 MB. Free memory was 235.0 MB in the beginning and 234.0 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 312.29 ms. Allocated memory is still 255.9 MB. Free memory was 234.0 MB in the beginning and 235.2 MB in the end (delta: -1.3 MB). Peak memory consumption was 18.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 535620.54 ms. Allocated memory was 255.9 MB in the beginning and 1.3 GB in the end (delta: 1.0 GB). Free memory was 234.5 MB in the beginning and 967.9 MB in the end (delta: -733.4 MB). Peak memory consumption was 310.6 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 77]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 77). Cancelled while BasicCegarLoop was constructing difference of abstraction (8040states) and FLOYD_HOARE automaton (currently 34 states, 38 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 84 for 402ms.. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 535.4s, OverallIterations: 61, TraceHistogramMax: 3, AutomataDifference: 393.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1961 SDtfs, 30590 SDslu, 26167 SDs, 0 SdLazy, 51587 SolverSat, 14312 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 39.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5213 GetRequests, 1039 SyntacticMatches, 137 SemanticMatches, 4036 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97220 ImplicationChecksByTransitivity, 427.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=11571occurred in iteration=38, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 6.1s AutomataMinimizationTime, 60 MinimizatonAttempts, 213296 StatesRemovedByMinimization, 58 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 121.4s InterpolantComputationTime, 3967 NumberOfCodeBlocks, 3967 NumberOfCodeBlocksAsserted, 230 NumberOfCheckSat, 3849 ConstructedInterpolants, 0 QuantifiedInterpolants, 4489235 SizeOfPredicates, 377 NumberOfNonLiveVariables, 3587 ConjunctsInSsa, 1150 ConjunctsInUnsatCore, 118 InterpolantComputations, 4 PerfectInterpolantSequences, 29/1590 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown