/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-more/parray-copy.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-11 00:14:04,884 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-11 00:14:04,886 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-11 00:14:04,913 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-11 00:14:05,088 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 [2021-03-11 00:14:05,132 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-11 00:14:05,132 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-11 00:14:05,132 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-03-11 00:14:05,133 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-03-11 00:14:05,134 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-11 00:14:05,134 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-11 00:14:05,134 INFO L138 SettingsManager]: * Use SBE=true [2021-03-11 00:14:05,134 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-11 00:14:05,135 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-11 00:14:05,138 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-11 00:14:05,139 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-11 00:14:05,139 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-11 00:14:05,139 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-11 00:14:05,139 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-11 00:14:05,139 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-11 00:14:05,139 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-11 00:14:05,139 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-11 00:14:05,140 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-11 00:14:05,140 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-11 00:14:05,140 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-11 00:14:05,140 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-11 00:14:05,140 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-11 00:14:05,140 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-11 00:14:05,141 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-11 00:14:05,141 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-11 00:14:05,141 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-11 00:14:05,141 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-11 00:14:05,142 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-11 00:14:05,142 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-11 00:14:05,142 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-11 00:14:05,142 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-11 00:14:05,142 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-11 00:14:05,514 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-11 00:14:05,548 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-11 00:14:05,551 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-11 00:14:05,553 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-11 00:14:05,554 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-11 00:14:05,555 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/parray-copy.wvr.bpl [2021-03-11 00:14:05,556 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/parray-copy.wvr.bpl' [2021-03-11 00:14:05,592 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-11 00:14:05,597 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-11 00:14:05,599 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-11 00:14:05,599 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-11 00:14:05,599 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-11 00:14:05,610 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:14:05" (1/1) ... [2021-03-11 00:14:05,618 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:14:05" (1/1) ... [2021-03-11 00:14:05,625 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-11 00:14:05,627 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-11 00:14:05,627 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-11 00:14:05,627 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-11 00:14:05,635 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:14:05" (1/1) ... [2021-03-11 00:14:05,635 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:14:05" (1/1) ... [2021-03-11 00:14:05,636 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:14:05" (1/1) ... [2021-03-11 00:14:05,636 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:14:05" (1/1) ... [2021-03-11 00:14:05,639 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:14:05" (1/1) ... [2021-03-11 00:14:05,642 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:14:05" (1/1) ... [2021-03-11 00:14:05,643 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:14:05" (1/1) ... [2021-03-11 00:14:05,644 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-11 00:14:05,645 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-11 00:14:05,645 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-11 00:14:05,645 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-11 00:14:05,648 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:14:05" (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 [2021-03-11 00:14:05,725 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-11 00:14:05,727 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-11 00:14:05,727 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-11 00:14:05,727 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-11 00:14:05,727 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-11 00:14:05,727 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-11 00:14:05,728 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-11 00:14:05,728 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-11 00:14:05,728 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-11 00:14:05,728 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-03-11 00:14:05,728 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-03-11 00:14:05,728 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-03-11 00:14:05,729 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-11 00:14:05,951 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-11 00:14:05,952 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-11 00:14:05,953 INFO L202 PluginConnector]: Adding new model parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 12:14:05 BoogieIcfgContainer [2021-03-11 00:14:05,953 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-11 00:14:05,955 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-11 00:14:05,955 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-11 00:14:05,957 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-11 00:14:05,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:14:05" (1/2) ... [2021-03-11 00:14:05,959 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54cfae49 and model type parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.03 12:14:05, skipping insertion in model container [2021-03-11 00:14:05,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 12:14:05" (2/2) ... [2021-03-11 00:14:05,960 INFO L111 eAbstractionObserver]: Analyzing ICFG parray-copy.wvr.bpl [2021-03-11 00:14:05,982 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-11 00:14:05,982 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-11 00:14:05,986 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-11 00:14:05,987 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-11 00:14:06,072 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-03-11 00:14:06,104 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-03-11 00:14:06,122 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-11 00:14:06,122 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-11 00:14:06,122 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-11 00:14:06,123 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-11 00:14:06,139 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-11 00:14:06,139 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-11 00:14:06,139 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-11 00:14:06,139 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-11 00:14:06,149 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 38 places, 31 transitions, 86 flow [2021-03-11 00:14:06,203 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 116 states, 114 states have (on average 2.7719298245614037) internal successors, (316), 115 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:06,206 INFO L276 IsEmpty]: Start isEmpty. Operand has 116 states, 114 states have (on average 2.7719298245614037) internal successors, (316), 115 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:06,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-11 00:14:06,220 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:14:06,220 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:14:06,221 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:14:06,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:14:06,226 INFO L82 PathProgramCache]: Analyzing trace with hash -245139670, now seen corresponding path program 1 times [2021-03-11 00:14:06,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:14:06,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872274348] [2021-03-11 00:14:06,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:14:06,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:06,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:06,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872274348] [2021-03-11 00:14:06,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 00:14:06,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-11 00:14:06,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745276130] [2021-03-11 00:14:06,463 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 00:14:06,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:14:06,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 00:14:06,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-11 00:14:06,479 INFO L87 Difference]: Start difference. First operand has 116 states, 114 states have (on average 2.7719298245614037) internal successors, (316), 115 states have internal predecessors, (316), 0 states have call successors, (0), 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 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:06,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:14:06,547 INFO L93 Difference]: Finished difference Result 156 states and 438 transitions. [2021-03-11 00:14:06,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 00:14:06,548 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-11 00:14:06,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:14:06,560 INFO L225 Difference]: With dead ends: 156 [2021-03-11 00:14:06,560 INFO L226 Difference]: Without dead ends: 156 [2021-03-11 00:14:06,562 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 47.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-03-11 00:14:06,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-03-11 00:14:06,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 135. [2021-03-11 00:14:06,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.8059701492537314) internal successors, (376), 134 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:06,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 376 transitions. [2021-03-11 00:14:06,615 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 376 transitions. Word has length 20 [2021-03-11 00:14:06,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:14:06,617 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 376 transitions. [2021-03-11 00:14:06,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:06,617 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 376 transitions. [2021-03-11 00:14:06,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-11 00:14:06,619 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:14:06,619 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:14:06,620 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-11 00:14:06,620 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:14:06,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:14:06,621 INFO L82 PathProgramCache]: Analyzing trace with hash -716869078, now seen corresponding path program 1 times [2021-03-11 00:14:06,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:14:06,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236657757] [2021-03-11 00:14:06,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:14:06,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:06,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:06,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236657757] [2021-03-11 00:14:06,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 00:14:06,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-11 00:14:06,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164275721] [2021-03-11 00:14:06,661 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 00:14:06,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:14:06,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 00:14:06,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-11 00:14:06,662 INFO L87 Difference]: Start difference. First operand 135 states and 376 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:06,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:14:06,700 INFO L93 Difference]: Finished difference Result 160 states and 450 transitions. [2021-03-11 00:14:06,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-11 00:14:06,701 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-11 00:14:06,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:14:06,703 INFO L225 Difference]: With dead ends: 160 [2021-03-11 00:14:06,703 INFO L226 Difference]: Without dead ends: 160 [2021-03-11 00:14:06,704 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-11 00:14:06,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-03-11 00:14:06,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2021-03-11 00:14:06,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.830188679245283) internal successors, (450), 159 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:06,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 450 transitions. [2021-03-11 00:14:06,721 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 450 transitions. Word has length 22 [2021-03-11 00:14:06,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:14:06,721 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 450 transitions. [2021-03-11 00:14:06,721 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:06,722 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 450 transitions. [2021-03-11 00:14:06,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:14:06,723 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:14:06,723 INFO L519 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] [2021-03-11 00:14:06,724 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-11 00:14:06,724 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:14:06,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:14:06,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1666279556, now seen corresponding path program 1 times [2021-03-11 00:14:06,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:14:06,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79667774] [2021-03-11 00:14:06,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:14:06,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:07,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:07,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79667774] [2021-03-11 00:14:07,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153234583] [2021-03-11 00:14:07,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:07,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:07,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-11 00:14:07,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:14:07,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-11 00:14:07,560 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:07,570 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:14:07,578 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-11 00:14:07,579 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:20 [2021-03-11 00:14:07,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:07,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:14:07,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-03-11 00:14:07,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060918712] [2021-03-11 00:14:07,634 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:14:07,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:14:07,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:14:07,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:14:07,641 INFO L87 Difference]: Start difference. First operand 160 states and 450 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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) [2021-03-11 00:14:08,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:14:08,216 INFO L93 Difference]: Finished difference Result 395 states and 1116 transitions. [2021-03-11 00:14:08,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-11 00:14:08,218 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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 24 [2021-03-11 00:14:08,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:14:08,228 INFO L225 Difference]: With dead ends: 395 [2021-03-11 00:14:08,228 INFO L226 Difference]: Without dead ends: 280 [2021-03-11 00:14:08,229 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 688.8ms TimeCoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2021-03-11 00:14:08,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-03-11 00:14:08,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 194. [2021-03-11 00:14:08,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.8911917098445596) internal successors, (558), 193 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:08,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 558 transitions. [2021-03-11 00:14:08,260 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 558 transitions. Word has length 24 [2021-03-11 00:14:08,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:14:08,260 INFO L480 AbstractCegarLoop]: Abstraction has 194 states and 558 transitions. [2021-03-11 00:14:08,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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) [2021-03-11 00:14:08,261 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 558 transitions. [2021-03-11 00:14:08,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:14:08,266 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:14:08,266 INFO L519 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] [2021-03-11 00:14:08,476 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-03-11 00:14:08,477 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:14:08,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:14:08,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1670859648, now seen corresponding path program 2 times [2021-03-11 00:14:08,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:14:08,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757243772] [2021-03-11 00:14:08,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:14:08,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:08,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:08,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757243772] [2021-03-11 00:14:08,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618672377] [2021-03-11 00:14:08,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:08,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:14:08,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:14:08,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-11 00:14:08,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:14:08,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-11 00:14:08,989 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:08,998 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:14:09,003 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-11 00:14:09,003 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:23 [2021-03-11 00:14:09,140 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:09,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:14:09,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-03-11 00:14:09,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924020400] [2021-03-11 00:14:09,142 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:14:09,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:14:09,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:14:09,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:14:09,149 INFO L87 Difference]: Start difference. First operand 194 states and 558 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:10,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:14:10,397 INFO L93 Difference]: Finished difference Result 639 states and 1800 transitions. [2021-03-11 00:14:10,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-11 00:14:10,398 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:14:10,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:14:10,401 INFO L225 Difference]: With dead ends: 639 [2021-03-11 00:14:10,401 INFO L226 Difference]: Without dead ends: 546 [2021-03-11 00:14:10,402 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 1144.6ms TimeCoverageRelationStatistics Valid=307, Invalid=1253, Unknown=0, NotChecked=0, Total=1560 [2021-03-11 00:14:10,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-03-11 00:14:10,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 281. [2021-03-11 00:14:10,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 2.8892857142857142) internal successors, (809), 280 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:10,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 809 transitions. [2021-03-11 00:14:10,423 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 809 transitions. Word has length 24 [2021-03-11 00:14:10,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:14:10,424 INFO L480 AbstractCegarLoop]: Abstraction has 281 states and 809 transitions. [2021-03-11 00:14:10,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:10,424 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 809 transitions. [2021-03-11 00:14:10,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:14:10,425 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:14:10,425 INFO L519 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] [2021-03-11 00:14:10,657 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:10,657 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:14:10,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:14:10,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1190941142, now seen corresponding path program 3 times [2021-03-11 00:14:10,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:14:10,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265517354] [2021-03-11 00:14:10,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:14:10,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:10,733 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:10,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265517354] [2021-03-11 00:14:10,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409122249] [2021-03-11 00:14:10,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:10,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-11 00:14:10,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:14:10,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-11 00:14:10,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:14:10,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-11 00:14:10,879 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:10,889 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:14:10,895 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-11 00:14:10,896 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:25 [2021-03-11 00:14:11,084 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-11 00:14:11,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:14:11,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-03-11 00:14:11,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900500928] [2021-03-11 00:14:11,085 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-11 00:14:11,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:14:11,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-11 00:14:11,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-03-11 00:14:11,087 INFO L87 Difference]: Start difference. First operand 281 states and 809 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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) [2021-03-11 00:14:12,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:14:12,611 INFO L93 Difference]: Finished difference Result 1001 states and 2814 transitions. [2021-03-11 00:14:12,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-03-11 00:14:12,611 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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 26 [2021-03-11 00:14:12,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:14:12,617 INFO L225 Difference]: With dead ends: 1001 [2021-03-11 00:14:12,617 INFO L226 Difference]: Without dead ends: 966 [2021-03-11 00:14:12,618 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 980.5ms TimeCoverageRelationStatistics Valid=549, Invalid=2757, Unknown=0, NotChecked=0, Total=3306 [2021-03-11 00:14:12,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 966 states. [2021-03-11 00:14:12,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 966 to 305. [2021-03-11 00:14:12,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.924342105263158) internal successors, (889), 304 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:12,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 889 transitions. [2021-03-11 00:14:12,634 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 889 transitions. Word has length 26 [2021-03-11 00:14:12,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:14:12,635 INFO L480 AbstractCegarLoop]: Abstraction has 305 states and 889 transitions. [2021-03-11 00:14:12,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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) [2021-03-11 00:14:12,635 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 889 transitions. [2021-03-11 00:14:12,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:14:12,636 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:14:12,637 INFO L519 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] [2021-03-11 00:14:12,851 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:12,851 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:14:12,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:14:12,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1175480346, now seen corresponding path program 4 times [2021-03-11 00:14:12,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:14:12,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235404724] [2021-03-11 00:14:12,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:14:12,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:12,916 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:12,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235404724] [2021-03-11 00:14:12,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267358433] [2021-03-11 00:14:12,916 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:12,938 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:14:12,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:14:12,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:14:12,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:14:13,057 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:13,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:14:13,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:14:13,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54639470] [2021-03-11 00:14:13,061 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:14:13,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:14:13,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:14:13,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:14:13,063 INFO L87 Difference]: Start difference. First operand 305 states and 889 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:13,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:14:13,935 INFO L93 Difference]: Finished difference Result 1201 states and 3376 transitions. [2021-03-11 00:14:13,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-03-11 00:14:13,936 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:14:13,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:14:13,946 INFO L225 Difference]: With dead ends: 1201 [2021-03-11 00:14:13,946 INFO L226 Difference]: Without dead ends: 1201 [2021-03-11 00:14:13,947 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 532.8ms TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-03-11 00:14:13,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2021-03-11 00:14:13,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 365. [2021-03-11 00:14:13,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 3.0961538461538463) internal successors, (1127), 364 states have internal predecessors, (1127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:13,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 1127 transitions. [2021-03-11 00:14:13,968 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 1127 transitions. Word has length 26 [2021-03-11 00:14:13,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:14:13,968 INFO L480 AbstractCegarLoop]: Abstraction has 365 states and 1127 transitions. [2021-03-11 00:14:13,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:13,968 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 1127 transitions. [2021-03-11 00:14:13,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:14:13,971 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:14:13,971 INFO L519 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] [2021-03-11 00:14:14,187 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:14,187 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:14:14,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:14:14,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1693913438, now seen corresponding path program 5 times [2021-03-11 00:14:14,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:14:14,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540318451] [2021-03-11 00:14:14,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:14:14,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:14,263 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:14,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540318451] [2021-03-11 00:14:14,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344651122] [2021-03-11 00:14:14,263 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:14,285 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:14:14,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:14:14,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:14:14,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:14:14,424 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:14,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:14:14,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:14:14,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018192458] [2021-03-11 00:14:14,426 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:14:14,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:14:14,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:14:14,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:14:14,429 INFO L87 Difference]: Start difference. First operand 365 states and 1127 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:15,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:14:15,284 INFO L93 Difference]: Finished difference Result 1858 states and 5235 transitions. [2021-03-11 00:14:15,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-03-11 00:14:15,285 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:14:15,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:14:15,298 INFO L225 Difference]: With dead ends: 1858 [2021-03-11 00:14:15,298 INFO L226 Difference]: Without dead ends: 1858 [2021-03-11 00:14:15,301 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 516.2ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-03-11 00:14:15,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1858 states. [2021-03-11 00:14:15,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1858 to 388. [2021-03-11 00:14:15,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 3.1834625322997416) internal successors, (1232), 387 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:15,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 1232 transitions. [2021-03-11 00:14:15,331 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 1232 transitions. Word has length 26 [2021-03-11 00:14:15,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:14:15,332 INFO L480 AbstractCegarLoop]: Abstraction has 388 states and 1232 transitions. [2021-03-11 00:14:15,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:15,332 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 1232 transitions. [2021-03-11 00:14:15,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:14:15,334 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:14:15,334 INFO L519 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] [2021-03-11 00:14:15,555 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-03-11 00:14:15,555 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:14:15,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:14:15,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1481056820, now seen corresponding path program 6 times [2021-03-11 00:14:15,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:14:15,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140964384] [2021-03-11 00:14:15,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:14:15,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:15,644 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:15,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140964384] [2021-03-11 00:14:15,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999254899] [2021-03-11 00:14:15,645 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:15,670 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-11 00:14:15,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:14:15,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:14:15,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:14:15,775 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:15,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:14:15,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-11 00:14:15,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888057923] [2021-03-11 00:14:15,776 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:14:15,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:14:15,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:14:15,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:14:15,776 INFO L87 Difference]: Start difference. First operand 388 states and 1232 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:16,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:14:16,429 INFO L93 Difference]: Finished difference Result 1674 states and 4689 transitions. [2021-03-11 00:14:16,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-11 00:14:16,430 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:14:16,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:14:16,438 INFO L225 Difference]: With dead ends: 1674 [2021-03-11 00:14:16,439 INFO L226 Difference]: Without dead ends: 1670 [2021-03-11 00:14:16,439 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 358.6ms TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-03-11 00:14:16,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1670 states. [2021-03-11 00:14:16,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1670 to 402. [2021-03-11 00:14:16,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 3.1645885286783044) internal successors, (1269), 401 states have internal predecessors, (1269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:16,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1269 transitions. [2021-03-11 00:14:16,469 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1269 transitions. Word has length 26 [2021-03-11 00:14:16,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:14:16,469 INFO L480 AbstractCegarLoop]: Abstraction has 402 states and 1269 transitions. [2021-03-11 00:14:16,470 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:16,470 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1269 transitions. [2021-03-11 00:14:16,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:14:16,471 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:14:16,471 INFO L519 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] [2021-03-11 00:14:16,695 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:16,695 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:14:16,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:14:16,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1751566512, now seen corresponding path program 7 times [2021-03-11 00:14:16,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:14:16,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005522717] [2021-03-11 00:14:16,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:14:16,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:16,741 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:16,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005522717] [2021-03-11 00:14:16,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742435650] [2021-03-11 00:14:16,741 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:16,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:16,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:14:16,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:14:16,866 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:16,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:14:16,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-11 00:14:16,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954146425] [2021-03-11 00:14:16,870 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:14:16,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:14:16,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:14:16,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:14:16,871 INFO L87 Difference]: Start difference. First operand 402 states and 1269 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:17,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:14:17,599 INFO L93 Difference]: Finished difference Result 1844 states and 5052 transitions. [2021-03-11 00:14:17,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-03-11 00:14:17,599 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:14:17,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:14:17,608 INFO L225 Difference]: With dead ends: 1844 [2021-03-11 00:14:17,608 INFO L226 Difference]: Without dead ends: 1844 [2021-03-11 00:14:17,609 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 399.7ms TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2021-03-11 00:14:17,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2021-03-11 00:14:17,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 400. [2021-03-11 00:14:17,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 3.1679197994987467) internal successors, (1264), 399 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:17,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 1264 transitions. [2021-03-11 00:14:17,634 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 1264 transitions. Word has length 26 [2021-03-11 00:14:17,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:14:17,635 INFO L480 AbstractCegarLoop]: Abstraction has 400 states and 1264 transitions. [2021-03-11 00:14:17,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:17,635 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 1264 transitions. [2021-03-11 00:14:17,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:14:17,636 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:14:17,636 INFO L519 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] [2021-03-11 00:14:17,860 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:17,860 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:14:17,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:14:17,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1992513178, now seen corresponding path program 8 times [2021-03-11 00:14:17,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:14:17,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730184930] [2021-03-11 00:14:17,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:14:17,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:17,909 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:17,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730184930] [2021-03-11 00:14:17,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474020749] [2021-03-11 00:14:17,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:17,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:14:17,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:14:17,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:14:17,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:14:18,060 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:18,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:14:18,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:14:18,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734243569] [2021-03-11 00:14:18,061 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:14:18,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:14:18,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:14:18,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:14:18,062 INFO L87 Difference]: Start difference. First operand 400 states and 1264 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:18,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:14:18,596 INFO L93 Difference]: Finished difference Result 1308 states and 3890 transitions. [2021-03-11 00:14:18,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-11 00:14:18,596 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:14:18,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:14:18,602 INFO L225 Difference]: With dead ends: 1308 [2021-03-11 00:14:18,603 INFO L226 Difference]: Without dead ends: 1308 [2021-03-11 00:14:18,603 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 343.1ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-03-11 00:14:18,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2021-03-11 00:14:18,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 415. [2021-03-11 00:14:18,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 3.2294685990338166) internal successors, (1337), 414 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:18,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1337 transitions. [2021-03-11 00:14:18,622 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1337 transitions. Word has length 26 [2021-03-11 00:14:18,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:14:18,622 INFO L480 AbstractCegarLoop]: Abstraction has 415 states and 1337 transitions. [2021-03-11 00:14:18,622 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:18,622 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1337 transitions. [2021-03-11 00:14:18,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:14:18,623 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:14:18,624 INFO L519 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] [2021-03-11 00:14:18,839 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-03-11 00:14:18,839 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:14:18,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:14:18,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1182457080, now seen corresponding path program 9 times [2021-03-11 00:14:18,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:14:18,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141880435] [2021-03-11 00:14:18,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:14:18,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:18,910 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:18,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141880435] [2021-03-11 00:14:18,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070557591] [2021-03-11 00:14:18,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:18,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:14:18,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:14:18,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:14:18,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:14:19,014 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:19,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:14:19,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-11 00:14:19,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425175636] [2021-03-11 00:14:19,015 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:14:19,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:14:19,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:14:19,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:14:19,016 INFO L87 Difference]: Start difference. First operand 415 states and 1337 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:19,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:14:19,441 INFO L93 Difference]: Finished difference Result 1124 states and 3354 transitions. [2021-03-11 00:14:19,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-11 00:14:19,441 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:14:19,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:14:19,445 INFO L225 Difference]: With dead ends: 1124 [2021-03-11 00:14:19,446 INFO L226 Difference]: Without dead ends: 1120 [2021-03-11 00:14:19,446 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 248.4ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-03-11 00:14:19,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2021-03-11 00:14:19,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 421. [2021-03-11 00:14:19,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 3.2333333333333334) internal successors, (1358), 420 states have internal predecessors, (1358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:19,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 1358 transitions. [2021-03-11 00:14:19,464 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 1358 transitions. Word has length 26 [2021-03-11 00:14:19,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:14:19,464 INFO L480 AbstractCegarLoop]: Abstraction has 421 states and 1358 transitions. [2021-03-11 00:14:19,464 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:19,464 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 1358 transitions. [2021-03-11 00:14:19,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:14:19,466 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:14:19,466 INFO L519 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] [2021-03-11 00:14:19,689 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:19,690 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:14:19,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:14:19,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1452966772, now seen corresponding path program 10 times [2021-03-11 00:14:19,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:14:19,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452228525] [2021-03-11 00:14:19,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:14:19,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:19,756 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:19,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452228525] [2021-03-11 00:14:19,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578005193] [2021-03-11 00:14:19,757 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:19,789 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:14:19,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:14:19,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:14:19,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:14:19,893 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:19,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:14:19,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-11 00:14:19,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858522431] [2021-03-11 00:14:19,894 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:14:19,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:14:19,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:14:19,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:14:19,895 INFO L87 Difference]: Start difference. First operand 421 states and 1358 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:20,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:14:20,337 INFO L93 Difference]: Finished difference Result 1207 states and 3549 transitions. [2021-03-11 00:14:20,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-11 00:14:20,337 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:14:20,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:14:20,343 INFO L225 Difference]: With dead ends: 1207 [2021-03-11 00:14:20,343 INFO L226 Difference]: Without dead ends: 1207 [2021-03-11 00:14:20,344 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 282.5ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-03-11 00:14:20,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1207 states. [2021-03-11 00:14:20,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1207 to 415. [2021-03-11 00:14:20,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 3.2294685990338166) internal successors, (1337), 414 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:20,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1337 transitions. [2021-03-11 00:14:20,362 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1337 transitions. Word has length 26 [2021-03-11 00:14:20,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:14:20,362 INFO L480 AbstractCegarLoop]: Abstraction has 415 states and 1337 transitions. [2021-03-11 00:14:20,362 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:20,362 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1337 transitions. [2021-03-11 00:14:20,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:14:20,363 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:14:20,363 INFO L519 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] [2021-03-11 00:14:20,586 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:20,587 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:14:20,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:14:20,587 INFO L82 PathProgramCache]: Analyzing trace with hash 2037994958, now seen corresponding path program 11 times [2021-03-11 00:14:20,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:14:20,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131024748] [2021-03-11 00:14:20,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:14:20,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:20,643 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:20,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131024748] [2021-03-11 00:14:20,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975347266] [2021-03-11 00:14:20,644 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:20,669 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:14:20,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:14:20,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:14:20,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:14:20,753 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:20,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:14:20,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-11 00:14:20,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808585311] [2021-03-11 00:14:20,755 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:14:20,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:14:20,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:14:20,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:14:20,756 INFO L87 Difference]: Start difference. First operand 415 states and 1337 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:20,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:14:20,989 INFO L93 Difference]: Finished difference Result 824 states and 2512 transitions. [2021-03-11 00:14:20,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-11 00:14:20,989 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:14:20,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:14:20,994 INFO L225 Difference]: With dead ends: 824 [2021-03-11 00:14:20,994 INFO L226 Difference]: Without dead ends: 812 [2021-03-11 00:14:20,995 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 143.2ms TimeCoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2021-03-11 00:14:20,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2021-03-11 00:14:21,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 433. [2021-03-11 00:14:21,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 3.2175925925925926) internal successors, (1390), 432 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:21,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 1390 transitions. [2021-03-11 00:14:21,008 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 1390 transitions. Word has length 26 [2021-03-11 00:14:21,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:14:21,008 INFO L480 AbstractCegarLoop]: Abstraction has 433 states and 1390 transitions. [2021-03-11 00:14:21,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:21,009 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 1390 transitions. [2021-03-11 00:14:21,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:14:21,010 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:14:21,010 INFO L519 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] [2021-03-11 00:14:21,226 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-03-11 00:14:21,226 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:14:21,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:14:21,227 INFO L82 PathProgramCache]: Analyzing trace with hash 545990226, now seen corresponding path program 12 times [2021-03-11 00:14:21,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:14:21,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353567381] [2021-03-11 00:14:21,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:14:21,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:21,296 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:21,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353567381] [2021-03-11 00:14:21,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447416151] [2021-03-11 00:14:21,297 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:21,337 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:14:21,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:14:21,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:14:21,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:14:21,407 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:21,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:14:21,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-11 00:14:21,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890549674] [2021-03-11 00:14:21,408 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:14:21,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:14:21,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:14:21,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:14:21,409 INFO L87 Difference]: Start difference. First operand 433 states and 1390 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:21,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:14:21,729 INFO L93 Difference]: Finished difference Result 999 states and 2955 transitions. [2021-03-11 00:14:21,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-11 00:14:21,730 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:14:21,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:14:21,734 INFO L225 Difference]: With dead ends: 999 [2021-03-11 00:14:21,734 INFO L226 Difference]: Without dead ends: 995 [2021-03-11 00:14:21,734 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 177.7ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-03-11 00:14:21,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2021-03-11 00:14:21,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 472. [2021-03-11 00:14:21,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 471 states have (on average 3.2229299363057327) internal successors, (1518), 471 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:21,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 1518 transitions. [2021-03-11 00:14:21,763 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 1518 transitions. Word has length 26 [2021-03-11 00:14:21,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:14:21,763 INFO L480 AbstractCegarLoop]: Abstraction has 472 states and 1518 transitions. [2021-03-11 00:14:21,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:21,763 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 1518 transitions. [2021-03-11 00:14:21,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:14:21,766 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:14:21,766 INFO L519 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] [2021-03-11 00:14:21,979 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-03-11 00:14:21,979 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:14:21,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:14:21,980 INFO L82 PathProgramCache]: Analyzing trace with hash 816499918, now seen corresponding path program 13 times [2021-03-11 00:14:21,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:14:21,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700138622] [2021-03-11 00:14:21,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:14:21,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:22,027 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:22,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700138622] [2021-03-11 00:14:22,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763460040] [2021-03-11 00:14:22,028 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:22,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:22,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:14:22,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:14:22,130 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:22,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:14:22,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-11 00:14:22,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633913948] [2021-03-11 00:14:22,133 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:14:22,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:14:22,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:14:22,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:14:22,134 INFO L87 Difference]: Start difference. First operand 472 states and 1518 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:22,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:14:22,561 INFO L93 Difference]: Finished difference Result 1053 states and 3099 transitions. [2021-03-11 00:14:22,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-11 00:14:22,561 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:14:22,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:14:22,566 INFO L225 Difference]: With dead ends: 1053 [2021-03-11 00:14:22,566 INFO L226 Difference]: Without dead ends: 1053 [2021-03-11 00:14:22,567 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 244.4ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:14:22,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1053 states. [2021-03-11 00:14:22,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1053 to 464. [2021-03-11 00:14:22,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 3.2311015118790496) internal successors, (1496), 463 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:22,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1496 transitions. [2021-03-11 00:14:22,583 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1496 transitions. Word has length 26 [2021-03-11 00:14:22,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:14:22,583 INFO L480 AbstractCegarLoop]: Abstraction has 464 states and 1496 transitions. [2021-03-11 00:14:22,583 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:22,583 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1496 transitions. [2021-03-11 00:14:22,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:14:22,585 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:14:22,585 INFO L519 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] [2021-03-11 00:14:22,799 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-03-11 00:14:22,799 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:14:22,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:14:22,800 INFO L82 PathProgramCache]: Analyzing trace with hash -980752764, now seen corresponding path program 1 times [2021-03-11 00:14:22,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:14:22,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50253303] [2021-03-11 00:14:22,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:14:22,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:23,120 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:23,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50253303] [2021-03-11 00:14:23,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49599184] [2021-03-11 00:14:23,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:23,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:23,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-11 00:14:23,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:14:23,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-11 00:14:23,358 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:23,368 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:14:23,371 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-11 00:14:23,372 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:27 [2021-03-11 00:14:23,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:23,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-03-11 00:14:23,471 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:23,482 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:14:23,492 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-11 00:14:23,492 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:34 [2021-03-11 00:14:23,607 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:23,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:14:23,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-03-11 00:14:23,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786794747] [2021-03-11 00:14:23,608 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-11 00:14:23,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:14:23,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-11 00:14:23,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-03-11 00:14:23,609 INFO L87 Difference]: Start difference. First operand 464 states and 1496 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:24,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:14:24,339 INFO L93 Difference]: Finished difference Result 853 states and 2545 transitions. [2021-03-11 00:14:24,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-11 00:14:24,339 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-03-11 00:14:24,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:14:24,343 INFO L225 Difference]: With dead ends: 853 [2021-03-11 00:14:24,343 INFO L226 Difference]: Without dead ends: 766 [2021-03-11 00:14:24,344 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 843.2ms TimeCoverageRelationStatistics Valid=245, Invalid=1161, Unknown=0, NotChecked=0, Total=1406 [2021-03-11 00:14:24,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2021-03-11 00:14:24,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 490. [2021-03-11 00:14:24,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 3.216768916155419) internal successors, (1573), 489 states have internal predecessors, (1573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:24,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1573 transitions. [2021-03-11 00:14:24,360 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1573 transitions. Word has length 28 [2021-03-11 00:14:24,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:14:24,360 INFO L480 AbstractCegarLoop]: Abstraction has 490 states and 1573 transitions. [2021-03-11 00:14:24,360 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:24,360 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1573 transitions. [2021-03-11 00:14:24,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:14:24,362 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:14:24,362 INFO L519 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] [2021-03-11 00:14:24,575 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:24,575 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:14:24,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:14:24,576 INFO L82 PathProgramCache]: Analyzing trace with hash 735427332, now seen corresponding path program 2 times [2021-03-11 00:14:24,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:14:24,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57526754] [2021-03-11 00:14:24,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:14:24,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:24,929 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:24,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57526754] [2021-03-11 00:14:24,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545541042] [2021-03-11 00:14:24,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:24,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:14:24,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:14:24,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-11 00:14:24,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:14:25,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-11 00:14:25,045 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:25,053 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:14:25,054 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-11 00:14:25,054 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:25 [2021-03-11 00:14:25,138 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-03-11 00:14:25,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-03-11 00:14:25,139 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:25,149 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:14:25,151 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-11 00:14:25,152 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:34 [2021-03-11 00:14:25,298 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-11 00:14:25,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:14:25,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-03-11 00:14:25,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232514882] [2021-03-11 00:14:25,299 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-11 00:14:25,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:14:25,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-11 00:14:25,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:14:25,300 INFO L87 Difference]: Start difference. First operand 490 states and 1573 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:27,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:14:27,088 INFO L93 Difference]: Finished difference Result 1157 states and 3418 transitions. [2021-03-11 00:14:27,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-03-11 00:14:27,089 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-03-11 00:14:27,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:14:27,092 INFO L225 Difference]: With dead ends: 1157 [2021-03-11 00:14:27,093 INFO L226 Difference]: Without dead ends: 1025 [2021-03-11 00:14:27,100 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 1609.3ms TimeCoverageRelationStatistics Valid=417, Invalid=2235, Unknown=0, NotChecked=0, Total=2652 [2021-03-11 00:14:27,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1025 states. [2021-03-11 00:14:27,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1025 to 537. [2021-03-11 00:14:27,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 536 states have (on average 3.1940298507462686) internal successors, (1712), 536 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:27,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 1712 transitions. [2021-03-11 00:14:27,121 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 1712 transitions. Word has length 28 [2021-03-11 00:14:27,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:14:27,122 INFO L480 AbstractCegarLoop]: Abstraction has 537 states and 1712 transitions. [2021-03-11 00:14:27,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:27,122 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 1712 transitions. [2021-03-11 00:14:27,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:14:27,124 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:14:27,124 INFO L519 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] [2021-03-11 00:14:27,331 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-03-11 00:14:27,331 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:14:27,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:14:27,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1417721472, now seen corresponding path program 14 times [2021-03-11 00:14:27,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:14:27,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438326290] [2021-03-11 00:14:27,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:14:27,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:27,671 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:27,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438326290] [2021-03-11 00:14:27,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091547226] [2021-03-11 00:14:27,672 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 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 [2021-03-11 00:14:27,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:14:27,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:14:27,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-11 00:14:27,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:14:27,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-11 00:14:27,817 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:27,825 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:14:27,827 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-11 00:14:27,827 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:22 [2021-03-11 00:14:27,892 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-03-11 00:14:27,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-03-11 00:14:27,894 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:27,906 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:14:27,911 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-11 00:14:27,911 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:34 [2021-03-11 00:14:28,022 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-11 00:14:28,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:14:28,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-03-11 00:14:28,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174194925] [2021-03-11 00:14:28,023 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-11 00:14:28,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:14:28,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-11 00:14:28,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-03-11 00:14:28,024 INFO L87 Difference]: Start difference. First operand 537 states and 1712 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:29,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:14:29,318 INFO L93 Difference]: Finished difference Result 1024 states and 3050 transitions. [2021-03-11 00:14:29,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-11 00:14:29,319 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-03-11 00:14:29,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:14:29,322 INFO L225 Difference]: With dead ends: 1024 [2021-03-11 00:14:29,322 INFO L226 Difference]: Without dead ends: 946 [2021-03-11 00:14:29,323 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 1320.3ms TimeCoverageRelationStatistics Valid=419, Invalid=1837, Unknown=0, NotChecked=0, Total=2256 [2021-03-11 00:14:29,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2021-03-11 00:14:29,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 637. [2021-03-11 00:14:29,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 636 states have (on average 3.10062893081761) internal successors, (1972), 636 states have internal predecessors, (1972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:29,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 1972 transitions. [2021-03-11 00:14:29,339 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 1972 transitions. Word has length 28 [2021-03-11 00:14:29,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:14:29,339 INFO L480 AbstractCegarLoop]: Abstraction has 637 states and 1972 transitions. [2021-03-11 00:14:29,339 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:29,339 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 1972 transitions. [2021-03-11 00:14:29,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:14:29,341 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:14:29,341 INFO L519 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] [2021-03-11 00:14:29,566 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-03-11 00:14:29,566 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:14:29,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:14:29,566 INFO L82 PathProgramCache]: Analyzing trace with hash 916230348, now seen corresponding path program 3 times [2021-03-11 00:14:29,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:14:29,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518552366] [2021-03-11 00:14:29,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:14:29,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:29,955 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:29,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518552366] [2021-03-11 00:14:29,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774862436] [2021-03-11 00:14:29,956 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 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 [2021-03-11 00:14:29,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-11 00:14:29,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:14:29,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-11 00:14:29,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:14:30,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-11 00:14:30,097 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:30,105 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:14:30,106 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-11 00:14:30,107 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:25 [2021-03-11 00:14:30,170 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-03-11 00:14:30,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-03-11 00:14:30,172 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:30,185 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:14:30,188 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-11 00:14:30,188 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:37 [2021-03-11 00:14:30,393 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-11 00:14:30,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:14:30,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-03-11 00:14:30,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106311539] [2021-03-11 00:14:30,396 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-11 00:14:30,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:14:30,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-11 00:14:30,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:14:30,397 INFO L87 Difference]: Start difference. First operand 637 states and 1972 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:33,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:14:33,261 INFO L93 Difference]: Finished difference Result 1838 states and 5313 transitions. [2021-03-11 00:14:33,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-03-11 00:14:33,262 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-03-11 00:14:33,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:14:33,266 INFO L225 Difference]: With dead ends: 1838 [2021-03-11 00:14:33,266 INFO L226 Difference]: Without dead ends: 1655 [2021-03-11 00:14:33,267 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 2345.3ms TimeCoverageRelationStatistics Valid=569, Invalid=3091, Unknown=0, NotChecked=0, Total=3660 [2021-03-11 00:14:33,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1655 states. [2021-03-11 00:14:33,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1655 to 692. [2021-03-11 00:14:33,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 691 states have (on average 3.1577424023154848) internal successors, (2182), 691 states have internal predecessors, (2182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:33,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 2182 transitions. [2021-03-11 00:14:33,291 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 2182 transitions. Word has length 28 [2021-03-11 00:14:33,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:14:33,291 INFO L480 AbstractCegarLoop]: Abstraction has 692 states and 2182 transitions. [2021-03-11 00:14:33,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:33,291 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 2182 transitions. [2021-03-11 00:14:33,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:14:33,294 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:14:33,294 INFO L519 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] [2021-03-11 00:14:33,507 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:33,507 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:14:33,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:14:33,507 INFO L82 PathProgramCache]: Analyzing trace with hash 937707268, now seen corresponding path program 15 times [2021-03-11 00:14:33,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:14:33,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791932173] [2021-03-11 00:14:33,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:14:33,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:33,909 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:33,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791932173] [2021-03-11 00:14:33,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445618833] [2021-03-11 00:14:33,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:33,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:14:33,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:14:33,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-11 00:14:33,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:14:34,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-11 00:14:34,044 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:34,053 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:14:34,056 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-11 00:14:34,056 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:25 [2021-03-11 00:14:34,166 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-03-11 00:14:34,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-03-11 00:14:34,168 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:34,179 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:14:34,184 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-11 00:14:34,185 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:34 [2021-03-11 00:14:34,315 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-11 00:14:34,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:14:34,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-03-11 00:14:34,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982805161] [2021-03-11 00:14:34,316 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-11 00:14:34,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:14:34,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-11 00:14:34,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-03-11 00:14:34,317 INFO L87 Difference]: Start difference. First operand 692 states and 2182 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:35,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:14:35,835 INFO L93 Difference]: Finished difference Result 1136 states and 3439 transitions. [2021-03-11 00:14:35,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-03-11 00:14:35,836 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-03-11 00:14:35,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:14:35,839 INFO L225 Difference]: With dead ends: 1136 [2021-03-11 00:14:35,839 INFO L226 Difference]: Without dead ends: 1058 [2021-03-11 00:14:35,840 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 1490.8ms TimeCoverageRelationStatistics Valid=406, Invalid=2044, Unknown=0, NotChecked=0, Total=2450 [2021-03-11 00:14:35,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1058 states. [2021-03-11 00:14:35,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1058 to 680. [2021-03-11 00:14:35,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 680 states, 679 states have (on average 3.1723122238586154) internal successors, (2154), 679 states have internal predecessors, (2154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:35,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 2154 transitions. [2021-03-11 00:14:35,859 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 2154 transitions. Word has length 28 [2021-03-11 00:14:35,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:14:35,860 INFO L480 AbstractCegarLoop]: Abstraction has 680 states and 2154 transitions. [2021-03-11 00:14:35,860 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:35,860 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 2154 transitions. [2021-03-11 00:14:35,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:14:35,862 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:14:35,862 INFO L519 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] [2021-03-11 00:14:36,075 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:36,075 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:14:36,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:14:36,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1490293068, now seen corresponding path program 16 times [2021-03-11 00:14:36,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:14:36,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046454087] [2021-03-11 00:14:36,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:14:36,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:36,412 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:36,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046454087] [2021-03-11 00:14:36,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016194164] [2021-03-11 00:14:36,413 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:14:36,447 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:14:36,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:14:36,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-11 00:14:36,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:36,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-03-11 00:14:36,645 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:36,655 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:14:36,656 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:14:36,656 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:24 [2021-03-11 00:14:36,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:36,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-03-11 00:14:36,733 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:36,744 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:14:36,746 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-11 00:14:36,746 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:31 [2021-03-11 00:14:36,834 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:36,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:14:36,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 24 [2021-03-11 00:14:36,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788698005] [2021-03-11 00:14:36,835 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-11 00:14:36,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:14:36,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-11 00:14:36,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-03-11 00:14:36,836 INFO L87 Difference]: Start difference. First operand 680 states and 2154 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:39,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:14:39,332 INFO L93 Difference]: Finished difference Result 1629 states and 4937 transitions. [2021-03-11 00:14:39,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-03-11 00:14:39,332 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-03-11 00:14:39,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:14:39,335 INFO L225 Difference]: With dead ends: 1629 [2021-03-11 00:14:39,335 INFO L226 Difference]: Without dead ends: 1293 [2021-03-11 00:14:39,336 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1282 ImplicationChecksByTransitivity, 2293.2ms TimeCoverageRelationStatistics Valid=735, Invalid=3425, Unknown=0, NotChecked=0, Total=4160 [2021-03-11 00:14:39,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1293 states. [2021-03-11 00:14:39,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1293 to 920. [2021-03-11 00:14:39,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 920 states, 919 states have (on average 3.263329706202394) internal successors, (2999), 919 states have internal predecessors, (2999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:39,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 920 states to 920 states and 2999 transitions. [2021-03-11 00:14:39,361 INFO L78 Accepts]: Start accepts. Automaton has 920 states and 2999 transitions. Word has length 28 [2021-03-11 00:14:39,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:14:39,361 INFO L480 AbstractCegarLoop]: Abstraction has 920 states and 2999 transitions. [2021-03-11 00:14:39,362 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:39,362 INFO L276 IsEmpty]: Start isEmpty. Operand 920 states and 2999 transitions. [2021-03-11 00:14:39,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:14:39,366 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:14:39,366 INFO L519 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] [2021-03-11 00:14:39,582 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:39,582 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:14:39,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:14:39,583 INFO L82 PathProgramCache]: Analyzing trace with hash -836691140, now seen corresponding path program 4 times [2021-03-11 00:14:39,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:14:39,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227659239] [2021-03-11 00:14:39,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:14:39,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:40,014 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:40,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227659239] [2021-03-11 00:14:40,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308174458] [2021-03-11 00:14:40,014 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:40,034 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:14:40,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:14:40,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-11 00:14:40,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:14:40,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-11 00:14:40,148 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:40,156 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:14:40,157 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-11 00:14:40,158 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:25 [2021-03-11 00:14:40,273 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-03-11 00:14:40,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-03-11 00:14:40,275 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:40,289 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:14:40,294 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-11 00:14:40,294 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:34 [2021-03-11 00:14:40,459 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-11 00:14:40,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:14:40,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-03-11 00:14:40,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104488721] [2021-03-11 00:14:40,460 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-11 00:14:40,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:14:40,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-11 00:14:40,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:14:40,461 INFO L87 Difference]: Start difference. First operand 920 states and 2999 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:42,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:14:42,230 INFO L93 Difference]: Finished difference Result 1891 states and 5788 transitions. [2021-03-11 00:14:42,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-11 00:14:42,231 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-03-11 00:14:42,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:14:42,234 INFO L225 Difference]: With dead ends: 1891 [2021-03-11 00:14:42,234 INFO L226 Difference]: Without dead ends: 1768 [2021-03-11 00:14:42,235 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 1788.8ms TimeCoverageRelationStatistics Valid=297, Invalid=1509, Unknown=0, NotChecked=0, Total=1806 [2021-03-11 00:14:42,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1768 states. [2021-03-11 00:14:42,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1768 to 1049. [2021-03-11 00:14:42,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1049 states, 1048 states have (on average 3.25381679389313) internal successors, (3410), 1048 states have internal predecessors, (3410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:42,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1049 states to 1049 states and 3410 transitions. [2021-03-11 00:14:42,258 INFO L78 Accepts]: Start accepts. Automaton has 1049 states and 3410 transitions. Word has length 28 [2021-03-11 00:14:42,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:14:42,258 INFO L480 AbstractCegarLoop]: Abstraction has 1049 states and 3410 transitions. [2021-03-11 00:14:42,258 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:42,258 INFO L276 IsEmpty]: Start isEmpty. Operand 1049 states and 3410 transitions. [2021-03-11 00:14:42,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:14:42,260 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:14:42,261 INFO L519 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] [2021-03-11 00:14:42,482 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-03-11 00:14:42,482 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:14:42,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:14:42,483 INFO L82 PathProgramCache]: Analyzing trace with hash -556203584, now seen corresponding path program 5 times [2021-03-11 00:14:42,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:14:42,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965414486] [2021-03-11 00:14:42,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:14:42,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:42,777 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:42,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965414486] [2021-03-11 00:14:42,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260317464] [2021-03-11 00:14:42,777 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 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 [2021-03-11 00:14:42,795 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:14:42,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:14:42,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-11 00:14:42,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:14:42,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-11 00:14:42,903 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:42,912 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:14:42,913 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-11 00:14:42,913 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:22 [2021-03-11 00:14:42,980 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-03-11 00:14:42,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-03-11 00:14:42,982 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:42,996 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:14:42,999 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-11 00:14:42,999 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:37 [2021-03-11 00:14:43,229 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:43,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:14:43,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-11 00:14:43,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148788158] [2021-03-11 00:14:43,230 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-11 00:14:43,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:14:43,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-11 00:14:43,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-03-11 00:14:43,231 INFO L87 Difference]: Start difference. First operand 1049 states and 3410 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:45,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:14:45,196 INFO L93 Difference]: Finished difference Result 2029 states and 6160 transitions. [2021-03-11 00:14:45,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-11 00:14:45,197 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-03-11 00:14:45,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:14:45,216 INFO L225 Difference]: With dead ends: 2029 [2021-03-11 00:14:45,217 INFO L226 Difference]: Without dead ends: 1767 [2021-03-11 00:14:45,231 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 1681.9ms TimeCoverageRelationStatistics Valid=436, Invalid=2216, Unknown=0, NotChecked=0, Total=2652 [2021-03-11 00:14:45,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1767 states. [2021-03-11 00:14:45,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1767 to 1070. [2021-03-11 00:14:45,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1070 states, 1069 states have (on average 3.2198316183348923) internal successors, (3442), 1069 states have internal predecessors, (3442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:45,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1070 states to 1070 states and 3442 transitions. [2021-03-11 00:14:45,254 INFO L78 Accepts]: Start accepts. Automaton has 1070 states and 3442 transitions. Word has length 28 [2021-03-11 00:14:45,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:14:45,254 INFO L480 AbstractCegarLoop]: Abstraction has 1070 states and 3442 transitions. [2021-03-11 00:14:45,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:45,254 INFO L276 IsEmpty]: Start isEmpty. Operand 1070 states and 3442 transitions. [2021-03-11 00:14:45,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:14:45,257 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:14:45,257 INFO L519 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] [2021-03-11 00:14:45,471 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-03-11 00:14:45,471 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:14:45,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:14:45,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1520630964, now seen corresponding path program 6 times [2021-03-11 00:14:45,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:14:45,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238813271] [2021-03-11 00:14:45,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:14:45,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:45,839 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:45,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238813271] [2021-03-11 00:14:45,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868846930] [2021-03-11 00:14:45,839 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:45,857 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:14:45,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:14:45,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-11 00:14:45,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:14:45,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-11 00:14:45,943 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:45,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:14:45,955 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-11 00:14:45,955 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:25 [2021-03-11 00:14:45,996 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-03-11 00:14:45,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-03-11 00:14:45,998 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:46,009 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:14:46,011 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-11 00:14:46,012 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:33, output treesize:32 [2021-03-11 00:14:46,081 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-03-11 00:14:46,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-03-11 00:14:46,083 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:46,096 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:14:46,099 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-11 00:14:46,099 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:37 [2021-03-11 00:14:46,284 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:14:46,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:14:46,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-03-11 00:14:46,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940885841] [2021-03-11 00:14:46,285 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-11 00:14:46,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:14:46,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-11 00:14:46,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:14:46,285 INFO L87 Difference]: Start difference. First operand 1070 states and 3442 transitions. Second operand has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:48,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:14:48,034 INFO L93 Difference]: Finished difference Result 2234 states and 6886 transitions. [2021-03-11 00:14:48,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-03-11 00:14:48,034 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-03-11 00:14:48,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:14:48,041 INFO L225 Difference]: With dead ends: 2234 [2021-03-11 00:14:48,041 INFO L226 Difference]: Without dead ends: 2061 [2021-03-11 00:14:48,042 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 809 ImplicationChecksByTransitivity, 1564.6ms TimeCoverageRelationStatistics Valid=382, Invalid=2270, Unknown=0, NotChecked=0, Total=2652 [2021-03-11 00:14:48,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2061 states. [2021-03-11 00:14:48,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2061 to 1141. [2021-03-11 00:14:48,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1141 states, 1140 states have (on average 3.219298245614035) internal successors, (3670), 1140 states have internal predecessors, (3670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:48,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 3670 transitions. [2021-03-11 00:14:48,076 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 3670 transitions. Word has length 28 [2021-03-11 00:14:48,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:14:48,076 INFO L480 AbstractCegarLoop]: Abstraction has 1141 states and 3670 transitions. [2021-03-11 00:14:48,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:48,076 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 3670 transitions. [2021-03-11 00:14:48,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:14:48,079 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:14:48,080 INFO L519 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] [2021-03-11 00:14:48,293 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:48,294 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:14:48,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:14:48,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1530790852, now seen corresponding path program 7 times [2021-03-11 00:14:48,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:14:48,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716888051] [2021-03-11 00:14:48,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:14:48,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:48,691 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:48,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716888051] [2021-03-11 00:14:48,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44521877] [2021-03-11 00:14:48,691 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:48,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:48,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-11 00:14:48,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:14:48,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-11 00:14:48,876 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:48,889 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:14:48,891 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-11 00:14:48,892 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:30 [2021-03-11 00:14:48,952 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-03-11 00:14:48,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-03-11 00:14:48,954 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:48,971 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:14:48,977 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-11 00:14:48,977 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:42 [2021-03-11 00:14:49,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:49,073 INFO L354 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2021-03-11 00:14:49,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2021-03-11 00:14:49,076 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:49,099 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:14:49,109 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-03-11 00:14:49,109 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:50, output treesize:49 [2021-03-11 00:14:49,390 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:49,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:14:49,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-03-11 00:14:49,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805489923] [2021-03-11 00:14:49,392 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-11 00:14:49,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:14:49,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-11 00:14:49,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-03-11 00:14:49,393 INFO L87 Difference]: Start difference. First operand 1141 states and 3670 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:50,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:14:50,587 INFO L93 Difference]: Finished difference Result 2251 states and 7100 transitions. [2021-03-11 00:14:50,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-11 00:14:50,587 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-03-11 00:14:50,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:14:50,592 INFO L225 Difference]: With dead ends: 2251 [2021-03-11 00:14:50,592 INFO L226 Difference]: Without dead ends: 1891 [2021-03-11 00:14:50,592 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 1288.7ms TimeCoverageRelationStatistics Valid=285, Invalid=1355, Unknown=0, NotChecked=0, Total=1640 [2021-03-11 00:14:50,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1891 states. [2021-03-11 00:14:50,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1891 to 1165. [2021-03-11 00:14:50,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1165 states, 1164 states have (on average 3.2371134020618557) internal successors, (3768), 1164 states have internal predecessors, (3768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:50,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1165 states to 1165 states and 3768 transitions. [2021-03-11 00:14:50,620 INFO L78 Accepts]: Start accepts. Automaton has 1165 states and 3768 transitions. Word has length 28 [2021-03-11 00:14:50,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:14:50,620 INFO L480 AbstractCegarLoop]: Abstraction has 1165 states and 3768 transitions. [2021-03-11 00:14:50,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:50,620 INFO L276 IsEmpty]: Start isEmpty. Operand 1165 states and 3768 transitions. [2021-03-11 00:14:50,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:14:50,623 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:14:50,623 INFO L519 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] [2021-03-11 00:14:50,845 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-03-11 00:14:50,845 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:14:50,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:14:50,845 INFO L82 PathProgramCache]: Analyzing trace with hash 55569732, now seen corresponding path program 8 times [2021-03-11 00:14:50,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:14:50,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372264952] [2021-03-11 00:14:50,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:14:50,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:51,412 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:51,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372264952] [2021-03-11 00:14:51,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237530264] [2021-03-11 00:14:51,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:51,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:14:51,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:14:51,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-11 00:14:51,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:14:51,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-11 00:14:51,556 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:51,565 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:14:51,567 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-11 00:14:51,567 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:22 [2021-03-11 00:14:51,627 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-03-11 00:14:51,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-03-11 00:14:51,629 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:51,641 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:14:51,645 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-11 00:14:51,645 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:34 [2021-03-11 00:14:51,857 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:51,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:14:51,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2021-03-11 00:14:51,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103345657] [2021-03-11 00:14:51,857 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:14:51,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:14:51,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:14:51,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:14:51,859 INFO L87 Difference]: Start difference. First operand 1165 states and 3768 transitions. Second operand has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:52,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:14:52,835 INFO L93 Difference]: Finished difference Result 2014 states and 6436 transitions. [2021-03-11 00:14:52,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-11 00:14:52,836 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-03-11 00:14:52,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:14:52,840 INFO L225 Difference]: With dead ends: 2014 [2021-03-11 00:14:52,840 INFO L226 Difference]: Without dead ends: 1692 [2021-03-11 00:14:52,841 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1146.8ms TimeCoverageRelationStatistics Valid=161, Invalid=769, Unknown=0, NotChecked=0, Total=930 [2021-03-11 00:14:52,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1692 states. [2021-03-11 00:14:52,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1692 to 1114. [2021-03-11 00:14:52,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1114 states, 1113 states have (on average 3.225516621743037) internal successors, (3590), 1113 states have internal predecessors, (3590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:52,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1114 states to 1114 states and 3590 transitions. [2021-03-11 00:14:52,870 INFO L78 Accepts]: Start accepts. Automaton has 1114 states and 3590 transitions. Word has length 28 [2021-03-11 00:14:52,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:14:52,870 INFO L480 AbstractCegarLoop]: Abstraction has 1114 states and 3590 transitions. [2021-03-11 00:14:52,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:52,871 INFO L276 IsEmpty]: Start isEmpty. Operand 1114 states and 3590 transitions. [2021-03-11 00:14:52,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:14:52,874 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:14:52,874 INFO L519 BasicCegarLoop]: trace histogram [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] [2021-03-11 00:14:53,097 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:53,097 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:14:53,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:14:53,097 INFO L82 PathProgramCache]: Analyzing trace with hash 930891622, now seen corresponding path program 9 times [2021-03-11 00:14:53,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:14:53,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297400948] [2021-03-11 00:14:53,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:14:53,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:53,148 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:53,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297400948] [2021-03-11 00:14:53,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034408596] [2021-03-11 00:14:53,149 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 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 [2021-03-11 00:14:53,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-11 00:14:53,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:14:53,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:14:53,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:14:53,301 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:14:53,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:14:53,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-03-11 00:14:53,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663154215] [2021-03-11 00:14:53,302 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:14:53,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:14:53,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:14:53,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:14:53,302 INFO L87 Difference]: Start difference. First operand 1114 states and 3590 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:54,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:14:54,811 INFO L93 Difference]: Finished difference Result 5462 states and 16045 transitions. [2021-03-11 00:14:54,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-03-11 00:14:54,811 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:14:54,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:14:54,821 INFO L225 Difference]: With dead ends: 5462 [2021-03-11 00:14:54,821 INFO L226 Difference]: Without dead ends: 5462 [2021-03-11 00:14:54,822 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3083 ImplicationChecksByTransitivity, 978.9ms TimeCoverageRelationStatistics Valid=1548, Invalid=6284, Unknown=0, NotChecked=0, Total=7832 [2021-03-11 00:14:54,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5462 states. [2021-03-11 00:14:54,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5462 to 1274. [2021-03-11 00:14:54,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1274 states, 1273 states have (on average 3.344854673998429) internal successors, (4258), 1273 states have internal predecessors, (4258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:54,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1274 states to 1274 states and 4258 transitions. [2021-03-11 00:14:54,892 INFO L78 Accepts]: Start accepts. Automaton has 1274 states and 4258 transitions. Word has length 30 [2021-03-11 00:14:54,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:14:54,892 INFO L480 AbstractCegarLoop]: Abstraction has 1274 states and 4258 transitions. [2021-03-11 00:14:54,892 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:54,892 INFO L276 IsEmpty]: Start isEmpty. Operand 1274 states and 4258 transitions. [2021-03-11 00:14:54,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:14:54,896 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:14:54,896 INFO L519 BasicCegarLoop]: trace histogram [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] [2021-03-11 00:14:55,119 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-03-11 00:14:55,119 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:14:55,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:14:55,120 INFO L82 PathProgramCache]: Analyzing trace with hash -707538508, now seen corresponding path program 10 times [2021-03-11 00:14:55,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:14:55,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211010500] [2021-03-11 00:14:55,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:14:55,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:55,175 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:55,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211010500] [2021-03-11 00:14:55,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285045910] [2021-03-11 00:14:55,176 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 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 [2021-03-11 00:14:55,197 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:14:55,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:14:55,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:14:55,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:14:55,331 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:14:55,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:14:55,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-11 00:14:55,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424913675] [2021-03-11 00:14:55,332 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-11 00:14:55,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:14:55,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-11 00:14:55,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:14:55,334 INFO L87 Difference]: Start difference. First operand 1274 states and 4258 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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) [2021-03-11 00:14:56,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:14:56,220 INFO L93 Difference]: Finished difference Result 4112 states and 12021 transitions. [2021-03-11 00:14:56,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-03-11 00:14:56,220 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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 30 [2021-03-11 00:14:56,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:14:56,231 INFO L225 Difference]: With dead ends: 4112 [2021-03-11 00:14:56,231 INFO L226 Difference]: Without dead ends: 4088 [2021-03-11 00:14:56,235 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1051 ImplicationChecksByTransitivity, 506.5ms TimeCoverageRelationStatistics Valid=680, Invalid=2400, Unknown=0, NotChecked=0, Total=3080 [2021-03-11 00:14:56,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4088 states. [2021-03-11 00:14:56,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4088 to 1288. [2021-03-11 00:14:56,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1288 states, 1287 states have (on average 3.3387723387723387) internal successors, (4297), 1287 states have internal predecessors, (4297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:56,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 4297 transitions. [2021-03-11 00:14:56,291 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 4297 transitions. Word has length 30 [2021-03-11 00:14:56,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:14:56,291 INFO L480 AbstractCegarLoop]: Abstraction has 1288 states and 4297 transitions. [2021-03-11 00:14:56,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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) [2021-03-11 00:14:56,292 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 4297 transitions. [2021-03-11 00:14:56,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:14:56,295 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:14:56,295 INFO L519 BasicCegarLoop]: trace histogram [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] [2021-03-11 00:14:56,511 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-03-11 00:14:56,511 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:14:56,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:14:56,511 INFO L82 PathProgramCache]: Analyzing trace with hash -437028816, now seen corresponding path program 11 times [2021-03-11 00:14:56,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:14:56,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467174968] [2021-03-11 00:14:56,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:14:56,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:56,563 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:56,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467174968] [2021-03-11 00:14:56,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142158830] [2021-03-11 00:14:56,563 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:14:56,590 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-11 00:14:56,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:14:56,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:14:56,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:56,711 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:14:56,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:14:56,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-11 00:14:56,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473504674] [2021-03-11 00:14:56,712 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-11 00:14:56,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:14:56,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-11 00:14:56,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:14:56,713 INFO L87 Difference]: Start difference. First operand 1288 states and 4297 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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) [2021-03-11 00:14:57,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:14:57,670 INFO L93 Difference]: Finished difference Result 4322 states and 12488 transitions. [2021-03-11 00:14:57,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-03-11 00:14:57,674 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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 30 [2021-03-11 00:14:57,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:14:57,681 INFO L225 Difference]: With dead ends: 4322 [2021-03-11 00:14:57,682 INFO L226 Difference]: Without dead ends: 4322 [2021-03-11 00:14:57,682 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1262 ImplicationChecksByTransitivity, 591.3ms TimeCoverageRelationStatistics Valid=757, Invalid=2783, Unknown=0, NotChecked=0, Total=3540 [2021-03-11 00:14:57,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4322 states. [2021-03-11 00:14:57,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4322 to 1090. [2021-03-11 00:14:57,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1090 states, 1089 states have (on average 3.1799816345270893) internal successors, (3463), 1089 states have internal predecessors, (3463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:57,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1090 states to 1090 states and 3463 transitions. [2021-03-11 00:14:57,723 INFO L78 Accepts]: Start accepts. Automaton has 1090 states and 3463 transitions. Word has length 30 [2021-03-11 00:14:57,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:14:57,723 INFO L480 AbstractCegarLoop]: Abstraction has 1090 states and 3463 transitions. [2021-03-11 00:14:57,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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) [2021-03-11 00:14:57,724 INFO L276 IsEmpty]: Start isEmpty. Operand 1090 states and 3463 transitions. [2021-03-11 00:14:57,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:14:57,726 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:14:57,726 INFO L519 BasicCegarLoop]: trace histogram [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] [2021-03-11 00:14:57,939 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-03-11 00:14:57,939 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:14:57,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:14:57,939 INFO L82 PathProgramCache]: Analyzing trace with hash -150600370, now seen corresponding path program 12 times [2021-03-11 00:14:57,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:14:57,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994305167] [2021-03-11 00:14:57,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:14:57,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:57,990 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:57,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994305167] [2021-03-11 00:14:57,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693493134] [2021-03-11 00:14:57,990 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 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 [2021-03-11 00:14:58,032 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:14:58,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:14:58,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:14:58,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:14:58,120 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:14:58,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:14:58,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-11 00:14:58,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648013049] [2021-03-11 00:14:58,121 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:14:58,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:14:58,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:14:58,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:14:58,122 INFO L87 Difference]: Start difference. First operand 1090 states and 3463 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:58,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:14:58,961 INFO L93 Difference]: Finished difference Result 3937 states and 11665 transitions. [2021-03-11 00:14:58,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-03-11 00:14:58,961 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:14:58,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:14:58,968 INFO L225 Difference]: With dead ends: 3937 [2021-03-11 00:14:58,968 INFO L226 Difference]: Without dead ends: 3861 [2021-03-11 00:14:58,969 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 516.8ms TimeCoverageRelationStatistics Valid=584, Invalid=2172, Unknown=0, NotChecked=0, Total=2756 [2021-03-11 00:14:58,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3861 states. [2021-03-11 00:14:59,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3861 to 1226. [2021-03-11 00:14:59,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1226 states, 1225 states have (on average 3.244081632653061) internal successors, (3974), 1225 states have internal predecessors, (3974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:59,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1226 states to 1226 states and 3974 transitions. [2021-03-11 00:14:59,006 INFO L78 Accepts]: Start accepts. Automaton has 1226 states and 3974 transitions. Word has length 30 [2021-03-11 00:14:59,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:14:59,006 INFO L480 AbstractCegarLoop]: Abstraction has 1226 states and 3974 transitions. [2021-03-11 00:14:59,006 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:59,006 INFO L276 IsEmpty]: Start isEmpty. Operand 1226 states and 3974 transitions. [2021-03-11 00:14:59,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:14:59,009 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:14:59,009 INFO L519 BasicCegarLoop]: trace histogram [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] [2021-03-11 00:14:59,221 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:59,221 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:14:59,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:14:59,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1642605102, now seen corresponding path program 13 times [2021-03-11 00:14:59,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:14:59,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008346067] [2021-03-11 00:14:59,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:14:59,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:59,265 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:59,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008346067] [2021-03-11 00:14:59,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26964845] [2021-03-11 00:14:59,266 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 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 [2021-03-11 00:14:59,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:59,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:14:59,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:14:59,368 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:14:59,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:14:59,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-11 00:14:59,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388591346] [2021-03-11 00:14:59,369 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:14:59,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:14:59,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:14:59,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:14:59,369 INFO L87 Difference]: Start difference. First operand 1226 states and 3974 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:00,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:15:00,215 INFO L93 Difference]: Finished difference Result 3748 states and 11353 transitions. [2021-03-11 00:15:00,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-03-11 00:15:00,216 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:15:00,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:15:00,222 INFO L225 Difference]: With dead ends: 3748 [2021-03-11 00:15:00,222 INFO L226 Difference]: Without dead ends: 3728 [2021-03-11 00:15:00,223 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 995 ImplicationChecksByTransitivity, 538.6ms TimeCoverageRelationStatistics Valid=649, Invalid=2431, Unknown=0, NotChecked=0, Total=3080 [2021-03-11 00:15:00,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3728 states. [2021-03-11 00:15:00,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3728 to 1495. [2021-03-11 00:15:00,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1495 states, 1494 states have (on average 3.2402945113788486) internal successors, (4841), 1494 states have internal predecessors, (4841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:00,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1495 states to 1495 states and 4841 transitions. [2021-03-11 00:15:00,269 INFO L78 Accepts]: Start accepts. Automaton has 1495 states and 4841 transitions. Word has length 30 [2021-03-11 00:15:00,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:15:00,269 INFO L480 AbstractCegarLoop]: Abstraction has 1495 states and 4841 transitions. [2021-03-11 00:15:00,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:00,269 INFO L276 IsEmpty]: Start isEmpty. Operand 1495 states and 4841 transitions. [2021-03-11 00:15:00,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:15:00,273 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:15:00,273 INFO L519 BasicCegarLoop]: trace histogram [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] [2021-03-11 00:15:00,488 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-03-11 00:15:00,489 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:15:00,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:15:00,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1372095410, now seen corresponding path program 14 times [2021-03-11 00:15:00,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:15:00,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264974983] [2021-03-11 00:15:00,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:15:00,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:15:00,544 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:15:00,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264974983] [2021-03-11 00:15:00,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989135086] [2021-03-11 00:15:00,544 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 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 [2021-03-11 00:15:00,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:15:00,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:15:00,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:15:00,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:15:00,688 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:15:00,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:15:00,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-11 00:15:00,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480323769] [2021-03-11 00:15:00,689 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:15:00,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:15:00,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:15:00,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:15:00,690 INFO L87 Difference]: Start difference. First operand 1495 states and 4841 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:01,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:15:01,693 INFO L93 Difference]: Finished difference Result 4011 states and 11996 transitions. [2021-03-11 00:15:01,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-03-11 00:15:01,694 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:15:01,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:15:01,701 INFO L225 Difference]: With dead ends: 4011 [2021-03-11 00:15:01,701 INFO L226 Difference]: Without dead ends: 4011 [2021-03-11 00:15:01,702 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1494 ImplicationChecksByTransitivity, 671.4ms TimeCoverageRelationStatistics Valid=869, Invalid=3291, Unknown=0, NotChecked=0, Total=4160 [2021-03-11 00:15:01,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4011 states. [2021-03-11 00:15:01,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4011 to 1317. [2021-03-11 00:15:01,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1317 states, 1316 states have (on average 3.3054711246200608) internal successors, (4350), 1316 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:01,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1317 states to 1317 states and 4350 transitions. [2021-03-11 00:15:01,753 INFO L78 Accepts]: Start accepts. Automaton has 1317 states and 4350 transitions. Word has length 30 [2021-03-11 00:15:01,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:15:01,753 INFO L480 AbstractCegarLoop]: Abstraction has 1317 states and 4350 transitions. [2021-03-11 00:15:01,753 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:01,753 INFO L276 IsEmpty]: Start isEmpty. Operand 1317 states and 4350 transitions. [2021-03-11 00:15:01,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:15:01,756 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:15:01,756 INFO L519 BasicCegarLoop]: trace histogram [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] [2021-03-11 00:15:01,981 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:15:01,982 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:15:01,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:15:01,982 INFO L82 PathProgramCache]: Analyzing trace with hash -52824090, now seen corresponding path program 15 times [2021-03-11 00:15:01,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:15:01,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81749194] [2021-03-11 00:15:01,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:15:01,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:15:02,047 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:15:02,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81749194] [2021-03-11 00:15:02,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654133018] [2021-03-11 00:15:02,048 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 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 [2021-03-11 00:15:02,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-11 00:15:02,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:15:02,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:15:02,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:15:02,230 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:15:02,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:15:02,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-03-11 00:15:02,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387456316] [2021-03-11 00:15:02,231 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:15:02,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:15:02,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:15:02,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:15:02,232 INFO L87 Difference]: Start difference. First operand 1317 states and 4350 transitions. Second operand has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:03,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:15:03,478 INFO L93 Difference]: Finished difference Result 5592 states and 17120 transitions. [2021-03-11 00:15:03,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-03-11 00:15:03,478 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:15:03,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:15:03,501 INFO L225 Difference]: With dead ends: 5592 [2021-03-11 00:15:03,501 INFO L226 Difference]: Without dead ends: 5592 [2021-03-11 00:15:03,502 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1796 ImplicationChecksByTransitivity, 838.6ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-03-11 00:15:03,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5592 states. [2021-03-11 00:15:03,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5592 to 1593. [2021-03-11 00:15:03,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1593 states, 1592 states have (on average 3.4233668341708543) internal successors, (5450), 1592 states have internal predecessors, (5450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:03,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1593 states to 1593 states and 5450 transitions. [2021-03-11 00:15:03,555 INFO L78 Accepts]: Start accepts. Automaton has 1593 states and 5450 transitions. Word has length 30 [2021-03-11 00:15:03,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:15:03,556 INFO L480 AbstractCegarLoop]: Abstraction has 1593 states and 5450 transitions. [2021-03-11 00:15:03,556 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:03,556 INFO L276 IsEmpty]: Start isEmpty. Operand 1593 states and 5450 transitions. [2021-03-11 00:15:03,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:15:03,559 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:15:03,559 INFO L519 BasicCegarLoop]: trace histogram [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] [2021-03-11 00:15:03,759 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-03-11 00:15:03,760 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:15:03,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:15:03,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1172821128, now seen corresponding path program 16 times [2021-03-11 00:15:03,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:15:03,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651025379] [2021-03-11 00:15:03,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:15:03,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:15:03,807 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:15:03,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651025379] [2021-03-11 00:15:03,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475033161] [2021-03-11 00:15:03,808 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:15:03,845 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:15:03,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:15:03,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:15:03,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:15:03,961 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:15:03,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:15:03,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-03-11 00:15:03,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900094898] [2021-03-11 00:15:03,962 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-11 00:15:03,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:15:03,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-11 00:15:03,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-03-11 00:15:03,962 INFO L87 Difference]: Start difference. First operand 1593 states and 5450 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:05,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:15:05,010 INFO L93 Difference]: Finished difference Result 5179 states and 15726 transitions. [2021-03-11 00:15:05,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-03-11 00:15:05,011 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:15:05,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:15:05,019 INFO L225 Difference]: With dead ends: 5179 [2021-03-11 00:15:05,019 INFO L226 Difference]: Without dead ends: 5159 [2021-03-11 00:15:05,020 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1141 ImplicationChecksByTransitivity, 607.3ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-03-11 00:15:05,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5159 states. [2021-03-11 00:15:05,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5159 to 1603. [2021-03-11 00:15:05,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1603 states, 1602 states have (on average 3.4213483146067416) internal successors, (5481), 1602 states have internal predecessors, (5481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:05,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1603 states to 1603 states and 5481 transitions. [2021-03-11 00:15:05,069 INFO L78 Accepts]: Start accepts. Automaton has 1603 states and 5481 transitions. Word has length 30 [2021-03-11 00:15:05,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:15:05,069 INFO L480 AbstractCegarLoop]: Abstraction has 1603 states and 5481 transitions. [2021-03-11 00:15:05,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:05,069 INFO L276 IsEmpty]: Start isEmpty. Operand 1603 states and 5481 transitions. [2021-03-11 00:15:05,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:15:05,073 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:15:05,073 INFO L519 BasicCegarLoop]: trace histogram [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] [2021-03-11 00:15:05,290 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-03-11 00:15:05,290 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:15:05,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:15:05,290 INFO L82 PathProgramCache]: Analyzing trace with hash -902311436, now seen corresponding path program 17 times [2021-03-11 00:15:05,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:15:05,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571293553] [2021-03-11 00:15:05,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:15:05,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:15:05,334 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:15:05,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571293553] [2021-03-11 00:15:05,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961290560] [2021-03-11 00:15:05,335 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 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 [2021-03-11 00:15:05,355 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-11 00:15:05,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:15:05,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:15:05,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:15:05,495 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:15:05,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:15:05,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-03-11 00:15:05,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338278792] [2021-03-11 00:15:05,495 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-11 00:15:05,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:15:05,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-11 00:15:05,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-03-11 00:15:05,496 INFO L87 Difference]: Start difference. First operand 1603 states and 5481 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:06,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:15:06,647 INFO L93 Difference]: Finished difference Result 5490 states and 16477 transitions. [2021-03-11 00:15:06,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-03-11 00:15:06,647 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:15:06,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:15:06,656 INFO L225 Difference]: With dead ends: 5490 [2021-03-11 00:15:06,656 INFO L226 Difference]: Without dead ends: 5490 [2021-03-11 00:15:06,657 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1501 ImplicationChecksByTransitivity, 714.4ms TimeCoverageRelationStatistics Valid=944, Invalid=3216, Unknown=0, NotChecked=0, Total=4160 [2021-03-11 00:15:06,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5490 states. [2021-03-11 00:15:06,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5490 to 1592. [2021-03-11 00:15:06,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1592 states, 1591 states have (on average 3.4223758642363293) internal successors, (5445), 1591 states have internal predecessors, (5445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:06,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1592 states to 1592 states and 5445 transitions. [2021-03-11 00:15:06,712 INFO L78 Accepts]: Start accepts. Automaton has 1592 states and 5445 transitions. Word has length 30 [2021-03-11 00:15:06,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:15:06,713 INFO L480 AbstractCegarLoop]: Abstraction has 1592 states and 5445 transitions. [2021-03-11 00:15:06,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:06,714 INFO L276 IsEmpty]: Start isEmpty. Operand 1592 states and 5445 transitions. [2021-03-11 00:15:06,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:15:06,718 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:15:06,718 INFO L519 BasicCegarLoop]: trace histogram [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] [2021-03-11 00:15:06,941 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-03-11 00:15:06,941 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:15:06,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:15:06,941 INFO L82 PathProgramCache]: Analyzing trace with hash -317283250, now seen corresponding path program 18 times [2021-03-11 00:15:06,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:15:06,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113331416] [2021-03-11 00:15:06,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:15:06,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:15:06,996 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:15:06,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113331416] [2021-03-11 00:15:06,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895293049] [2021-03-11 00:15:06,997 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-11 00:15:07,018 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:15:07,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:15:07,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:15:07,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:15:07,123 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:15:07,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:15:07,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-03-11 00:15:07,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027358938] [2021-03-11 00:15:07,124 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-11 00:15:07,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:15:07,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-11 00:15:07,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:15:07,125 INFO L87 Difference]: Start difference. First operand 1592 states and 5445 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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) [2021-03-11 00:15:07,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:15:07,890 INFO L93 Difference]: Finished difference Result 4892 states and 15553 transitions. [2021-03-11 00:15:07,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-03-11 00:15:07,891 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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 30 [2021-03-11 00:15:07,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:15:07,899 INFO L225 Difference]: With dead ends: 4892 [2021-03-11 00:15:07,900 INFO L226 Difference]: Without dead ends: 4844 [2021-03-11 00:15:07,900 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 445.5ms TimeCoverageRelationStatistics Valid=498, Invalid=1758, Unknown=0, NotChecked=0, Total=2256 [2021-03-11 00:15:07,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4844 states. [2021-03-11 00:15:07,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4844 to 1720. [2021-03-11 00:15:07,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1720 states, 1719 states have (on average 3.4543339150668992) internal successors, (5938), 1719 states have internal predecessors, (5938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:07,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1720 states to 1720 states and 5938 transitions. [2021-03-11 00:15:07,951 INFO L78 Accepts]: Start accepts. Automaton has 1720 states and 5938 transitions. Word has length 30 [2021-03-11 00:15:07,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:15:07,951 INFO L480 AbstractCegarLoop]: Abstraction has 1720 states and 5938 transitions. [2021-03-11 00:15:07,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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) [2021-03-11 00:15:07,951 INFO L276 IsEmpty]: Start isEmpty. Operand 1720 states and 5938 transitions. [2021-03-11 00:15:07,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:15:07,955 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:15:07,955 INFO L519 BasicCegarLoop]: trace histogram [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] [2021-03-11 00:15:08,155 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-03-11 00:15:08,155 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:15:08,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:15:08,156 INFO L82 PathProgramCache]: Analyzing trace with hash -1809287982, now seen corresponding path program 19 times [2021-03-11 00:15:08,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:15:08,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7417685] [2021-03-11 00:15:08,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:15:08,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:15:08,212 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:15:08,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7417685] [2021-03-11 00:15:08,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929072653] [2021-03-11 00:15:08,213 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:15:08,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:15:08,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:15:08,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:15:08,363 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:15:08,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:15:08,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-03-11 00:15:08,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393126889] [2021-03-11 00:15:08,364 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-11 00:15:08,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:15:08,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-11 00:15:08,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:15:08,365 INFO L87 Difference]: Start difference. First operand 1720 states and 5938 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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) [2021-03-11 00:15:09,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:15:09,371 INFO L93 Difference]: Finished difference Result 5688 states and 17607 transitions. [2021-03-11 00:15:09,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-03-11 00:15:09,371 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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 30 [2021-03-11 00:15:09,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:15:09,382 INFO L225 Difference]: With dead ends: 5688 [2021-03-11 00:15:09,382 INFO L226 Difference]: Without dead ends: 5672 [2021-03-11 00:15:09,382 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 632.3ms TimeCoverageRelationStatistics Valid=736, Invalid=2804, Unknown=0, NotChecked=0, Total=3540 [2021-03-11 00:15:09,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5672 states. [2021-03-11 00:15:09,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5672 to 1975. [2021-03-11 00:15:09,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1975 states, 1974 states have (on average 3.498480243161094) internal successors, (6906), 1974 states have internal predecessors, (6906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:09,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1975 states to 1975 states and 6906 transitions. [2021-03-11 00:15:09,444 INFO L78 Accepts]: Start accepts. Automaton has 1975 states and 6906 transitions. Word has length 30 [2021-03-11 00:15:09,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:15:09,444 INFO L480 AbstractCegarLoop]: Abstraction has 1975 states and 6906 transitions. [2021-03-11 00:15:09,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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) [2021-03-11 00:15:09,445 INFO L276 IsEmpty]: Start isEmpty. Operand 1975 states and 6906 transitions. [2021-03-11 00:15:09,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:15:09,448 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:15:09,448 INFO L519 BasicCegarLoop]: trace histogram [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] [2021-03-11 00:15:09,648 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-03-11 00:15:09,648 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:15:09,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:15:09,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1538778290, now seen corresponding path program 20 times [2021-03-11 00:15:09,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:15:09,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281476818] [2021-03-11 00:15:09,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:15:09,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:15:09,700 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:15:09,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281476818] [2021-03-11 00:15:09,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80070479] [2021-03-11 00:15:09,701 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 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 [2021-03-11 00:15:09,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:15:09,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:15:09,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:15:09,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:15:09,875 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:15:09,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:15:09,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-03-11 00:15:09,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032629535] [2021-03-11 00:15:09,876 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-11 00:15:09,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:15:09,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-11 00:15:09,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:15:09,877 INFO L87 Difference]: Start difference. First operand 1975 states and 6906 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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) [2021-03-11 00:15:11,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:15:11,027 INFO L93 Difference]: Finished difference Result 5943 states and 18242 transitions. [2021-03-11 00:15:11,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-03-11 00:15:11,028 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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 30 [2021-03-11 00:15:11,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:15:11,053 INFO L225 Difference]: With dead ends: 5943 [2021-03-11 00:15:11,053 INFO L226 Difference]: Without dead ends: 5943 [2021-03-11 00:15:11,056 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1751 ImplicationChecksByTransitivity, 763.8ms TimeCoverageRelationStatistics Valid=978, Invalid=3714, Unknown=0, NotChecked=0, Total=4692 [2021-03-11 00:15:11,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5943 states. [2021-03-11 00:15:11,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5943 to 1883. [2021-03-11 00:15:11,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1883 states, 1882 states have (on average 3.524973432518597) internal successors, (6634), 1882 states have internal predecessors, (6634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:11,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1883 states to 1883 states and 6634 transitions. [2021-03-11 00:15:11,113 INFO L78 Accepts]: Start accepts. Automaton has 1883 states and 6634 transitions. Word has length 30 [2021-03-11 00:15:11,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:15:11,113 INFO L480 AbstractCegarLoop]: Abstraction has 1883 states and 6634 transitions. [2021-03-11 00:15:11,113 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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) [2021-03-11 00:15:11,113 INFO L276 IsEmpty]: Start isEmpty. Operand 1883 states and 6634 transitions. [2021-03-11 00:15:11,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:15:11,116 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:15:11,116 INFO L519 BasicCegarLoop]: trace histogram [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] [2021-03-11 00:15:11,316 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-03-11 00:15:11,317 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:15:11,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:15:11,317 INFO L82 PathProgramCache]: Analyzing trace with hash 729705298, now seen corresponding path program 21 times [2021-03-11 00:15:11,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:15:11,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771696536] [2021-03-11 00:15:11,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:15:11,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:15:11,374 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:15:11,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771696536] [2021-03-11 00:15:11,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151204202] [2021-03-11 00:15:11,375 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 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 [2021-03-11 00:15:11,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-11 00:15:11,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:15:11,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:15:11,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:15:11,489 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:15:11,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:15:11,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-03-11 00:15:11,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897861534] [2021-03-11 00:15:11,490 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-11 00:15:11,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:15:11,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-11 00:15:11,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:15:11,491 INFO L87 Difference]: Start difference. First operand 1883 states and 6634 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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) [2021-03-11 00:15:12,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:15:12,452 INFO L93 Difference]: Finished difference Result 5285 states and 16489 transitions. [2021-03-11 00:15:12,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-03-11 00:15:12,453 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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 [2021-03-11 00:15:12,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:15:12,462 INFO L225 Difference]: With dead ends: 5285 [2021-03-11 00:15:12,463 INFO L226 Difference]: Without dead ends: 5197 [2021-03-11 00:15:12,463 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1124 ImplicationChecksByTransitivity, 621.0ms TimeCoverageRelationStatistics Valid=722, Invalid=2818, Unknown=0, NotChecked=0, Total=3540 [2021-03-11 00:15:12,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5197 states. [2021-03-11 00:15:12,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5197 to 1921. [2021-03-11 00:15:12,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1921 states, 1920 states have (on average 3.5078125) internal successors, (6735), 1920 states have internal predecessors, (6735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:12,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1921 states to 1921 states and 6735 transitions. [2021-03-11 00:15:12,522 INFO L78 Accepts]: Start accepts. Automaton has 1921 states and 6735 transitions. Word has length 30 [2021-03-11 00:15:12,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:15:12,522 INFO L480 AbstractCegarLoop]: Abstraction has 1921 states and 6735 transitions. [2021-03-11 00:15:12,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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) [2021-03-11 00:15:12,522 INFO L276 IsEmpty]: Start isEmpty. Operand 1921 states and 6735 transitions. [2021-03-11 00:15:12,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:15:12,526 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:15:12,526 INFO L519 BasicCegarLoop]: trace histogram [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] [2021-03-11 00:15:12,726 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-03-11 00:15:12,726 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:15:12,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:15:12,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1432234710, now seen corresponding path program 22 times [2021-03-11 00:15:12,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:15:12,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122479108] [2021-03-11 00:15:12,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:15:12,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:15:12,798 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:15:12,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122479108] [2021-03-11 00:15:12,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102241845] [2021-03-11 00:15:12,799 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 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 [2021-03-11 00:15:12,817 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:15:12,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:15:12,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:15:12,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:15:12,909 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:15:12,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:15:12,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-03-11 00:15:12,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749880688] [2021-03-11 00:15:12,909 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-11 00:15:12,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:15:12,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-11 00:15:12,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:15:12,910 INFO L87 Difference]: Start difference. First operand 1921 states and 6735 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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) [2021-03-11 00:15:14,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:15:14,003 INFO L93 Difference]: Finished difference Result 5368 states and 16837 transitions. [2021-03-11 00:15:14,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-03-11 00:15:14,003 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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 [2021-03-11 00:15:14,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:15:14,014 INFO L225 Difference]: With dead ends: 5368 [2021-03-11 00:15:14,016 INFO L226 Difference]: Without dead ends: 5320 [2021-03-11 00:15:14,017 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1340 ImplicationChecksByTransitivity, 711.9ms TimeCoverageRelationStatistics Valid=814, Invalid=3218, Unknown=0, NotChecked=0, Total=4032 [2021-03-11 00:15:14,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5320 states. [2021-03-11 00:15:14,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5320 to 2167. [2021-03-11 00:15:14,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2167 states, 2166 states have (on average 3.4247460757156047) internal successors, (7418), 2166 states have internal predecessors, (7418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:14,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2167 states to 2167 states and 7418 transitions. [2021-03-11 00:15:14,103 INFO L78 Accepts]: Start accepts. Automaton has 2167 states and 7418 transitions. Word has length 30 [2021-03-11 00:15:14,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:15:14,103 INFO L480 AbstractCegarLoop]: Abstraction has 2167 states and 7418 transitions. [2021-03-11 00:15:14,104 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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) [2021-03-11 00:15:14,104 INFO L276 IsEmpty]: Start isEmpty. Operand 2167 states and 7418 transitions. [2021-03-11 00:15:14,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:15:14,109 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:15:14,109 INFO L519 BasicCegarLoop]: trace histogram [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] [2021-03-11 00:15:14,323 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-03-11 00:15:14,323 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:15:14,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:15:14,323 INFO L82 PathProgramCache]: Analyzing trace with hash -2092961066, now seen corresponding path program 23 times [2021-03-11 00:15:14,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:15:14,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382781436] [2021-03-11 00:15:14,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:15:14,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:15:14,380 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:15:14,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382781436] [2021-03-11 00:15:14,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886813098] [2021-03-11 00:15:14,381 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:15:14,420 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-11 00:15:14,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:15:14,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:15:14,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:15:14,543 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:15:14,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:15:14,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-03-11 00:15:14,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359412283] [2021-03-11 00:15:14,544 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-11 00:15:14,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:15:14,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-11 00:15:14,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:15:14,544 INFO L87 Difference]: Start difference. First operand 2167 states and 7418 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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) [2021-03-11 00:15:15,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:15:15,841 INFO L93 Difference]: Finished difference Result 6070 states and 18667 transitions. [2021-03-11 00:15:15,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-03-11 00:15:15,842 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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 [2021-03-11 00:15:15,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:15:15,852 INFO L225 Difference]: With dead ends: 6070 [2021-03-11 00:15:15,852 INFO L226 Difference]: Without dead ends: 6058 [2021-03-11 00:15:15,853 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1865 ImplicationChecksByTransitivity, 841.8ms TimeCoverageRelationStatistics Valid=1035, Invalid=4221, Unknown=0, NotChecked=0, Total=5256 [2021-03-11 00:15:15,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6058 states. [2021-03-11 00:15:15,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6058 to 2443. [2021-03-11 00:15:15,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2443 states, 2442 states have (on average 3.3562653562653564) internal successors, (8196), 2442 states have internal predecessors, (8196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:15,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2443 states to 2443 states and 8196 transitions. [2021-03-11 00:15:15,957 INFO L78 Accepts]: Start accepts. Automaton has 2443 states and 8196 transitions. Word has length 30 [2021-03-11 00:15:15,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:15:15,957 INFO L480 AbstractCegarLoop]: Abstraction has 2443 states and 8196 transitions. [2021-03-11 00:15:15,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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) [2021-03-11 00:15:15,958 INFO L276 IsEmpty]: Start isEmpty. Operand 2443 states and 8196 transitions. [2021-03-11 00:15:15,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:15:15,963 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:15:15,963 INFO L519 BasicCegarLoop]: trace histogram [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] [2021-03-11 00:15:16,187 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:15:16,187 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:15:16,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:15:16,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1822451374, now seen corresponding path program 24 times [2021-03-11 00:15:16,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:15:16,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951652248] [2021-03-11 00:15:16,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:15:16,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:15:16,248 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:15:16,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951652248] [2021-03-11 00:15:16,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433499407] [2021-03-11 00:15:16,249 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:15:16,284 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-11 00:15:16,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:15:16,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:15:16,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:15:16,402 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:15:16,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:15:16,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-03-11 00:15:16,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163922884] [2021-03-11 00:15:16,403 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-11 00:15:16,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:15:16,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-11 00:15:16,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:15:16,403 INFO L87 Difference]: Start difference. First operand 2443 states and 8196 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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) [2021-03-11 00:15:18,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:15:18,058 INFO L93 Difference]: Finished difference Result 6469 states and 19686 transitions. [2021-03-11 00:15:18,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-03-11 00:15:18,059 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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 [2021-03-11 00:15:18,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:15:18,072 INFO L225 Difference]: With dead ends: 6469 [2021-03-11 00:15:18,073 INFO L226 Difference]: Without dead ends: 6469 [2021-03-11 00:15:18,073 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2848 ImplicationChecksByTransitivity, 1110.2ms TimeCoverageRelationStatistics Valid=1421, Invalid=5889, Unknown=0, NotChecked=0, Total=7310 [2021-03-11 00:15:18,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6469 states. [2021-03-11 00:15:18,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6469 to 2281. [2021-03-11 00:15:18,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2281 states, 2280 states have (on average 3.395175438596491) internal successors, (7741), 2280 states have internal predecessors, (7741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:18,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2281 states to 2281 states and 7741 transitions. [2021-03-11 00:15:18,151 INFO L78 Accepts]: Start accepts. Automaton has 2281 states and 7741 transitions. Word has length 30 [2021-03-11 00:15:18,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:15:18,151 INFO L480 AbstractCegarLoop]: Abstraction has 2281 states and 7741 transitions. [2021-03-11 00:15:18,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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) [2021-03-11 00:15:18,151 INFO L276 IsEmpty]: Start isEmpty. Operand 2281 states and 7741 transitions. [2021-03-11 00:15:18,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-11 00:15:18,155 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:15:18,155 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:15:18,366 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:15:18,367 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:15:18,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:15:18,367 INFO L82 PathProgramCache]: Analyzing trace with hash -605801532, now seen corresponding path program 25 times [2021-03-11 00:15:18,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:15:18,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287491977] [2021-03-11 00:15:18,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:15:18,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:15:18,453 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:15:18,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287491977] [2021-03-11 00:15:18,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151501916] [2021-03-11 00:15:18,453 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 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 [2021-03-11 00:15:18,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:15:18,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-11 00:15:18,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:15:18,688 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:15:18,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:15:18,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-11 00:15:18,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548028156] [2021-03-11 00:15:18,689 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:15:18,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:15:18,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:15:18,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:15:18,689 INFO L87 Difference]: Start difference. First operand 2281 states and 7741 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:19,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:15:19,945 INFO L93 Difference]: Finished difference Result 9682 states and 31073 transitions. [2021-03-11 00:15:19,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-03-11 00:15:19,946 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-11 00:15:19,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:15:19,966 INFO L225 Difference]: With dead ends: 9682 [2021-03-11 00:15:19,966 INFO L226 Difference]: Without dead ends: 9682 [2021-03-11 00:15:19,967 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1286 ImplicationChecksByTransitivity, 771.4ms TimeCoverageRelationStatistics Valid=922, Invalid=2984, Unknown=0, NotChecked=0, Total=3906 [2021-03-11 00:15:19,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9682 states. [2021-03-11 00:15:20,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9682 to 2995. [2021-03-11 00:15:20,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2995 states, 2994 states have (on average 3.5848363393453573) internal successors, (10733), 2994 states have internal predecessors, (10733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:20,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2995 states to 2995 states and 10733 transitions. [2021-03-11 00:15:20,101 INFO L78 Accepts]: Start accepts. Automaton has 2995 states and 10733 transitions. Word has length 32 [2021-03-11 00:15:20,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:15:20,102 INFO L480 AbstractCegarLoop]: Abstraction has 2995 states and 10733 transitions. [2021-03-11 00:15:20,102 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:20,102 INFO L276 IsEmpty]: Start isEmpty. Operand 2995 states and 10733 transitions. [2021-03-11 00:15:20,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-11 00:15:20,109 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:15:20,109 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:15:20,317 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-03-11 00:15:20,317 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:15:20,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:15:20,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1297197704, now seen corresponding path program 17 times [2021-03-11 00:15:20,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:15:20,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190043859] [2021-03-11 00:15:20,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:15:20,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:15:20,393 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:15:20,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190043859] [2021-03-11 00:15:20,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050393239] [2021-03-11 00:15:20,393 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:15:20,426 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-11 00:15:20,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:15:20,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-11 00:15:20,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:15:20,594 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:15:20,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:15:20,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-11 00:15:20,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770746772] [2021-03-11 00:15:20,595 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:15:20,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:15:20,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:15:20,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:15:20,596 INFO L87 Difference]: Start difference. First operand 2995 states and 10733 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:21,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:15:21,977 INFO L93 Difference]: Finished difference Result 8824 states and 28026 transitions. [2021-03-11 00:15:21,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-03-11 00:15:21,978 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-11 00:15:21,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:15:21,997 INFO L225 Difference]: With dead ends: 8824 [2021-03-11 00:15:21,997 INFO L226 Difference]: Without dead ends: 8824 [2021-03-11 00:15:21,997 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 834.2ms TimeCoverageRelationStatistics Valid=918, Invalid=3114, Unknown=0, NotChecked=0, Total=4032 [2021-03-11 00:15:22,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8824 states. [2021-03-11 00:15:22,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8824 to 2986. [2021-03-11 00:15:22,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2986 states, 2985 states have (on average 3.5728643216080402) internal successors, (10665), 2985 states have internal predecessors, (10665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:22,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2986 states to 2986 states and 10665 transitions. [2021-03-11 00:15:22,109 INFO L78 Accepts]: Start accepts. Automaton has 2986 states and 10665 transitions. Word has length 32 [2021-03-11 00:15:22,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:15:22,109 INFO L480 AbstractCegarLoop]: Abstraction has 2986 states and 10665 transitions. [2021-03-11 00:15:22,109 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:22,109 INFO L276 IsEmpty]: Start isEmpty. Operand 2986 states and 10665 transitions. [2021-03-11 00:15:22,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-11 00:15:22,114 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:15:22,114 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:15:22,314 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:15:22,315 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:15:22,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:15:22,315 INFO L82 PathProgramCache]: Analyzing trace with hash 600098510, now seen corresponding path program 26 times [2021-03-11 00:15:22,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:15:22,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087487855] [2021-03-11 00:15:22,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:15:22,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:15:22,378 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:15:22,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087487855] [2021-03-11 00:15:22,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924971731] [2021-03-11 00:15:22,378 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 [2021-03-11 00:15:22,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:15:22,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:15:22,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:15:22,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:15:22,588 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:15:22,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:15:22,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-03-11 00:15:22,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383048712] [2021-03-11 00:15:22,588 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:15:22,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:15:22,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:15:22,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:15:22,589 INFO L87 Difference]: Start difference. First operand 2986 states and 10665 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:24,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:15:24,798 INFO L93 Difference]: Finished difference Result 8875 states and 28153 transitions. [2021-03-11 00:15:24,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-03-11 00:15:24,799 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-11 00:15:24,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:15:24,816 INFO L225 Difference]: With dead ends: 8875 [2021-03-11 00:15:24,816 INFO L226 Difference]: Without dead ends: 8867 [2021-03-11 00:15:24,817 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2807 ImplicationChecksByTransitivity, 1285.2ms TimeCoverageRelationStatistics Valid=1463, Invalid=6193, Unknown=0, NotChecked=0, Total=7656 [2021-03-11 00:15:24,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8867 states. [2021-03-11 00:15:24,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8867 to 3090. [2021-03-11 00:15:24,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3090 states, 3089 states have (on average 3.5995467788928455) internal successors, (11119), 3089 states have internal predecessors, (11119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:24,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3090 states to 3090 states and 11119 transitions. [2021-03-11 00:15:24,929 INFO L78 Accepts]: Start accepts. Automaton has 3090 states and 11119 transitions. Word has length 32 [2021-03-11 00:15:24,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:15:24,929 INFO L480 AbstractCegarLoop]: Abstraction has 3090 states and 11119 transitions. [2021-03-11 00:15:24,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:24,930 INFO L276 IsEmpty]: Start isEmpty. Operand 3090 states and 11119 transitions. [2021-03-11 00:15:24,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-11 00:15:24,935 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:15:24,935 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:15:25,135 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:15:25,135 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:15:25,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:15:25,136 INFO L82 PathProgramCache]: Analyzing trace with hash 2007937660, now seen corresponding path program 18 times [2021-03-11 00:15:25,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:15:25,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035483259] [2021-03-11 00:15:25,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:15:25,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:15:25,196 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:15:25,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035483259] [2021-03-11 00:15:25,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955051856] [2021-03-11 00:15:25,196 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 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 [2021-03-11 00:15:25,235 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-11 00:15:25,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:15:25,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:15:25,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:15:25,390 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:15:25,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:15:25,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-03-11 00:15:25,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727480363] [2021-03-11 00:15:25,390 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:15:25,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:15:25,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:15:25,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:15:25,391 INFO L87 Difference]: Start difference. First operand 3090 states and 11119 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:27,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:15:27,545 INFO L93 Difference]: Finished difference Result 8679 states and 27970 transitions. [2021-03-11 00:15:27,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-03-11 00:15:27,546 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-11 00:15:27,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:15:27,569 INFO L225 Difference]: With dead ends: 8679 [2021-03-11 00:15:27,570 INFO L226 Difference]: Without dead ends: 8679 [2021-03-11 00:15:27,571 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3112 ImplicationChecksByTransitivity, 1371.3ms TimeCoverageRelationStatistics Valid=1649, Invalid=7281, Unknown=0, NotChecked=0, Total=8930 [2021-03-11 00:15:27,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8679 states. [2021-03-11 00:15:27,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8679 to 3210. [2021-03-11 00:15:27,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3210 states, 3209 states have (on average 3.630414459333126) internal successors, (11650), 3209 states have internal predecessors, (11650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:27,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3210 states to 3210 states and 11650 transitions. [2021-03-11 00:15:27,692 INFO L78 Accepts]: Start accepts. Automaton has 3210 states and 11650 transitions. Word has length 32 [2021-03-11 00:15:27,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:15:27,693 INFO L480 AbstractCegarLoop]: Abstraction has 3210 states and 11650 transitions. [2021-03-11 00:15:27,693 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:27,693 INFO L276 IsEmpty]: Start isEmpty. Operand 3210 states and 11650 transitions. [2021-03-11 00:15:27,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-11 00:15:27,702 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:15:27,702 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:15:27,907 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-03-11 00:15:27,907 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:15:27,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:15:27,907 INFO L82 PathProgramCache]: Analyzing trace with hash -433008152, now seen corresponding path program 27 times [2021-03-11 00:15:27,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:15:27,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905309253] [2021-03-11 00:15:27,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:15:27,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:15:28,002 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:15:28,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905309253] [2021-03-11 00:15:28,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745108350] [2021-03-11 00:15:28,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:15:28,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-11 00:15:28,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:15:28,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-11 00:15:28,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:15:28,184 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:15:28,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:15:28,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-03-11 00:15:28,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284517584] [2021-03-11 00:15:28,185 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:15:28,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:15:28,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:15:28,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:15:28,185 INFO L87 Difference]: Start difference. First operand 3210 states and 11650 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:29,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:15:29,774 INFO L93 Difference]: Finished difference Result 9135 states and 29852 transitions. [2021-03-11 00:15:29,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-03-11 00:15:29,775 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have 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 [2021-03-11 00:15:29,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:15:29,796 INFO L225 Difference]: With dead ends: 9135 [2021-03-11 00:15:29,796 INFO L226 Difference]: Without dead ends: 9083 [2021-03-11 00:15:29,797 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1751 ImplicationChecksByTransitivity, 873.9ms TimeCoverageRelationStatistics Valid=1064, Invalid=3906, Unknown=0, NotChecked=0, Total=4970 [2021-03-11 00:15:29,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9083 states. [2021-03-11 00:15:29,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9083 to 3428. [2021-03-11 00:15:29,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3428 states, 3427 states have (on average 3.6778523489932886) internal successors, (12604), 3427 states have internal predecessors, (12604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:29,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3428 states to 3428 states and 12604 transitions. [2021-03-11 00:15:29,932 INFO L78 Accepts]: Start accepts. Automaton has 3428 states and 12604 transitions. Word has length 32 [2021-03-11 00:15:29,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:15:29,932 INFO L480 AbstractCegarLoop]: Abstraction has 3428 states and 12604 transitions. [2021-03-11 00:15:29,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:29,932 INFO L276 IsEmpty]: Start isEmpty. Operand 3428 states and 12604 transitions. [2021-03-11 00:15:29,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-11 00:15:29,938 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:15:29,939 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:15:30,139 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-03-11 00:15:30,139 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:15:30,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:15:30,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1654503192, now seen corresponding path program 28 times [2021-03-11 00:15:30,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:15:30,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411434664] [2021-03-11 00:15:30,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:15:30,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:15:30,206 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:15:30,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411434664] [2021-03-11 00:15:30,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958558659] [2021-03-11 00:15:30,206 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:15:30,226 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:15:30,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:15:30,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-11 00:15:30,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:15:30,367 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:15:30,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:15:30,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-03-11 00:15:30,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129379918] [2021-03-11 00:15:30,368 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:15:30,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:15:30,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:15:30,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:15:30,369 INFO L87 Difference]: Start difference. First operand 3428 states and 12604 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:31,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:15:31,343 INFO L93 Difference]: Finished difference Result 9077 states and 29720 transitions. [2021-03-11 00:15:31,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-03-11 00:15:31,344 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have 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 [2021-03-11 00:15:31,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:15:31,370 INFO L225 Difference]: With dead ends: 9077 [2021-03-11 00:15:31,370 INFO L226 Difference]: Without dead ends: 9077 [2021-03-11 00:15:31,371 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 512.3ms TimeCoverageRelationStatistics Valid=572, Invalid=1590, Unknown=0, NotChecked=0, Total=2162 [2021-03-11 00:15:31,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9077 states. [2021-03-11 00:15:31,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9077 to 3545. [2021-03-11 00:15:31,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3545 states, 3544 states have (on average 3.660270880361174) internal successors, (12972), 3544 states have internal predecessors, (12972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:31,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3545 states to 3545 states and 12972 transitions. [2021-03-11 00:15:31,578 INFO L78 Accepts]: Start accepts. Automaton has 3545 states and 12972 transitions. Word has length 32 [2021-03-11 00:15:31,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:15:31,578 INFO L480 AbstractCegarLoop]: Abstraction has 3545 states and 12972 transitions. [2021-03-11 00:15:31,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:31,578 INFO L276 IsEmpty]: Start isEmpty. Operand 3545 states and 12972 transitions. [2021-03-11 00:15:31,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-11 00:15:31,591 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:15:31,591 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:15:31,814 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-03-11 00:15:31,815 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:15:31,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:15:31,815 INFO L82 PathProgramCache]: Analyzing trace with hash 952838794, now seen corresponding path program 19 times [2021-03-11 00:15:31,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:15:31,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482658003] [2021-03-11 00:15:31,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:15:31,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:15:31,869 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-11 00:15:31,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482658003] [2021-03-11 00:15:31,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016257281] [2021-03-11 00:15:31,869 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 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 [2021-03-11 00:15:31,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:15:31,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:15:31,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:15:32,079 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:15:32,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:15:32,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-03-11 00:15:32,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579605315] [2021-03-11 00:15:32,080 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:15:32,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:15:32,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:15:32,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:15:32,081 INFO L87 Difference]: Start difference. First operand 3545 states and 12972 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:33,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:15:33,811 INFO L93 Difference]: Finished difference Result 8376 states and 28279 transitions. [2021-03-11 00:15:33,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-03-11 00:15:33,812 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have 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 [2021-03-11 00:15:33,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:15:33,831 INFO L225 Difference]: With dead ends: 8376 [2021-03-11 00:15:33,831 INFO L226 Difference]: Without dead ends: 8376 [2021-03-11 00:15:33,831 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1582 ImplicationChecksByTransitivity, 968.5ms TimeCoverageRelationStatistics Valid=870, Invalid=3822, Unknown=0, NotChecked=0, Total=4692 [2021-03-11 00:15:33,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8376 states. [2021-03-11 00:15:33,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8376 to 3543. [2021-03-11 00:15:33,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3543 states, 3542 states have (on average 3.6620553359683794) internal successors, (12971), 3542 states have internal predecessors, (12971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:33,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3543 states to 3543 states and 12971 transitions. [2021-03-11 00:15:33,955 INFO L78 Accepts]: Start accepts. Automaton has 3543 states and 12971 transitions. Word has length 32 [2021-03-11 00:15:33,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:15:33,955 INFO L480 AbstractCegarLoop]: Abstraction has 3543 states and 12971 transitions. [2021-03-11 00:15:33,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:33,955 INFO L276 IsEmpty]: Start isEmpty. Operand 3543 states and 12971 transitions. [2021-03-11 00:15:33,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-11 00:15:33,961 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:15:33,961 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:15:34,161 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:15:34,162 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:15:34,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:15:34,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1653605764, now seen corresponding path program 20 times [2021-03-11 00:15:34,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:15:34,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25182497] [2021-03-11 00:15:34,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:15:34,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:15:34,227 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:15:34,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25182497] [2021-03-11 00:15:34,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913089236] [2021-03-11 00:15:34,227 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 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 [2021-03-11 00:15:34,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:15:34,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:15:34,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:15:34,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:15:34,429 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-11 00:15:34,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:15:34,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-11 00:15:34,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029399973] [2021-03-11 00:15:34,430 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:15:34,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:15:34,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:15:34,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:15:34,430 INFO L87 Difference]: Start difference. First operand 3543 states and 12971 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:36,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:15:36,497 INFO L93 Difference]: Finished difference Result 9833 states and 31971 transitions. [2021-03-11 00:15:36,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-03-11 00:15:36,498 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-11 00:15:36,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:15:36,519 INFO L225 Difference]: With dead ends: 9833 [2021-03-11 00:15:36,519 INFO L226 Difference]: Without dead ends: 9833 [2021-03-11 00:15:36,520 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3611 ImplicationChecksByTransitivity, 1339.7ms TimeCoverageRelationStatistics Valid=2012, Invalid=7690, Unknown=0, NotChecked=0, Total=9702 [2021-03-11 00:15:36,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9833 states. [2021-03-11 00:15:36,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9833 to 3619. [2021-03-11 00:15:36,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3619 states, 3618 states have (on average 3.646489773355445) internal successors, (13193), 3618 states have internal predecessors, (13193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:36,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3619 states to 3619 states and 13193 transitions. [2021-03-11 00:15:36,641 INFO L78 Accepts]: Start accepts. Automaton has 3619 states and 13193 transitions. Word has length 32 [2021-03-11 00:15:36,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:15:36,641 INFO L480 AbstractCegarLoop]: Abstraction has 3619 states and 13193 transitions. [2021-03-11 00:15:36,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:36,641 INFO L276 IsEmpty]: Start isEmpty. Operand 3619 states and 13193 transitions. [2021-03-11 00:15:36,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-11 00:15:36,647 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:15:36,647 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:15:36,848 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-03-11 00:15:36,848 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:15:36,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:15:36,848 INFO L82 PathProgramCache]: Analyzing trace with hash 956690446, now seen corresponding path program 21 times [2021-03-11 00:15:36,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:15:36,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935627952] [2021-03-11 00:15:36,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:15:36,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:15:36,926 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:15:36,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935627952] [2021-03-11 00:15:36,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725791998] [2021-03-11 00:15:36,926 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 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 [2021-03-11 00:15:36,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-11 00:15:36,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:15:36,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-11 00:15:36,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:15:37,146 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:15:37,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:15:37,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-03-11 00:15:37,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875618626] [2021-03-11 00:15:37,147 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:15:37,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:15:37,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:15:37,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:15:37,148 INFO L87 Difference]: Start difference. First operand 3619 states and 13193 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:38,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:15:38,913 INFO L93 Difference]: Finished difference Result 9122 states and 30000 transitions. [2021-03-11 00:15:38,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-03-11 00:15:38,914 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-11 00:15:38,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:15:38,933 INFO L225 Difference]: With dead ends: 9122 [2021-03-11 00:15:38,933 INFO L226 Difference]: Without dead ends: 9078 [2021-03-11 00:15:38,933 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1936 ImplicationChecksByTransitivity, 1063.0ms TimeCoverageRelationStatistics Valid=1274, Invalid=4578, Unknown=0, NotChecked=0, Total=5852 [2021-03-11 00:15:38,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9078 states. [2021-03-11 00:15:39,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9078 to 3617. [2021-03-11 00:15:39,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3617 states, 3616 states have (on average 3.64712389380531) internal successors, (13188), 3616 states have internal predecessors, (13188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:39,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3617 states to 3617 states and 13188 transitions. [2021-03-11 00:15:39,053 INFO L78 Accepts]: Start accepts. Automaton has 3617 states and 13188 transitions. Word has length 32 [2021-03-11 00:15:39,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:15:39,053 INFO L480 AbstractCegarLoop]: Abstraction has 3617 states and 13188 transitions. [2021-03-11 00:15:39,053 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:39,053 INFO L276 IsEmpty]: Start isEmpty. Operand 3617 states and 13188 transitions. [2021-03-11 00:15:39,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-11 00:15:39,059 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:15:39,059 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:15:39,260 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:15:39,260 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:15:39,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:15:39,260 INFO L82 PathProgramCache]: Analyzing trace with hash 530340736, now seen corresponding path program 22 times [2021-03-11 00:15:39,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:15:39,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145618052] [2021-03-11 00:15:39,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:15:39,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:15:39,326 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:15:39,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145618052] [2021-03-11 00:15:39,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893957401] [2021-03-11 00:15:39,326 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 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 [2021-03-11 00:15:39,351 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:15:39,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:15:39,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-11 00:15:39,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:15:39,568 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:15:39,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:15:39,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-03-11 00:15:39,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932052766] [2021-03-11 00:15:39,569 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:15:39,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:15:39,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:15:39,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:15:39,569 INFO L87 Difference]: Start difference. First operand 3617 states and 13188 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:40,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:15:40,728 INFO L93 Difference]: Finished difference Result 12373 states and 41772 transitions. [2021-03-11 00:15:40,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-03-11 00:15:40,728 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-11 00:15:40,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:15:40,758 INFO L225 Difference]: With dead ends: 12373 [2021-03-11 00:15:40,758 INFO L226 Difference]: Without dead ends: 12373 [2021-03-11 00:15:40,758 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 699.8ms TimeCoverageRelationStatistics Valid=680, Invalid=1870, Unknown=0, NotChecked=0, Total=2550 [2021-03-11 00:15:40,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12373 states. [2021-03-11 00:15:40,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12373 to 3680. [2021-03-11 00:15:40,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3680 states, 3679 states have (on average 3.6610491981516717) internal successors, (13469), 3679 states have internal predecessors, (13469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:40,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3680 states to 3680 states and 13469 transitions. [2021-03-11 00:15:40,909 INFO L78 Accepts]: Start accepts. Automaton has 3680 states and 13469 transitions. Word has length 32 [2021-03-11 00:15:40,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:15:40,910 INFO L480 AbstractCegarLoop]: Abstraction has 3680 states and 13469 transitions. [2021-03-11 00:15:40,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:40,910 INFO L276 IsEmpty]: Start isEmpty. Operand 3680 states and 13469 transitions. [2021-03-11 00:15:40,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-11 00:15:40,916 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:15:40,916 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:15:41,116 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:15:41,116 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:15:41,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:15:41,117 INFO L82 PathProgramCache]: Analyzing trace with hash 839203592, now seen corresponding path program 23 times [2021-03-11 00:15:41,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:15:41,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633653608] [2021-03-11 00:15:41,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:15:41,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:15:41,193 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:15:41,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633653608] [2021-03-11 00:15:41,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098075926] [2021-03-11 00:15:41,193 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 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 [2021-03-11 00:15:41,215 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-11 00:15:41,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:15:41,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-11 00:15:41,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:15:41,390 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:15:41,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:15:41,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-03-11 00:15:41,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562876296] [2021-03-11 00:15:41,390 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:15:41,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:15:41,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:15:41,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:15:41,391 INFO L87 Difference]: Start difference. First operand 3680 states and 13469 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:42,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:15:42,649 INFO L93 Difference]: Finished difference Result 11569 states and 38849 transitions. [2021-03-11 00:15:42,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-03-11 00:15:42,650 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-11 00:15:42,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:15:42,676 INFO L225 Difference]: With dead ends: 11569 [2021-03-11 00:15:42,676 INFO L226 Difference]: Without dead ends: 11569 [2021-03-11 00:15:42,677 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 907 ImplicationChecksByTransitivity, 701.4ms TimeCoverageRelationStatistics Valid=691, Invalid=2171, Unknown=0, NotChecked=0, Total=2862 [2021-03-11 00:15:42,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11569 states. [2021-03-11 00:15:42,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11569 to 3687. [2021-03-11 00:15:42,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3687 states, 3686 states have (on average 3.6625067824199675) internal successors, (13500), 3686 states have internal predecessors, (13500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:42,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3687 states to 3687 states and 13500 transitions. [2021-03-11 00:15:42,821 INFO L78 Accepts]: Start accepts. Automaton has 3687 states and 13500 transitions. Word has length 32 [2021-03-11 00:15:42,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:15:42,821 INFO L480 AbstractCegarLoop]: Abstraction has 3687 states and 13500 transitions. [2021-03-11 00:15:42,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:42,821 INFO L276 IsEmpty]: Start isEmpty. Operand 3687 states and 13500 transitions. [2021-03-11 00:15:42,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-11 00:15:42,827 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:15:42,827 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:15:43,028 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-03-11 00:15:43,028 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:15:43,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:15:43,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1608999928, now seen corresponding path program 24 times [2021-03-11 00:15:43,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:15:43,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108150629] [2021-03-11 00:15:43,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:15:43,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:15:43,117 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:15:43,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108150629] [2021-03-11 00:15:43,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530482084] [2021-03-11 00:15:43,117 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-11 00:15:43,145 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-11 00:15:43,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:15:43,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:15:43,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:15:43,362 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-11 00:15:43,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:15:43,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-03-11 00:15:43,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080828402] [2021-03-11 00:15:43,363 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:15:43,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:15:43,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:15:43,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:15:43,363 INFO L87 Difference]: Start difference. First operand 3687 states and 13500 transitions. Second operand has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:46,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:15:46,362 INFO L93 Difference]: Finished difference Result 11049 states and 35399 transitions. [2021-03-11 00:15:46,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2021-03-11 00:15:46,362 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-11 00:15:46,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:15:46,387 INFO L225 Difference]: With dead ends: 11049 [2021-03-11 00:15:46,388 INFO L226 Difference]: Without dead ends: 11049 [2021-03-11 00:15:46,389 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5558 ImplicationChecksByTransitivity, 2047.5ms TimeCoverageRelationStatistics Valid=2969, Invalid=11073, Unknown=0, NotChecked=0, Total=14042 [2021-03-11 00:15:46,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11049 states. [2021-03-11 00:15:46,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11049 to 3769. [2021-03-11 00:15:46,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3769 states, 3768 states have (on average 3.6520700636942673) internal successors, (13761), 3768 states have internal predecessors, (13761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:46,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3769 states to 3769 states and 13761 transitions. [2021-03-11 00:15:46,538 INFO L78 Accepts]: Start accepts. Automaton has 3769 states and 13761 transitions. Word has length 32 [2021-03-11 00:15:46,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:15:46,538 INFO L480 AbstractCegarLoop]: Abstraction has 3769 states and 13761 transitions. [2021-03-11 00:15:46,538 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:46,539 INFO L276 IsEmpty]: Start isEmpty. Operand 3769 states and 13761 transitions. [2021-03-11 00:15:46,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-11 00:15:46,545 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:15:46,545 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:15:46,745 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:15:46,745 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:15:46,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:15:46,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1001296282, now seen corresponding path program 25 times [2021-03-11 00:15:46,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:15:46,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271644222] [2021-03-11 00:15:46,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:15:46,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:15:46,840 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:15:46,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271644222] [2021-03-11 00:15:46,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442507718] [2021-03-11 00:15:46,841 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-11 00:15:46,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:15:46,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:15:46,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:15:47,064 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-11 00:15:47,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:15:47,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-03-11 00:15:47,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362310658] [2021-03-11 00:15:47,065 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:15:47,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:15:47,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:15:47,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:15:47,066 INFO L87 Difference]: Start difference. First operand 3769 states and 13761 transitions. Second operand has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:49,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:15:49,449 INFO L93 Difference]: Finished difference Result 10568 states and 33987 transitions. [2021-03-11 00:15:49,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-03-11 00:15:49,450 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-11 00:15:49,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:15:49,475 INFO L225 Difference]: With dead ends: 10568 [2021-03-11 00:15:49,475 INFO L226 Difference]: Without dead ends: 10528 [2021-03-11 00:15:49,476 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3329 ImplicationChecksByTransitivity, 1572.8ms TimeCoverageRelationStatistics Valid=2003, Invalid=7117, Unknown=0, NotChecked=0, Total=9120 [2021-03-11 00:15:49,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10528 states. [2021-03-11 00:15:49,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10528 to 3799. [2021-03-11 00:15:49,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3799 states, 3798 states have (on average 3.644023170089521) internal successors, (13840), 3798 states have internal predecessors, (13840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:49,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3799 states to 3799 states and 13840 transitions. [2021-03-11 00:15:49,602 INFO L78 Accepts]: Start accepts. Automaton has 3799 states and 13840 transitions. Word has length 32 [2021-03-11 00:15:49,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:15:49,602 INFO L480 AbstractCegarLoop]: Abstraction has 3799 states and 13840 transitions. [2021-03-11 00:15:49,602 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:49,602 INFO L276 IsEmpty]: Start isEmpty. Operand 3799 states and 13840 transitions. [2021-03-11 00:15:49,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-11 00:15:49,608 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:15:49,608 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:15:49,809 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-03-11 00:15:49,809 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:15:49,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:15:49,809 INFO L82 PathProgramCache]: Analyzing trace with hash 364829428, now seen corresponding path program 26 times [2021-03-11 00:15:49,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:15:49,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556053453] [2021-03-11 00:15:49,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:15:49,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:15:49,886 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:15:49,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556053453] [2021-03-11 00:15:49,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769625702] [2021-03-11 00:15:49,887 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 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 [2021-03-11 00:15:49,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:15:49,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:15:49,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:15:49,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:15:50,043 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-11 00:15:50,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:15:50,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-03-11 00:15:50,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557455371] [2021-03-11 00:15:50,044 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:15:50,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:15:50,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:15:50,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:15:50,045 INFO L87 Difference]: Start difference. First operand 3799 states and 13840 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:51,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:15:51,985 INFO L93 Difference]: Finished difference Result 9751 states and 31922 transitions. [2021-03-11 00:15:51,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-03-11 00:15:51,986 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-11 00:15:51,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:15:52,007 INFO L225 Difference]: With dead ends: 9751 [2021-03-11 00:15:52,007 INFO L226 Difference]: Without dead ends: 9703 [2021-03-11 00:15:52,008 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2176 ImplicationChecksByTransitivity, 1176.0ms TimeCoverageRelationStatistics Valid=1364, Invalid=5116, Unknown=0, NotChecked=0, Total=6480 [2021-03-11 00:15:52,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9703 states. [2021-03-11 00:15:52,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9703 to 3801. [2021-03-11 00:15:52,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3801 states, 3800 states have (on average 3.6444736842105265) internal successors, (13849), 3800 states have internal predecessors, (13849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:52,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3801 states to 3801 states and 13849 transitions. [2021-03-11 00:15:52,131 INFO L78 Accepts]: Start accepts. Automaton has 3801 states and 13849 transitions. Word has length 32 [2021-03-11 00:15:52,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:15:52,132 INFO L480 AbstractCegarLoop]: Abstraction has 3801 states and 13849 transitions. [2021-03-11 00:15:52,132 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:52,132 INFO L276 IsEmpty]: Start isEmpty. Operand 3801 states and 13849 transitions. [2021-03-11 00:15:52,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-11 00:15:52,138 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:15:52,138 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:15:52,339 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-03-11 00:15:52,339 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:15:52,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:15:52,339 INFO L82 PathProgramCache]: Analyzing trace with hash 878521864, now seen corresponding path program 27 times [2021-03-11 00:15:52,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:15:52,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780613958] [2021-03-11 00:15:52,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:15:52,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:15:52,413 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:15:52,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780613958] [2021-03-11 00:15:52,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208472790] [2021-03-11 00:15:52,413 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 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 [2021-03-11 00:15:52,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-11 00:15:52,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:15:52,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-11 00:15:52,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:15:52,674 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:15:52,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:15:52,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-03-11 00:15:52,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263562886] [2021-03-11 00:15:52,675 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:15:52,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:15:52,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:15:52,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:15:52,676 INFO L87 Difference]: Start difference. First operand 3801 states and 13849 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:53,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:15:53,779 INFO L93 Difference]: Finished difference Result 14063 states and 48419 transitions. [2021-03-11 00:15:53,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-03-11 00:15:53,780 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-11 00:15:53,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:15:53,816 INFO L225 Difference]: With dead ends: 14063 [2021-03-11 00:15:53,816 INFO L226 Difference]: Without dead ends: 14063 [2021-03-11 00:15:53,816 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 602.6ms TimeCoverageRelationStatistics Valid=444, Invalid=1116, Unknown=0, NotChecked=0, Total=1560 [2021-03-11 00:15:53,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14063 states. [2021-03-11 00:15:53,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14063 to 4679. [2021-03-11 00:15:53,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4679 states, 4678 states have (on average 3.8020521590423257) internal successors, (17786), 4678 states have internal predecessors, (17786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:53,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4679 states to 4679 states and 17786 transitions. [2021-03-11 00:15:53,995 INFO L78 Accepts]: Start accepts. Automaton has 4679 states and 17786 transitions. Word has length 32 [2021-03-11 00:15:53,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:15:53,995 INFO L480 AbstractCegarLoop]: Abstraction has 4679 states and 17786 transitions. [2021-03-11 00:15:53,995 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:53,995 INFO L276 IsEmpty]: Start isEmpty. Operand 4679 states and 17786 transitions. [2021-03-11 00:15:54,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-11 00:15:54,003 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:15:54,003 INFO L519 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] [2021-03-11 00:15:54,203 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:15:54,203 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:15:54,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:15:54,204 INFO L82 PathProgramCache]: Analyzing trace with hash 313112068, now seen corresponding path program 29 times [2021-03-11 00:15:54,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:15:54,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210493926] [2021-03-11 00:15:54,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:15:54,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:15:54,672 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2021-03-11 00:15:54,898 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:15:54,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210493926] [2021-03-11 00:15:54,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558707352] [2021-03-11 00:15:54,898 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-11 00:15:54,922 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-11 00:15:54,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:15:54,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-11 00:15:54,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:15:55,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-03-11 00:15:55,077 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:15:55,088 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:15:55,089 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:15:55,089 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-03-11 00:15:55,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:55,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2021-03-11 00:15:55,140 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:15:55,154 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:15:55,155 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:15:55,155 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:40 [2021-03-11 00:15:55,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:55,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:55,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:55,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 36 [2021-03-11 00:15:55,209 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:15:55,225 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:15:55,227 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:15:55,227 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:47 [2021-03-11 00:15:55,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:55,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:55,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:55,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 41 [2021-03-11 00:15:55,409 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:15:55,424 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:15:55,426 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-11 00:15:55,427 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:55, output treesize:47 [2021-03-11 00:15:55,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:55,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:55,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:55,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:55,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:15:55,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 39 [2021-03-11 00:15:55,595 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:15:55,616 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:15:55,623 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-11 00:15:55,623 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:57, output treesize:45 [2021-03-11 00:15:55,774 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:15:55,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:15:55,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-03-11 00:15:55,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966334325] [2021-03-11 00:15:55,775 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-11 00:15:55,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:15:55,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-11 00:15:55,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-03-11 00:15:55,776 INFO L87 Difference]: Start difference. First operand 4679 states and 17786 transitions. Second operand has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:56,322 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2021-03-11 00:15:56,937 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 39 [2021-03-11 00:15:57,363 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 45 [2021-03-11 00:15:57,893 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 54 [2021-03-11 00:15:58,056 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2021-03-11 00:15:58,691 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2021-03-11 00:16:01,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:16:01,565 INFO L93 Difference]: Finished difference Result 8092 states and 28492 transitions. [2021-03-11 00:16:01,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-03-11 00:16:01,565 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-11 00:16:01,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:16:01,582 INFO L225 Difference]: With dead ends: 8092 [2021-03-11 00:16:01,582 INFO L226 Difference]: Without dead ends: 7481 [2021-03-11 00:16:01,582 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1995 ImplicationChecksByTransitivity, 5034.7ms TimeCoverageRelationStatistics Valid=779, Invalid=5227, Unknown=0, NotChecked=0, Total=6006 [2021-03-11 00:16:01,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7481 states. [2021-03-11 00:16:01,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7481 to 5073. [2021-03-11 00:16:01,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5073 states, 5072 states have (on average 3.789826498422713) internal successors, (19222), 5072 states have internal predecessors, (19222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:16:01,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5073 states to 5073 states and 19222 transitions. [2021-03-11 00:16:01,725 INFO L78 Accepts]: Start accepts. Automaton has 5073 states and 19222 transitions. Word has length 32 [2021-03-11 00:16:01,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:16:01,726 INFO L480 AbstractCegarLoop]: Abstraction has 5073 states and 19222 transitions. [2021-03-11 00:16:01,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:16:01,726 INFO L276 IsEmpty]: Start isEmpty. Operand 5073 states and 19222 transitions. [2021-03-11 00:16:01,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-11 00:16:01,734 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:16:01,734 INFO L519 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] [2021-03-11 00:16:01,935 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-03-11 00:16:01,935 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:16:01,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:16:01,935 INFO L82 PathProgramCache]: Analyzing trace with hash -500654400, now seen corresponding path program 30 times [2021-03-11 00:16:01,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:16:01,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093049170] [2021-03-11 00:16:01,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:16:01,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:16:02,433 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2021-03-11 00:16:02,606 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:16:02,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093049170] [2021-03-11 00:16:02,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089648664] [2021-03-11 00:16:02,606 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 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 [2021-03-11 00:16:02,628 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-11 00:16:02,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:16:02,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-11 00:16:02,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:16:02,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-11 00:16:02,764 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:02,778 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:16:02,780 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-11 00:16:02,781 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:30 [2021-03-11 00:16:02,861 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-03-11 00:16:02,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-03-11 00:16:02,863 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:02,882 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:16:02,889 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-11 00:16:02,890 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:42 [2021-03-11 00:16:03,013 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-03-11 00:16:03,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2021-03-11 00:16:03,015 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:03,039 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:16:03,046 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-03-11 00:16:03,046 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:55, output treesize:54 [2021-03-11 00:16:03,259 INFO L354 Elim1Store]: treesize reduction 72, result has 18.2 percent of original size [2021-03-11 00:16:03,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 38 [2021-03-11 00:16:03,261 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:03,304 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:16:03,312 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-03-11 00:16:03,312 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:70, output treesize:69 [2021-03-11 00:16:03,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:03,791 INFO L354 Elim1Store]: treesize reduction 104, result has 16.8 percent of original size [2021-03-11 00:16:03,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 37 treesize of output 48 [2021-03-11 00:16:03,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:03,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:16:03,842 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2021-03-11 00:16:03,842 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:76, output treesize:75 [2021-03-11 00:16:04,157 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:16:04,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:16:04,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2021-03-11 00:16:04,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104553283] [2021-03-11 00:16:04,158 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-11 00:16:04,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:16:04,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-11 00:16:04,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=625, Unknown=0, NotChecked=0, Total=756 [2021-03-11 00:16:04,158 INFO L87 Difference]: Start difference. First operand 5073 states and 19222 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:16:04,813 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 42 [2021-03-11 00:16:06,550 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 45 [2021-03-11 00:16:07,901 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2021-03-11 00:16:09,094 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 64 [2021-03-11 00:16:09,270 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 50 [2021-03-11 00:16:09,470 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 59 [2021-03-11 00:16:10,811 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2021-03-11 00:16:11,045 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2021-03-11 00:16:12,377 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2021-03-11 00:16:14,104 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2021-03-11 00:16:15,815 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2021-03-11 00:16:20,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:16:20,853 INFO L93 Difference]: Finished difference Result 9505 states and 33563 transitions. [2021-03-11 00:16:20,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-03-11 00:16:20,855 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-11 00:16:20,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:16:20,876 INFO L225 Difference]: With dead ends: 9505 [2021-03-11 00:16:20,876 INFO L226 Difference]: Without dead ends: 8978 [2021-03-11 00:16:20,877 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2735 ImplicationChecksByTransitivity, 10682.4ms TimeCoverageRelationStatistics Valid=1287, Invalid=6369, Unknown=0, NotChecked=0, Total=7656 [2021-03-11 00:16:20,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8978 states. [2021-03-11 00:16:21,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8978 to 6235. [2021-03-11 00:16:21,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6235 states, 6234 states have (on average 3.693294834777029) internal successors, (23024), 6234 states have internal predecessors, (23024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:16:21,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6235 states to 6235 states and 23024 transitions. [2021-03-11 00:16:21,090 INFO L78 Accepts]: Start accepts. Automaton has 6235 states and 23024 transitions. Word has length 32 [2021-03-11 00:16:21,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:16:21,090 INFO L480 AbstractCegarLoop]: Abstraction has 6235 states and 23024 transitions. [2021-03-11 00:16:21,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:16:21,090 INFO L276 IsEmpty]: Start isEmpty. Operand 6235 states and 23024 transitions. [2021-03-11 00:16:21,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-11 00:16:21,103 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:16:21,103 INFO L519 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] [2021-03-11 00:16:21,315 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:16:21,315 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:16:21,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:16:21,316 INFO L82 PathProgramCache]: Analyzing trace with hash 457173692, now seen corresponding path program 31 times [2021-03-11 00:16:21,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:16:21,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226485804] [2021-03-11 00:16:21,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:16:21,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:16:21,735 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2021-03-11 00:16:21,907 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-03-11 00:16:22,072 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2021-03-11 00:16:22,365 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:16:22,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226485804] [2021-03-11 00:16:22,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188189226] [2021-03-11 00:16:22,366 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:16:22,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:16:22,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-11 00:16:22,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:16:22,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-11 00:16:22,655 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:22,675 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:16:22,678 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-11 00:16:22,678 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:30 [2021-03-11 00:16:22,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:22,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-03-11 00:16:22,779 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:22,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:16:22,809 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-11 00:16:22,809 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:37 [2021-03-11 00:16:22,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:22,932 INFO L354 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2021-03-11 00:16:22,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2021-03-11 00:16:22,934 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:22,954 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:16:22,960 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-03-11 00:16:22,960 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:45, output treesize:44 [2021-03-11 00:16:23,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:23,074 INFO L354 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2021-03-11 00:16:23,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2021-03-11 00:16:23,076 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:23,097 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:16:23,104 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-03-11 00:16:23,104 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:50, output treesize:49 [2021-03-11 00:16:23,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:23,360 INFO L354 Elim1Store]: treesize reduction 64, result has 20.0 percent of original size [2021-03-11 00:16:23,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 38 [2021-03-11 00:16:23,363 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:23,389 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:16:23,399 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-03-11 00:16:23,399 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:59, output treesize:58 [2021-03-11 00:16:23,746 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:16:23,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:16:23,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-03-11 00:16:23,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774969999] [2021-03-11 00:16:23,747 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-11 00:16:23,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:16:23,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-11 00:16:23,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2021-03-11 00:16:23,748 INFO L87 Difference]: Start difference. First operand 6235 states and 23024 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:16:24,405 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 65 [2021-03-11 00:16:24,670 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 40 [2021-03-11 00:16:24,897 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2021-03-11 00:16:25,215 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 65 [2021-03-11 00:16:25,641 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 70 [2021-03-11 00:16:25,832 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2021-03-11 00:16:26,160 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 38 [2021-03-11 00:16:26,649 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 70 [2021-03-11 00:16:26,908 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 68 [2021-03-11 00:16:27,169 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 71 [2021-03-11 00:16:27,439 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 49 [2021-03-11 00:16:27,642 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 45 [2021-03-11 00:16:28,121 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2021-03-11 00:16:28,451 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 70 [2021-03-11 00:16:28,766 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 42 [2021-03-11 00:16:28,917 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2021-03-11 00:16:29,145 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2021-03-11 00:16:29,480 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 54 [2021-03-11 00:16:29,851 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2021-03-11 00:16:30,149 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 72 [2021-03-11 00:16:30,654 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 54 [2021-03-11 00:16:31,081 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 72 [2021-03-11 00:16:31,413 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2021-03-11 00:16:32,020 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2021-03-11 00:16:32,352 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 75 [2021-03-11 00:16:32,818 WARN L205 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 75 [2021-03-11 00:16:33,367 WARN L205 SmtUtils]: Spent 435.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 77 [2021-03-11 00:16:33,954 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 77 [2021-03-11 00:16:34,441 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 78 [2021-03-11 00:16:34,979 WARN L205 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 80 [2021-03-11 00:16:35,440 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 79 [2021-03-11 00:16:35,782 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2021-03-11 00:16:36,098 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2021-03-11 00:16:37,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:16:37,210 INFO L93 Difference]: Finished difference Result 9461 states and 33539 transitions. [2021-03-11 00:16:37,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-03-11 00:16:37,216 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-11 00:16:37,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:16:37,237 INFO L225 Difference]: With dead ends: 9461 [2021-03-11 00:16:37,237 INFO L226 Difference]: Without dead ends: 9330 [2021-03-11 00:16:37,238 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1561 ImplicationChecksByTransitivity, 10959.2ms TimeCoverageRelationStatistics Valid=771, Invalid=4485, Unknown=0, NotChecked=0, Total=5256 [2021-03-11 00:16:37,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9330 states. [2021-03-11 00:16:37,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9330 to 7112. [2021-03-11 00:16:37,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7112 states, 7111 states have (on average 3.676135564618197) internal successors, (26141), 7111 states have internal predecessors, (26141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:16:37,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7112 states to 7112 states and 26141 transitions. [2021-03-11 00:16:37,406 INFO L78 Accepts]: Start accepts. Automaton has 7112 states and 26141 transitions. Word has length 32 [2021-03-11 00:16:37,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:16:37,406 INFO L480 AbstractCegarLoop]: Abstraction has 7112 states and 26141 transitions. [2021-03-11 00:16:37,406 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:16:37,407 INFO L276 IsEmpty]: Start isEmpty. Operand 7112 states and 26141 transitions. [2021-03-11 00:16:37,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-11 00:16:37,421 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:16:37,421 INFO L519 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] [2021-03-11 00:16:37,635 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-03-11 00:16:37,635 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:16:37,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:16:37,635 INFO L82 PathProgramCache]: Analyzing trace with hash 737661248, now seen corresponding path program 32 times [2021-03-11 00:16:37,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:16:37,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742079491] [2021-03-11 00:16:37,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:16:37,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:16:38,121 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2021-03-11 00:16:38,301 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-03-11 00:16:38,566 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:16:38,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742079491] [2021-03-11 00:16:38,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421784591] [2021-03-11 00:16:38,567 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:16:38,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:16:38,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:16:38,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-11 00:16:38,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:16:38,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-03-11 00:16:38,821 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:38,835 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:16:38,837 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:16:38,837 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:30 [2021-03-11 00:16:38,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:38,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-03-11 00:16:38,905 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:38,923 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:16:38,925 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:16:38,925 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:39 [2021-03-11 00:16:39,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:39,028 INFO L354 Elim1Store]: treesize reduction 38, result has 25.5 percent of original size [2021-03-11 00:16:39,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 32 [2021-03-11 00:16:39,031 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:39,055 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:16:39,058 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-11 00:16:39,058 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:51 [2021-03-11 00:16:39,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:39,255 INFO L354 Elim1Store]: treesize reduction 35, result has 12.5 percent of original size [2021-03-11 00:16:39,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 37 [2021-03-11 00:16:39,258 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:39,282 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:16:39,288 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-11 00:16:39,288 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:51 [2021-03-11 00:16:39,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:39,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:39,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:39,474 INFO L354 Elim1Store]: treesize reduction 35, result has 12.5 percent of original size [2021-03-11 00:16:39,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 42 [2021-03-11 00:16:39,477 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:39,506 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:16:39,515 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-03-11 00:16:39,515 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:59, output treesize:58 [2021-03-11 00:16:39,958 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:16:39,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:16:39,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-03-11 00:16:39,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530056495] [2021-03-11 00:16:39,959 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-11 00:16:39,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:16:39,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-11 00:16:39,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2021-03-11 00:16:39,959 INFO L87 Difference]: Start difference. First operand 7112 states and 26141 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:16:40,443 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2021-03-11 00:16:40,851 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2021-03-11 00:16:41,021 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 30 [2021-03-11 00:16:41,897 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-03-11 00:16:42,130 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 35 [2021-03-11 00:16:43,500 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 38 [2021-03-11 00:16:43,659 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 34 [2021-03-11 00:16:44,047 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-03-11 00:16:44,267 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-03-11 00:16:45,027 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 47 [2021-03-11 00:16:45,617 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 62 [2021-03-11 00:16:45,977 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 66 [2021-03-11 00:16:46,276 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 51 [2021-03-11 00:16:47,314 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2021-03-11 00:16:47,721 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 62 [2021-03-11 00:16:48,236 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 70 [2021-03-11 00:16:48,922 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 66 [2021-03-11 00:16:49,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:16:49,074 INFO L93 Difference]: Finished difference Result 11524 states and 39694 transitions. [2021-03-11 00:16:49,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-03-11 00:16:49,076 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-11 00:16:49,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:16:49,102 INFO L225 Difference]: With dead ends: 11524 [2021-03-11 00:16:49,103 INFO L226 Difference]: Without dead ends: 11161 [2021-03-11 00:16:49,103 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1458 ImplicationChecksByTransitivity, 7704.4ms TimeCoverageRelationStatistics Valid=836, Invalid=4134, Unknown=0, NotChecked=0, Total=4970 [2021-03-11 00:16:49,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11161 states. [2021-03-11 00:16:49,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11161 to 7436. [2021-03-11 00:16:49,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7436 states, 7435 states have (on average 3.662138533960995) internal successors, (27228), 7435 states have internal predecessors, (27228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:16:49,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7436 states to 7436 states and 27228 transitions. [2021-03-11 00:16:49,321 INFO L78 Accepts]: Start accepts. Automaton has 7436 states and 27228 transitions. Word has length 32 [2021-03-11 00:16:49,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:16:49,321 INFO L480 AbstractCegarLoop]: Abstraction has 7436 states and 27228 transitions. [2021-03-11 00:16:49,322 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:16:49,322 INFO L276 IsEmpty]: Start isEmpty. Operand 7436 states and 27228 transitions. [2021-03-11 00:16:49,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-11 00:16:49,335 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:16:49,335 INFO L519 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] [2021-03-11 00:16:49,535 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:16:49,536 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:16:49,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:16:49,536 INFO L82 PathProgramCache]: Analyzing trace with hash 372642824, now seen corresponding path program 33 times [2021-03-11 00:16:49,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:16:49,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630282145] [2021-03-11 00:16:49,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:16:49,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:16:49,751 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-03-11 00:16:49,879 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-03-11 00:16:50,042 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-03-11 00:16:50,243 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2021-03-11 00:16:50,421 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-03-11 00:16:50,882 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:16:50,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630282145] [2021-03-11 00:16:50,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795509866] [2021-03-11 00:16:50,883 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:16:50,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-11 00:16:50,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:16:50,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:16:50,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:16:51,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-03-11 00:16:51,143 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:51,160 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:16:51,162 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:16:51,162 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-03-11 00:16:51,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:51,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-03-11 00:16:51,248 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:51,267 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:16:51,268 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:16:51,268 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-03-11 00:16:51,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:51,451 INFO L354 Elim1Store]: treesize reduction 38, result has 25.5 percent of original size [2021-03-11 00:16:51,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 32 [2021-03-11 00:16:51,454 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:51,480 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:16:51,482 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-11 00:16:51,483 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:51 [2021-03-11 00:16:51,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:51,778 INFO L354 Elim1Store]: treesize reduction 72, result has 20.0 percent of original size [2021-03-11 00:16:51,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 42 [2021-03-11 00:16:51,781 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:51,816 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:16:51,820 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-11 00:16:51,820 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:64, output treesize:63 [2021-03-11 00:16:52,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:52,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:52,111 INFO L354 Elim1Store]: treesize reduction 41, result has 10.9 percent of original size [2021-03-11 00:16:52,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 43 [2021-03-11 00:16:52,115 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:52,153 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:16:52,158 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-11 00:16:52,158 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:70, output treesize:62 [2021-03-11 00:16:52,757 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:16:52,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:16:52,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 30 [2021-03-11 00:16:52,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269332607] [2021-03-11 00:16:52,758 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-11 00:16:52,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:16:52,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-11 00:16:52,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=753, Unknown=0, NotChecked=0, Total=870 [2021-03-11 00:16:52,758 INFO L87 Difference]: Start difference. First operand 7436 states and 27228 transitions. Second operand has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:16:53,270 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 24 [2021-03-11 00:16:53,793 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 72 [2021-03-11 00:16:54,165 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 35 [2021-03-11 00:16:54,475 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 34 [2021-03-11 00:16:54,687 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 42 [2021-03-11 00:16:54,917 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 37 [2021-03-11 00:16:55,100 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-03-11 00:16:55,649 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 74 [2021-03-11 00:16:55,946 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 59 [2021-03-11 00:16:56,584 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 69 [2021-03-11 00:16:56,905 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 63 [2021-03-11 00:16:57,222 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2021-03-11 00:16:57,750 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2021-03-11 00:16:58,139 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 59 [2021-03-11 00:16:58,605 WARN L205 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 55 [2021-03-11 00:16:58,816 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2021-03-11 00:16:59,022 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2021-03-11 00:16:59,798 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 50 [2021-03-11 00:17:00,504 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 49 [2021-03-11 00:17:00,863 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 58 [2021-03-11 00:17:01,166 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2021-03-11 00:17:01,497 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2021-03-11 00:17:01,761 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2021-03-11 00:17:02,322 WARN L205 SmtUtils]: Spent 430.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 68 [2021-03-11 00:17:02,567 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2021-03-11 00:17:02,991 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 47 [2021-03-11 00:17:03,385 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 68 [2021-03-11 00:17:03,746 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2021-03-11 00:17:04,274 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2021-03-11 00:17:05,602 WARN L205 SmtUtils]: Spent 526.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 85 [2021-03-11 00:17:06,583 WARN L205 SmtUtils]: Spent 487.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 82 [2021-03-11 00:17:06,937 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 69 [2021-03-11 00:17:07,333 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 59 [2021-03-11 00:17:07,999 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2021-03-11 00:17:08,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:17:08,264 INFO L93 Difference]: Finished difference Result 12806 states and 42708 transitions. [2021-03-11 00:17:08,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-03-11 00:17:08,265 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-11 00:17:08,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:17:08,296 INFO L225 Difference]: With dead ends: 12806 [2021-03-11 00:17:08,296 INFO L226 Difference]: Without dead ends: 12603 [2021-03-11 00:17:08,297 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2545 ImplicationChecksByTransitivity, 14055.7ms TimeCoverageRelationStatistics Valid=1266, Invalid=6744, Unknown=0, NotChecked=0, Total=8010 [2021-03-11 00:17:08,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12603 states. [2021-03-11 00:17:08,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12603 to 7670. [2021-03-11 00:17:08,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7670 states, 7669 states have (on average 3.6660581562133263) internal successors, (28115), 7669 states have internal predecessors, (28115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:17:08,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7670 states to 7670 states and 28115 transitions. [2021-03-11 00:17:08,509 INFO L78 Accepts]: Start accepts. Automaton has 7670 states and 28115 transitions. Word has length 32 [2021-03-11 00:17:08,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:17:08,509 INFO L480 AbstractCegarLoop]: Abstraction has 7670 states and 28115 transitions. [2021-03-11 00:17:08,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:17:08,509 INFO L276 IsEmpty]: Start isEmpty. Operand 7670 states and 28115 transitions. [2021-03-11 00:17:08,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-11 00:17:08,523 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:17:08,523 INFO L519 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] [2021-03-11 00:17:08,727 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-03-11 00:17:08,727 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:17:08,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:17:08,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1841137736, now seen corresponding path program 34 times [2021-03-11 00:17:08,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:17:08,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201864392] [2021-03-11 00:17:08,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:17:08,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:17:09,024 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2021-03-11 00:17:09,154 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 29 [2021-03-11 00:17:09,319 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2021-03-11 00:17:09,540 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2021-03-11 00:17:09,688 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-03-11 00:17:09,980 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:17:09,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201864392] [2021-03-11 00:17:09,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250777401] [2021-03-11 00:17:09,981 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:17:10,004 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:17:10,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:17:10,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-11 00:17:10,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:17:10,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-03-11 00:17:10,212 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:17:10,224 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:17:10,226 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:17:10,226 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:24 [2021-03-11 00:17:10,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:17:10,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-03-11 00:17:10,307 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:17:10,324 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:17:10,326 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:17:10,326 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:33 [2021-03-11 00:17:10,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:17:10,444 INFO L354 Elim1Store]: treesize reduction 38, result has 25.5 percent of original size [2021-03-11 00:17:10,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 32 [2021-03-11 00:17:10,447 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:17:10,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:17:10,527 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-11 00:17:10,527 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:40 [2021-03-11 00:17:10,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:17:10,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2021-03-11 00:17:10,622 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:17:10,640 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:17:10,644 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-11 00:17:10,644 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:33 [2021-03-11 00:17:10,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:17:10,766 INFO L354 Elim1Store]: treesize reduction 38, result has 25.5 percent of original size [2021-03-11 00:17:10,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 32 [2021-03-11 00:17:10,768 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:17:10,790 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:17:10,798 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-11 00:17:10,798 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:45 [2021-03-11 00:17:11,158 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:17:11,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:17:11,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 24 [2021-03-11 00:17:11,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492943860] [2021-03-11 00:17:11,158 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-11 00:17:11,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:17:11,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-11 00:17:11,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-03-11 00:17:11,159 INFO L87 Difference]: Start difference. First operand 7670 states and 28115 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:17:11,594 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 21 [2021-03-11 00:17:11,989 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 68 [2021-03-11 00:17:12,727 WARN L205 SmtUtils]: Spent 484.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 67 [2021-03-11 00:17:13,072 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 30 [2021-03-11 00:17:13,265 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 30 [2021-03-11 00:17:13,677 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 41 [2021-03-11 00:17:13,876 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 26 [2021-03-11 00:17:14,243 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 56 [2021-03-11 00:17:14,443 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2021-03-11 00:17:14,795 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 70 [2021-03-11 00:17:15,234 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 66 [2021-03-11 00:17:15,940 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 58 [2021-03-11 00:17:16,240 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2021-03-11 00:17:16,722 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 42 [2021-03-11 00:17:17,035 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 35 [2021-03-11 00:17:17,300 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 43 [2021-03-11 00:17:17,738 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 65 [2021-03-11 00:17:18,150 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 62 [2021-03-11 00:17:18,627 WARN L205 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 60 [2021-03-11 00:17:18,813 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2021-03-11 00:17:19,155 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 66 [2021-03-11 00:17:20,132 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 72 [2021-03-11 00:17:20,504 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 73 [2021-03-11 00:17:20,681 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-03-11 00:17:21,098 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-03-11 00:17:21,864 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2021-03-11 00:17:22,184 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-03-11 00:17:22,722 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2021-03-11 00:17:22,876 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-03-11 00:17:23,203 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 61 [2021-03-11 00:17:23,554 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 55 [2021-03-11 00:17:23,798 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 42 [2021-03-11 00:17:24,628 WARN L205 SmtUtils]: Spent 585.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 79 [2021-03-11 00:17:25,114 WARN L205 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 66 [2021-03-11 00:17:25,462 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2021-03-11 00:17:26,229 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 75 [2021-03-11 00:17:26,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:17:26,397 INFO L93 Difference]: Finished difference Result 15041 states and 50266 transitions. [2021-03-11 00:17:26,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-03-11 00:17:26,399 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-11 00:17:26,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:17:26,435 INFO L225 Difference]: With dead ends: 15041 [2021-03-11 00:17:26,436 INFO L226 Difference]: Without dead ends: 14093 [2021-03-11 00:17:26,436 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2202 ImplicationChecksByTransitivity, 13881.7ms TimeCoverageRelationStatistics Valid=1184, Invalid=5622, Unknown=0, NotChecked=0, Total=6806 [2021-03-11 00:17:26,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14093 states. [2021-03-11 00:17:26,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14093 to 7981. [2021-03-11 00:17:26,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7981 states, 7980 states have (on average 3.6159147869674184) internal successors, (28855), 7980 states have internal predecessors, (28855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:17:26,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7981 states to 7981 states and 28855 transitions. [2021-03-11 00:17:26,663 INFO L78 Accepts]: Start accepts. Automaton has 7981 states and 28855 transitions. Word has length 32 [2021-03-11 00:17:26,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:17:26,663 INFO L480 AbstractCegarLoop]: Abstraction has 7981 states and 28855 transitions. [2021-03-11 00:17:26,664 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:17:26,664 INFO L276 IsEmpty]: Start isEmpty. Operand 7981 states and 28855 transitions. [2021-03-11 00:17:26,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-11 00:17:26,679 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:17:26,679 INFO L519 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] [2021-03-11 00:17:26,879 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:17:26,879 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:17:26,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:17:26,880 INFO L82 PathProgramCache]: Analyzing trace with hash -564856572, now seen corresponding path program 35 times [2021-03-11 00:17:26,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:17:26,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103747580] [2021-03-11 00:17:26,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:17:26,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:17:27,743 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 25 [2021-03-11 00:17:27,847 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:17:27,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103747580] [2021-03-11 00:17:27,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230511383] [2021-03-11 00:17:27,847 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:17:27,875 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-11 00:17:27,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:17:27,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-11 00:17:27,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:17:28,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-11 00:17:28,117 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:17:28,130 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:17:28,132 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:17:28,132 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:17 [2021-03-11 00:17:28,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-03-11 00:17:28,192 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:17:28,207 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:17:28,208 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:17:28,208 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:24 [2021-03-11 00:17:28,332 INFO L354 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2021-03-11 00:17:28,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2021-03-11 00:17:28,337 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:17:28,363 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:17:28,367 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-11 00:17:28,367 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:36 [2021-03-11 00:17:28,642 INFO L354 Elim1Store]: treesize reduction 64, result has 20.0 percent of original size [2021-03-11 00:17:28,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 38 [2021-03-11 00:17:28,645 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:17:28,678 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:17:28,682 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-11 00:17:28,683 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:52, output treesize:51 [2021-03-11 00:17:29,243 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:17:29,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:17:29,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 26 [2021-03-11 00:17:29,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484759443] [2021-03-11 00:17:29,244 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-03-11 00:17:29,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:17:29,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-03-11 00:17:29,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-03-11 00:17:29,244 INFO L87 Difference]: Start difference. First operand 7981 states and 28855 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:17:34,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:17:34,177 INFO L93 Difference]: Finished difference Result 14712 states and 50770 transitions. [2021-03-11 00:17:34,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-11 00:17:34,179 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-11 00:17:34,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:17:34,217 INFO L225 Difference]: With dead ends: 14712 [2021-03-11 00:17:34,217 INFO L226 Difference]: Without dead ends: 14295 [2021-03-11 00:17:34,217 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 3495.6ms TimeCoverageRelationStatistics Valid=422, Invalid=2334, Unknown=0, NotChecked=0, Total=2756 [2021-03-11 00:17:34,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14295 states. [2021-03-11 00:17:34,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14295 to 7431. [2021-03-11 00:17:34,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7431 states, 7430 states have (on average 3.677658142664872) internal successors, (27325), 7430 states have internal predecessors, (27325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:17:34,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7431 states to 7431 states and 27325 transitions. [2021-03-11 00:17:34,412 INFO L78 Accepts]: Start accepts. Automaton has 7431 states and 27325 transitions. Word has length 32 [2021-03-11 00:17:34,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:17:34,412 INFO L480 AbstractCegarLoop]: Abstraction has 7431 states and 27325 transitions. [2021-03-11 00:17:34,412 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:17:34,412 INFO L276 IsEmpty]: Start isEmpty. Operand 7431 states and 27325 transitions. [2021-03-11 00:17:34,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-11 00:17:34,426 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:17:34,427 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:17:34,627 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-03-11 00:17:34,627 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:17:34,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:17:34,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1539718298, now seen corresponding path program 28 times [2021-03-11 00:17:34,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:17:34,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188981317] [2021-03-11 00:17:34,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:17:34,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:17:34,793 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:17:34,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188981317] [2021-03-11 00:17:34,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101704086] [2021-03-11 00:17:34,794 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:17:34,866 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:17:34,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:17:34,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-11 00:17:34,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:17:35,231 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:17:35,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:17:35,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-03-11 00:17:35,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379792158] [2021-03-11 00:17:35,233 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-11 00:17:35,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:17:35,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-11 00:17:35,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:17:35,234 INFO L87 Difference]: Start difference. First operand 7431 states and 27325 transitions. Second operand has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:17:36,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:17:36,645 INFO L93 Difference]: Finished difference Result 12227 states and 42154 transitions. [2021-03-11 00:17:36,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-11 00:17:36,646 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-03-11 00:17:36,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:17:36,673 INFO L225 Difference]: With dead ends: 12227 [2021-03-11 00:17:36,674 INFO L226 Difference]: Without dead ends: 12227 [2021-03-11 00:17:36,674 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 963.4ms TimeCoverageRelationStatistics Valid=401, Invalid=1159, Unknown=0, NotChecked=0, Total=1560 [2021-03-11 00:17:36,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12227 states. [2021-03-11 00:17:36,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12227 to 8555. [2021-03-11 00:17:36,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8555 states, 8554 states have (on average 3.6043956043956045) internal successors, (30832), 8554 states have internal predecessors, (30832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:17:36,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8555 states to 8555 states and 30832 transitions. [2021-03-11 00:17:36,894 INFO L78 Accepts]: Start accepts. Automaton has 8555 states and 30832 transitions. Word has length 34 [2021-03-11 00:17:36,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:17:36,894 INFO L480 AbstractCegarLoop]: Abstraction has 8555 states and 30832 transitions. [2021-03-11 00:17:36,894 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:17:36,894 INFO L276 IsEmpty]: Start isEmpty. Operand 8555 states and 30832 transitions. [2021-03-11 00:17:36,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-11 00:17:36,910 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:17:36,910 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:17:37,110 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:17:37,111 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:17:37,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:17:37,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1699871604, now seen corresponding path program 29 times [2021-03-11 00:17:37,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:17:37,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32933981] [2021-03-11 00:17:37,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:17:37,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:17:37,282 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:17:37,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32933981] [2021-03-11 00:17:37,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678206020] [2021-03-11 00:17:37,282 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:17:37,312 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-11 00:17:37,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:17:37,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:17:37,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:17:37,713 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-11 00:17:37,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:17:37,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-03-11 00:17:37,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384062846] [2021-03-11 00:17:37,714 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:17:37,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:17:37,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:17:37,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:17:37,714 INFO L87 Difference]: Start difference. First operand 8555 states and 30832 transitions. Second operand has 20 states, 20 states have (on average 2.8) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:17:40,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:17:40,538 INFO L93 Difference]: Finished difference Result 13292 states and 44861 transitions. [2021-03-11 00:17:40,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-03-11 00:17:40,540 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-03-11 00:17:40,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:17:40,575 INFO L225 Difference]: With dead ends: 13292 [2021-03-11 00:17:40,575 INFO L226 Difference]: Without dead ends: 13292 [2021-03-11 00:17:40,576 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1883 ImplicationChecksByTransitivity, 2219.5ms TimeCoverageRelationStatistics Valid=1019, Invalid=4383, Unknown=0, NotChecked=0, Total=5402 [2021-03-11 00:17:40,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13292 states. [2021-03-11 00:17:40,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13292 to 8677. [2021-03-11 00:17:40,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8677 states, 8676 states have (on average 3.596934071000461) internal successors, (31207), 8676 states have internal predecessors, (31207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:17:40,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8677 states to 8677 states and 31207 transitions. [2021-03-11 00:17:40,827 INFO L78 Accepts]: Start accepts. Automaton has 8677 states and 31207 transitions. Word has length 34 [2021-03-11 00:17:40,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:17:40,827 INFO L480 AbstractCegarLoop]: Abstraction has 8677 states and 31207 transitions. [2021-03-11 00:17:40,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:17:40,827 INFO L276 IsEmpty]: Start isEmpty. Operand 8677 states and 31207 transitions. [2021-03-11 00:17:40,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-11 00:17:40,843 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:17:40,843 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:17:41,043 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-03-11 00:17:41,044 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:17:41,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:17:41,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1909728636, now seen corresponding path program 30 times [2021-03-11 00:17:41,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:17:41,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398565152] [2021-03-11 00:17:41,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:17:41,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:17:41,186 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 13 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:17:41,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398565152] [2021-03-11 00:17:41,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879687416] [2021-03-11 00:17:41,186 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:17:41,209 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-11 00:17:41,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:17:41,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-11 00:17:41,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:17:41,520 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:17:41,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:17:41,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-03-11 00:17:41,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90300585] [2021-03-11 00:17:41,521 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:17:41,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:17:41,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:17:41,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:17:41,521 INFO L87 Difference]: Start difference. First operand 8677 states and 31207 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:17:43,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:17:43,352 INFO L93 Difference]: Finished difference Result 12421 states and 42959 transitions. [2021-03-11 00:17:43,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-11 00:17:43,353 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-03-11 00:17:43,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:17:43,386 INFO L225 Difference]: With dead ends: 12421 [2021-03-11 00:17:43,386 INFO L226 Difference]: Without dead ends: 12409 [2021-03-11 00:17:43,386 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 1237.3ms TimeCoverageRelationStatistics Valid=520, Invalid=2030, Unknown=0, NotChecked=0, Total=2550 [2021-03-11 00:17:43,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12409 states. [2021-03-11 00:17:43,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12409 to 8715. [2021-03-11 00:17:43,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8715 states, 8714 states have (on average 3.594675235253615) internal successors, (31324), 8714 states have internal predecessors, (31324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:17:43,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8715 states to 8715 states and 31324 transitions. [2021-03-11 00:17:43,642 INFO L78 Accepts]: Start accepts. Automaton has 8715 states and 31324 transitions. Word has length 34 [2021-03-11 00:17:43,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:17:43,642 INFO L480 AbstractCegarLoop]: Abstraction has 8715 states and 31324 transitions. [2021-03-11 00:17:43,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:17:43,642 INFO L276 IsEmpty]: Start isEmpty. Operand 8715 states and 31324 transitions. [2021-03-11 00:17:43,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-11 00:17:43,658 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:17:43,658 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:17:43,860 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-03-11 00:17:43,860 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:17:43,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:17:43,861 INFO L82 PathProgramCache]: Analyzing trace with hash 150437974, now seen corresponding path program 31 times [2021-03-11 00:17:43,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:17:43,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947846543] [2021-03-11 00:17:43,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:17:43,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:17:44,078 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:17:44,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947846543] [2021-03-11 00:17:44,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788687294] [2021-03-11 00:17:44,079 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:17:44,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:17:44,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:17:44,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:17:44,453 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-11 00:17:44,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:17:44,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-03-11 00:17:44,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229087988] [2021-03-11 00:17:44,454 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:17:44,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:17:44,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:17:44,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:17:44,454 INFO L87 Difference]: Start difference. First operand 8715 states and 31324 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:17:45,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:17:45,654 INFO L93 Difference]: Finished difference Result 12190 states and 42541 transitions. [2021-03-11 00:17:45,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-03-11 00:17:45,657 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-03-11 00:17:45,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:17:45,685 INFO L225 Difference]: With dead ends: 12190 [2021-03-11 00:17:45,685 INFO L226 Difference]: Without dead ends: 12154 [2021-03-11 00:17:45,686 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 935.9ms TimeCoverageRelationStatistics Valid=354, Invalid=1368, Unknown=0, NotChecked=0, Total=1722 [2021-03-11 00:17:45,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12154 states. [2021-03-11 00:17:45,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12154 to 8771. [2021-03-11 00:17:45,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8771 states, 8770 states have (on average 3.5904218928164195) internal successors, (31488), 8770 states have internal predecessors, (31488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:17:45,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8771 states to 8771 states and 31488 transitions. [2021-03-11 00:17:45,907 INFO L78 Accepts]: Start accepts. Automaton has 8771 states and 31488 transitions. Word has length 34 [2021-03-11 00:17:45,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:17:45,908 INFO L480 AbstractCegarLoop]: Abstraction has 8771 states and 31488 transitions. [2021-03-11 00:17:45,908 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:17:45,908 INFO L276 IsEmpty]: Start isEmpty. Operand 8771 states and 31488 transitions. [2021-03-11 00:17:45,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-11 00:17:45,925 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:17:45,925 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:17:46,125 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-03-11 00:17:46,126 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:17:46,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:17:46,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1876456102, now seen corresponding path program 32 times [2021-03-11 00:17:46,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:17:46,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921369504] [2021-03-11 00:17:46,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:17:46,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:17:46,306 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:17:46,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921369504] [2021-03-11 00:17:46,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655322350] [2021-03-11 00:17:46,307 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:17:46,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:17:46,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:17:46,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:17:46,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:17:46,566 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-11 00:17:46,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:17:46,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-03-11 00:17:46,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738531516] [2021-03-11 00:17:46,567 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:17:46,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:17:46,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:17:46,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:17:46,567 INFO L87 Difference]: Start difference. First operand 8771 states and 31488 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:17:47,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:17:47,439 INFO L93 Difference]: Finished difference Result 11808 states and 41522 transitions. [2021-03-11 00:17:47,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-11 00:17:47,441 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-03-11 00:17:47,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:17:47,469 INFO L225 Difference]: With dead ends: 11808 [2021-03-11 00:17:47,470 INFO L226 Difference]: Without dead ends: 11748 [2021-03-11 00:17:47,470 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 570.9ms TimeCoverageRelationStatistics Valid=195, Invalid=675, Unknown=0, NotChecked=0, Total=870 [2021-03-11 00:17:47,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11748 states. [2021-03-11 00:17:47,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11748 to 8789. [2021-03-11 00:17:47,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8789 states, 8788 states have (on average 3.5890987710514337) internal successors, (31541), 8788 states have internal predecessors, (31541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:17:47,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8789 states to 8789 states and 31541 transitions. [2021-03-11 00:17:47,681 INFO L78 Accepts]: Start accepts. Automaton has 8789 states and 31541 transitions. Word has length 34 [2021-03-11 00:17:47,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:17:47,681 INFO L480 AbstractCegarLoop]: Abstraction has 8789 states and 31541 transitions. [2021-03-11 00:17:47,681 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:17:47,682 INFO L276 IsEmpty]: Start isEmpty. Operand 8789 states and 31541 transitions. [2021-03-11 00:17:47,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-11 00:17:47,697 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:17:47,697 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:17:47,903 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:17:47,903 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:17:47,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:17:47,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1845655966, now seen corresponding path program 33 times [2021-03-11 00:17:47,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:17:47,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982208941] [2021-03-11 00:17:47,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:17:47,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:17:48,032 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:17:48,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982208941] [2021-03-11 00:17:48,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524174847] [2021-03-11 00:17:48,033 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:17:48,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-11 00:17:48,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:17:48,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-11 00:17:48,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:17:48,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-03-11 00:17:48,355 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:17:48,372 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:17:48,374 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:17:48,374 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-03-11 00:17:48,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:17:48,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-03-11 00:17:48,494 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:17:48,520 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:17:48,524 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-11 00:17:48,524 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:41 [2021-03-11 00:17:48,815 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-11 00:17:48,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:17:48,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-03-11 00:17:48,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577452347] [2021-03-11 00:17:48,815 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-11 00:17:48,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:17:48,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-11 00:17:48,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-03-11 00:17:48,816 INFO L87 Difference]: Start difference. First operand 8789 states and 31541 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:17:53,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:17:53,869 INFO L93 Difference]: Finished difference Result 16172 states and 53958 transitions. [2021-03-11 00:17:53,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-03-11 00:17:53,871 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-03-11 00:17:53,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:17:53,912 INFO L225 Difference]: With dead ends: 16172 [2021-03-11 00:17:53,912 INFO L226 Difference]: Without dead ends: 16172 [2021-03-11 00:17:53,912 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2063 ImplicationChecksByTransitivity, 3549.8ms TimeCoverageRelationStatistics Valid=1249, Invalid=5231, Unknown=0, NotChecked=0, Total=6480 [2021-03-11 00:17:53,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16172 states. [2021-03-11 00:17:54,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16172 to 8975. [2021-03-11 00:17:54,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8975 states, 8974 states have (on average 3.59605527078226) internal successors, (32271), 8974 states have internal predecessors, (32271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:17:54,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8975 states to 8975 states and 32271 transitions. [2021-03-11 00:17:54,180 INFO L78 Accepts]: Start accepts. Automaton has 8975 states and 32271 transitions. Word has length 34 [2021-03-11 00:17:54,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:17:54,180 INFO L480 AbstractCegarLoop]: Abstraction has 8975 states and 32271 transitions. [2021-03-11 00:17:54,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:17:54,180 INFO L276 IsEmpty]: Start isEmpty. Operand 8975 states and 32271 transitions. [2021-03-11 00:17:54,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-11 00:17:54,197 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:17:54,197 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:17:54,397 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-03-11 00:17:54,398 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:17:54,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:17:54,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1393933936, now seen corresponding path program 34 times [2021-03-11 00:17:54,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:17:54,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462485357] [2021-03-11 00:17:54,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:17:54,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:17:54,541 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:17:54,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462485357] [2021-03-11 00:17:54,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537884977] [2021-03-11 00:17:54,541 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:17:54,564 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:17:54,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:17:54,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-11 00:17:54,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:17:54,937 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:17:54,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:17:54,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-03-11 00:17:54,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080048713] [2021-03-11 00:17:54,937 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-11 00:17:54,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:17:54,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-11 00:17:54,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:17:54,938 INFO L87 Difference]: Start difference. First operand 8975 states and 32271 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:17:57,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:17:57,719 INFO L93 Difference]: Finished difference Result 24036 states and 79889 transitions. [2021-03-11 00:17:57,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-03-11 00:17:57,721 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-03-11 00:17:57,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:17:57,786 INFO L225 Difference]: With dead ends: 24036 [2021-03-11 00:17:57,786 INFO L226 Difference]: Without dead ends: 24032 [2021-03-11 00:17:57,787 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 1647.7ms TimeCoverageRelationStatistics Valid=841, Invalid=2699, Unknown=0, NotChecked=0, Total=3540 [2021-03-11 00:17:57,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24032 states. [2021-03-11 00:17:58,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24032 to 11047. [2021-03-11 00:17:58,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11047 states, 11046 states have (on average 3.7311243889190657) internal successors, (41214), 11046 states have internal predecessors, (41214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:17:58,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11047 states to 11047 states and 41214 transitions. [2021-03-11 00:17:58,225 INFO L78 Accepts]: Start accepts. Automaton has 11047 states and 41214 transitions. Word has length 34 [2021-03-11 00:17:58,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:17:58,225 INFO L480 AbstractCegarLoop]: Abstraction has 11047 states and 41214 transitions. [2021-03-11 00:17:58,225 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:17:58,226 INFO L276 IsEmpty]: Start isEmpty. Operand 11047 states and 41214 transitions. [2021-03-11 00:17:58,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-11 00:17:58,249 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:17:58,249 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:17:58,449 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:17:58,449 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:17:58,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:17:58,450 INFO L82 PathProgramCache]: Analyzing trace with hash 764640244, now seen corresponding path program 35 times [2021-03-11 00:17:58,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:17:58,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743696463] [2021-03-11 00:17:58,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:17:58,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:17:58,593 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:17:58,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743696463] [2021-03-11 00:17:58,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993107714] [2021-03-11 00:17:58,593 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:17:58,617 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-11 00:17:58,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:17:58,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-11 00:17:58,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:17:58,968 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:17:58,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:17:58,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-03-11 00:17:58,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818137438] [2021-03-11 00:17:58,969 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:17:58,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:17:58,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:17:58,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:17:58,969 INFO L87 Difference]: Start difference. First operand 11047 states and 41214 transitions. Second operand has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:18:00,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:18:00,845 INFO L93 Difference]: Finished difference Result 22537 states and 75410 transitions. [2021-03-11 00:18:00,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-11 00:18:00,848 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-03-11 00:18:00,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:18:00,996 INFO L225 Difference]: With dead ends: 22537 [2021-03-11 00:18:00,996 INFO L226 Difference]: Without dead ends: 22509 [2021-03-11 00:18:00,996 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 1131.0ms TimeCoverageRelationStatistics Valid=545, Invalid=1525, Unknown=0, NotChecked=0, Total=2070 [2021-03-11 00:18:01,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22509 states. [2021-03-11 00:18:01,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22509 to 11049. [2021-03-11 00:18:01,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11049 states, 11048 states have (on average 3.730720492396814) internal successors, (41217), 11048 states have internal predecessors, (41217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:18:01,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11049 states to 11049 states and 41217 transitions. [2021-03-11 00:18:01,382 INFO L78 Accepts]: Start accepts. Automaton has 11049 states and 41217 transitions. Word has length 34 [2021-03-11 00:18:01,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:18:01,382 INFO L480 AbstractCegarLoop]: Abstraction has 11049 states and 41217 transitions. [2021-03-11 00:18:01,382 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:18:01,382 INFO L276 IsEmpty]: Start isEmpty. Operand 11049 states and 41217 transitions. [2021-03-11 00:18:01,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-11 00:18:01,403 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:18:01,403 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:18:01,603 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-03-11 00:18:01,604 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:18:01,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:18:01,604 INFO L82 PathProgramCache]: Analyzing trace with hash 338290534, now seen corresponding path program 36 times [2021-03-11 00:18:01,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:18:01,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828542198] [2021-03-11 00:18:01,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:18:01,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:18:01,759 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:18:01,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828542198] [2021-03-11 00:18:01,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354061671] [2021-03-11 00:18:01,760 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:18:01,782 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-11 00:18:01,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:18:01,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:18:01,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:18:02,124 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-11 00:18:02,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:18:02,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-03-11 00:18:02,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137205596] [2021-03-11 00:18:02,124 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:18:02,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:18:02,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:18:02,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:18:02,125 INFO L87 Difference]: Start difference. First operand 11049 states and 41217 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:18:06,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:18:06,817 INFO L93 Difference]: Finished difference Result 29555 states and 100040 transitions. [2021-03-11 00:18:06,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-03-11 00:18:06,819 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-03-11 00:18:06,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:18:06,905 INFO L225 Difference]: With dead ends: 29555 [2021-03-11 00:18:06,905 INFO L226 Difference]: Without dead ends: 29555 [2021-03-11 00:18:06,906 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3161 ImplicationChecksByTransitivity, 2869.5ms TimeCoverageRelationStatistics Valid=1869, Invalid=6503, Unknown=0, NotChecked=0, Total=8372 [2021-03-11 00:18:06,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29555 states. [2021-03-11 00:18:07,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29555 to 12824. [2021-03-11 00:18:07,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12824 states, 12823 states have (on average 3.804257973953053) internal successors, (48782), 12823 states have internal predecessors, (48782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:18:07,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12824 states to 12824 states and 48782 transitions. [2021-03-11 00:18:07,442 INFO L78 Accepts]: Start accepts. Automaton has 12824 states and 48782 transitions. Word has length 34 [2021-03-11 00:18:07,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:18:07,442 INFO L480 AbstractCegarLoop]: Abstraction has 12824 states and 48782 transitions. [2021-03-11 00:18:07,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:18:07,442 INFO L276 IsEmpty]: Start isEmpty. Operand 12824 states and 48782 transitions. [2021-03-11 00:18:07,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-11 00:18:07,470 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:18:07,470 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:18:07,672 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:18:07,672 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:18:07,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:18:07,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1781126392, now seen corresponding path program 36 times [2021-03-11 00:18:07,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:18:07,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262799329] [2021-03-11 00:18:07,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:18:07,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:18:07,852 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:18:07,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262799329] [2021-03-11 00:18:07,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010813299] [2021-03-11 00:18:07,853 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:18:07,874 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-11 00:18:07,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:18:07,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-11 00:18:07,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:18:08,345 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-11 00:18:08,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:18:08,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2021-03-11 00:18:08,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111552482] [2021-03-11 00:18:08,346 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-11 00:18:08,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:18:08,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-11 00:18:08,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-03-11 00:18:08,346 INFO L87 Difference]: Start difference. First operand 12824 states and 48782 transitions. Second operand has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:18:16,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:18:16,332 INFO L93 Difference]: Finished difference Result 33922 states and 120694 transitions. [2021-03-11 00:18:16,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2021-03-11 00:18:16,334 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-03-11 00:18:16,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:18:16,436 INFO L225 Difference]: With dead ends: 33922 [2021-03-11 00:18:16,436 INFO L226 Difference]: Without dead ends: 33922 [2021-03-11 00:18:16,438 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7207 ImplicationChecksByTransitivity, 5113.6ms TimeCoverageRelationStatistics Valid=3677, Invalid=15505, Unknown=0, NotChecked=0, Total=19182 [2021-03-11 00:18:16,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33922 states. [2021-03-11 00:18:17,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33922 to 14713. [2021-03-11 00:18:17,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14713 states, 14712 states have (on average 3.884448069603045) internal successors, (57148), 14712 states have internal predecessors, (57148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:18:17,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14713 states to 14713 states and 57148 transitions. [2021-03-11 00:18:17,126 INFO L78 Accepts]: Start accepts. Automaton has 14713 states and 57148 transitions. Word has length 36 [2021-03-11 00:18:17,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:18:17,126 INFO L480 AbstractCegarLoop]: Abstraction has 14713 states and 57148 transitions. [2021-03-11 00:18:17,126 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:18:17,126 INFO L276 IsEmpty]: Start isEmpty. Operand 14713 states and 57148 transitions. [2021-03-11 00:18:17,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-11 00:18:17,161 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:18:17,161 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:18:17,362 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:18:17,362 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:18:17,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:18:17,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1765665596, now seen corresponding path program 37 times [2021-03-11 00:18:17,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:18:17,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289118237] [2021-03-11 00:18:17,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:18:17,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:18:17,609 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:18:17,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289118237] [2021-03-11 00:18:17,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374035087] [2021-03-11 00:18:17,610 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:18:17,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:18:17,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-11 00:18:17,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:18:18,177 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:18:18,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:18:18,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-03-11 00:18:18,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638392511] [2021-03-11 00:18:18,178 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-11 00:18:18,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:18:18,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-11 00:18:18,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2021-03-11 00:18:18,179 INFO L87 Difference]: Start difference. First operand 14713 states and 57148 transitions. Second operand has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:18:22,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:18:22,292 INFO L93 Difference]: Finished difference Result 31951 states and 113896 transitions. [2021-03-11 00:18:22,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-03-11 00:18:22,294 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have 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 [2021-03-11 00:18:22,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:18:22,388 INFO L225 Difference]: With dead ends: 31951 [2021-03-11 00:18:22,388 INFO L226 Difference]: Without dead ends: 31951 [2021-03-11 00:18:22,389 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2349 ImplicationChecksByTransitivity, 2569.0ms TimeCoverageRelationStatistics Valid=1560, Invalid=5246, Unknown=0, NotChecked=0, Total=6806 [2021-03-11 00:18:22,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31951 states. [2021-03-11 00:18:22,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31951 to 14321. [2021-03-11 00:18:22,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14321 states, 14320 states have (on average 3.8514664804469274) internal successors, (55153), 14320 states have internal predecessors, (55153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:18:22,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14321 states to 14321 states and 55153 transitions. [2021-03-11 00:18:22,955 INFO L78 Accepts]: Start accepts. Automaton has 14321 states and 55153 transitions. Word has length 36 [2021-03-11 00:18:22,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:18:22,955 INFO L480 AbstractCegarLoop]: Abstraction has 14321 states and 55153 transitions. [2021-03-11 00:18:22,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:18:22,955 INFO L276 IsEmpty]: Start isEmpty. Operand 14321 states and 55153 transitions. [2021-03-11 00:18:22,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-11 00:18:22,985 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:18:22,985 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:18:23,186 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:18:23,186 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:18:23,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:18:23,186 INFO L82 PathProgramCache]: Analyzing trace with hash -610681024, now seen corresponding path program 38 times [2021-03-11 00:18:23,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:18:23,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704703246] [2021-03-11 00:18:23,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:18:23,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:18:23,377 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:18:23,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704703246] [2021-03-11 00:18:23,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039477375] [2021-03-11 00:18:23,377 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:18:23,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:18:23,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:18:23,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-11 00:18:23,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:18:23,870 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:18:23,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:18:23,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-03-11 00:18:23,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634894868] [2021-03-11 00:18:23,871 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-11 00:18:23,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:18:23,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-11 00:18:23,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:18:23,875 INFO L87 Difference]: Start difference. First operand 14321 states and 55153 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:18:26,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:18:26,748 INFO L93 Difference]: Finished difference Result 27759 states and 99712 transitions. [2021-03-11 00:18:26,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-03-11 00:18:26,750 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-03-11 00:18:26,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:18:26,834 INFO L225 Difference]: With dead ends: 27759 [2021-03-11 00:18:26,834 INFO L226 Difference]: Without dead ends: 27759 [2021-03-11 00:18:26,835 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1076 ImplicationChecksByTransitivity, 1627.4ms TimeCoverageRelationStatistics Valid=763, Invalid=2777, Unknown=0, NotChecked=0, Total=3540 [2021-03-11 00:18:26,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27759 states. [2021-03-11 00:18:27,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27759 to 14534. [2021-03-11 00:18:27,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14534 states, 14533 states have (on average 3.8374045276267803) internal successors, (55769), 14533 states have internal predecessors, (55769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:18:27,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14534 states to 14534 states and 55769 transitions. [2021-03-11 00:18:27,358 INFO L78 Accepts]: Start accepts. Automaton has 14534 states and 55769 transitions. Word has length 36 [2021-03-11 00:18:27,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:18:27,358 INFO L480 AbstractCegarLoop]: Abstraction has 14534 states and 55769 transitions. [2021-03-11 00:18:27,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:18:27,358 INFO L276 IsEmpty]: Start isEmpty. Operand 14534 states and 55769 transitions. [2021-03-11 00:18:27,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-11 00:18:27,388 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:18:27,388 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:18:27,589 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-03-11 00:18:27,589 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:18:27,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:18:27,589 INFO L82 PathProgramCache]: Analyzing trace with hash -2146021892, now seen corresponding path program 39 times [2021-03-11 00:18:27,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:18:27,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002615617] [2021-03-11 00:18:27,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:18:27,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:18:27,792 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:18:27,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002615617] [2021-03-11 00:18:27,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375767891] [2021-03-11 00:18:27,793 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:18:27,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-11 00:18:27,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:18:27,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-11 00:18:27,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:18:28,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-11 00:18:28,084 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:18:28,106 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:18:28,111 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-11 00:18:28,111 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:25 [2021-03-11 00:18:28,224 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-03-11 00:18:28,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-03-11 00:18:28,228 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:18:28,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:18:28,265 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-11 00:18:28,266 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:37 [2021-03-11 00:18:28,595 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-03-11 00:18:28,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2021-03-11 00:18:28,599 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:18:28,634 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:18:28,645 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-03-11 00:18:28,646 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:47, output treesize:46 [2021-03-11 00:18:28,925 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-03-11 00:18:28,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:18:28,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-03-11 00:18:28,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569070653] [2021-03-11 00:18:28,926 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-11 00:18:28,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:18:28,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-11 00:18:28,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-03-11 00:18:28,926 INFO L87 Difference]: Start difference. First operand 14534 states and 55769 transitions. Second operand has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:18:47,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:18:47,353 INFO L93 Difference]: Finished difference Result 30005 states and 104469 transitions. [2021-03-11 00:18:47,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2021-03-11 00:18:47,355 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-03-11 00:18:47,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:18:47,444 INFO L225 Difference]: With dead ends: 30005 [2021-03-11 00:18:47,444 INFO L226 Difference]: Without dead ends: 29779 [2021-03-11 00:18:47,446 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9982 ImplicationChecksByTransitivity, 10118.3ms TimeCoverageRelationStatistics Valid=3338, Invalid=23068, Unknown=0, NotChecked=0, Total=26406 [2021-03-11 00:18:47,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29779 states. [2021-03-11 00:18:47,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29779 to 16232. [2021-03-11 00:18:47,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16232 states, 16231 states have (on average 3.8969872466268254) internal successors, (63252), 16231 states have internal predecessors, (63252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:18:48,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16232 states to 16232 states and 63252 transitions. [2021-03-11 00:18:48,026 INFO L78 Accepts]: Start accepts. Automaton has 16232 states and 63252 transitions. Word has length 36 [2021-03-11 00:18:48,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:18:48,026 INFO L480 AbstractCegarLoop]: Abstraction has 16232 states and 63252 transitions. [2021-03-11 00:18:48,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:18:48,026 INFO L276 IsEmpty]: Start isEmpty. Operand 16232 states and 63252 transitions. [2021-03-11 00:18:48,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-11 00:18:48,060 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:18:48,060 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:18:48,261 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:18:48,261 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:18:48,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:18:48,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1242329482, now seen corresponding path program 40 times [2021-03-11 00:18:48,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:18:48,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075448728] [2021-03-11 00:18:48,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:18:48,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:18:48,415 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:18:48,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075448728] [2021-03-11 00:18:48,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620704910] [2021-03-11 00:18:48,415 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:18:48,451 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:18:48,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:18:48,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-11 00:18:48,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:18:48,985 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:18:48,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:18:48,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-03-11 00:18:48,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109591733] [2021-03-11 00:18:48,985 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:18:48,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:18:48,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:18:48,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:18:48,986 INFO L87 Difference]: Start difference. First operand 16232 states and 63252 transitions. Second operand has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:18:55,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:18:55,838 INFO L93 Difference]: Finished difference Result 33064 states and 118366 transitions. [2021-03-11 00:18:55,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-03-11 00:18:55,841 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-03-11 00:18:55,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:18:55,943 INFO L225 Difference]: With dead ends: 33064 [2021-03-11 00:18:55,943 INFO L226 Difference]: Without dead ends: 33056 [2021-03-11 00:18:55,944 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4831 ImplicationChecksByTransitivity, 4220.3ms TimeCoverageRelationStatistics Valid=2444, Invalid=10212, Unknown=0, NotChecked=0, Total=12656 [2021-03-11 00:18:55,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33056 states. [2021-03-11 00:18:56,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33056 to 16203. [2021-03-11 00:18:56,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16203 states, 16202 states have (on average 3.897481792371312) internal successors, (63147), 16202 states have internal predecessors, (63147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:18:56,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16203 states to 16203 states and 63147 transitions. [2021-03-11 00:18:56,773 INFO L78 Accepts]: Start accepts. Automaton has 16203 states and 63147 transitions. Word has length 36 [2021-03-11 00:18:56,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:18:56,773 INFO L480 AbstractCegarLoop]: Abstraction has 16203 states and 63147 transitions. [2021-03-11 00:18:56,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:18:56,773 INFO L276 IsEmpty]: Start isEmpty. Operand 16203 states and 63147 transitions. [2021-03-11 00:18:56,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-11 00:18:56,808 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:18:56,808 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:18:57,008 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:18:57,008 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:18:57,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:18:57,009 INFO L82 PathProgramCache]: Analyzing trace with hash -999630980, now seen corresponding path program 41 times [2021-03-11 00:18:57,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:18:57,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891720509] [2021-03-11 00:18:57,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:18:57,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:18:57,181 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:18:57,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891720509] [2021-03-11 00:18:57,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893171290] [2021-03-11 00:18:57,182 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:18:57,215 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-11 00:18:57,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:18:57,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-11 00:18:57,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:18:57,856 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:18:57,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:18:57,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-03-11 00:18:57,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228528593] [2021-03-11 00:18:57,857 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:18:57,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:18:57,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:18:57,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:18:57,857 INFO L87 Difference]: Start difference. First operand 16203 states and 63147 transitions. Second operand has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:04,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:19:04,716 INFO L93 Difference]: Finished difference Result 36385 states and 129883 transitions. [2021-03-11 00:19:04,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2021-03-11 00:19:04,718 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-03-11 00:19:04,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:19:04,813 INFO L225 Difference]: With dead ends: 36385 [2021-03-11 00:19:04,813 INFO L226 Difference]: Without dead ends: 36385 [2021-03-11 00:19:04,814 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8689 ImplicationChecksByTransitivity, 4652.2ms TimeCoverageRelationStatistics Valid=3708, Invalid=17754, Unknown=0, NotChecked=0, Total=21462 [2021-03-11 00:19:04,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36385 states. [2021-03-11 00:19:05,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36385 to 16302. [2021-03-11 00:19:05,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16302 states, 16301 states have (on average 3.903748236304521) internal successors, (63635), 16301 states have internal predecessors, (63635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:05,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16302 states to 16302 states and 63635 transitions. [2021-03-11 00:19:05,384 INFO L78 Accepts]: Start accepts. Automaton has 16302 states and 63635 transitions. Word has length 36 [2021-03-11 00:19:05,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:19:05,384 INFO L480 AbstractCegarLoop]: Abstraction has 16302 states and 63635 transitions. [2021-03-11 00:19:05,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:05,384 INFO L276 IsEmpty]: Start isEmpty. Operand 16302 states and 63635 transitions. [2021-03-11 00:19:05,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-11 00:19:05,409 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:19:05,409 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:19:05,609 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-03-11 00:19:05,609 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:19:05,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:19:05,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1594791238, now seen corresponding path program 42 times [2021-03-11 00:19:05,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:19:05,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107038146] [2021-03-11 00:19:05,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:19:05,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:19:05,718 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:05,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107038146] [2021-03-11 00:19:05,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867688852] [2021-03-11 00:19:05,719 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:19:05,746 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-11 00:19:05,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:19:05,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-11 00:19:05,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:19:06,241 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:06,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:19:06,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2021-03-11 00:19:06,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678511431] [2021-03-11 00:19:06,241 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:19:06,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:19:06,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:19:06,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:19:06,242 INFO L87 Difference]: Start difference. First operand 16302 states and 63635 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:08,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:19:08,214 INFO L93 Difference]: Finished difference Result 33311 states and 121916 transitions. [2021-03-11 00:19:08,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-03-11 00:19:08,215 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-03-11 00:19:08,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:19:08,298 INFO L225 Difference]: With dead ends: 33311 [2021-03-11 00:19:08,299 INFO L226 Difference]: Without dead ends: 33299 [2021-03-11 00:19:08,299 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 907 ImplicationChecksByTransitivity, 1208.6ms TimeCoverageRelationStatistics Valid=771, Invalid=2535, Unknown=0, NotChecked=0, Total=3306 [2021-03-11 00:19:08,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33299 states. [2021-03-11 00:19:08,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33299 to 16301. [2021-03-11 00:19:08,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16301 states, 16300 states have (on average 3.903680981595092) internal successors, (63630), 16300 states have internal predecessors, (63630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:08,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16301 states to 16301 states and 63630 transitions. [2021-03-11 00:19:08,827 INFO L78 Accepts]: Start accepts. Automaton has 16301 states and 63630 transitions. Word has length 36 [2021-03-11 00:19:08,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:19:08,827 INFO L480 AbstractCegarLoop]: Abstraction has 16301 states and 63630 transitions. [2021-03-11 00:19:08,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:08,827 INFO L276 IsEmpty]: Start isEmpty. Operand 16301 states and 63630 transitions. [2021-03-11 00:19:08,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-11 00:19:08,852 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:19:08,852 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:19:09,053 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-03-11 00:19:09,053 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:19:09,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:19:09,053 INFO L82 PathProgramCache]: Analyzing trace with hash 619738612, now seen corresponding path program 43 times [2021-03-11 00:19:09,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:19:09,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811913437] [2021-03-11 00:19:09,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:19:09,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:19:09,144 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:09,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811913437] [2021-03-11 00:19:09,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165651743] [2021-03-11 00:19:09,145 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:19:09,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:19:09,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-11 00:19:09,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:19:09,571 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:09,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:19:09,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-03-11 00:19:09,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597312567] [2021-03-11 00:19:09,572 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:19:09,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:19:09,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:19:09,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:19:09,572 INFO L87 Difference]: Start difference. First operand 16301 states and 63630 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:11,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:19:11,201 INFO L93 Difference]: Finished difference Result 30739 states and 112830 transitions. [2021-03-11 00:19:11,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-03-11 00:19:11,203 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-03-11 00:19:11,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:19:11,344 INFO L225 Difference]: With dead ends: 30739 [2021-03-11 00:19:11,344 INFO L226 Difference]: Without dead ends: 30739 [2021-03-11 00:19:11,344 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 722 ImplicationChecksByTransitivity, 931.5ms TimeCoverageRelationStatistics Valid=579, Invalid=1971, Unknown=0, NotChecked=0, Total=2550 [2021-03-11 00:19:11,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30739 states. [2021-03-11 00:19:11,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30739 to 16335. [2021-03-11 00:19:11,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16335 states, 16334 states have (on average 3.903085588343333) internal successors, (63753), 16334 states have internal predecessors, (63753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:11,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16335 states to 16335 states and 63753 transitions. [2021-03-11 00:19:11,828 INFO L78 Accepts]: Start accepts. Automaton has 16335 states and 63753 transitions. Word has length 36 [2021-03-11 00:19:11,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:19:11,828 INFO L480 AbstractCegarLoop]: Abstraction has 16335 states and 63753 transitions. [2021-03-11 00:19:11,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:11,828 INFO L276 IsEmpty]: Start isEmpty. Operand 16335 states and 63753 transitions. [2021-03-11 00:19:11,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-11 00:19:11,853 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:19:11,853 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:19:12,054 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:19:12,054 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:19:12,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:19:12,054 INFO L82 PathProgramCache]: Analyzing trace with hash 334296516, now seen corresponding path program 44 times [2021-03-11 00:19:12,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:19:12,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077122128] [2021-03-11 00:19:12,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:19:12,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:19:12,138 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:12,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077122128] [2021-03-11 00:19:12,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72429677] [2021-03-11 00:19:12,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:19:12,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:19:12,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:19:12,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-11 00:19:12,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:19:12,502 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:12,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:19:12,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-03-11 00:19:12,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169033530] [2021-03-11 00:19:12,503 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-11 00:19:12,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:19:12,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-11 00:19:12,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:19:12,503 INFO L87 Difference]: Start difference. First operand 16335 states and 63753 transitions. Second operand has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 21 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:13,121 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2021-03-11 00:19:14,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:19:14,866 INFO L93 Difference]: Finished difference Result 32336 states and 117254 transitions. [2021-03-11 00:19:14,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-03-11 00:19:14,867 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 21 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-03-11 00:19:14,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:19:14,938 INFO L225 Difference]: With dead ends: 32336 [2021-03-11 00:19:14,938 INFO L226 Difference]: Without dead ends: 32336 [2021-03-11 00:19:14,939 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1627 ImplicationChecksByTransitivity, 1511.5ms TimeCoverageRelationStatistics Valid=1128, Invalid=3984, Unknown=0, NotChecked=0, Total=5112 [2021-03-11 00:19:14,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32336 states. [2021-03-11 00:19:15,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32336 to 16047. [2021-03-11 00:19:15,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16047 states, 16046 states have (on average 3.864576841580456) internal successors, (62011), 16046 states have internal predecessors, (62011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:15,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16047 states to 16047 states and 62011 transitions. [2021-03-11 00:19:15,462 INFO L78 Accepts]: Start accepts. Automaton has 16047 states and 62011 transitions. Word has length 36 [2021-03-11 00:19:15,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:19:15,462 INFO L480 AbstractCegarLoop]: Abstraction has 16047 states and 62011 transitions. [2021-03-11 00:19:15,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 21 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:15,462 INFO L276 IsEmpty]: Start isEmpty. Operand 16047 states and 62011 transitions. [2021-03-11 00:19:15,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-11 00:19:15,602 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:19:15,602 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:19:15,802 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:19:15,802 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:19:15,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:19:15,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1645233024, now seen corresponding path program 45 times [2021-03-11 00:19:15,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:19:15,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151764433] [2021-03-11 00:19:15,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:19:15,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:19:15,965 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:15,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151764433] [2021-03-11 00:19:15,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263424454] [2021-03-11 00:19:15,965 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:19:16,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-11 00:19:16,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:19:16,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-11 00:19:16,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:19:16,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-11 00:19:16,291 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:16,304 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:19:16,305 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:19:16,306 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:22 [2021-03-11 00:19:16,376 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-03-11 00:19:16,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-03-11 00:19:16,378 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:16,396 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:19:16,398 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-11 00:19:16,399 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:34 [2021-03-11 00:19:16,604 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-03-11 00:19:16,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2021-03-11 00:19:16,607 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:16,640 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:19:16,645 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-11 00:19:16,645 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:49 [2021-03-11 00:19:16,956 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-03-11 00:19:16,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:19:16,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-03-11 00:19:16,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022984387] [2021-03-11 00:19:16,956 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-11 00:19:16,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:19:16,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-11 00:19:16,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-03-11 00:19:16,957 INFO L87 Difference]: Start difference. First operand 16047 states and 62011 transitions. Second operand has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:25,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:19:25,564 INFO L93 Difference]: Finished difference Result 27127 states and 95126 transitions. [2021-03-11 00:19:25,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-03-11 00:19:25,565 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have 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 [2021-03-11 00:19:25,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:19:25,613 INFO L225 Difference]: With dead ends: 27127 [2021-03-11 00:19:25,613 INFO L226 Difference]: Without dead ends: 27112 [2021-03-11 00:19:25,614 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5098 ImplicationChecksByTransitivity, 5361.4ms TimeCoverageRelationStatistics Valid=1942, Invalid=12578, Unknown=0, NotChecked=0, Total=14520 [2021-03-11 00:19:25,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27112 states. [2021-03-11 00:19:25,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27112 to 17257. [2021-03-11 00:19:26,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17257 states, 17256 states have (on average 3.8067918405192396) internal successors, (65690), 17256 states have internal predecessors, (65690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:26,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17257 states to 17257 states and 65690 transitions. [2021-03-11 00:19:26,051 INFO L78 Accepts]: Start accepts. Automaton has 17257 states and 65690 transitions. Word has length 36 [2021-03-11 00:19:26,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:19:26,052 INFO L480 AbstractCegarLoop]: Abstraction has 17257 states and 65690 transitions. [2021-03-11 00:19:26,052 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:26,052 INFO L276 IsEmpty]: Start isEmpty. Operand 17257 states and 65690 transitions. [2021-03-11 00:19:26,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-11 00:19:26,078 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:19:26,078 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:19:26,278 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:19:26,278 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:19:26,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:19:26,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1594356878, now seen corresponding path program 46 times [2021-03-11 00:19:26,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:19:26,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291855825] [2021-03-11 00:19:26,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:19:26,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:19:26,429 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:26,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291855825] [2021-03-11 00:19:26,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536853785] [2021-03-11 00:19:26,429 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:19:26,448 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:19:26,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:19:26,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-11 00:19:26,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:19:26,768 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:19:26,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:19:26,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-11 00:19:26,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639131487] [2021-03-11 00:19:26,769 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-11 00:19:26,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:19:26,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-11 00:19:26,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-03-11 00:19:26,769 INFO L87 Difference]: Start difference. First operand 17257 states and 65690 transitions. Second operand has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:30,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:19:30,963 INFO L93 Difference]: Finished difference Result 32484 states and 115950 transitions. [2021-03-11 00:19:30,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-03-11 00:19:30,964 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-03-11 00:19:30,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:19:31,041 INFO L225 Difference]: With dead ends: 32484 [2021-03-11 00:19:31,042 INFO L226 Difference]: Without dead ends: 32480 [2021-03-11 00:19:31,043 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5050 ImplicationChecksByTransitivity, 2702.3ms TimeCoverageRelationStatistics Valid=2276, Invalid=11766, Unknown=0, NotChecked=0, Total=14042 [2021-03-11 00:19:31,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32480 states. [2021-03-11 00:19:31,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32480 to 16350. [2021-03-11 00:19:31,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16350 states, 16349 states have (on average 3.8502049054988072) internal successors, (62947), 16349 states have internal predecessors, (62947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:31,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16350 states to 16350 states and 62947 transitions. [2021-03-11 00:19:31,565 INFO L78 Accepts]: Start accepts. Automaton has 16350 states and 62947 transitions. Word has length 36 [2021-03-11 00:19:31,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:19:31,565 INFO L480 AbstractCegarLoop]: Abstraction has 16350 states and 62947 transitions. [2021-03-11 00:19:31,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:31,565 INFO L276 IsEmpty]: Start isEmpty. Operand 16350 states and 62947 transitions. [2021-03-11 00:19:31,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-11 00:19:31,589 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:19:31,590 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:19:31,790 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:19:31,790 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:19:31,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:19:31,791 INFO L82 PathProgramCache]: Analyzing trace with hash 649769798, now seen corresponding path program 37 times [2021-03-11 00:19:31,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:19:31,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335361098] [2021-03-11 00:19:31,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:19:31,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:19:31,886 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:31,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335361098] [2021-03-11 00:19:31,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252252685] [2021-03-11 00:19:31,886 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:19:31,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:19:31,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-11 00:19:31,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:19:32,248 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:32,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:19:32,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-03-11 00:19:32,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335246827] [2021-03-11 00:19:32,248 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:19:32,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:19:32,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:19:32,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:19:32,249 INFO L87 Difference]: Start difference. First operand 16350 states and 62947 transitions. Second operand has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:34,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:19:34,648 INFO L93 Difference]: Finished difference Result 33716 states and 119533 transitions. [2021-03-11 00:19:34,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-03-11 00:19:34,648 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-03-11 00:19:34,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:19:34,713 INFO L225 Difference]: With dead ends: 33716 [2021-03-11 00:19:34,714 INFO L226 Difference]: Without dead ends: 33716 [2021-03-11 00:19:34,714 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1978 ImplicationChecksByTransitivity, 1608.8ms TimeCoverageRelationStatistics Valid=1338, Invalid=4514, Unknown=0, NotChecked=0, Total=5852 [2021-03-11 00:19:34,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33716 states. [2021-03-11 00:19:35,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33716 to 16474. [2021-03-11 00:19:35,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16474 states, 16473 states have (on average 3.843076549505251) internal successors, (63307), 16473 states have internal predecessors, (63307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:35,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16474 states to 16474 states and 63307 transitions. [2021-03-11 00:19:35,305 INFO L78 Accepts]: Start accepts. Automaton has 16474 states and 63307 transitions. Word has length 36 [2021-03-11 00:19:35,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:19:35,305 INFO L480 AbstractCegarLoop]: Abstraction has 16474 states and 63307 transitions. [2021-03-11 00:19:35,305 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:35,305 INFO L276 IsEmpty]: Start isEmpty. Operand 16474 states and 63307 transitions. [2021-03-11 00:19:35,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-11 00:19:35,330 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:19:35,330 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:19:35,530 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:19:35,531 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:19:35,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:19:35,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1914163660, now seen corresponding path program 38 times [2021-03-11 00:19:35,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:19:35,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254065669] [2021-03-11 00:19:35,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:19:35,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:19:35,641 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:35,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254065669] [2021-03-11 00:19:35,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788016188] [2021-03-11 00:19:35,642 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:19:35,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:19:35,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:19:35,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-11 00:19:35,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:19:36,040 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:19:36,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:19:36,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-03-11 00:19:36,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038328085] [2021-03-11 00:19:36,041 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-11 00:19:36,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:19:36,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-11 00:19:36,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:19:36,042 INFO L87 Difference]: Start difference. First operand 16474 states and 63307 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 21 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:43,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:19:43,392 INFO L93 Difference]: Finished difference Result 35669 states and 124553 transitions. [2021-03-11 00:19:43,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2021-03-11 00:19:43,394 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 21 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-03-11 00:19:43,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:19:43,571 INFO L225 Difference]: With dead ends: 35669 [2021-03-11 00:19:43,572 INFO L226 Difference]: Without dead ends: 35665 [2021-03-11 00:19:43,573 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12305 ImplicationChecksByTransitivity, 5110.0ms TimeCoverageRelationStatistics Valid=4827, Invalid=25275, Unknown=0, NotChecked=0, Total=30102 [2021-03-11 00:19:43,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35665 states. [2021-03-11 00:19:43,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35665 to 16223. [2021-03-11 00:19:43,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16223 states, 16222 states have (on average 3.7955245962273456) internal successors, (61571), 16222 states have internal predecessors, (61571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:44,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16223 states to 16223 states and 61571 transitions. [2021-03-11 00:19:44,016 INFO L78 Accepts]: Start accepts. Automaton has 16223 states and 61571 transitions. Word has length 36 [2021-03-11 00:19:44,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:19:44,016 INFO L480 AbstractCegarLoop]: Abstraction has 16223 states and 61571 transitions. [2021-03-11 00:19:44,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 21 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:44,016 INFO L276 IsEmpty]: Start isEmpty. Operand 16223 states and 61571 transitions. [2021-03-11 00:19:44,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-11 00:19:44,041 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:19:44,041 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:19:44,241 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-03-11 00:19:44,242 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:19:44,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:19:44,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1955379200, now seen corresponding path program 47 times [2021-03-11 00:19:44,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:19:44,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032174736] [2021-03-11 00:19:44,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:19:44,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:19:44,352 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:19:44,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032174736] [2021-03-11 00:19:44,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338555419] [2021-03-11 00:19:44,352 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:19:44,376 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-11 00:19:44,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:19:44,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-11 00:19:44,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:19:44,733 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:44,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:19:44,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-03-11 00:19:44,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33744980] [2021-03-11 00:19:44,734 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:19:44,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:19:44,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:19:44,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:19:44,734 INFO L87 Difference]: Start difference. First operand 16223 states and 61571 transitions. Second operand has 18 states, 18 states have (on average 3.5) internal successors, (63), 18 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:47,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:19:47,013 INFO L93 Difference]: Finished difference Result 39169 states and 139488 transitions. [2021-03-11 00:19:47,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-03-11 00:19:47,015 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 18 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have 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 [2021-03-11 00:19:47,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:19:47,096 INFO L225 Difference]: With dead ends: 39169 [2021-03-11 00:19:47,096 INFO L226 Difference]: Without dead ends: 39169 [2021-03-11 00:19:47,097 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1334 ImplicationChecksByTransitivity, 1310.1ms TimeCoverageRelationStatistics Valid=1025, Invalid=2757, Unknown=0, NotChecked=0, Total=3782 [2021-03-11 00:19:47,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39169 states. [2021-03-11 00:19:47,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39169 to 16800. [2021-03-11 00:19:47,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16800 states, 16799 states have (on average 3.824037145068159) internal successors, (64240), 16799 states have internal predecessors, (64240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:47,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16800 states to 16800 states and 64240 transitions. [2021-03-11 00:19:47,745 INFO L78 Accepts]: Start accepts. Automaton has 16800 states and 64240 transitions. Word has length 36 [2021-03-11 00:19:47,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:19:47,745 INFO L480 AbstractCegarLoop]: Abstraction has 16800 states and 64240 transitions. [2021-03-11 00:19:47,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 18 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:47,745 INFO L276 IsEmpty]: Start isEmpty. Operand 16800 states and 64240 transitions. [2021-03-11 00:19:47,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-11 00:19:47,769 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:19:47,769 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:19:47,969 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:19:47,969 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:19:47,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:19:47,970 INFO L82 PathProgramCache]: Analyzing trace with hash 835382162, now seen corresponding path program 48 times [2021-03-11 00:19:47,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:19:47,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051214331] [2021-03-11 00:19:47,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:19:47,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:19:48,065 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:48,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051214331] [2021-03-11 00:19:48,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172213402] [2021-03-11 00:19:48,066 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:19:48,087 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-11 00:19:48,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:19:48,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-11 00:19:48,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:19:48,405 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:48,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:19:48,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-03-11 00:19:48,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214861724] [2021-03-11 00:19:48,406 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:19:48,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:19:48,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:19:48,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:19:48,406 INFO L87 Difference]: Start difference. First operand 16800 states and 64240 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:50,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:19:50,129 INFO L93 Difference]: Finished difference Result 33519 states and 119130 transitions. [2021-03-11 00:19:50,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-03-11 00:19:50,131 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-03-11 00:19:50,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:19:50,201 INFO L225 Difference]: With dead ends: 33519 [2021-03-11 00:19:50,201 INFO L226 Difference]: Without dead ends: 33507 [2021-03-11 00:19:50,202 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 945.1ms TimeCoverageRelationStatistics Valid=618, Invalid=1832, Unknown=0, NotChecked=0, Total=2450 [2021-03-11 00:19:50,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33507 states. [2021-03-11 00:19:50,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33507 to 16806. [2021-03-11 00:19:50,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16806 states, 16805 states have (on average 3.823921451948825) internal successors, (64261), 16805 states have internal predecessors, (64261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:50,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16806 states to 16806 states and 64261 transitions. [2021-03-11 00:19:50,864 INFO L78 Accepts]: Start accepts. Automaton has 16806 states and 64261 transitions. Word has length 36 [2021-03-11 00:19:50,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:19:50,864 INFO L480 AbstractCegarLoop]: Abstraction has 16806 states and 64261 transitions. [2021-03-11 00:19:50,864 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:50,865 INFO L276 IsEmpty]: Start isEmpty. Operand 16806 states and 64261 transitions. [2021-03-11 00:19:50,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-11 00:19:50,890 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:19:50,890 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:19:51,091 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-03-11 00:19:51,091 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:19:51,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:19:51,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1105891854, now seen corresponding path program 49 times [2021-03-11 00:19:51,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:19:51,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719583255] [2021-03-11 00:19:51,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:19:51,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:19:51,217 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:51,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719583255] [2021-03-11 00:19:51,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553448977] [2021-03-11 00:19:51,217 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:19:51,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:19:51,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-11 00:19:51,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:19:51,590 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:51,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:19:51,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-03-11 00:19:51,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000515301] [2021-03-11 00:19:51,590 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:19:51,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:19:51,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:19:51,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:19:51,591 INFO L87 Difference]: Start difference. First operand 16806 states and 64261 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:53,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:19:53,593 INFO L93 Difference]: Finished difference Result 34560 states and 122013 transitions. [2021-03-11 00:19:53,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-03-11 00:19:53,595 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-03-11 00:19:53,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:19:53,673 INFO L225 Difference]: With dead ends: 34560 [2021-03-11 00:19:53,674 INFO L226 Difference]: Without dead ends: 34560 [2021-03-11 00:19:53,674 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 929 ImplicationChecksByTransitivity, 1140.5ms TimeCoverageRelationStatistics Valid=726, Invalid=2030, Unknown=0, NotChecked=0, Total=2756 [2021-03-11 00:19:53,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34560 states. [2021-03-11 00:19:54,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34560 to 16446. [2021-03-11 00:19:54,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16446 states, 16445 states have (on average 3.80717543326239) internal successors, (62609), 16445 states have internal predecessors, (62609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:54,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16446 states to 16446 states and 62609 transitions. [2021-03-11 00:19:54,343 INFO L78 Accepts]: Start accepts. Automaton has 16446 states and 62609 transitions. Word has length 36 [2021-03-11 00:19:54,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:19:54,343 INFO L480 AbstractCegarLoop]: Abstraction has 16446 states and 62609 transitions. [2021-03-11 00:19:54,343 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:54,343 INFO L276 IsEmpty]: Start isEmpty. Operand 16446 states and 62609 transitions. [2021-03-11 00:19:54,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-11 00:19:54,373 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:19:54,373 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:19:54,573 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-03-11 00:19:54,573 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:19:54,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:19:54,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1690920040, now seen corresponding path program 50 times [2021-03-11 00:19:54,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:19:54,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490176069] [2021-03-11 00:19:54,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:19:54,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:19:54,693 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:54,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490176069] [2021-03-11 00:19:54,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100487357] [2021-03-11 00:19:54,694 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:19:54,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:19:54,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:19:54,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-11 00:19:54,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:19:55,121 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 23 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-11 00:19:55,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:19:55,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-03-11 00:19:55,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096790734] [2021-03-11 00:19:55,122 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-11 00:19:55,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:19:55,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-11 00:19:55,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:19:55,122 INFO L87 Difference]: Start difference. First operand 16446 states and 62609 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:58,319 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2021-03-11 00:20:03,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:20:03,778 INFO L93 Difference]: Finished difference Result 35901 states and 125560 transitions. [2021-03-11 00:20:03,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2021-03-11 00:20:03,780 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-03-11 00:20:03,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:20:03,849 INFO L225 Difference]: With dead ends: 35901 [2021-03-11 00:20:03,850 INFO L226 Difference]: Without dead ends: 35861 [2021-03-11 00:20:03,851 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12071 ImplicationChecksByTransitivity, 6184.3ms TimeCoverageRelationStatistics Valid=4498, Invalid=24914, Unknown=0, NotChecked=0, Total=29412 [2021-03-11 00:20:03,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35861 states. [2021-03-11 00:20:04,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35861 to 16426. [2021-03-11 00:20:04,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16426 states, 16425 states have (on average 3.805601217656012) internal successors, (62507), 16425 states have internal predecessors, (62507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:04,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16426 states to 16426 states and 62507 transitions. [2021-03-11 00:20:04,316 INFO L78 Accepts]: Start accepts. Automaton has 16426 states and 62507 transitions. Word has length 36 [2021-03-11 00:20:04,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:20:04,316 INFO L480 AbstractCegarLoop]: Abstraction has 16426 states and 62507 transitions. [2021-03-11 00:20:04,316 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:04,316 INFO L276 IsEmpty]: Start isEmpty. Operand 16426 states and 62507 transitions. [2021-03-11 00:20:04,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-11 00:20:04,341 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:20:04,341 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:20:04,541 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:20:04,542 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:20:04,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:20:04,542 INFO L82 PathProgramCache]: Analyzing trace with hash -645736056, now seen corresponding path program 51 times [2021-03-11 00:20:04,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:20:04,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361324616] [2021-03-11 00:20:04,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:20:04,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:20:04,668 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:20:04,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361324616] [2021-03-11 00:20:04,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142244222] [2021-03-11 00:20:04,669 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:20:04,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-11 00:20:04,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:20:04,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-11 00:20:04,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:20:05,180 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:20:05,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:20:05,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-03-11 00:20:05,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466296051] [2021-03-11 00:20:05,180 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:20:05,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:20:05,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:20:05,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:20:05,181 INFO L87 Difference]: Start difference. First operand 16426 states and 62507 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:08,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:20:08,813 INFO L93 Difference]: Finished difference Result 35186 states and 123603 transitions. [2021-03-11 00:20:08,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-03-11 00:20:08,815 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-03-11 00:20:08,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:20:08,884 INFO L225 Difference]: With dead ends: 35186 [2021-03-11 00:20:08,884 INFO L226 Difference]: Without dead ends: 35186 [2021-03-11 00:20:08,885 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1736 ImplicationChecksByTransitivity, 2212.1ms TimeCoverageRelationStatistics Valid=1383, Invalid=4019, Unknown=0, NotChecked=0, Total=5402 [2021-03-11 00:20:08,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35186 states. [2021-03-11 00:20:09,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35186 to 16534. [2021-03-11 00:20:09,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16534 states, 16533 states have (on average 3.8008225972297827) internal successors, (62839), 16533 states have internal predecessors, (62839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:09,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16534 states to 16534 states and 62839 transitions. [2021-03-11 00:20:09,514 INFO L78 Accepts]: Start accepts. Automaton has 16534 states and 62839 transitions. Word has length 36 [2021-03-11 00:20:09,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:20:09,514 INFO L480 AbstractCegarLoop]: Abstraction has 16534 states and 62839 transitions. [2021-03-11 00:20:09,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:09,515 INFO L276 IsEmpty]: Start isEmpty. Operand 16534 states and 62839 transitions. [2021-03-11 00:20:09,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-11 00:20:09,542 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:20:09,542 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:20:09,743 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:20:09,743 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:20:09,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:20:09,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1701113450, now seen corresponding path program 52 times [2021-03-11 00:20:09,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:20:09,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145101235] [2021-03-11 00:20:09,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:20:09,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:20:09,875 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:20:09,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145101235] [2021-03-11 00:20:09,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002230327] [2021-03-11 00:20:09,876 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:20:09,897 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:20:09,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:20:09,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-11 00:20:09,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:20:10,420 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:20:10,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:20:10,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-03-11 00:20:10,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688692491] [2021-03-11 00:20:10,420 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-11 00:20:10,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:20:10,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-11 00:20:10,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:20:10,421 INFO L87 Difference]: Start difference. First operand 16534 states and 62839 transitions. Second operand has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:16,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:20:16,958 INFO L93 Difference]: Finished difference Result 35120 states and 123162 transitions. [2021-03-11 00:20:16,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-03-11 00:20:16,960 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-03-11 00:20:16,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:20:17,038 INFO L225 Difference]: With dead ends: 35120 [2021-03-11 00:20:17,039 INFO L226 Difference]: Without dead ends: 35112 [2021-03-11 00:20:17,040 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5799 ImplicationChecksByTransitivity, 4170.7ms TimeCoverageRelationStatistics Valid=2641, Invalid=12859, Unknown=0, NotChecked=0, Total=15500 [2021-03-11 00:20:17,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35112 states. [2021-03-11 00:20:17,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35112 to 16182. [2021-03-11 00:20:17,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16182 states, 16181 states have (on average 3.788950003090044) internal successors, (61309), 16181 states have internal predecessors, (61309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:17,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16182 states to 16182 states and 61309 transitions. [2021-03-11 00:20:17,546 INFO L78 Accepts]: Start accepts. Automaton has 16182 states and 61309 transitions. Word has length 36 [2021-03-11 00:20:17,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:20:17,546 INFO L480 AbstractCegarLoop]: Abstraction has 16182 states and 61309 transitions. [2021-03-11 00:20:17,546 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:17,546 INFO L276 IsEmpty]: Start isEmpty. Operand 16182 states and 61309 transitions. [2021-03-11 00:20:17,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-11 00:20:17,678 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:20:17,678 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:20:17,878 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:20:17,878 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:20:17,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:20:17,879 INFO L82 PathProgramCache]: Analyzing trace with hash -417474388, now seen corresponding path program 53 times [2021-03-11 00:20:17,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:20:17,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170767469] [2021-03-11 00:20:17,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:20:17,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:20:18,017 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:20:18,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170767469] [2021-03-11 00:20:18,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818869442] [2021-03-11 00:20:18,017 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:20:18,052 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-03-11 00:20:18,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:20:18,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-11 00:20:18,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:20:18,536 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:20:18,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:20:18,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-03-11 00:20:18,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392544106] [2021-03-11 00:20:18,537 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:20:18,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:20:18,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:20:18,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:20:18,537 INFO L87 Difference]: Start difference. First operand 16182 states and 61309 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:23,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:20:23,134 INFO L93 Difference]: Finished difference Result 31424 states and 110398 transitions. [2021-03-11 00:20:23,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-03-11 00:20:23,136 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-03-11 00:20:23,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:20:23,204 INFO L225 Difference]: With dead ends: 31424 [2021-03-11 00:20:23,204 INFO L226 Difference]: Without dead ends: 31372 [2021-03-11 00:20:23,205 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3404 ImplicationChecksByTransitivity, 2981.5ms TimeCoverageRelationStatistics Valid=1989, Invalid=7323, Unknown=0, NotChecked=0, Total=9312 [2021-03-11 00:20:23,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31372 states. [2021-03-11 00:20:23,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31372 to 17011. [2021-03-11 00:20:23,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17011 states, 17010 states have (on average 3.7483245149911815) internal successors, (63759), 17010 states have internal predecessors, (63759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:23,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17011 states to 17011 states and 63759 transitions. [2021-03-11 00:20:23,726 INFO L78 Accepts]: Start accepts. Automaton has 17011 states and 63759 transitions. Word has length 36 [2021-03-11 00:20:23,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:20:23,727 INFO L480 AbstractCegarLoop]: Abstraction has 17011 states and 63759 transitions. [2021-03-11 00:20:23,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:23,727 INFO L276 IsEmpty]: Start isEmpty. Operand 17011 states and 63759 transitions. [2021-03-11 00:20:23,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-11 00:20:23,752 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:20:23,753 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:20:23,953 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable92 [2021-03-11 00:20:23,953 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:20:23,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:20:23,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1328456694, now seen corresponding path program 54 times [2021-03-11 00:20:23,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:20:23,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612317007] [2021-03-11 00:20:23,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:20:23,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:20:24,089 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:20:24,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612317007] [2021-03-11 00:20:24,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108948860] [2021-03-11 00:20:24,090 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:20:24,110 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-11 00:20:24,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:20:24,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-11 00:20:24,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:20:24,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-11 00:20:24,478 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:24,504 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:20:24,508 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-11 00:20:24,508 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:27 [2021-03-11 00:20:24,641 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-03-11 00:20:24,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-03-11 00:20:24,645 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:24,673 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:20:24,690 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-11 00:20:24,690 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:40, output treesize:39 [2021-03-11 00:20:24,878 INFO L354 Elim1Store]: treesize reduction 52, result has 17.5 percent of original size [2021-03-11 00:20:24,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 32 [2021-03-11 00:20:24,882 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:24,918 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:20:24,929 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-11 00:20:24,930 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:51, output treesize:50 [2021-03-11 00:20:25,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:20:25,236 INFO L354 Elim1Store]: treesize reduction 60, result has 15.5 percent of original size [2021-03-11 00:20:25,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 42 [2021-03-11 00:20:25,240 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:25,288 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:20:25,301 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-03-11 00:20:25,301 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:66, output treesize:65 [2021-03-11 00:20:25,887 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-11 00:20:25,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:20:25,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 24 [2021-03-11 00:20:25,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283740772] [2021-03-11 00:20:25,888 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-11 00:20:25,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:20:25,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-11 00:20:25,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-03-11 00:20:25,888 INFO L87 Difference]: Start difference. First operand 17011 states and 63759 transitions. Second operand has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:28,319 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2021-03-11 00:20:29,937 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-03-11 00:20:35,873 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-03-11 00:20:36,607 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2021-03-11 00:20:37,168 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-03-11 00:20:38,620 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-03-11 00:20:39,135 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-03-11 00:20:39,378 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-03-11 00:20:39,576 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-03-11 00:20:39,908 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2021-03-11 00:20:40,795 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-03-11 00:20:41,035 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-03-11 00:20:41,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:20:41,440 INFO L93 Difference]: Finished difference Result 26494 states and 92613 transitions. [2021-03-11 00:20:41,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-03-11 00:20:41,443 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-03-11 00:20:41,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:20:41,499 INFO L225 Difference]: With dead ends: 26494 [2021-03-11 00:20:41,499 INFO L226 Difference]: Without dead ends: 26358 [2021-03-11 00:20:41,500 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5946 ImplicationChecksByTransitivity, 10270.0ms TimeCoverageRelationStatistics Valid=2000, Invalid=14256, Unknown=0, NotChecked=0, Total=16256 [2021-03-11 00:20:41,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26358 states. [2021-03-11 00:20:41,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26358 to 17294. [2021-03-11 00:20:41,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17294 states, 17293 states have (on average 3.735442086393338) internal successors, (64597), 17293 states have internal predecessors, (64597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:41,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17294 states to 17294 states and 64597 transitions. [2021-03-11 00:20:41,979 INFO L78 Accepts]: Start accepts. Automaton has 17294 states and 64597 transitions. Word has length 36 [2021-03-11 00:20:41,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:20:41,979 INFO L480 AbstractCegarLoop]: Abstraction has 17294 states and 64597 transitions. [2021-03-11 00:20:41,979 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:41,979 INFO L276 IsEmpty]: Start isEmpty. Operand 17294 states and 64597 transitions. [2021-03-11 00:20:42,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-11 00:20:42,005 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:20:42,005 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:20:42,205 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:20:42,205 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:20:42,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:20:42,206 INFO L82 PathProgramCache]: Analyzing trace with hash -757061290, now seen corresponding path program 55 times [2021-03-11 00:20:42,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:20:42,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241827483] [2021-03-11 00:20:42,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:20:42,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:20:42,353 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:20:42,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241827483] [2021-03-11 00:20:42,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130533560] [2021-03-11 00:20:42,354 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:20:42,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:20:42,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-11 00:20:42,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:20:42,923 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-11 00:20:42,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:20:42,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-03-11 00:20:42,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784376218] [2021-03-11 00:20:42,923 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:20:42,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:20:42,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:20:42,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:20:42,924 INFO L87 Difference]: Start difference. First operand 17294 states and 64597 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:48,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:20:48,313 INFO L93 Difference]: Finished difference Result 32283 states and 115167 transitions. [2021-03-11 00:20:48,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-03-11 00:20:48,315 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-03-11 00:20:48,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:20:48,382 INFO L225 Difference]: With dead ends: 32283 [2021-03-11 00:20:48,382 INFO L226 Difference]: Without dead ends: 32267 [2021-03-11 00:20:48,383 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4171 ImplicationChecksByTransitivity, 3536.1ms TimeCoverageRelationStatistics Valid=2031, Invalid=9311, Unknown=0, NotChecked=0, Total=11342 [2021-03-11 00:20:48,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32267 states. [2021-03-11 00:20:48,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32267 to 17372. [2021-03-11 00:20:48,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17372 states, 17371 states have (on average 3.7320822059754764) internal successors, (64830), 17371 states have internal predecessors, (64830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:48,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17372 states to 17372 states and 64830 transitions. [2021-03-11 00:20:48,981 INFO L78 Accepts]: Start accepts. Automaton has 17372 states and 64830 transitions. Word has length 36 [2021-03-11 00:20:48,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:20:48,982 INFO L480 AbstractCegarLoop]: Abstraction has 17372 states and 64830 transitions. [2021-03-11 00:20:48,982 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:48,982 INFO L276 IsEmpty]: Start isEmpty. Operand 17372 states and 64830 transitions. [2021-03-11 00:20:49,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-11 00:20:49,010 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:20:49,010 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:20:49,210 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-03-11 00:20:49,210 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:20:49,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:20:49,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1893700292, now seen corresponding path program 39 times [2021-03-11 00:20:49,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:20:49,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468057097] [2021-03-11 00:20:49,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:20:49,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:20:49,363 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:20:49,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468057097] [2021-03-11 00:20:49,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591326658] [2021-03-11 00:20:49,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:20:49,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-11 00:20:49,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:20:49,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-11 00:20:49,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:20:49,879 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:20:49,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:20:49,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 18 [2021-03-11 00:20:49,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255631799] [2021-03-11 00:20:49,880 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:20:49,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:20:49,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:20:49,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:20:49,880 INFO L87 Difference]: Start difference. First operand 17372 states and 64830 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:55,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:20:55,128 INFO L93 Difference]: Finished difference Result 32268 states and 114944 transitions. [2021-03-11 00:20:55,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-03-11 00:20:55,130 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-03-11 00:20:55,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:20:55,198 INFO L225 Difference]: With dead ends: 32268 [2021-03-11 00:20:55,198 INFO L226 Difference]: Without dead ends: 32240 [2021-03-11 00:20:55,199 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4232 ImplicationChecksByTransitivity, 3403.4ms TimeCoverageRelationStatistics Valid=2122, Invalid=9220, Unknown=0, NotChecked=0, Total=11342 [2021-03-11 00:20:55,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32240 states. [2021-03-11 00:20:55,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32240 to 17860. [2021-03-11 00:20:55,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17860 states, 17859 states have (on average 3.705694607760793) internal successors, (66180), 17859 states have internal predecessors, (66180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:55,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17860 states to 17860 states and 66180 transitions. [2021-03-11 00:20:55,636 INFO L78 Accepts]: Start accepts. Automaton has 17860 states and 66180 transitions. Word has length 36 [2021-03-11 00:20:55,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:20:55,636 INFO L480 AbstractCegarLoop]: Abstraction has 17860 states and 66180 transitions. [2021-03-11 00:20:55,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:55,636 INFO L276 IsEmpty]: Start isEmpty. Operand 17860 states and 66180 transitions. [2021-03-11 00:20:55,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-11 00:20:55,664 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:20:55,664 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:20:55,885 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:20:55,885 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:20:55,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:20:55,885 INFO L82 PathProgramCache]: Analyzing trace with hash -501007420, now seen corresponding path program 40 times [2021-03-11 00:20:55,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:20:55,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268350986] [2021-03-11 00:20:55,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:20:55,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:20:56,018 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:20:56,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268350986] [2021-03-11 00:20:56,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693263383] [2021-03-11 00:20:56,018 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:20:56,046 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:20:56,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:20:56,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-11 00:20:56,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:20:56,562 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:20:56,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:20:56,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-03-11 00:20:56,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304281190] [2021-03-11 00:20:56,563 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:20:56,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:20:56,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:20:56,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:20:56,563 INFO L87 Difference]: Start difference. First operand 17860 states and 66180 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:59,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:20:59,659 INFO L93 Difference]: Finished difference Result 31675 states and 112625 transitions. [2021-03-11 00:20:59,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-03-11 00:20:59,662 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-03-11 00:20:59,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:20:59,750 INFO L225 Difference]: With dead ends: 31675 [2021-03-11 00:20:59,751 INFO L226 Difference]: Without dead ends: 31675 [2021-03-11 00:20:59,751 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1383 ImplicationChecksByTransitivity, 1803.6ms TimeCoverageRelationStatistics Valid=939, Invalid=3093, Unknown=0, NotChecked=0, Total=4032 [2021-03-11 00:20:59,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31675 states. [2021-03-11 00:21:00,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31675 to 17736. [2021-03-11 00:21:00,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17736 states, 17735 states have (on average 3.711192557090499) internal successors, (65818), 17735 states have internal predecessors, (65818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:00,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17736 states to 17736 states and 65818 transitions. [2021-03-11 00:21:00,160 INFO L78 Accepts]: Start accepts. Automaton has 17736 states and 65818 transitions. Word has length 36 [2021-03-11 00:21:00,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:21:00,160 INFO L480 AbstractCegarLoop]: Abstraction has 17736 states and 65818 transitions. [2021-03-11 00:21:00,160 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:00,160 INFO L276 IsEmpty]: Start isEmpty. Operand 17736 states and 65818 transitions. [2021-03-11 00:21:00,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-11 00:21:00,186 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:21:00,186 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:21:00,386 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:21:00,386 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:21:00,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:21:00,386 INFO L82 PathProgramCache]: Analyzing trace with hash 14650632, now seen corresponding path program 56 times [2021-03-11 00:21:00,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:21:00,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387518956] [2021-03-11 00:21:00,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:21:00,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:21:00,597 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:21:00,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387518956] [2021-03-11 00:21:00,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612102903] [2021-03-11 00:21:00,597 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:21:00,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:21:00,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:21:00,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-11 00:21:00,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:21:01,273 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-11 00:21:01,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:21:01,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-03-11 00:21:01,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213577961] [2021-03-11 00:21:01,274 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:21:01,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:21:01,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:21:01,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:21:01,274 INFO L87 Difference]: Start difference. First operand 17736 states and 65818 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:09,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:21:09,364 INFO L93 Difference]: Finished difference Result 37470 states and 128076 transitions. [2021-03-11 00:21:09,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2021-03-11 00:21:09,367 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-03-11 00:21:09,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:21:09,447 INFO L225 Difference]: With dead ends: 37470 [2021-03-11 00:21:09,447 INFO L226 Difference]: Without dead ends: 37470 [2021-03-11 00:21:09,449 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7845 ImplicationChecksByTransitivity, 5716.3ms TimeCoverageRelationStatistics Valid=3923, Invalid=15259, Unknown=0, NotChecked=0, Total=19182 [2021-03-11 00:21:09,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37470 states. [2021-03-11 00:21:09,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37470 to 17361. [2021-03-11 00:21:09,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17361 states, 17360 states have (on average 3.7517857142857145) internal successors, (65131), 17360 states have internal predecessors, (65131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:09,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17361 states to 17361 states and 65131 transitions. [2021-03-11 00:21:09,957 INFO L78 Accepts]: Start accepts. Automaton has 17361 states and 65131 transitions. Word has length 36 [2021-03-11 00:21:09,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:21:09,957 INFO L480 AbstractCegarLoop]: Abstraction has 17361 states and 65131 transitions. [2021-03-11 00:21:09,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:09,957 INFO L276 IsEmpty]: Start isEmpty. Operand 17361 states and 65131 transitions. [2021-03-11 00:21:09,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-11 00:21:09,984 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:21:09,984 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:21:10,184 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-03-11 00:21:10,184 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:21:10,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:21:10,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1670020454, now seen corresponding path program 57 times [2021-03-11 00:21:10,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:21:10,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299599240] [2021-03-11 00:21:10,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:21:10,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:21:10,388 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:21:10,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299599240] [2021-03-11 00:21:10,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856771383] [2021-03-11 00:21:10,388 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:21:10,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-03-11 00:21:10,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:21:10,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-11 00:21:10,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:21:10,963 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:21:10,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:21:10,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-03-11 00:21:10,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87650038] [2021-03-11 00:21:10,963 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:21:10,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:21:10,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:21:10,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:21:10,964 INFO L87 Difference]: Start difference. First operand 17361 states and 65131 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:16,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:21:16,934 INFO L93 Difference]: Finished difference Result 34675 states and 119928 transitions. [2021-03-11 00:21:16,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-03-11 00:21:16,937 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-03-11 00:21:16,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:21:17,014 INFO L225 Difference]: With dead ends: 34675 [2021-03-11 00:21:17,014 INFO L226 Difference]: Without dead ends: 34599 [2021-03-11 00:21:17,015 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4225 ImplicationChecksByTransitivity, 4003.3ms TimeCoverageRelationStatistics Valid=2296, Invalid=8834, Unknown=0, NotChecked=0, Total=11130 [2021-03-11 00:21:17,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34599 states. [2021-03-11 00:21:17,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34599 to 16908. [2021-03-11 00:21:17,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16908 states, 16907 states have (on average 3.7340746436387295) internal successors, (63132), 16907 states have internal predecessors, (63132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:17,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16908 states to 16908 states and 63132 transitions. [2021-03-11 00:21:17,541 INFO L78 Accepts]: Start accepts. Automaton has 16908 states and 63132 transitions. Word has length 36 [2021-03-11 00:21:17,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:21:17,541 INFO L480 AbstractCegarLoop]: Abstraction has 16908 states and 63132 transitions. [2021-03-11 00:21:17,541 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:17,541 INFO L276 IsEmpty]: Start isEmpty. Operand 16908 states and 63132 transitions. [2021-03-11 00:21:17,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-11 00:21:17,570 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:21:17,570 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:21:17,771 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:21:17,771 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:21:17,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:21:17,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1988479988, now seen corresponding path program 58 times [2021-03-11 00:21:17,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:21:17,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031368710] [2021-03-11 00:21:17,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:21:17,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:21:17,926 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:21:17,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031368710] [2021-03-11 00:21:17,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393698973] [2021-03-11 00:21:17,926 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:21:17,947 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:21:17,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:21:17,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-11 00:21:17,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:21:18,402 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-11 00:21:18,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:21:18,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-03-11 00:21:18,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089682849] [2021-03-11 00:21:18,402 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:21:18,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:21:18,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:21:18,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:21:18,403 INFO L87 Difference]: Start difference. First operand 16908 states and 63132 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:23,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:21:23,705 INFO L93 Difference]: Finished difference Result 31762 states and 110839 transitions. [2021-03-11 00:21:23,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-03-11 00:21:23,707 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-03-11 00:21:23,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:21:23,772 INFO L225 Difference]: With dead ends: 31762 [2021-03-11 00:21:23,772 INFO L226 Difference]: Without dead ends: 31690 [2021-03-11 00:21:23,773 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2632 ImplicationChecksByTransitivity, 3177.3ms TimeCoverageRelationStatistics Valid=1504, Invalid=5978, Unknown=0, NotChecked=0, Total=7482 [2021-03-11 00:21:23,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31690 states. [2021-03-11 00:21:24,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31690 to 16908. [2021-03-11 00:21:24,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16908 states, 16907 states have (on average 3.7340746436387295) internal successors, (63132), 16907 states have internal predecessors, (63132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:24,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16908 states to 16908 states and 63132 transitions. [2021-03-11 00:21:24,353 INFO L78 Accepts]: Start accepts. Automaton has 16908 states and 63132 transitions. Word has length 36 [2021-03-11 00:21:24,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:21:24,353 INFO L480 AbstractCegarLoop]: Abstraction has 16908 states and 63132 transitions. [2021-03-11 00:21:24,353 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:24,353 INFO L276 IsEmpty]: Start isEmpty. Operand 16908 states and 63132 transitions. [2021-03-11 00:21:24,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-11 00:21:24,383 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:21:24,383 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:21:24,583 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:21:24,584 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:21:24,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:21:24,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1230140076, now seen corresponding path program 59 times [2021-03-11 00:21:24,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:21:24,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874674328] [2021-03-11 00:21:24,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:21:24,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:21:24,762 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:21:24,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874674328] [2021-03-11 00:21:24,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021673635] [2021-03-11 00:21:24,763 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:21:24,785 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-11 00:21:24,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:21:24,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-11 00:21:24,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:21:25,366 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-11 00:21:25,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:21:25,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-03-11 00:21:25,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636868915] [2021-03-11 00:21:25,367 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:21:25,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:21:25,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:21:25,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:21:25,368 INFO L87 Difference]: Start difference. First operand 16908 states and 63132 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:35,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:21:35,642 INFO L93 Difference]: Finished difference Result 37416 states and 126890 transitions. [2021-03-11 00:21:35,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2021-03-11 00:21:35,646 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-03-11 00:21:35,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:21:35,729 INFO L225 Difference]: With dead ends: 37416 [2021-03-11 00:21:35,729 INFO L226 Difference]: Without dead ends: 37344 [2021-03-11 00:21:35,731 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11555 ImplicationChecksByTransitivity, 7739.1ms TimeCoverageRelationStatistics Valid=4716, Invalid=23006, Unknown=0, NotChecked=0, Total=27722 [2021-03-11 00:21:35,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37344 states. [2021-03-11 00:21:36,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37344 to 16945. [2021-03-11 00:21:36,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16945 states, 16944 states have (on average 3.7370160528800755) internal successors, (63320), 16944 states have internal predecessors, (63320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:36,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16945 states to 16945 states and 63320 transitions. [2021-03-11 00:21:36,264 INFO L78 Accepts]: Start accepts. Automaton has 16945 states and 63320 transitions. Word has length 36 [2021-03-11 00:21:36,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:21:36,264 INFO L480 AbstractCegarLoop]: Abstraction has 16945 states and 63320 transitions. [2021-03-11 00:21:36,264 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:36,264 INFO L276 IsEmpty]: Start isEmpty. Operand 16945 states and 63320 transitions. [2021-03-11 00:21:36,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-11 00:21:36,288 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:21:36,288 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:21:36,489 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-03-11 00:21:36,489 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:21:36,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:21:36,489 INFO L82 PathProgramCache]: Analyzing trace with hash -2017838672, now seen corresponding path program 60 times [2021-03-11 00:21:36,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:21:36,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247295740] [2021-03-11 00:21:36,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:21:36,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:21:36,697 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:21:36,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247295740] [2021-03-11 00:21:36,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692098285] [2021-03-11 00:21:36,697 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:21:36,718 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-11 00:21:36,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:21:36,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-11 00:21:36,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:21:37,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-03-11 00:21:37,410 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:21:37,429 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:21:37,432 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:21:37,432 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:21 [2021-03-11 00:21:37,560 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-03-11 00:21:37,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2021-03-11 00:21:37,564 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:21:37,589 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:21:37,591 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:21:37,591 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-03-11 00:21:37,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:21:37,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:21:37,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:21:37,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 36 [2021-03-11 00:21:37,809 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:21:37,845 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:21:37,850 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-11 00:21:37,850 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:47 [2021-03-11 00:21:38,248 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-11 00:21:38,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:21:38,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-03-11 00:21:38,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378575348] [2021-03-11 00:21:38,249 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-03-11 00:21:38,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:21:38,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-03-11 00:21:38,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-03-11 00:21:38,250 INFO L87 Difference]: Start difference. First operand 16945 states and 63320 transitions. Second operand has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 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) [2021-03-11 00:21:51,771 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2021-03-11 00:21:52,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:21:52,809 INFO L93 Difference]: Finished difference Result 33786 states and 113936 transitions. [2021-03-11 00:21:52,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2021-03-11 00:21:52,813 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 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 36 [2021-03-11 00:21:52,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:21:52,902 INFO L225 Difference]: With dead ends: 33786 [2021-03-11 00:21:52,902 INFO L226 Difference]: Without dead ends: 33559 [2021-03-11 00:21:52,906 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13670 ImplicationChecksByTransitivity, 11658.6ms TimeCoverageRelationStatistics Valid=4013, Invalid=29293, Unknown=0, NotChecked=0, Total=33306 [2021-03-11 00:21:52,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33559 states. [2021-03-11 00:21:53,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33559 to 17006. [2021-03-11 00:21:53,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17006 states, 17005 states have (on average 3.7364892678623933) internal successors, (63539), 17005 states have internal predecessors, (63539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:53,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17006 states to 17006 states and 63539 transitions. [2021-03-11 00:21:53,403 INFO L78 Accepts]: Start accepts. Automaton has 17006 states and 63539 transitions. Word has length 36 [2021-03-11 00:21:53,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:21:53,403 INFO L480 AbstractCegarLoop]: Abstraction has 17006 states and 63539 transitions. [2021-03-11 00:21:53,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 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) [2021-03-11 00:21:53,403 INFO L276 IsEmpty]: Start isEmpty. Operand 17006 states and 63539 transitions. [2021-03-11 00:21:53,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-11 00:21:53,430 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:21:53,430 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:21:53,630 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-03-11 00:21:53,631 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:21:53,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:21:53,631 INFO L82 PathProgramCache]: Analyzing trace with hash -545537740, now seen corresponding path program 61 times [2021-03-11 00:21:53,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:21:53,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949991213] [2021-03-11 00:21:53,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:21:53,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:21:53,982 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:21:53,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949991213] [2021-03-11 00:21:53,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442759368] [2021-03-11 00:21:53,982 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:21:54,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:21:54,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-11 00:21:54,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:21:54,461 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:21:54,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:21:54,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-03-11 00:21:54,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800703857] [2021-03-11 00:21:54,462 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:21:54,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:21:54,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:21:54,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:21:54,462 INFO L87 Difference]: Start difference. First operand 17006 states and 63539 transitions. Second operand has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:01,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:01,316 INFO L93 Difference]: Finished difference Result 35615 states and 121342 transitions. [2021-03-11 00:22:01,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-03-11 00:22:01,320 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-03-11 00:22:01,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:01,402 INFO L225 Difference]: With dead ends: 35615 [2021-03-11 00:22:01,402 INFO L226 Difference]: Without dead ends: 35599 [2021-03-11 00:22:01,404 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5684 ImplicationChecksByTransitivity, 4913.7ms TimeCoverageRelationStatistics Valid=2727, Invalid=11315, Unknown=0, NotChecked=0, Total=14042 [2021-03-11 00:22:01,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35599 states. [2021-03-11 00:22:01,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35599 to 14776. [2021-03-11 00:22:01,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14776 states, 14775 states have (on average 3.6406768189509306) internal successors, (53791), 14775 states have internal predecessors, (53791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:01,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14776 states to 14776 states and 53791 transitions. [2021-03-11 00:22:01,903 INFO L78 Accepts]: Start accepts. Automaton has 14776 states and 53791 transitions. Word has length 36 [2021-03-11 00:22:01,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:01,903 INFO L480 AbstractCegarLoop]: Abstraction has 14776 states and 53791 transitions. [2021-03-11 00:22:01,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:01,903 INFO L276 IsEmpty]: Start isEmpty. Operand 14776 states and 53791 transitions. [2021-03-11 00:22:01,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-11 00:22:01,927 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:01,927 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:02,143 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-03-11 00:22:02,143 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:02,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:02,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1278156332, now seen corresponding path program 62 times [2021-03-11 00:22:02,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:02,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214218097] [2021-03-11 00:22:02,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:02,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:02,398 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:02,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214218097] [2021-03-11 00:22:02,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944372068] [2021-03-11 00:22:02,398 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:02,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:22:02,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:02,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-11 00:22:02,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:03,030 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-11 00:22:03,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:03,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-03-11 00:22:03,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835660102] [2021-03-11 00:22:03,031 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:22:03,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:03,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:22:03,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:22:03,031 INFO L87 Difference]: Start difference. First operand 14776 states and 53791 transitions. Second operand has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:09,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:09,122 INFO L93 Difference]: Finished difference Result 28666 states and 99293 transitions. [2021-03-11 00:22:09,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-03-11 00:22:09,126 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-03-11 00:22:09,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:09,192 INFO L225 Difference]: With dead ends: 28666 [2021-03-11 00:22:09,192 INFO L226 Difference]: Without dead ends: 28606 [2021-03-11 00:22:09,193 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3397 ImplicationChecksByTransitivity, 3930.8ms TimeCoverageRelationStatistics Valid=1828, Invalid=7484, Unknown=0, NotChecked=0, Total=9312 [2021-03-11 00:22:09,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28606 states. [2021-03-11 00:22:09,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28606 to 15108. [2021-03-11 00:22:09,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15108 states, 15107 states have (on average 3.6251406632686836) internal successors, (54765), 15107 states have internal predecessors, (54765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:09,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15108 states to 15108 states and 54765 transitions. [2021-03-11 00:22:09,676 INFO L78 Accepts]: Start accepts. Automaton has 15108 states and 54765 transitions. Word has length 36 [2021-03-11 00:22:09,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:09,676 INFO L480 AbstractCegarLoop]: Abstraction has 15108 states and 54765 transitions. [2021-03-11 00:22:09,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:09,676 INFO L276 IsEmpty]: Start isEmpty. Operand 15108 states and 54765 transitions. [2021-03-11 00:22:09,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-11 00:22:09,700 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:09,700 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:09,900 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-03-11 00:22:09,900 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:09,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:09,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1851612882, now seen corresponding path program 63 times [2021-03-11 00:22:09,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:09,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287394093] [2021-03-11 00:22:09,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:09,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:10,105 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:22:10,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287394093] [2021-03-11 00:22:10,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421216047] [2021-03-11 00:22:10,106 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:10,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-03-11 00:22:10,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:10,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-11 00:22:10,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:10,824 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:22:10,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:10,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-03-11 00:22:10,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268708741] [2021-03-11 00:22:10,824 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:22:10,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:10,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:22:10,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:22:10,825 INFO L87 Difference]: Start difference. First operand 15108 states and 54765 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:15,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:15,182 INFO L93 Difference]: Finished difference Result 25993 states and 91048 transitions. [2021-03-11 00:22:15,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-03-11 00:22:15,185 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-03-11 00:22:15,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:15,234 INFO L225 Difference]: With dead ends: 25993 [2021-03-11 00:22:15,234 INFO L226 Difference]: Without dead ends: 25981 [2021-03-11 00:22:15,235 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1971 ImplicationChecksByTransitivity, 3018.3ms TimeCoverageRelationStatistics Valid=1112, Invalid=4588, Unknown=0, NotChecked=0, Total=5700 [2021-03-11 00:22:15,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25981 states. [2021-03-11 00:22:15,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25981 to 15395. [2021-03-11 00:22:15,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15395 states, 15394 states have (on average 3.624204235416396) internal successors, (55791), 15394 states have internal predecessors, (55791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:15,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15395 states to 15395 states and 55791 transitions. [2021-03-11 00:22:15,588 INFO L78 Accepts]: Start accepts. Automaton has 15395 states and 55791 transitions. Word has length 36 [2021-03-11 00:22:15,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:15,588 INFO L480 AbstractCegarLoop]: Abstraction has 15395 states and 55791 transitions. [2021-03-11 00:22:15,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:15,589 INFO L276 IsEmpty]: Start isEmpty. Operand 15395 states and 55791 transitions. [2021-03-11 00:22:15,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-11 00:22:15,612 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:15,612 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:15,812 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-03-11 00:22:15,813 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:15,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:15,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1215146028, now seen corresponding path program 64 times [2021-03-11 00:22:15,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:15,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537058883] [2021-03-11 00:22:15,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:15,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:16,046 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:16,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537058883] [2021-03-11 00:22:16,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157532244] [2021-03-11 00:22:16,046 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:16,069 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:22:16,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:16,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-11 00:22:16,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:16,768 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-11 00:22:16,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:16,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-03-11 00:22:16,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559227547] [2021-03-11 00:22:16,769 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:22:16,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:16,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:22:16,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:22:16,770 INFO L87 Difference]: Start difference. First operand 15395 states and 55791 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:21,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:21,416 INFO L93 Difference]: Finished difference Result 25873 states and 90773 transitions. [2021-03-11 00:22:21,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-03-11 00:22:21,419 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-03-11 00:22:21,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:21,468 INFO L225 Difference]: With dead ends: 25873 [2021-03-11 00:22:21,469 INFO L226 Difference]: Without dead ends: 25837 [2021-03-11 00:22:21,469 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2131 ImplicationChecksByTransitivity, 3197.0ms TimeCoverageRelationStatistics Valid=1218, Invalid=4944, Unknown=0, NotChecked=0, Total=6162 [2021-03-11 00:22:21,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25837 states. [2021-03-11 00:22:21,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25837 to 15395. [2021-03-11 00:22:21,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15395 states, 15394 states have (on average 3.623684552423022) internal successors, (55783), 15394 states have internal predecessors, (55783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:21,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15395 states to 15395 states and 55783 transitions. [2021-03-11 00:22:21,845 INFO L78 Accepts]: Start accepts. Automaton has 15395 states and 55783 transitions. Word has length 36 [2021-03-11 00:22:21,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:21,845 INFO L480 AbstractCegarLoop]: Abstraction has 15395 states and 55783 transitions. [2021-03-11 00:22:21,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:21,845 INFO L276 IsEmpty]: Start isEmpty. Operand 15395 states and 55783 transitions. [2021-03-11 00:22:21,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-11 00:22:21,870 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:21,870 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:22,071 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-03-11 00:22:22,071 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:22,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:22,071 INFO L82 PathProgramCache]: Analyzing trace with hash 853501382, now seen corresponding path program 65 times [2021-03-11 00:22:22,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:22,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778164216] [2021-03-11 00:22:22,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:22,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:22,266 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-11 00:22:22,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778164216] [2021-03-11 00:22:22,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756385635] [2021-03-11 00:22:22,266 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:22,289 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-11 00:22:22,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:22,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-11 00:22:22,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:23,060 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:22:23,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:23,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-03-11 00:22:23,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171745415] [2021-03-11 00:22:23,061 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:22:23,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:23,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:22:23,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:22:23,061 INFO L87 Difference]: Start difference. First operand 15395 states and 55783 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:31,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:31,182 INFO L93 Difference]: Finished difference Result 33384 states and 114382 transitions. [2021-03-11 00:22:31,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-03-11 00:22:31,186 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-03-11 00:22:31,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:31,267 INFO L225 Difference]: With dead ends: 33384 [2021-03-11 00:22:31,267 INFO L226 Difference]: Without dead ends: 33380 [2021-03-11 00:22:31,269 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4569 ImplicationChecksByTransitivity, 5496.3ms TimeCoverageRelationStatistics Valid=2345, Invalid=10087, Unknown=0, NotChecked=0, Total=12432 [2021-03-11 00:22:31,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33380 states. [2021-03-11 00:22:31,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33380 to 15788. [2021-03-11 00:22:31,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15788 states, 15787 states have (on average 3.6173433837967948) internal successors, (57107), 15787 states have internal predecessors, (57107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:31,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15788 states to 15788 states and 57107 transitions. [2021-03-11 00:22:31,719 INFO L78 Accepts]: Start accepts. Automaton has 15788 states and 57107 transitions. Word has length 36 [2021-03-11 00:22:31,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:31,719 INFO L480 AbstractCegarLoop]: Abstraction has 15788 states and 57107 transitions. [2021-03-11 00:22:31,719 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:31,719 INFO L276 IsEmpty]: Start isEmpty. Operand 15788 states and 57107 transitions. [2021-03-11 00:22:31,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-11 00:22:31,741 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:31,741 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:31,943 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-03-11 00:22:31,943 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:31,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:31,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1819802944, now seen corresponding path program 41 times [2021-03-11 00:22:31,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:31,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145560613] [2021-03-11 00:22:31,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:31,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:32,127 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-11 00:22:32,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145560613] [2021-03-11 00:22:32,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646562447] [2021-03-11 00:22:32,128 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:32,149 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-11 00:22:32,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:32,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-11 00:22:32,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:32,929 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:32,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:32,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 19 [2021-03-11 00:22:32,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126262910] [2021-03-11 00:22:32,929 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:22:32,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:32,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:22:32,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:22:32,930 INFO L87 Difference]: Start difference. First operand 15788 states and 57107 transitions. Second operand has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:37,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:37,228 INFO L93 Difference]: Finished difference Result 36361 states and 126346 transitions. [2021-03-11 00:22:37,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-03-11 00:22:37,231 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-03-11 00:22:37,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:37,315 INFO L225 Difference]: With dead ends: 36361 [2021-03-11 00:22:37,315 INFO L226 Difference]: Without dead ends: 36361 [2021-03-11 00:22:37,315 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1059 ImplicationChecksByTransitivity, 2711.5ms TimeCoverageRelationStatistics Valid=957, Invalid=2583, Unknown=0, NotChecked=0, Total=3540 [2021-03-11 00:22:37,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36361 states. [2021-03-11 00:22:37,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36361 to 16736. [2021-03-11 00:22:37,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16736 states, 16735 states have (on average 3.671765760382432) internal successors, (61447), 16735 states have internal predecessors, (61447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:37,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16736 states to 16736 states and 61447 transitions. [2021-03-11 00:22:37,826 INFO L78 Accepts]: Start accepts. Automaton has 16736 states and 61447 transitions. Word has length 36 [2021-03-11 00:22:37,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:37,827 INFO L480 AbstractCegarLoop]: Abstraction has 16736 states and 61447 transitions. [2021-03-11 00:22:37,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:37,827 INFO L276 IsEmpty]: Start isEmpty. Operand 16736 states and 61447 transitions. [2021-03-11 00:22:37,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-11 00:22:37,853 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:37,853 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:38,053 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:38,054 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:38,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:38,054 INFO L82 PathProgramCache]: Analyzing trace with hash 512328654, now seen corresponding path program 42 times [2021-03-11 00:22:38,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:38,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404767995] [2021-03-11 00:22:38,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:38,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:38,234 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-11 00:22:38,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404767995] [2021-03-11 00:22:38,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934307597] [2021-03-11 00:22:38,235 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:38,256 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-11 00:22:38,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:38,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-11 00:22:38,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:38,940 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:38,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:38,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 18 [2021-03-11 00:22:38,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814206101] [2021-03-11 00:22:38,941 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:22:38,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:38,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:22:38,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:22:38,941 INFO L87 Difference]: Start difference. First operand 16736 states and 61447 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:42,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:42,688 INFO L93 Difference]: Finished difference Result 34371 states and 119658 transitions. [2021-03-11 00:22:42,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-03-11 00:22:42,691 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-03-11 00:22:42,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:42,753 INFO L225 Difference]: With dead ends: 34371 [2021-03-11 00:22:42,753 INFO L226 Difference]: Without dead ends: 34371 [2021-03-11 00:22:42,754 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 937 ImplicationChecksByTransitivity, 2338.4ms TimeCoverageRelationStatistics Valid=833, Invalid=2359, Unknown=0, NotChecked=0, Total=3192 [2021-03-11 00:22:42,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34371 states. [2021-03-11 00:22:43,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34371 to 16748. [2021-03-11 00:22:43,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16748 states, 16747 states have (on average 3.6716426822714516) internal successors, (61489), 16747 states have internal predecessors, (61489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:43,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16748 states to 16748 states and 61489 transitions. [2021-03-11 00:22:43,230 INFO L78 Accepts]: Start accepts. Automaton has 16748 states and 61489 transitions. Word has length 36 [2021-03-11 00:22:43,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:43,230 INFO L480 AbstractCegarLoop]: Abstraction has 16748 states and 61489 transitions. [2021-03-11 00:22:43,230 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:43,230 INFO L276 IsEmpty]: Start isEmpty. Operand 16748 states and 61489 transitions. [2021-03-11 00:22:43,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-11 00:22:43,255 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:43,255 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:43,455 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:43,455 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:43,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:43,456 INFO L82 PathProgramCache]: Analyzing trace with hash -2051604804, now seen corresponding path program 43 times [2021-03-11 00:22:43,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:43,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129249047] [2021-03-11 00:22:43,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:43,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:43,620 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-11 00:22:43,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129249047] [2021-03-11 00:22:43,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185554745] [2021-03-11 00:22:43,620 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:43,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:43,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-11 00:22:43,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:44,362 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:22:44,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:44,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-03-11 00:22:44,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677486208] [2021-03-11 00:22:44,363 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:22:44,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:44,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:22:44,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:22:44,364 INFO L87 Difference]: Start difference. First operand 16748 states and 61489 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:53,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:53,637 INFO L93 Difference]: Finished difference Result 35272 states and 121644 transitions. [2021-03-11 00:22:53,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2021-03-11 00:22:53,641 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-03-11 00:22:53,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:53,718 INFO L225 Difference]: With dead ends: 35272 [2021-03-11 00:22:53,718 INFO L226 Difference]: Without dead ends: 35268 [2021-03-11 00:22:53,720 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6696 ImplicationChecksByTransitivity, 6574.9ms TimeCoverageRelationStatistics Valid=3278, Invalid=13752, Unknown=0, NotChecked=0, Total=17030 [2021-03-11 00:22:53,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35268 states. [2021-03-11 00:22:54,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35268 to 16857. [2021-03-11 00:22:54,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16857 states, 16856 states have (on average 3.670799715234931) internal successors, (61875), 16856 states have internal predecessors, (61875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:54,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16857 states to 16857 states and 61875 transitions. [2021-03-11 00:22:54,190 INFO L78 Accepts]: Start accepts. Automaton has 16857 states and 61875 transitions. Word has length 36 [2021-03-11 00:22:54,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:54,190 INFO L480 AbstractCegarLoop]: Abstraction has 16857 states and 61875 transitions. [2021-03-11 00:22:54,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:54,190 INFO L276 IsEmpty]: Start isEmpty. Operand 16857 states and 61875 transitions. [2021-03-11 00:22:54,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-11 00:22:54,215 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:54,215 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:54,416 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:54,416 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:54,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:54,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1470279356, now seen corresponding path program 44 times [2021-03-11 00:22:54,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:54,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822512103] [2021-03-11 00:22:54,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:54,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:54,607 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:54,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822512103] [2021-03-11 00:22:54,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645149565] [2021-03-11 00:22:54,607 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:54,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:22:54,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:54,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-11 00:22:54,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:55,276 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-11 00:22:55,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:55,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-03-11 00:22:55,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629805440] [2021-03-11 00:22:55,277 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:22:55,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:55,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:22:55,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:22:55,277 INFO L87 Difference]: Start difference. First operand 16857 states and 61875 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:02,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:23:02,144 INFO L93 Difference]: Finished difference Result 33707 states and 117783 transitions. [2021-03-11 00:23:02,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-03-11 00:23:02,148 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-03-11 00:23:02,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:23:02,222 INFO L225 Difference]: With dead ends: 33707 [2021-03-11 00:23:02,223 INFO L226 Difference]: Without dead ends: 33683 [2021-03-11 00:23:02,224 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4261 ImplicationChecksByTransitivity, 4831.4ms TimeCoverageRelationStatistics Valid=2404, Invalid=9152, Unknown=0, NotChecked=0, Total=11556 [2021-03-11 00:23:02,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33683 states. [2021-03-11 00:23:02,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33683 to 16813. [2021-03-11 00:23:02,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16813 states, 16812 states have (on average 3.673507018796098) internal successors, (61759), 16812 states have internal predecessors, (61759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:02,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16813 states to 16813 states and 61759 transitions. [2021-03-11 00:23:02,683 INFO L78 Accepts]: Start accepts. Automaton has 16813 states and 61759 transitions. Word has length 36 [2021-03-11 00:23:02,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:23:02,683 INFO L480 AbstractCegarLoop]: Abstraction has 16813 states and 61759 transitions. [2021-03-11 00:23:02,683 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:02,683 INFO L276 IsEmpty]: Start isEmpty. Operand 16813 states and 61759 transitions. [2021-03-11 00:23:02,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-11 00:23:02,708 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:23:02,708 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:23:02,908 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:23:02,908 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:23:02,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:23:02,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1021111212, now seen corresponding path program 45 times [2021-03-11 00:23:02,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:23:02,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375709841] [2021-03-11 00:23:02,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:23:02,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:23:03,128 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:03,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375709841] [2021-03-11 00:23:03,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979399942] [2021-03-11 00:23:03,128 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:23:03,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-11 00:23:03,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:23:03,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-11 00:23:03,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:23:03,793 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:03,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:23:03,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 18 [2021-03-11 00:23:03,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411023387] [2021-03-11 00:23:03,793 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:23:03,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:23:03,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:23:03,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:23:03,794 INFO L87 Difference]: Start difference. First operand 16813 states and 61759 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:07,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:23:07,399 INFO L93 Difference]: Finished difference Result 30377 states and 106733 transitions. [2021-03-11 00:23:07,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-03-11 00:23:07,402 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-03-11 00:23:07,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:23:07,468 INFO L225 Difference]: With dead ends: 30377 [2021-03-11 00:23:07,468 INFO L226 Difference]: Without dead ends: 30377 [2021-03-11 00:23:07,469 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1259 ImplicationChecksByTransitivity, 2330.7ms TimeCoverageRelationStatistics Valid=984, Invalid=2798, Unknown=0, NotChecked=0, Total=3782 [2021-03-11 00:23:07,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30377 states. [2021-03-11 00:23:07,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30377 to 17605. [2021-03-11 00:23:07,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17605 states, 17604 states have (on average 3.6770620313565097) internal successors, (64731), 17604 states have internal predecessors, (64731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:07,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17605 states to 17605 states and 64731 transitions. [2021-03-11 00:23:07,901 INFO L78 Accepts]: Start accepts. Automaton has 17605 states and 64731 transitions. Word has length 36 [2021-03-11 00:23:07,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:23:07,901 INFO L480 AbstractCegarLoop]: Abstraction has 17605 states and 64731 transitions. [2021-03-11 00:23:07,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:07,901 INFO L276 IsEmpty]: Start isEmpty. Operand 17605 states and 64731 transitions. [2021-03-11 00:23:07,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-11 00:23:07,927 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:23:07,927 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:23:08,127 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-03-11 00:23:08,127 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:23:08,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:23:08,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1847708024, now seen corresponding path program 46 times [2021-03-11 00:23:08,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:23:08,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730049693] [2021-03-11 00:23:08,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:23:08,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:23:08,276 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:08,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730049693] [2021-03-11 00:23:08,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833136069] [2021-03-11 00:23:08,276 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:23:08,295 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:23:08,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:23:08,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-11 00:23:08,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:23:08,888 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-11 00:23:08,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:23:08,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-03-11 00:23:08,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228836217] [2021-03-11 00:23:08,889 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:23:08,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:23:08,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:23:08,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:23:08,889 INFO L87 Difference]: Start difference. First operand 17605 states and 64731 transitions. Second operand has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:15,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:23:15,337 INFO L93 Difference]: Finished difference Result 32211 states and 112550 transitions. [2021-03-11 00:23:15,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-03-11 00:23:15,341 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-03-11 00:23:15,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:23:15,413 INFO L225 Difference]: With dead ends: 32211 [2021-03-11 00:23:15,413 INFO L226 Difference]: Without dead ends: 32171 [2021-03-11 00:23:15,414 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3888 ImplicationChecksByTransitivity, 4196.2ms TimeCoverageRelationStatistics Valid=1956, Invalid=8346, Unknown=0, NotChecked=0, Total=10302 [2021-03-11 00:23:15,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32171 states. [2021-03-11 00:23:15,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32171 to 17837. [2021-03-11 00:23:15,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17837 states, 17836 states have (on average 3.665339762278538) internal successors, (65375), 17836 states have internal predecessors, (65375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:15,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17837 states to 17837 states and 65375 transitions. [2021-03-11 00:23:15,867 INFO L78 Accepts]: Start accepts. Automaton has 17837 states and 65375 transitions. Word has length 36 [2021-03-11 00:23:15,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:23:15,868 INFO L480 AbstractCegarLoop]: Abstraction has 17837 states and 65375 transitions. [2021-03-11 00:23:15,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:15,868 INFO L276 IsEmpty]: Start isEmpty. Operand 17837 states and 65375 transitions. [2021-03-11 00:23:15,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-11 00:23:15,894 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:23:15,894 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:23:16,094 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-03-11 00:23:16,094 INFO L428 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:23:16,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:23:16,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1284231232, now seen corresponding path program 66 times [2021-03-11 00:23:16,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:23:16,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816608598] [2021-03-11 00:23:16,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:23:16,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:23:16,291 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:23:16,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816608598] [2021-03-11 00:23:16,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648324954] [2021-03-11 00:23:16,292 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:23:16,313 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-11 00:23:16,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:23:16,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-11 00:23:16,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:23:16,933 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-11 00:23:16,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:23:16,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-03-11 00:23:16,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488288579] [2021-03-11 00:23:16,933 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:23:16,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:23:16,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:23:16,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:23:16,934 INFO L87 Difference]: Start difference. First operand 17837 states and 65375 transitions. Second operand has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:23,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:23:23,806 INFO L93 Difference]: Finished difference Result 32457 states and 112963 transitions. [2021-03-11 00:23:23,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-03-11 00:23:23,810 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-03-11 00:23:23,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:23:23,880 INFO L225 Difference]: With dead ends: 32457 [2021-03-11 00:23:23,880 INFO L226 Difference]: Without dead ends: 32457 [2021-03-11 00:23:23,881 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3180 ImplicationChecksByTransitivity, 4280.4ms TimeCoverageRelationStatistics Valid=2078, Invalid=6664, Unknown=0, NotChecked=0, Total=8742 [2021-03-11 00:23:23,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32457 states. [2021-03-11 00:23:24,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32457 to 17598. [2021-03-11 00:23:24,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17598 states, 17597 states have (on average 3.650792748763994) internal successors, (64243), 17597 states have internal predecessors, (64243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:24,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17598 states to 17598 states and 64243 transitions. [2021-03-11 00:23:24,347 INFO L78 Accepts]: Start accepts. Automaton has 17598 states and 64243 transitions. Word has length 36 [2021-03-11 00:23:24,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:23:24,347 INFO L480 AbstractCegarLoop]: Abstraction has 17598 states and 64243 transitions. [2021-03-11 00:23:24,347 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:24,347 INFO L276 IsEmpty]: Start isEmpty. Operand 17598 states and 64243 transitions. [2021-03-11 00:23:24,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-11 00:23:24,374 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:23:24,374 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:23:24,574 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-03-11 00:23:24,574 INFO L428 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:23:24,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:23:24,574 INFO L82 PathProgramCache]: Analyzing trace with hash -2050547776, now seen corresponding path program 67 times [2021-03-11 00:23:24,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:23:24,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525779369] [2021-03-11 00:23:24,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:23:24,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:23:24,774 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:23:24,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525779369] [2021-03-11 00:23:24,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208580213] [2021-03-11 00:23:24,774 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:23:24,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:23:24,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-11 00:23:24,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:23:25,299 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-11 00:23:25,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:23:25,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-03-11 00:23:25,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761720288] [2021-03-11 00:23:25,300 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:23:25,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:23:25,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:23:25,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:23:25,300 INFO L87 Difference]: Start difference. First operand 17598 states and 64243 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:27,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:23:27,326 INFO L93 Difference]: Finished difference Result 30060 states and 105966 transitions. [2021-03-11 00:23:27,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-11 00:23:27,326 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-03-11 00:23:27,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:23:27,392 INFO L225 Difference]: With dead ends: 30060 [2021-03-11 00:23:27,392 INFO L226 Difference]: Without dead ends: 30060 [2021-03-11 00:23:27,392 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 1045.3ms TimeCoverageRelationStatistics Valid=287, Invalid=835, Unknown=0, NotChecked=0, Total=1122 [2021-03-11 00:23:27,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30060 states. [2021-03-11 00:23:27,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30060 to 17521. [2021-03-11 00:23:27,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17521 states, 17520 states have (on average 3.6473173515981734) internal successors, (63901), 17520 states have internal predecessors, (63901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:27,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17521 states to 17521 states and 63901 transitions. [2021-03-11 00:23:27,833 INFO L78 Accepts]: Start accepts. Automaton has 17521 states and 63901 transitions. Word has length 36 [2021-03-11 00:23:27,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:23:27,833 INFO L480 AbstractCegarLoop]: Abstraction has 17521 states and 63901 transitions. [2021-03-11 00:23:27,833 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:27,833 INFO L276 IsEmpty]: Start isEmpty. Operand 17521 states and 63901 transitions. [2021-03-11 00:23:27,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-11 00:23:27,859 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:23:27,859 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:23:28,060 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-03-11 00:23:28,060 INFO L428 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:23:28,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:23:28,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1497961976, now seen corresponding path program 68 times [2021-03-11 00:23:28,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:23:28,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055573099] [2021-03-11 00:23:28,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:23:28,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:23:28,281 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:23:28,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055573099] [2021-03-11 00:23:28,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151118087] [2021-03-11 00:23:28,282 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:23:28,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:23:28,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:23:28,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-11 00:23:28,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:23:28,988 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-11 00:23:28,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:23:28,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-03-11 00:23:28,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564990407] [2021-03-11 00:23:28,988 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:23:28,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:23:28,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:23:28,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:23:28,989 INFO L87 Difference]: Start difference. First operand 17521 states and 63901 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:31,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:23:31,952 INFO L93 Difference]: Finished difference Result 32427 states and 113320 transitions. [2021-03-11 00:23:31,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-11 00:23:31,956 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-03-11 00:23:31,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:23:32,030 INFO L225 Difference]: With dead ends: 32427 [2021-03-11 00:23:32,030 INFO L226 Difference]: Without dead ends: 32427 [2021-03-11 00:23:32,030 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 1676.5ms TimeCoverageRelationStatistics Valid=500, Invalid=1570, Unknown=0, NotChecked=0, Total=2070 [2021-03-11 00:23:32,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32427 states. [2021-03-11 00:23:32,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32427 to 16968. [2021-03-11 00:23:32,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16968 states, 16967 states have (on average 3.6244474568279603) internal successors, (61496), 16967 states have internal predecessors, (61496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:32,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16968 states to 16968 states and 61496 transitions. [2021-03-11 00:23:32,499 INFO L78 Accepts]: Start accepts. Automaton has 16968 states and 61496 transitions. Word has length 36 [2021-03-11 00:23:32,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:23:32,499 INFO L480 AbstractCegarLoop]: Abstraction has 16968 states and 61496 transitions. [2021-03-11 00:23:32,499 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:32,499 INFO L276 IsEmpty]: Start isEmpty. Operand 16968 states and 61496 transitions. [2021-03-11 00:23:32,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-11 00:23:32,525 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:23:32,525 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:23:32,725 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:23:32,726 INFO L428 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:23:32,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:23:32,726 INFO L82 PathProgramCache]: Analyzing trace with hash 281583822, now seen corresponding path program 69 times [2021-03-11 00:23:32,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:23:32,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522375714] [2021-03-11 00:23:32,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:23:32,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:23:32,936 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:23:32,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522375714] [2021-03-11 00:23:32,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609853727] [2021-03-11 00:23:32,937 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:23:32,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-11 00:23:32,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:23:32,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-11 00:23:32,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:23:33,552 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-11 00:23:33,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:23:33,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2021-03-11 00:23:33,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358785383] [2021-03-11 00:23:33,552 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:23:33,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:23:33,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:23:33,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:23:33,553 INFO L87 Difference]: Start difference. First operand 16968 states and 61496 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:35,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:23:35,310 INFO L93 Difference]: Finished difference Result 28758 states and 100390 transitions. [2021-03-11 00:23:35,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-11 00:23:35,313 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-03-11 00:23:35,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:23:35,377 INFO L225 Difference]: With dead ends: 28758 [2021-03-11 00:23:35,377 INFO L226 Difference]: Without dead ends: 28758 [2021-03-11 00:23:35,377 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 1099.2ms TimeCoverageRelationStatistics Valid=312, Invalid=878, Unknown=0, NotChecked=0, Total=1190 [2021-03-11 00:23:35,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28758 states. [2021-03-11 00:23:35,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28758 to 16976. [2021-03-11 00:23:35,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16976 states, 16975 states have (on average 3.6240353460972017) internal successors, (61518), 16975 states have internal predecessors, (61518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:35,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16976 states to 16976 states and 61518 transitions. [2021-03-11 00:23:35,812 INFO L78 Accepts]: Start accepts. Automaton has 16976 states and 61518 transitions. Word has length 36 [2021-03-11 00:23:35,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:23:35,812 INFO L480 AbstractCegarLoop]: Abstraction has 16976 states and 61518 transitions. [2021-03-11 00:23:35,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:35,812 INFO L276 IsEmpty]: Start isEmpty. Operand 16976 states and 61518 transitions. [2021-03-11 00:23:35,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-11 00:23:35,838 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:23:35,838 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:23:36,038 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-03-11 00:23:36,038 INFO L428 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:23:36,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:23:36,038 INFO L82 PathProgramCache]: Analyzing trace with hash 2012617660, now seen corresponding path program 70 times [2021-03-11 00:23:36,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:23:36,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690729562] [2021-03-11 00:23:36,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:23:36,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:23:36,239 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:23:36,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690729562] [2021-03-11 00:23:36,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990504455] [2021-03-11 00:23:36,240 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:23:36,261 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:23:36,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:23:36,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-11 00:23:36,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:23:36,910 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-11 00:23:36,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:23:36,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-03-11 00:23:36,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185870491] [2021-03-11 00:23:36,910 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:23:36,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:23:36,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:23:36,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:23:36,911 INFO L87 Difference]: Start difference. First operand 16976 states and 61518 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:43,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:23:43,054 INFO L93 Difference]: Finished difference Result 30403 states and 103450 transitions. [2021-03-11 00:23:43,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-03-11 00:23:43,058 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-03-11 00:23:43,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:23:43,123 INFO L225 Difference]: With dead ends: 30403 [2021-03-11 00:23:43,123 INFO L226 Difference]: Without dead ends: 30395 [2021-03-11 00:23:43,124 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2864 ImplicationChecksByTransitivity, 4077.3ms TimeCoverageRelationStatistics Valid=1623, Invalid=6387, Unknown=0, NotChecked=0, Total=8010 [2021-03-11 00:23:43,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30395 states. [2021-03-11 00:23:43,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30395 to 17056. [2021-03-11 00:23:43,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17056 states, 17055 states have (on average 3.6026385224274406) internal successors, (61443), 17055 states have internal predecessors, (61443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:43,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17056 states to 17056 states and 61443 transitions. [2021-03-11 00:23:43,525 INFO L78 Accepts]: Start accepts. Automaton has 17056 states and 61443 transitions. Word has length 36 [2021-03-11 00:23:43,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:23:43,525 INFO L480 AbstractCegarLoop]: Abstraction has 17056 states and 61443 transitions. [2021-03-11 00:23:43,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:43,525 INFO L276 IsEmpty]: Start isEmpty. Operand 17056 states and 61443 transitions. [2021-03-11 00:23:43,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-11 00:23:43,551 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:23:43,551 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:23:43,751 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:23:43,751 INFO L428 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:23:43,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:23:43,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1239534524, now seen corresponding path program 71 times [2021-03-11 00:23:43,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:23:43,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301368628] [2021-03-11 00:23:43,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:23:43,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:23:43,957 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:23:43,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301368628] [2021-03-11 00:23:43,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238371644] [2021-03-11 00:23:43,957 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:23:43,981 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-11 00:23:43,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:23:43,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-11 00:23:43,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:23:44,511 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-11 00:23:44,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:23:44,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 15 [2021-03-11 00:23:44,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381688769] [2021-03-11 00:23:44,512 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-11 00:23:44,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:23:44,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-11 00:23:44,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-03-11 00:23:44,512 INFO L87 Difference]: Start difference. First operand 17056 states and 61443 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:47,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:23:47,915 INFO L93 Difference]: Finished difference Result 30660 states and 104376 transitions. [2021-03-11 00:23:47,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-03-11 00:23:47,918 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-03-11 00:23:47,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:23:47,988 INFO L225 Difference]: With dead ends: 30660 [2021-03-11 00:23:47,988 INFO L226 Difference]: Without dead ends: 30628 [2021-03-11 00:23:47,988 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1201 ImplicationChecksByTransitivity, 2264.3ms TimeCoverageRelationStatistics Valid=802, Invalid=2858, Unknown=0, NotChecked=0, Total=3660 [2021-03-11 00:23:48,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30628 states. [2021-03-11 00:23:48,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30628 to 17468. [2021-03-11 00:23:48,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17468 states, 17467 states have (on average 3.577488979217954) internal successors, (62488), 17467 states have internal predecessors, (62488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:48,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17468 states to 17468 states and 62488 transitions. [2021-03-11 00:23:48,429 INFO L78 Accepts]: Start accepts. Automaton has 17468 states and 62488 transitions. Word has length 36 [2021-03-11 00:23:48,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:23:48,429 INFO L480 AbstractCegarLoop]: Abstraction has 17468 states and 62488 transitions. [2021-03-11 00:23:48,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:48,430 INFO L276 IsEmpty]: Start isEmpty. Operand 17468 states and 62488 transitions. [2021-03-11 00:23:48,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-11 00:23:48,456 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:23:48,456 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:23:48,656 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-03-11 00:23:48,656 INFO L428 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:23:48,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:23:48,656 INFO L82 PathProgramCache]: Analyzing trace with hash 790366380, now seen corresponding path program 72 times [2021-03-11 00:23:48,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:23:48,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182058735] [2021-03-11 00:23:48,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:23:48,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:23:48,894 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:23:48,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182058735] [2021-03-11 00:23:48,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860116583] [2021-03-11 00:23:48,895 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:23:48,915 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-11 00:23:48,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:23:48,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-11 00:23:48,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:23:49,539 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-11 00:23:49,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:23:49,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-03-11 00:23:49,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459532138] [2021-03-11 00:23:49,539 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:23:49,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:23:49,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:23:49,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:23:49,540 INFO L87 Difference]: Start difference. First operand 17468 states and 62488 transitions. Second operand has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:55,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:23:55,400 INFO L93 Difference]: Finished difference Result 34087 states and 113313 transitions. [2021-03-11 00:23:55,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-03-11 00:23:55,404 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have 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 [2021-03-11 00:23:55,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:23:55,477 INFO L225 Difference]: With dead ends: 34087 [2021-03-11 00:23:55,477 INFO L226 Difference]: Without dead ends: 34087 [2021-03-11 00:23:55,478 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3295 ImplicationChecksByTransitivity, 4010.8ms TimeCoverageRelationStatistics Valid=1793, Invalid=6397, Unknown=0, NotChecked=0, Total=8190 [2021-03-11 00:23:55,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34087 states. [2021-03-11 00:23:55,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34087 to 17658. [2021-03-11 00:23:55,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17658 states, 17657 states have (on average 3.573596873761115) internal successors, (63099), 17657 states have internal predecessors, (63099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:55,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17658 states to 17658 states and 63099 transitions. [2021-03-11 00:23:55,948 INFO L78 Accepts]: Start accepts. Automaton has 17658 states and 63099 transitions. Word has length 36 [2021-03-11 00:23:55,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:23:55,948 INFO L480 AbstractCegarLoop]: Abstraction has 17658 states and 63099 transitions. [2021-03-11 00:23:55,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:55,948 INFO L276 IsEmpty]: Start isEmpty. Operand 17658 states and 63099 transitions. [2021-03-11 00:23:55,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-11 00:23:55,975 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:23:55,975 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:23:56,175 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2021-03-11 00:23:56,175 INFO L428 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:23:56,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:23:56,176 INFO L82 PathProgramCache]: Analyzing trace with hash -2078452856, now seen corresponding path program 73 times [2021-03-11 00:23:56,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:23:56,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868041659] [2021-03-11 00:23:56,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:23:56,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:23:56,422 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:23:56,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868041659] [2021-03-11 00:23:56,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143843515] [2021-03-11 00:23:56,423 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:23:56,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:23:56,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-11 00:23:56,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:23:56,862 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-11 00:23:56,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:23:56,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-03-11 00:23:56,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262082430] [2021-03-11 00:23:56,862 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:23:56,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:23:56,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:23:56,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:23:56,863 INFO L87 Difference]: Start difference. First operand 17658 states and 63099 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:00,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:24:00,978 INFO L93 Difference]: Finished difference Result 30440 states and 103806 transitions. [2021-03-11 00:24:00,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-03-11 00:24:00,982 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-03-11 00:24:00,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:24:01,051 INFO L225 Difference]: With dead ends: 30440 [2021-03-11 00:24:01,051 INFO L226 Difference]: Without dead ends: 30360 [2021-03-11 00:24:01,052 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1546 ImplicationChecksByTransitivity, 2723.1ms TimeCoverageRelationStatistics Valid=916, Invalid=3640, Unknown=0, NotChecked=0, Total=4556 [2021-03-11 00:24:01,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30360 states. [2021-03-11 00:24:01,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30360 to 16860. [2021-03-11 00:24:01,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16860 states, 16859 states have (on average 3.5827747790497657) internal successors, (60402), 16859 states have internal predecessors, (60402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:01,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16860 states to 16860 states and 60402 transitions. [2021-03-11 00:24:01,495 INFO L78 Accepts]: Start accepts. Automaton has 16860 states and 60402 transitions. Word has length 36 [2021-03-11 00:24:01,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:24:01,496 INFO L480 AbstractCegarLoop]: Abstraction has 16860 states and 60402 transitions. [2021-03-11 00:24:01,496 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:01,496 INFO L276 IsEmpty]: Start isEmpty. Operand 16860 states and 60402 transitions. [2021-03-11 00:24:01,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-11 00:24:01,523 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:24:01,523 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:24:01,723 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:24:01,724 INFO L428 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:24:01,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:24:01,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1434655568, now seen corresponding path program 74 times [2021-03-11 00:24:01,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:24:01,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516792231] [2021-03-11 00:24:01,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:24:01,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:24:02,136 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:02,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516792231] [2021-03-11 00:24:02,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576517506] [2021-03-11 00:24:02,136 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:24:02,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:24:02,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:24:02,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-11 00:24:02,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:24:02,662 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:02,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:24:02,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 17 [2021-03-11 00:24:02,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239499126] [2021-03-11 00:24:02,662 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:24:02,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:24:02,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:24:02,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:24:02,662 INFO L87 Difference]: Start difference. First operand 16860 states and 60402 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:06,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:24:06,299 INFO L93 Difference]: Finished difference Result 29315 states and 98983 transitions. [2021-03-11 00:24:06,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-03-11 00:24:06,303 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-03-11 00:24:06,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:24:06,366 INFO L225 Difference]: With dead ends: 29315 [2021-03-11 00:24:06,366 INFO L226 Difference]: Without dead ends: 29315 [2021-03-11 00:24:06,367 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1372 ImplicationChecksByTransitivity, 2610.5ms TimeCoverageRelationStatistics Valid=923, Invalid=2983, Unknown=0, NotChecked=0, Total=3906 [2021-03-11 00:24:06,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29315 states. [2021-03-11 00:24:06,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29315 to 17576. [2021-03-11 00:24:06,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17576 states, 17575 states have (on average 3.553570412517781) internal successors, (62454), 17575 states have internal predecessors, (62454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:06,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17576 states to 17576 states and 62454 transitions. [2021-03-11 00:24:06,807 INFO L78 Accepts]: Start accepts. Automaton has 17576 states and 62454 transitions. Word has length 36 [2021-03-11 00:24:06,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:24:06,807 INFO L480 AbstractCegarLoop]: Abstraction has 17576 states and 62454 transitions. [2021-03-11 00:24:06,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:06,807 INFO L276 IsEmpty]: Start isEmpty. Operand 17576 states and 62454 transitions. [2021-03-11 00:24:06,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-11 00:24:06,834 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:24:06,834 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:24:07,034 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:24:07,034 INFO L428 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:24:07,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:24:07,034 INFO L82 PathProgramCache]: Analyzing trace with hash 296378270, now seen corresponding path program 75 times [2021-03-11 00:24:07,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:24:07,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983552560] [2021-03-11 00:24:07,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:24:07,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:24:07,285 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:07,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983552560] [2021-03-11 00:24:07,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011295471] [2021-03-11 00:24:07,285 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:24:07,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-11 00:24:07,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:24:07,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-11 00:24:07,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:24:07,799 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:07,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:24:07,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 16 [2021-03-11 00:24:07,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295501511] [2021-03-11 00:24:07,800 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:24:07,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:24:07,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:24:07,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:24:07,800 INFO L87 Difference]: Start difference. First operand 17576 states and 62454 transitions. Second operand has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:10,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:24:10,500 INFO L93 Difference]: Finished difference Result 28174 states and 96015 transitions. [2021-03-11 00:24:10,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-03-11 00:24:10,504 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-03-11 00:24:10,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:24:10,566 INFO L225 Difference]: With dead ends: 28174 [2021-03-11 00:24:10,566 INFO L226 Difference]: Without dead ends: 28158 [2021-03-11 00:24:10,566 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 1735.1ms TimeCoverageRelationStatistics Valid=507, Invalid=1749, Unknown=0, NotChecked=0, Total=2256 [2021-03-11 00:24:10,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28158 states. [2021-03-11 00:24:10,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28158 to 17442. [2021-03-11 00:24:10,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17442 states, 17441 states have (on average 3.558798234046213) internal successors, (62069), 17441 states have internal predecessors, (62069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:10,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17442 states to 17442 states and 62069 transitions. [2021-03-11 00:24:10,994 INFO L78 Accepts]: Start accepts. Automaton has 17442 states and 62069 transitions. Word has length 36 [2021-03-11 00:24:10,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:24:10,994 INFO L480 AbstractCegarLoop]: Abstraction has 17442 states and 62069 transitions. [2021-03-11 00:24:10,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:10,994 INFO L276 IsEmpty]: Start isEmpty. Operand 17442 states and 62069 transitions. [2021-03-11 00:24:11,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-11 00:24:11,021 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:24:11,021 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:24:11,222 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-03-11 00:24:11,222 INFO L428 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:24:11,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:24:11,222 INFO L82 PathProgramCache]: Analyzing trace with hash -384155512, now seen corresponding path program 76 times [2021-03-11 00:24:11,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:24:11,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955003630] [2021-03-11 00:24:11,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:24:11,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:24:11,511 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:11,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955003630] [2021-03-11 00:24:11,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541501609] [2021-03-11 00:24:11,511 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:24:11,530 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:24:11,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:24:11,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-11 00:24:11,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:24:12,108 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-11 00:24:12,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:24:12,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 17 [2021-03-11 00:24:12,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535331668] [2021-03-11 00:24:12,109 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:24:12,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:24:12,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:24:12,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:24:12,109 INFO L87 Difference]: Start difference. First operand 17442 states and 62069 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:17,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:24:17,443 INFO L93 Difference]: Finished difference Result 30671 states and 103844 transitions. [2021-03-11 00:24:17,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-03-11 00:24:17,447 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-03-11 00:24:17,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:24:17,516 INFO L225 Difference]: With dead ends: 30671 [2021-03-11 00:24:17,516 INFO L226 Difference]: Without dead ends: 30591 [2021-03-11 00:24:17,516 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2317 ImplicationChecksByTransitivity, 3496.2ms TimeCoverageRelationStatistics Valid=1207, Invalid=5435, Unknown=0, NotChecked=0, Total=6642 [2021-03-11 00:24:17,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30591 states. [2021-03-11 00:24:17,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30591 to 17956. [2021-03-11 00:24:17,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17956 states, 17955 states have (on average 3.536396546922863) internal successors, (63496), 17955 states have internal predecessors, (63496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:17,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17956 states to 17956 states and 63496 transitions. [2021-03-11 00:24:17,952 INFO L78 Accepts]: Start accepts. Automaton has 17956 states and 63496 transitions. Word has length 36 [2021-03-11 00:24:17,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:24:17,952 INFO L480 AbstractCegarLoop]: Abstraction has 17956 states and 63496 transitions. [2021-03-11 00:24:17,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:17,952 INFO L276 IsEmpty]: Start isEmpty. Operand 17956 states and 63496 transitions. [2021-03-11 00:24:17,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-11 00:24:17,975 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:24:17,975 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:24:18,176 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:24:18,176 INFO L428 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:24:18,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:24:18,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1269898876, now seen corresponding path program 77 times [2021-03-11 00:24:18,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:24:18,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486896040] [2021-03-11 00:24:18,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:24:18,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:24:18,423 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:18,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486896040] [2021-03-11 00:24:18,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974490600] [2021-03-11 00:24:18,424 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:24:18,447 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-11 00:24:18,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:24:18,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-11 00:24:18,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:24:19,038 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:24:19,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:24:19,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-03-11 00:24:19,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639772885] [2021-03-11 00:24:19,038 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:24:19,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:24:19,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:24:19,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:24:19,039 INFO L87 Difference]: Start difference. First operand 17956 states and 63496 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:25,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:24:25,516 INFO L93 Difference]: Finished difference Result 33489 states and 111985 transitions. [2021-03-11 00:24:25,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-03-11 00:24:25,519 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-03-11 00:24:25,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:24:25,594 INFO L225 Difference]: With dead ends: 33489 [2021-03-11 00:24:25,594 INFO L226 Difference]: Without dead ends: 33489 [2021-03-11 00:24:25,595 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3731 ImplicationChecksByTransitivity, 4517.9ms TimeCoverageRelationStatistics Valid=1759, Invalid=7943, Unknown=0, NotChecked=0, Total=9702 [2021-03-11 00:24:25,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33489 states. [2021-03-11 00:24:26,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33489 to 18616. [2021-03-11 00:24:26,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18616 states, 18615 states have (on average 3.516089175396186) internal successors, (65452), 18615 states have internal predecessors, (65452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:26,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18616 states to 18616 states and 65452 transitions. [2021-03-11 00:24:26,179 INFO L78 Accepts]: Start accepts. Automaton has 18616 states and 65452 transitions. Word has length 36 [2021-03-11 00:24:26,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:24:26,179 INFO L480 AbstractCegarLoop]: Abstraction has 18616 states and 65452 transitions. [2021-03-11 00:24:26,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:26,179 INFO L276 IsEmpty]: Start isEmpty. Operand 18616 states and 65452 transitions. [2021-03-11 00:24:26,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-11 00:24:26,208 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:24:26,208 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:24:26,408 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-03-11 00:24:26,409 INFO L428 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:24:26,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:24:26,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1727119096, now seen corresponding path program 78 times [2021-03-11 00:24:26,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:24:26,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231162691] [2021-03-11 00:24:26,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:24:26,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:24:26,704 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:26,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231162691] [2021-03-11 00:24:26,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729420955] [2021-03-11 00:24:26,704 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:24:26,726 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-11 00:24:26,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:24:26,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-11 00:24:26,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:24:27,559 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:27,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:24:27,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-03-11 00:24:27,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401194354] [2021-03-11 00:24:27,559 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-11 00:24:27,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:24:27,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-11 00:24:27,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-03-11 00:24:27,560 INFO L87 Difference]: Start difference. First operand 18616 states and 65452 transitions. Second operand has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:31,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:24:31,986 INFO L93 Difference]: Finished difference Result 38028 states and 127193 transitions. [2021-03-11 00:24:31,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-03-11 00:24:31,989 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-03-11 00:24:31,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:24:32,054 INFO L225 Difference]: With dead ends: 38028 [2021-03-11 00:24:32,054 INFO L226 Difference]: Without dead ends: 38028 [2021-03-11 00:24:32,055 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1031 ImplicationChecksByTransitivity, 2849.1ms TimeCoverageRelationStatistics Valid=751, Invalid=2441, Unknown=0, NotChecked=0, Total=3192 [2021-03-11 00:24:32,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38028 states. [2021-03-11 00:24:32,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38028 to 20478. [2021-03-11 00:24:32,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20478 states, 20477 states have (on average 3.5023196757337502) internal successors, (71717), 20477 states have internal predecessors, (71717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:32,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20478 states to 20478 states and 71717 transitions. [2021-03-11 00:24:32,617 INFO L78 Accepts]: Start accepts. Automaton has 20478 states and 71717 transitions. Word has length 36 [2021-03-11 00:24:32,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:24:32,617 INFO L480 AbstractCegarLoop]: Abstraction has 20478 states and 71717 transitions. [2021-03-11 00:24:32,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:32,617 INFO L276 IsEmpty]: Start isEmpty. Operand 20478 states and 71717 transitions. [2021-03-11 00:24:32,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-11 00:24:32,652 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:24:32,653 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:24:32,858 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-03-11 00:24:32,858 INFO L428 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:24:32,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:24:32,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1512470806, now seen corresponding path program 79 times [2021-03-11 00:24:32,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:24:32,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712829019] [2021-03-11 00:24:32,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:24:32,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:24:33,148 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:33,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712829019] [2021-03-11 00:24:33,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236016236] [2021-03-11 00:24:33,148 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:24:33,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:24:33,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-11 00:24:33,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:24:34,025 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:24:34,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:24:34,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-03-11 00:24:34,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350820980] [2021-03-11 00:24:34,025 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-11 00:24:34,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:24:34,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-11 00:24:34,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-03-11 00:24:34,026 INFO L87 Difference]: Start difference. First operand 20478 states and 71717 transitions. Second operand has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:48,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:24:48,928 INFO L93 Difference]: Finished difference Result 41593 states and 137151 transitions. [2021-03-11 00:24:48,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 175 states. [2021-03-11 00:24:48,932 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-03-11 00:24:48,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:24:49,030 INFO L225 Difference]: With dead ends: 41593 [2021-03-11 00:24:49,030 INFO L226 Difference]: Without dead ends: 41553 [2021-03-11 00:24:49,033 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13988 ImplicationChecksByTransitivity, 11701.8ms TimeCoverageRelationStatistics Valid=5552, Invalid=26668, Unknown=0, NotChecked=0, Total=32220 [2021-03-11 00:24:49,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41553 states. [2021-03-11 00:24:49,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41553 to 20092. [2021-03-11 00:24:49,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20092 states, 20091 states have (on average 3.490219501269225) internal successors, (70122), 20091 states have internal predecessors, (70122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:49,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20092 states to 20092 states and 70122 transitions. [2021-03-11 00:24:49,665 INFO L78 Accepts]: Start accepts. Automaton has 20092 states and 70122 transitions. Word has length 36 [2021-03-11 00:24:49,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:24:49,666 INFO L480 AbstractCegarLoop]: Abstraction has 20092 states and 70122 transitions. [2021-03-11 00:24:49,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:49,666 INFO L276 IsEmpty]: Start isEmpty. Operand 20092 states and 70122 transitions. [2021-03-11 00:24:49,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-11 00:24:49,699 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:24:49,699 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:24:49,900 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-03-11 00:24:49,901 INFO L428 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:24:49,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:24:49,901 INFO L82 PathProgramCache]: Analyzing trace with hash 883177114, now seen corresponding path program 80 times [2021-03-11 00:24:49,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:24:49,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475062694] [2021-03-11 00:24:49,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:24:49,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:24:50,209 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:50,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475062694] [2021-03-11 00:24:50,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565929135] [2021-03-11 00:24:50,211 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:24:50,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:24:50,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:24:50,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-11 00:24:50,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:24:50,977 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-11 00:24:50,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:24:50,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-03-11 00:24:50,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760139244] [2021-03-11 00:24:50,978 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-11 00:24:50,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:24:50,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-11 00:24:50,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:24:50,979 INFO L87 Difference]: Start difference. First operand 20092 states and 70122 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:25:02,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:25:02,015 INFO L93 Difference]: Finished difference Result 39501 states and 130537 transitions. [2021-03-11 00:25:02,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2021-03-11 00:25:02,019 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-03-11 00:25:02,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:25:02,116 INFO L225 Difference]: With dead ends: 39501 [2021-03-11 00:25:02,116 INFO L226 Difference]: Without dead ends: 39385 [2021-03-11 00:25:02,118 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7238 ImplicationChecksByTransitivity, 8115.5ms TimeCoverageRelationStatistics Valid=3337, Invalid=13955, Unknown=0, NotChecked=0, Total=17292 [2021-03-11 00:25:02,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39385 states. [2021-03-11 00:25:02,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39385 to 20170. [2021-03-11 00:25:02,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20170 states, 20169 states have (on average 3.4880757598294414) internal successors, (70351), 20169 states have internal predecessors, (70351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:25:02,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20170 states to 20170 states and 70351 transitions. [2021-03-11 00:25:02,752 INFO L78 Accepts]: Start accepts. Automaton has 20170 states and 70351 transitions. Word has length 36 [2021-03-11 00:25:02,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:25:02,752 INFO L480 AbstractCegarLoop]: Abstraction has 20170 states and 70351 transitions. [2021-03-11 00:25:02,752 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:25:02,752 INFO L276 IsEmpty]: Start isEmpty. Operand 20170 states and 70351 transitions. [2021-03-11 00:25:02,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-11 00:25:02,785 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:25:02,785 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:25:02,987 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:25:02,987 INFO L428 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:25:02,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:25:02,987 INFO L82 PathProgramCache]: Analyzing trace with hash 246710260, now seen corresponding path program 81 times [2021-03-11 00:25:02,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:25:02,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635201929] [2021-03-11 00:25:02,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:25:02,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:25:03,301 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:03,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635201929] [2021-03-11 00:25:03,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313849679] [2021-03-11 00:25:03,302 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:25:03,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-11 00:25:03,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:25:03,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-11 00:25:03,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:25:04,148 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:04,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:25:04,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-03-11 00:25:04,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581739173] [2021-03-11 00:25:04,148 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:25:04,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:25:04,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:25:04,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:25:04,149 INFO L87 Difference]: Start difference. First operand 20170 states and 70351 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:25:14,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:25:14,707 INFO L93 Difference]: Finished difference Result 39351 states and 130477 transitions. [2021-03-11 00:25:14,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2021-03-11 00:25:14,711 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-03-11 00:25:14,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:25:14,803 INFO L225 Difference]: With dead ends: 39351 [2021-03-11 00:25:14,803 INFO L226 Difference]: Without dead ends: 39239 [2021-03-11 00:25:14,804 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5704 ImplicationChecksByTransitivity, 7373.1ms TimeCoverageRelationStatistics Valid=2492, Invalid=12028, Unknown=0, NotChecked=0, Total=14520 [2021-03-11 00:25:14,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39239 states. [2021-03-11 00:25:15,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39239 to 20262. [2021-03-11 00:25:15,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20262 states, 20261 states have (on average 3.4852672622279255) internal successors, (70615), 20261 states have internal predecessors, (70615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:25:15,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20262 states to 20262 states and 70615 transitions. [2021-03-11 00:25:15,429 INFO L78 Accepts]: Start accepts. Automaton has 20262 states and 70615 transitions. Word has length 36 [2021-03-11 00:25:15,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:25:15,430 INFO L480 AbstractCegarLoop]: Abstraction has 20262 states and 70615 transitions. [2021-03-11 00:25:15,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:25:15,430 INFO L276 IsEmpty]: Start isEmpty. Operand 20262 states and 70615 transitions. [2021-03-11 00:25:15,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-11 00:25:15,461 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:25:15,461 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:25:15,663 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-03-11 00:25:15,663 INFO L428 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:25:15,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:25:15,663 INFO L82 PathProgramCache]: Analyzing trace with hash -36962824, now seen corresponding path program 82 times [2021-03-11 00:25:15,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:25:15,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910288755] [2021-03-11 00:25:15,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:25:15,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:25:15,988 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:15,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910288755] [2021-03-11 00:25:15,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627256564] [2021-03-11 00:25:15,989 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:25:16,015 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:25:16,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:25:16,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-11 00:25:16,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:25:16,771 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-11 00:25:16,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:25:16,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 19 [2021-03-11 00:25:16,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567749300] [2021-03-11 00:25:16,772 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:25:16,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:25:16,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:25:16,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:25:16,773 INFO L87 Difference]: Start difference. First operand 20262 states and 70615 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:25:26,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:25:26,477 INFO L93 Difference]: Finished difference Result 38055 states and 126516 transitions. [2021-03-11 00:25:26,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-03-11 00:25:26,481 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-03-11 00:25:26,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:25:26,565 INFO L225 Difference]: With dead ends: 38055 [2021-03-11 00:25:26,566 INFO L226 Difference]: Without dead ends: 37859 [2021-03-11 00:25:26,566 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4450 ImplicationChecksByTransitivity, 6706.9ms TimeCoverageRelationStatistics Valid=2108, Invalid=9664, Unknown=0, NotChecked=0, Total=11772 [2021-03-11 00:25:26,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37859 states. [2021-03-11 00:25:27,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37859 to 21405. [2021-03-11 00:25:27,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21405 states, 21404 states have (on average 3.48878714259017) internal successors, (74674), 21404 states have internal predecessors, (74674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:25:27,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21405 states to 21405 states and 74674 transitions. [2021-03-11 00:25:27,118 INFO L78 Accepts]: Start accepts. Automaton has 21405 states and 74674 transitions. Word has length 36 [2021-03-11 00:25:27,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:25:27,118 INFO L480 AbstractCegarLoop]: Abstraction has 21405 states and 74674 transitions. [2021-03-11 00:25:27,118 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:25:27,118 INFO L276 IsEmpty]: Start isEmpty. Operand 21405 states and 74674 transitions. [2021-03-11 00:25:27,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-11 00:25:27,151 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:25:27,151 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:25:27,351 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-03-11 00:25:27,352 INFO L428 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:25:27,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:25:27,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1567865864, now seen corresponding path program 83 times [2021-03-11 00:25:27,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:25:27,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234048882] [2021-03-11 00:25:27,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:25:27,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:25:27,569 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:25:27,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234048882] [2021-03-11 00:25:27,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710182339] [2021-03-11 00:25:27,570 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:25:27,593 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-11 00:25:27,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:25:27,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-11 00:25:27,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:25:28,518 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:28,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:25:28,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2021-03-11 00:25:28,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019690320] [2021-03-11 00:25:28,518 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:25:28,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:25:28,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:25:28,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:25:28,519 INFO L87 Difference]: Start difference. First operand 21405 states and 74674 transitions. Second operand has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:25:31,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:25:31,273 INFO L93 Difference]: Finished difference Result 44305 states and 150424 transitions. [2021-03-11 00:25:31,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-11 00:25:31,277 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-03-11 00:25:31,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:25:31,387 INFO L225 Difference]: With dead ends: 44305 [2021-03-11 00:25:31,387 INFO L226 Difference]: Without dead ends: 44305 [2021-03-11 00:25:31,387 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 1411.4ms TimeCoverageRelationStatistics Valid=311, Invalid=811, Unknown=0, NotChecked=0, Total=1122 [2021-03-11 00:25:31,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44305 states. [2021-03-11 00:25:32,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44305 to 21985. [2021-03-11 00:25:32,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21985 states, 21984 states have (on average 3.5090065502183405) internal successors, (77142), 21984 states have internal predecessors, (77142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:25:32,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21985 states to 21985 states and 77142 transitions. [2021-03-11 00:25:32,111 INFO L78 Accepts]: Start accepts. Automaton has 21985 states and 77142 transitions. Word has length 36 [2021-03-11 00:25:32,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:25:32,111 INFO L480 AbstractCegarLoop]: Abstraction has 21985 states and 77142 transitions. [2021-03-11 00:25:32,111 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:25:32,111 INFO L276 IsEmpty]: Start isEmpty. Operand 21985 states and 77142 transitions. [2021-03-11 00:25:32,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-11 00:25:32,139 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:25:32,139 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:25:32,340 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:25:32,340 INFO L428 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:25:32,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:25:32,340 INFO L82 PathProgramCache]: Analyzing trace with hash 2045351476, now seen corresponding path program 84 times [2021-03-11 00:25:32,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:25:32,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257365472] [2021-03-11 00:25:32,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:25:32,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:25:32,629 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:32,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257365472] [2021-03-11 00:25:32,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160464123] [2021-03-11 00:25:32,629 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:25:32,651 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-11 00:25:32,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:25:32,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-11 00:25:32,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:25:33,378 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-11 00:25:33,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:25:33,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-03-11 00:25:33,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967621692] [2021-03-11 00:25:33,379 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:25:33,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:25:33,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:25:33,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:25:33,379 INFO L87 Difference]: Start difference. First operand 21985 states and 77142 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:25:41,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:25:41,748 INFO L93 Difference]: Finished difference Result 41550 states and 137477 transitions. [2021-03-11 00:25:41,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-03-11 00:25:41,753 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-03-11 00:25:41,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:25:41,855 INFO L225 Difference]: With dead ends: 41550 [2021-03-11 00:25:41,856 INFO L226 Difference]: Without dead ends: 41402 [2021-03-11 00:25:41,857 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4268 ImplicationChecksByTransitivity, 5709.7ms TimeCoverageRelationStatistics Valid=2115, Invalid=8805, Unknown=0, NotChecked=0, Total=10920 [2021-03-11 00:25:41,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41402 states. [2021-03-11 00:25:42,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41402 to 22283. [2021-03-11 00:25:42,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22283 states, 22282 states have (on average 3.4998204829009962) internal successors, (77983), 22282 states have internal predecessors, (77983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:25:42,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22283 states to 22283 states and 77983 transitions. [2021-03-11 00:25:42,580 INFO L78 Accepts]: Start accepts. Automaton has 22283 states and 77983 transitions. Word has length 36 [2021-03-11 00:25:42,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:25:42,580 INFO L480 AbstractCegarLoop]: Abstraction has 22283 states and 77983 transitions. [2021-03-11 00:25:42,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:25:42,580 INFO L276 IsEmpty]: Start isEmpty. Operand 22283 states and 77983 transitions. [2021-03-11 00:25:42,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-11 00:25:42,617 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:25:42,617 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:25:42,817 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:25:42,817 INFO L428 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:25:42,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:25:42,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1209334608, now seen corresponding path program 85 times [2021-03-11 00:25:42,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:25:42,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072852617] [2021-03-11 00:25:42,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:25:42,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:25:43,113 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:43,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072852617] [2021-03-11 00:25:43,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847480403] [2021-03-11 00:25:43,113 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:25:43,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:25:43,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-11 00:25:43,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:25:43,814 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:43,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:25:43,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-03-11 00:25:43,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320749799] [2021-03-11 00:25:43,814 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:25:43,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:25:43,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:25:43,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:25:43,815 INFO L87 Difference]: Start difference. First operand 22283 states and 77983 transitions. Second operand has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:25:47,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:25:47,346 INFO L93 Difference]: Finished difference Result 39920 states and 132787 transitions. [2021-03-11 00:25:47,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-03-11 00:25:47,350 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-03-11 00:25:47,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:25:47,443 INFO L225 Difference]: With dead ends: 39920 [2021-03-11 00:25:47,443 INFO L226 Difference]: Without dead ends: 39920 [2021-03-11 00:25:47,444 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 2155.6ms TimeCoverageRelationStatistics Valid=577, Invalid=1679, Unknown=0, NotChecked=0, Total=2256 [2021-03-11 00:25:47,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39920 states. [2021-03-11 00:25:48,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39920 to 22465. [2021-03-11 00:25:48,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22465 states, 22464 states have (on average 3.4959045584045585) internal successors, (78532), 22464 states have internal predecessors, (78532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:25:48,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22465 states to 22465 states and 78532 transitions. [2021-03-11 00:25:48,122 INFO L78 Accepts]: Start accepts. Automaton has 22465 states and 78532 transitions. Word has length 36 [2021-03-11 00:25:48,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:25:48,122 INFO L480 AbstractCegarLoop]: Abstraction has 22465 states and 78532 transitions. [2021-03-11 00:25:48,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:25:48,122 INFO L276 IsEmpty]: Start isEmpty. Operand 22465 states and 78532 transitions. [2021-03-11 00:25:48,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-11 00:25:48,157 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:25:48,157 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:25:48,357 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:25:48,357 INFO L428 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:25:48,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:25:48,358 INFO L82 PathProgramCache]: Analyzing trace with hash 18457400, now seen corresponding path program 86 times [2021-03-11 00:25:48,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:25:48,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385520958] [2021-03-11 00:25:48,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:25:48,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:25:48,701 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:48,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385520958] [2021-03-11 00:25:48,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104994480] [2021-03-11 00:25:48,702 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:25:48,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:25:48,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:25:48,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-11 00:25:48,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:25:49,372 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-11 00:25:49,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:25:49,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 18 [2021-03-11 00:25:49,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789898230] [2021-03-11 00:25:49,373 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:25:49,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:25:49,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:25:49,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:25:49,373 INFO L87 Difference]: Start difference. First operand 22465 states and 78532 transitions. Second operand has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:25:59,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:25:59,298 INFO L93 Difference]: Finished difference Result 40540 states and 134969 transitions. [2021-03-11 00:25:59,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2021-03-11 00:25:59,302 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-03-11 00:25:59,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:25:59,403 INFO L225 Difference]: With dead ends: 40540 [2021-03-11 00:25:59,404 INFO L226 Difference]: Without dead ends: 40452 [2021-03-11 00:25:59,405 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5449 ImplicationChecksByTransitivity, 7151.4ms TimeCoverageRelationStatistics Valid=2596, Invalid=10976, Unknown=0, NotChecked=0, Total=13572 [2021-03-11 00:25:59,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40452 states. [2021-03-11 00:26:00,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40452 to 21926. [2021-03-11 00:26:00,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21926 states, 21925 states have (on average 3.5023033067274802) internal successors, (76788), 21925 states have internal predecessors, (76788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:26:00,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21926 states to 21926 states and 76788 transitions. [2021-03-11 00:26:00,093 INFO L78 Accepts]: Start accepts. Automaton has 21926 states and 76788 transitions. Word has length 36 [2021-03-11 00:26:00,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:26:00,094 INFO L480 AbstractCegarLoop]: Abstraction has 21926 states and 76788 transitions. [2021-03-11 00:26:00,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:26:00,094 INFO L276 IsEmpty]: Start isEmpty. Operand 21926 states and 76788 transitions. [2021-03-11 00:26:00,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-11 00:26:00,133 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:26:00,133 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:26:00,333 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-03-11 00:26:00,333 INFO L428 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:26:00,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:26:00,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1058738612, now seen corresponding path program 87 times [2021-03-11 00:26:00,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:26:00,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058065189] [2021-03-11 00:26:00,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:26:00,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:26:00,666 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:00,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058065189] [2021-03-11 00:26:00,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639885484] [2021-03-11 00:26:00,667 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:26:00,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-11 00:26:00,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:26:00,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-11 00:26:00,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:26:01,492 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:01,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:26:01,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 18 [2021-03-11 00:26:01,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396352883] [2021-03-11 00:26:01,492 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:26:01,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:26:01,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:26:01,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:26:01,493 INFO L87 Difference]: Start difference. First operand 21926 states and 76788 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:26:05,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:26:05,817 INFO L93 Difference]: Finished difference Result 36897 states and 124356 transitions. [2021-03-11 00:26:05,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-03-11 00:26:05,821 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-03-11 00:26:05,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:26:05,911 INFO L225 Difference]: With dead ends: 36897 [2021-03-11 00:26:05,911 INFO L226 Difference]: Without dead ends: 36897 [2021-03-11 00:26:05,912 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 851 ImplicationChecksByTransitivity, 2751.8ms TimeCoverageRelationStatistics Valid=676, Invalid=2080, Unknown=0, NotChecked=0, Total=2756 [2021-03-11 00:26:05,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36897 states. [2021-03-11 00:26:06,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36897 to 22142. [2021-03-11 00:26:06,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22142 states, 22141 states have (on average 3.4994806015988438) internal successors, (77482), 22141 states have internal predecessors, (77482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:26:06,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22142 states to 22142 states and 77482 transitions. [2021-03-11 00:26:06,529 INFO L78 Accepts]: Start accepts. Automaton has 22142 states and 77482 transitions. Word has length 36 [2021-03-11 00:26:06,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:26:06,529 INFO L480 AbstractCegarLoop]: Abstraction has 22142 states and 77482 transitions. [2021-03-11 00:26:06,529 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:26:06,529 INFO L276 IsEmpty]: Start isEmpty. Operand 22142 states and 77482 transitions. [2021-03-11 00:26:06,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-11 00:26:06,558 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:26:06,558 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:26:06,758 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-03-11 00:26:06,758 INFO L428 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:26:06,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:26:06,759 INFO L82 PathProgramCache]: Analyzing trace with hash 2057609742, now seen corresponding path program 88 times [2021-03-11 00:26:06,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:26:06,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799978185] [2021-03-11 00:26:06,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:26:06,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:26:07,051 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:07,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799978185] [2021-03-11 00:26:07,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968405083] [2021-03-11 00:26:07,052 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:26:07,071 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:26:07,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:26:07,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-11 00:26:07,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:26:07,912 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-11 00:26:07,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:26:07,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-03-11 00:26:07,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956086399] [2021-03-11 00:26:07,913 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:26:07,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:26:07,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:26:07,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:26:07,913 INFO L87 Difference]: Start difference. First operand 22142 states and 77482 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:26:15,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:26:15,973 INFO L93 Difference]: Finished difference Result 36897 states and 124743 transitions. [2021-03-11 00:26:15,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-03-11 00:26:15,978 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-03-11 00:26:15,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:26:16,069 INFO L225 Difference]: With dead ends: 36897 [2021-03-11 00:26:16,069 INFO L226 Difference]: Without dead ends: 36841 [2021-03-11 00:26:16,070 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2958 ImplicationChecksByTransitivity, 5406.2ms TimeCoverageRelationStatistics Valid=1863, Invalid=6327, Unknown=0, NotChecked=0, Total=8190 [2021-03-11 00:26:16,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36841 states. [2021-03-11 00:26:16,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36841 to 21909. [2021-03-11 00:26:16,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21909 states, 21908 states have (on average 3.4994066094577323) internal successors, (76665), 21908 states have internal predecessors, (76665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:26:16,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21909 states to 21909 states and 76665 transitions. [2021-03-11 00:26:16,672 INFO L78 Accepts]: Start accepts. Automaton has 21909 states and 76665 transitions. Word has length 36 [2021-03-11 00:26:16,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:26:16,672 INFO L480 AbstractCegarLoop]: Abstraction has 21909 states and 76665 transitions. [2021-03-11 00:26:16,672 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:26:16,672 INFO L276 IsEmpty]: Start isEmpty. Operand 21909 states and 76665 transitions. [2021-03-11 00:26:16,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-11 00:26:16,707 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:26:16,707 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:26:16,907 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-03-11 00:26:16,907 INFO L428 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:26:16,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:26:16,908 INFO L82 PathProgramCache]: Analyzing trace with hash 30795628, now seen corresponding path program 89 times [2021-03-11 00:26:16,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:26:16,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692729642] [2021-03-11 00:26:16,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:26:16,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:26:17,210 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:17,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692729642] [2021-03-11 00:26:17,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446207665] [2021-03-11 00:26:17,210 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:26:17,234 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-11 00:26:17,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:26:17,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-11 00:26:17,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:26:17,959 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:17,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:26:17,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2021-03-11 00:26:17,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580594090] [2021-03-11 00:26:17,959 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:26:17,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:26:17,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:26:17,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:26:17,960 INFO L87 Difference]: Start difference. First operand 21909 states and 76665 transitions. Second operand has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:26:25,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:26:25,519 INFO L93 Difference]: Finished difference Result 42090 states and 141214 transitions. [2021-03-11 00:26:25,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-03-11 00:26:25,523 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-03-11 00:26:25,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:26:25,626 INFO L225 Difference]: With dead ends: 42090 [2021-03-11 00:26:25,626 INFO L226 Difference]: Without dead ends: 41974 [2021-03-11 00:26:25,627 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2752 ImplicationChecksByTransitivity, 4673.6ms TimeCoverageRelationStatistics Valid=1466, Invalid=6190, Unknown=0, NotChecked=0, Total=7656 [2021-03-11 00:26:25,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41974 states. [2021-03-11 00:26:26,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41974 to 21711. [2021-03-11 00:26:26,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21711 states, 21710 states have (on average 3.49355135882082) internal successors, (75845), 21710 states have internal predecessors, (75845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:26:26,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21711 states to 21711 states and 75845 transitions. [2021-03-11 00:26:26,333 INFO L78 Accepts]: Start accepts. Automaton has 21711 states and 75845 transitions. Word has length 36 [2021-03-11 00:26:26,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:26:26,333 INFO L480 AbstractCegarLoop]: Abstraction has 21711 states and 75845 transitions. [2021-03-11 00:26:26,333 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:26:26,333 INFO L276 IsEmpty]: Start isEmpty. Operand 21711 states and 75845 transitions. [2021-03-11 00:26:26,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-11 00:26:26,368 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:26:26,368 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:26:26,568 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-03-11 00:26:26,569 INFO L428 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:26:26,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:26:26,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1164442992, now seen corresponding path program 90 times [2021-03-11 00:26:26,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:26:26,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144220352] [2021-03-11 00:26:26,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:26:26,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:26:26,854 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:26,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144220352] [2021-03-11 00:26:26,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186710775] [2021-03-11 00:26:26,855 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:26:26,875 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-11 00:26:26,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:26:26,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-11 00:26:26,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:26:27,608 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-11 00:26:27,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:26:27,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 18 [2021-03-11 00:26:27,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639955841] [2021-03-11 00:26:27,608 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:26:27,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:26:27,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:26:27,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:26:27,609 INFO L87 Difference]: Start difference. First operand 21711 states and 75845 transitions. Second operand has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:26:36,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:26:36,648 INFO L93 Difference]: Finished difference Result 41883 states and 139985 transitions. [2021-03-11 00:26:36,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-03-11 00:26:36,653 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-03-11 00:26:36,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:26:36,755 INFO L225 Difference]: With dead ends: 41883 [2021-03-11 00:26:36,755 INFO L226 Difference]: Without dead ends: 41703 [2021-03-11 00:26:36,756 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4001 ImplicationChecksByTransitivity, 6035.3ms TimeCoverageRelationStatistics Valid=2013, Invalid=8907, Unknown=0, NotChecked=0, Total=10920 [2021-03-11 00:26:36,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41703 states. [2021-03-11 00:26:37,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41703 to 21727. [2021-03-11 00:26:37,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21727 states, 21726 states have (on average 3.493279941084415) internal successors, (75895), 21726 states have internal predecessors, (75895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:26:37,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21727 states to 21727 states and 75895 transitions. [2021-03-11 00:26:37,632 INFO L78 Accepts]: Start accepts. Automaton has 21727 states and 75895 transitions. Word has length 36 [2021-03-11 00:26:37,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:26:37,632 INFO L480 AbstractCegarLoop]: Abstraction has 21727 states and 75895 transitions. [2021-03-11 00:26:37,632 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:26:37,632 INFO L276 IsEmpty]: Start isEmpty. Operand 21727 states and 75895 transitions. [2021-03-11 00:26:37,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-11 00:26:37,670 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:26:37,670 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:26:37,871 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:26:37,871 INFO L428 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:26:37,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:26:37,871 INFO L82 PathProgramCache]: Analyzing trace with hash -592113680, now seen corresponding path program 91 times [2021-03-11 00:26:37,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:26:37,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954997073] [2021-03-11 00:26:37,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:26:37,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:26:38,225 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:38,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954997073] [2021-03-11 00:26:38,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676480237] [2021-03-11 00:26:38,226 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:26:38,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:26:38,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-11 00:26:38,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:26:39,322 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:39,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:26:39,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-03-11 00:26:39,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464270679] [2021-03-11 00:26:39,322 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-11 00:26:39,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:26:39,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-11 00:26:39,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:26:39,323 INFO L87 Difference]: Start difference. First operand 21727 states and 75895 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:26:45,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:26:45,563 INFO L93 Difference]: Finished difference Result 38182 states and 129423 transitions. [2021-03-11 00:26:45,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-03-11 00:26:45,567 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-03-11 00:26:45,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:26:45,664 INFO L225 Difference]: With dead ends: 38182 [2021-03-11 00:26:45,664 INFO L226 Difference]: Without dead ends: 38182 [2021-03-11 00:26:45,665 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1887 ImplicationChecksByTransitivity, 4529.8ms TimeCoverageRelationStatistics Valid=1260, Invalid=3996, Unknown=0, NotChecked=0, Total=5256 [2021-03-11 00:26:45,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38182 states. [2021-03-11 00:26:46,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38182 to 23401. [2021-03-11 00:26:46,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23401 states, 23400 states have (on average 3.504230769230769) internal successors, (81999), 23400 states have internal predecessors, (81999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:26:46,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23401 states to 23401 states and 81999 transitions. [2021-03-11 00:26:46,327 INFO L78 Accepts]: Start accepts. Automaton has 23401 states and 81999 transitions. Word has length 36 [2021-03-11 00:26:46,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:26:46,327 INFO L480 AbstractCegarLoop]: Abstraction has 23401 states and 81999 transitions. [2021-03-11 00:26:46,327 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:26:46,327 INFO L276 IsEmpty]: Start isEmpty. Operand 23401 states and 81999 transitions. [2021-03-11 00:26:46,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-11 00:26:46,367 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:26:46,367 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:26:46,568 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-03-11 00:26:46,568 INFO L428 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:26:46,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:26:46,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1687332880, now seen corresponding path program 92 times [2021-03-11 00:26:46,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:26:46,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833555565] [2021-03-11 00:26:46,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:26:46,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:26:46,882 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:46,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833555565] [2021-03-11 00:26:46,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736585592] [2021-03-11 00:26:46,883 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:26:46,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:26:46,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:26:46,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-11 00:26:46,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:26:47,737 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-11 00:26:47,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:26:47,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-03-11 00:26:47,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961419883] [2021-03-11 00:26:47,737 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:26:47,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:26:47,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:26:47,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:26:47,738 INFO L87 Difference]: Start difference. First operand 23401 states and 81999 transitions. Second operand has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:26:54,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:26:54,638 INFO L93 Difference]: Finished difference Result 38832 states and 131890 transitions. [2021-03-11 00:26:54,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-03-11 00:26:54,643 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-03-11 00:26:54,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:26:54,744 INFO L225 Difference]: With dead ends: 38832 [2021-03-11 00:26:54,745 INFO L226 Difference]: Without dead ends: 38784 [2021-03-11 00:26:54,745 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2440 ImplicationChecksByTransitivity, 5046.8ms TimeCoverageRelationStatistics Valid=1598, Invalid=5542, Unknown=0, NotChecked=0, Total=7140 [2021-03-11 00:26:54,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38784 states. [2021-03-11 00:26:55,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38784 to 23571. [2021-03-11 00:26:55,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23571 states, 23570 states have (on average 3.5004666949512093) internal successors, (82506), 23570 states have internal predecessors, (82506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:26:55,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23571 states to 23571 states and 82506 transitions. [2021-03-11 00:26:55,403 INFO L78 Accepts]: Start accepts. Automaton has 23571 states and 82506 transitions. Word has length 36 [2021-03-11 00:26:55,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:26:55,403 INFO L480 AbstractCegarLoop]: Abstraction has 23571 states and 82506 transitions. [2021-03-11 00:26:55,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:26:55,404 INFO L276 IsEmpty]: Start isEmpty. Operand 23571 states and 82506 transitions. [2021-03-11 00:26:55,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-11 00:26:55,442 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:26:55,442 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:26:55,643 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-03-11 00:26:55,644 INFO L428 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:26:55,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:26:55,644 INFO L82 PathProgramCache]: Analyzing trace with hash 102116908, now seen corresponding path program 93 times [2021-03-11 00:26:55,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:26:55,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717954389] [2021-03-11 00:26:55,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:26:55,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:26:55,964 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:26:55,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717954389] [2021-03-11 00:26:55,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419443004] [2021-03-11 00:26:55,964 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:26:55,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-11 00:26:55,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:26:55,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-11 00:26:55,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:26:56,886 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:26:56,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:26:56,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-03-11 00:26:56,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205956393] [2021-03-11 00:26:56,887 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:26:56,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:26:56,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:26:56,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:26:56,888 INFO L87 Difference]: Start difference. First operand 23571 states and 82506 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:27:03,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:27:03,568 INFO L93 Difference]: Finished difference Result 38917 states and 132129 transitions. [2021-03-11 00:27:03,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-03-11 00:27:03,573 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-03-11 00:27:03,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:27:03,679 INFO L225 Difference]: With dead ends: 38917 [2021-03-11 00:27:03,679 INFO L226 Difference]: Without dead ends: 38881 [2021-03-11 00:27:03,680 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1871 ImplicationChecksByTransitivity, 4224.3ms TimeCoverageRelationStatistics Valid=1166, Invalid=4384, Unknown=0, NotChecked=0, Total=5550 [2021-03-11 00:27:03,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38881 states. [2021-03-11 00:27:04,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38881 to 23801. [2021-03-11 00:27:04,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23801 states, 23800 states have (on average 3.496344537815126) internal successors, (83213), 23800 states have internal predecessors, (83213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:27:04,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23801 states to 23801 states and 83213 transitions. [2021-03-11 00:27:04,427 INFO L78 Accepts]: Start accepts. Automaton has 23801 states and 83213 transitions. Word has length 36 [2021-03-11 00:27:04,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:27:04,427 INFO L480 AbstractCegarLoop]: Abstraction has 23801 states and 83213 transitions. [2021-03-11 00:27:04,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:27:04,427 INFO L276 IsEmpty]: Start isEmpty. Operand 23801 states and 83213 transitions. [2021-03-11 00:27:04,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-11 00:27:04,459 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:27:04,459 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:27:04,663 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:27:04,663 INFO L428 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:27:04,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:27:04,664 INFO L82 PathProgramCache]: Analyzing trace with hash -181556176, now seen corresponding path program 94 times [2021-03-11 00:27:04,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:27:04,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210472937] [2021-03-11 00:27:04,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:27:04,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:27:05,029 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:27:05,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210472937] [2021-03-11 00:27:05,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325258000] [2021-03-11 00:27:05,029 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:27:05,049 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:27:05,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:27:05,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-11 00:27:05,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:27:05,973 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-11 00:27:05,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:27:05,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-03-11 00:27:05,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328609231] [2021-03-11 00:27:05,973 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:27:05,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:27:05,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:27:05,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:27:05,974 INFO L87 Difference]: Start difference. First operand 23801 states and 83213 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:27:12,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:27:12,863 INFO L93 Difference]: Finished difference Result 38829 states and 131925 transitions. [2021-03-11 00:27:12,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-03-11 00:27:12,868 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-03-11 00:27:12,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:27:12,967 INFO L225 Difference]: With dead ends: 38829 [2021-03-11 00:27:12,968 INFO L226 Difference]: Without dead ends: 38769 [2021-03-11 00:27:12,968 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2000 ImplicationChecksByTransitivity, 4396.6ms TimeCoverageRelationStatistics Valid=1274, Invalid=4732, Unknown=0, NotChecked=0, Total=6006 [2021-03-11 00:27:13,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38769 states. [2021-03-11 00:27:13,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38769 to 23801. [2021-03-11 00:27:13,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23801 states, 23800 states have (on average 3.4960084033613446) internal successors, (83205), 23800 states have internal predecessors, (83205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:27:13,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23801 states to 23801 states and 83205 transitions. [2021-03-11 00:27:13,746 INFO L78 Accepts]: Start accepts. Automaton has 23801 states and 83205 transitions. Word has length 36 [2021-03-11 00:27:13,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:27:13,746 INFO L480 AbstractCegarLoop]: Abstraction has 23801 states and 83205 transitions. [2021-03-11 00:27:13,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:27:13,747 INFO L276 IsEmpty]: Start isEmpty. Operand 23801 states and 83205 transitions. [2021-03-11 00:27:13,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-11 00:27:13,790 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:27:13,790 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:27:13,990 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:27:13,990 INFO L428 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:27:13,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:27:13,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1336665204, now seen corresponding path program 95 times [2021-03-11 00:27:13,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:27:13,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571812152] [2021-03-11 00:27:13,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:27:13,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:27:14,229 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:27:14,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571812152] [2021-03-11 00:27:14,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111631776] [2021-03-11 00:27:14,230 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:27:14,251 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-11 00:27:14,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:27:14,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-11 00:27:14,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:27:15,312 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:27:15,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:27:15,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-03-11 00:27:15,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449180530] [2021-03-11 00:27:15,313 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:27:15,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:27:15,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:27:15,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:27:15,313 INFO L87 Difference]: Start difference. First operand 23801 states and 83205 transitions. Second operand has 20 states, 20 states have (on average 2.8) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:27:20,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:27:20,524 INFO L93 Difference]: Finished difference Result 44469 states and 150379 transitions. [2021-03-11 00:27:20,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-03-11 00:27:20,528 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-03-11 00:27:20,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:27:20,611 INFO L225 Difference]: With dead ends: 44469 [2021-03-11 00:27:20,612 INFO L226 Difference]: Without dead ends: 44469 [2021-03-11 00:27:20,612 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 3004.5ms TimeCoverageRelationStatistics Valid=704, Invalid=2266, Unknown=0, NotChecked=0, Total=2970 [2021-03-11 00:27:20,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44469 states. [2021-03-11 00:27:21,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44469 to 24155. [2021-03-11 00:27:21,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24155 states, 24154 states have (on average 3.4910987828103006) internal successors, (84324), 24154 states have internal predecessors, (84324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:27:21,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24155 states to 24155 states and 84324 transitions. [2021-03-11 00:27:21,514 INFO L78 Accepts]: Start accepts. Automaton has 24155 states and 84324 transitions. Word has length 36 [2021-03-11 00:27:21,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:27:21,514 INFO L480 AbstractCegarLoop]: Abstraction has 24155 states and 84324 transitions. [2021-03-11 00:27:21,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:27:21,514 INFO L276 IsEmpty]: Start isEmpty. Operand 24155 states and 84324 transitions. [2021-03-11 00:27:21,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-11 00:27:21,555 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:27:21,555 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:27:21,756 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:27:21,756 INFO L428 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:27:21,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:27:21,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1185682570, now seen corresponding path program 96 times [2021-03-11 00:27:21,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:27:21,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924122176] [2021-03-11 00:27:21,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:27:21,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:27:22,062 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:27:22,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924122176] [2021-03-11 00:27:22,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680265755] [2021-03-11 00:27:22,062 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:27:22,085 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-11 00:27:22,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:27:22,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-11 00:27:22,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:27:23,244 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:27:23,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:27:23,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-03-11 00:27:23,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150636935] [2021-03-11 00:27:23,245 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:27:23,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:27:23,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:27:23,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:27:23,245 INFO L87 Difference]: Start difference. First operand 24155 states and 84324 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:27:27,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:27:27,095 INFO L93 Difference]: Finished difference Result 43602 states and 147506 transitions. [2021-03-11 00:27:27,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-03-11 00:27:27,099 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-03-11 00:27:27,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:27:27,214 INFO L225 Difference]: With dead ends: 43602 [2021-03-11 00:27:27,214 INFO L226 Difference]: Without dead ends: 43602 [2021-03-11 00:27:27,214 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 2481.8ms TimeCoverageRelationStatistics Valid=501, Invalid=1661, Unknown=0, NotChecked=0, Total=2162 [2021-03-11 00:27:27,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43602 states. [2021-03-11 00:27:28,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43602 to 24507. [2021-03-11 00:27:28,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24507 states, 24506 states have (on average 3.486574716395985) internal successors, (85442), 24506 states have internal predecessors, (85442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:27:28,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24507 states to 24507 states and 85442 transitions. [2021-03-11 00:27:28,235 INFO L78 Accepts]: Start accepts. Automaton has 24507 states and 85442 transitions. Word has length 36 [2021-03-11 00:27:28,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:27:28,236 INFO L480 AbstractCegarLoop]: Abstraction has 24507 states and 85442 transitions. [2021-03-11 00:27:28,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:27:28,236 INFO L276 IsEmpty]: Start isEmpty. Operand 24507 states and 85442 transitions. [2021-03-11 00:27:28,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-11 00:27:28,282 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:27:28,282 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:27:28,483 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2021-03-11 00:27:28,483 INFO L428 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:27:28,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:27:28,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1486246796, now seen corresponding path program 97 times [2021-03-11 00:27:28,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:27:28,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893602965] [2021-03-11 00:27:28,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:27:28,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:27:28,725 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:27:28,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893602965] [2021-03-11 00:27:28,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11270242] [2021-03-11 00:27:28,725 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:27:28,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:27:28,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-11 00:27:28,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:27:29,852 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:27:29,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:27:29,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-03-11 00:27:29,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121639551] [2021-03-11 00:27:29,853 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:27:29,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:27:29,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:27:29,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:27:29,853 INFO L87 Difference]: Start difference. First operand 24507 states and 85442 transitions. Second operand has 20 states, 20 states have (on average 2.8) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:27:34,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:27:34,540 INFO L93 Difference]: Finished difference Result 49231 states and 166293 transitions. [2021-03-11 00:27:34,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-11 00:27:34,545 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-03-11 00:27:34,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:27:34,709 INFO L225 Difference]: With dead ends: 49231 [2021-03-11 00:27:34,709 INFO L226 Difference]: Without dead ends: 49231 [2021-03-11 00:27:34,709 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 2442.4ms TimeCoverageRelationStatistics Valid=509, Invalid=1653, Unknown=0, NotChecked=0, Total=2162 [2021-03-11 00:27:34,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49231 states. [2021-03-11 00:27:35,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49231 to 25053. [2021-03-11 00:27:35,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25053 states, 25052 states have (on average 3.4985230720102187) internal successors, (87645), 25052 states have internal predecessors, (87645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:27:35,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25053 states to 25053 states and 87645 transitions. [2021-03-11 00:27:35,600 INFO L78 Accepts]: Start accepts. Automaton has 25053 states and 87645 transitions. Word has length 36 [2021-03-11 00:27:35,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:27:35,600 INFO L480 AbstractCegarLoop]: Abstraction has 25053 states and 87645 transitions. [2021-03-11 00:27:35,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:27:35,600 INFO L276 IsEmpty]: Start isEmpty. Operand 25053 states and 87645 transitions. [2021-03-11 00:27:35,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-11 00:27:35,641 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:27:35,641 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:27:35,841 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-03-11 00:27:35,842 INFO L428 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:27:35,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:27:35,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1637229430, now seen corresponding path program 98 times [2021-03-11 00:27:35,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:27:35,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392802194] [2021-03-11 00:27:35,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:27:35,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:27:36,171 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:27:36,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392802194] [2021-03-11 00:27:36,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341630888] [2021-03-11 00:27:36,172 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:27:36,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:27:36,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:27:36,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-11 00:27:36,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:27:37,449 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:27:37,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:27:37,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-03-11 00:27:37,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691915044] [2021-03-11 00:27:37,449 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-11 00:27:37,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:27:37,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-11 00:27:37,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-03-11 00:27:37,450 INFO L87 Difference]: Start difference. First operand 25053 states and 87645 transitions. Second operand has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 22 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-03-11 00:27:38,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-11 00:27:38,787 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-03-11 00:27:38,787 WARN L545 AbstractCegarLoop]: Verification canceled [2021-03-11 00:27:38,791 WARN L224 ceAbstractionStarter]: Timeout [2021-03-11 00:27:38,792 INFO L202 PluginConnector]: Adding new model parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.03 12:27:38 BasicIcfg [2021-03-11 00:27:38,792 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-11 00:27:38,793 INFO L168 Benchmark]: Toolchain (without parser) took 813199.20 ms. Allocated memory was 255.9 MB in the beginning and 5.0 GB in the end (delta: 4.8 GB). Free memory was 236.4 MB in the beginning and 2.7 GB in the end (delta: -2.4 GB). Peak memory consumption was 2.4 GB. Max. memory is 16.0 GB. [2021-03-11 00:27:38,793 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 255.9 MB. Free memory is still 237.5 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 00:27:38,793 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.14 ms. Allocated memory is still 255.9 MB. Free memory was 236.0 MB in the beginning and 234.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-11 00:27:38,793 INFO L168 Benchmark]: Boogie Preprocessor took 17.48 ms. Allocated memory is still 255.9 MB. Free memory was 234.5 MB in the beginning and 233.5 MB in the end (delta: 997.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-11 00:27:38,793 INFO L168 Benchmark]: RCFGBuilder took 308.61 ms. Allocated memory is still 255.9 MB. Free memory was 233.5 MB in the beginning and 235.3 MB in the end (delta: -1.8 MB). Peak memory consumption was 16.6 MB. Max. memory is 16.0 GB. [2021-03-11 00:27:38,793 INFO L168 Benchmark]: TraceAbstraction took 812837.24 ms. Allocated memory was 255.9 MB in the beginning and 5.0 GB in the end (delta: 4.8 GB). Free memory was 234.6 MB in the beginning and 2.7 GB in the end (delta: -2.4 GB). Peak memory consumption was 2.3 GB. Max. memory is 16.0 GB. [2021-03-11 00:27:38,794 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 0.20 ms. Allocated memory is still 255.9 MB. Free memory is still 237.5 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 27.14 ms. Allocated memory is still 255.9 MB. Free memory was 236.0 MB in the beginning and 234.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 17.48 ms. Allocated memory is still 255.9 MB. Free memory was 234.5 MB in the beginning and 233.5 MB in the end (delta: 997.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 308.61 ms. Allocated memory is still 255.9 MB. Free memory was 233.5 MB in the beginning and 235.3 MB in the end (delta: -1.8 MB). Peak memory consumption was 16.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 812837.24 ms. Allocated memory was 255.9 MB in the beginning and 5.0 GB in the end (delta: 4.8 GB). Free memory was 234.6 MB in the beginning and 2.7 GB in the end (delta: -2.4 GB). Peak memory consumption was 2.3 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 67]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 67). Cancelled while BasicCegarLoop was constructing difference of abstraction (25053states) and FLOYD_HOARE automaton (currently 11 states, 22 states before enhancement),while ReachableStatesComputation was computing reachable states (221 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 812667.5ms, OverallIterations: 146, TraceHistogramMax: 5, EmptinessCheckTime: 2805.7ms, AutomataDifference: 621683.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 63.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 9646 SDtfs, 75927 SDslu, 95767 SDs, 0 SdLazy, 126048 SolverSat, 12619 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 95460.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14567 GetRequests, 3913 SyntacticMatches, 58 SemanticMatches, 10596 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357517 ImplicationChecksByTransitivity, 424748.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=25053occurred in iteration=145, InterpolantAutomatonStates: 9947, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 48399.8ms AutomataMinimizationTime, 145 MinimizatonAttempts, 1443255 StatesRemovedByMinimization, 144 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 541.2ms SsaConstructionTime, 1646.5ms SatisfiabilityAnalysisTime, 105281.1ms InterpolantComputationTime, 9562 NumberOfCodeBlocks, 9542 NumberOfCodeBlocksAsserted, 617 NumberOfCheckSat, 9272 ConstructedInterpolants, 261 QuantifiedInterpolants, 72626 SizeOfPredicates, 536 NumberOfNonLiveVariables, 10056 ConjunctsInSsa, 1643 ConjunctsInUnsatCore, 290 InterpolantComputations, 2 PerfectInterpolantSequences, 2507/6377 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