/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/mcr/example_5.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9b7772ad7705253c1305067fc38dc9bc7271fbe3-9b7772a [2021-04-15 02:00:21,323 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-04-15 02:00:21,324 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-04-15 02:00:21,356 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-04-15 02:00:21,402 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 [2021-04-15 02:00:21,428 INFO L113 SettingsManager]: Loading preferences was successful [2021-04-15 02:00:21,428 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-04-15 02:00:21,429 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-04-15 02:00:21,429 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-04-15 02:00:21,431 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-04-15 02:00:21,431 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-04-15 02:00:21,431 INFO L138 SettingsManager]: * Use SBE=true [2021-04-15 02:00:21,431 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-04-15 02:00:21,431 INFO L138 SettingsManager]: * sizeof long=4 [2021-04-15 02:00:21,431 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-04-15 02:00:21,432 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-04-15 02:00:21,432 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-04-15 02:00:21,432 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-04-15 02:00:21,432 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-04-15 02:00:21,432 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-04-15 02:00:21,432 INFO L138 SettingsManager]: * sizeof long double=12 [2021-04-15 02:00:21,433 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-04-15 02:00:21,433 INFO L138 SettingsManager]: * Use constant arrays=true [2021-04-15 02:00:21,433 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-04-15 02:00:21,433 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-04-15 02:00:21,433 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-04-15 02:00:21,433 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-04-15 02:00:21,433 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-04-15 02:00:21,433 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-15 02:00:21,433 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-04-15 02:00:21,434 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-04-15 02:00:21,434 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-04-15 02:00:21,434 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-04-15 02:00:21,434 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-04-15 02:00:21,434 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-04-15 02:00:21,434 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-04-15 02:00:21,434 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-04-15 02:00:21,677 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-04-15 02:00:21,697 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-04-15 02:00:21,699 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-04-15 02:00:21,699 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-04-15 02:00:21,701 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-04-15 02:00:21,701 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/mcr/example_5.bpl [2021-04-15 02:00:21,702 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/mcr/example_5.bpl' [2021-04-15 02:00:21,745 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-04-15 02:00:21,746 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-04-15 02:00:21,747 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-04-15 02:00:21,747 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-04-15 02:00:21,747 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-04-15 02:00:21,755 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "example_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:00:21" (1/1) ... [2021-04-15 02:00:21,763 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "example_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:00:21" (1/1) ... [2021-04-15 02:00:21,767 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-04-15 02:00:21,769 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-04-15 02:00:21,769 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-04-15 02:00:21,770 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-04-15 02:00:21,775 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "example_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:00:21" (1/1) ... [2021-04-15 02:00:21,775 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "example_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:00:21" (1/1) ... [2021-04-15 02:00:21,775 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "example_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:00:21" (1/1) ... [2021-04-15 02:00:21,776 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "example_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:00:21" (1/1) ... [2021-04-15 02:00:21,777 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "example_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:00:21" (1/1) ... [2021-04-15 02:00:21,778 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "example_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:00:21" (1/1) ... [2021-04-15 02:00:21,779 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "example_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:00:21" (1/1) ... [2021-04-15 02:00:21,779 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-04-15 02:00:21,780 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-04-15 02:00:21,780 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-04-15 02:00:21,780 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-04-15 02:00:21,781 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "example_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:00:21" (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 [2021-04-15 02:00:21,833 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_1 given in one single declaration [2021-04-15 02:00:21,834 INFO L130 BoogieDeclarations]: Found specification of procedure set_1 [2021-04-15 02:00:21,834 INFO L138 BoogieDeclarations]: Found implementation of procedure set_1 [2021-04-15 02:00:21,834 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_2 given in one single declaration [2021-04-15 02:00:21,834 INFO L130 BoogieDeclarations]: Found specification of procedure set_2 [2021-04-15 02:00:21,835 INFO L138 BoogieDeclarations]: Found implementation of procedure set_2 [2021-04-15 02:00:21,835 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_3 given in one single declaration [2021-04-15 02:00:21,835 INFO L130 BoogieDeclarations]: Found specification of procedure set_3 [2021-04-15 02:00:21,835 INFO L138 BoogieDeclarations]: Found implementation of procedure set_3 [2021-04-15 02:00:21,835 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_4 given in one single declaration [2021-04-15 02:00:21,835 INFO L130 BoogieDeclarations]: Found specification of procedure set_4 [2021-04-15 02:00:21,835 INFO L138 BoogieDeclarations]: Found implementation of procedure set_4 [2021-04-15 02:00:21,836 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_0 given in one single declaration [2021-04-15 02:00:21,836 INFO L130 BoogieDeclarations]: Found specification of procedure set_0 [2021-04-15 02:00:21,836 INFO L138 BoogieDeclarations]: Found implementation of procedure set_0 [2021-04-15 02:00:21,836 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-04-15 02:00:21,837 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-04-15 02:00:21,837 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-04-15 02:00:21,837 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-04-15 02:00:21,975 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-04-15 02:00:21,975 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-04-15 02:00:21,976 INFO L202 PluginConnector]: Adding new model example_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 02:00:21 BoogieIcfgContainer [2021-04-15 02:00:21,977 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-04-15 02:00:21,979 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-04-15 02:00:21,979 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-04-15 02:00:21,981 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-04-15 02:00:21,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:00:21" (1/2) ... [2021-04-15 02:00:21,982 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39310ea9 and model type example_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.04 02:00:21, skipping insertion in model container [2021-04-15 02:00:21,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 02:00:21" (2/2) ... [2021-04-15 02:00:21,983 INFO L111 eAbstractionObserver]: Analyzing ICFG example_5.bpl [2021-04-15 02:00:21,988 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-04-15 02:00:21,988 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-04-15 02:00:21,990 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-04-15 02:00:21,991 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-04-15 02:00:22,086 INFO L149 ThreadInstanceAdder]: Constructed 25 joinOtherThreadTransitions. [2021-04-15 02:00:22,096 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-04-15 02:00:22,108 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-04-15 02:00:22,108 INFO L377 AbstractCegarLoop]: Hoare is true [2021-04-15 02:00:22,108 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-04-15 02:00:22,108 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-04-15 02:00:22,108 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-04-15 02:00:22,108 INFO L381 AbstractCegarLoop]: Difference is false [2021-04-15 02:00:22,108 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-04-15 02:00:22,108 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-04-15 02:00:22,114 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 44 places, 48 transitions, 196 flow [2021-04-15 02:00:22,186 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1148 states, 1146 states have (on average 3.7068062827225132) internal successors, (4248), 1147 states have internal predecessors, (4248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:22,190 INFO L276 IsEmpty]: Start isEmpty. Operand has 1148 states, 1146 states have (on average 3.7068062827225132) internal successors, (4248), 1147 states have internal predecessors, (4248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:22,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:22,208 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:22,209 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:22,209 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:22,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:22,215 INFO L82 PathProgramCache]: Analyzing trace with hash -794882208, now seen corresponding path program 1 times [2021-04-15 02:00:22,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:22,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151215944] [2021-04-15 02:00:22,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:22,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:22,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:22,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151215944] [2021-04-15 02:00:22,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:22,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-15 02:00:22,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700603397] [2021-04-15 02:00:22,370 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-04-15 02:00:22,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:22,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-04-15 02:00:22,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-15 02:00:22,386 INFO L87 Difference]: Start difference. First operand has 1148 states, 1146 states have (on average 3.7068062827225132) internal successors, (4248), 1147 states have internal predecessors, (4248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:22,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:22,431 INFO L93 Difference]: Finished difference Result 959 states and 3411 transitions. [2021-04-15 02:00:22,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-04-15 02:00:22,432 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:22,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:22,456 INFO L225 Difference]: With dead ends: 959 [2021-04-15 02:00:22,456 INFO L226 Difference]: Without dead ends: 957 [2021-04-15 02:00:22,457 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-15 02:00:22,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2021-04-15 02:00:22,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 957. [2021-04-15 02:00:22,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.5658995815899583) internal successors, (3409), 956 states have internal predecessors, (3409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:22,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3409 transitions. [2021-04-15 02:00:22,531 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3409 transitions. Word has length 21 [2021-04-15 02:00:22,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:22,532 INFO L480 AbstractCegarLoop]: Abstraction has 957 states and 3409 transitions. [2021-04-15 02:00:22,532 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:22,532 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3409 transitions. [2021-04-15 02:00:22,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:22,535 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:22,535 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:22,535 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-04-15 02:00:22,535 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:22,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:22,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1132663268, now seen corresponding path program 1 times [2021-04-15 02:00:22,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:22,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566293279] [2021-04-15 02:00:22,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:22,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:22,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:22,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566293279] [2021-04-15 02:00:22,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:22,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-15 02:00:22,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022189538] [2021-04-15 02:00:22,560 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-04-15 02:00:22,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:22,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-04-15 02:00:22,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-15 02:00:22,561 INFO L87 Difference]: Start difference. First operand 957 states and 3409 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:22,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:22,578 INFO L93 Difference]: Finished difference Result 741 states and 2572 transitions. [2021-04-15 02:00:22,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-04-15 02:00:22,579 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:22,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:22,584 INFO L225 Difference]: With dead ends: 741 [2021-04-15 02:00:22,584 INFO L226 Difference]: Without dead ends: 741 [2021-04-15 02:00:22,585 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-15 02:00:22,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2021-04-15 02:00:22,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 741. [2021-04-15 02:00:22,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 741 states, 740 states have (on average 3.4756756756756757) internal successors, (2572), 740 states have internal predecessors, (2572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:22,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 2572 transitions. [2021-04-15 02:00:22,614 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 2572 transitions. Word has length 21 [2021-04-15 02:00:22,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:22,615 INFO L480 AbstractCegarLoop]: Abstraction has 741 states and 2572 transitions. [2021-04-15 02:00:22,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:22,615 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 2572 transitions. [2021-04-15 02:00:22,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:22,617 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:22,617 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:22,617 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-04-15 02:00:22,618 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:22,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:22,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1383419134, now seen corresponding path program 1 times [2021-04-15 02:00:22,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:22,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534215426] [2021-04-15 02:00:22,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:22,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:22,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:22,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534215426] [2021-04-15 02:00:22,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:22,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-15 02:00:22,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131228812] [2021-04-15 02:00:22,655 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-04-15 02:00:22,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:22,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-04-15 02:00:22,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-15 02:00:22,656 INFO L87 Difference]: Start difference. First operand 741 states and 2572 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:22,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:22,665 INFO L93 Difference]: Finished difference Result 567 states and 1945 transitions. [2021-04-15 02:00:22,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-04-15 02:00:22,666 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:22,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:22,668 INFO L225 Difference]: With dead ends: 567 [2021-04-15 02:00:22,668 INFO L226 Difference]: Without dead ends: 567 [2021-04-15 02:00:22,669 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-15 02:00:22,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-04-15 02:00:22,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 567. [2021-04-15 02:00:22,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 566 states have (on average 3.4363957597173145) internal successors, (1945), 566 states have internal predecessors, (1945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:22,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 1945 transitions. [2021-04-15 02:00:22,683 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 1945 transitions. Word has length 21 [2021-04-15 02:00:22,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:22,683 INFO L480 AbstractCegarLoop]: Abstraction has 567 states and 1945 transitions. [2021-04-15 02:00:22,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:22,684 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 1945 transitions. [2021-04-15 02:00:22,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:22,685 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:22,685 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:22,685 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-04-15 02:00:22,685 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:22,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:22,686 INFO L82 PathProgramCache]: Analyzing trace with hash 609363394, now seen corresponding path program 1 times [2021-04-15 02:00:22,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:22,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457606143] [2021-04-15 02:00:22,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:22,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:22,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:22,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457606143] [2021-04-15 02:00:22,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:22,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:22,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424770980] [2021-04-15 02:00:22,826 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:22,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:22,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:22,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:22,827 INFO L87 Difference]: Start difference. First operand 567 states and 1945 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:22,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:22,893 INFO L93 Difference]: Finished difference Result 1267 states and 4072 transitions. [2021-04-15 02:00:22,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:22,894 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:22,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:22,898 INFO L225 Difference]: With dead ends: 1267 [2021-04-15 02:00:22,898 INFO L226 Difference]: Without dead ends: 1133 [2021-04-15 02:00:22,899 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 94.6ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:22,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1133 states. [2021-04-15 02:00:22,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1133 to 616. [2021-04-15 02:00:22,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 615 states have (on average 3.4) internal successors, (2091), 615 states have internal predecessors, (2091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:22,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 2091 transitions. [2021-04-15 02:00:22,918 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 2091 transitions. Word has length 21 [2021-04-15 02:00:22,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:22,918 INFO L480 AbstractCegarLoop]: Abstraction has 616 states and 2091 transitions. [2021-04-15 02:00:22,918 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:22,918 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 2091 transitions. [2021-04-15 02:00:22,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:22,919 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:22,920 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:22,920 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-04-15 02:00:22,920 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:22,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:22,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1140904574, now seen corresponding path program 2 times [2021-04-15 02:00:22,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:22,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978140385] [2021-04-15 02:00:22,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:22,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:23,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:23,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978140385] [2021-04-15 02:00:23,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:23,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:23,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143202480] [2021-04-15 02:00:23,027 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:23,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:23,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:23,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:23,028 INFO L87 Difference]: Start difference. First operand 616 states and 2091 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:23,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:23,093 INFO L93 Difference]: Finished difference Result 1250 states and 3995 transitions. [2021-04-15 02:00:23,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:23,094 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:23,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:23,098 INFO L225 Difference]: With dead ends: 1250 [2021-04-15 02:00:23,099 INFO L226 Difference]: Without dead ends: 1098 [2021-04-15 02:00:23,099 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 79.6ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:23,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1098 states. [2021-04-15 02:00:23,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1098 to 581. [2021-04-15 02:00:23,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581 states, 580 states have (on average 3.420689655172414) internal successors, (1984), 580 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:23,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 1984 transitions. [2021-04-15 02:00:23,120 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 1984 transitions. Word has length 21 [2021-04-15 02:00:23,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:23,120 INFO L480 AbstractCegarLoop]: Abstraction has 581 states and 1984 transitions. [2021-04-15 02:00:23,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:23,121 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 1984 transitions. [2021-04-15 02:00:23,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:23,122 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:23,122 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:23,122 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-04-15 02:00:23,122 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:23,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:23,122 INFO L82 PathProgramCache]: Analyzing trace with hash 213760410, now seen corresponding path program 3 times [2021-04-15 02:00:23,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:23,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558626051] [2021-04-15 02:00:23,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:23,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:23,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:23,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558626051] [2021-04-15 02:00:23,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:23,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:23,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918753299] [2021-04-15 02:00:23,209 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:23,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:23,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:23,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:23,210 INFO L87 Difference]: Start difference. First operand 581 states and 1984 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:23,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:23,257 INFO L93 Difference]: Finished difference Result 1207 states and 3862 transitions. [2021-04-15 02:00:23,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:23,257 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:23,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:23,261 INFO L225 Difference]: With dead ends: 1207 [2021-04-15 02:00:23,261 INFO L226 Difference]: Without dead ends: 1104 [2021-04-15 02:00:23,262 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 77.5ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:23,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1104 states. [2021-04-15 02:00:23,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1104 to 601. [2021-04-15 02:00:23,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 600 states have (on average 3.4066666666666667) internal successors, (2044), 600 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:23,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 2044 transitions. [2021-04-15 02:00:23,278 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 2044 transitions. Word has length 21 [2021-04-15 02:00:23,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:23,278 INFO L480 AbstractCegarLoop]: Abstraction has 601 states and 2044 transitions. [2021-04-15 02:00:23,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:23,278 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 2044 transitions. [2021-04-15 02:00:23,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:23,279 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:23,279 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:23,279 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-04-15 02:00:23,279 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:23,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:23,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1651666564, now seen corresponding path program 4 times [2021-04-15 02:00:23,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:23,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793336891] [2021-04-15 02:00:23,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:23,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:23,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:23,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793336891] [2021-04-15 02:00:23,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:23,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:23,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002510290] [2021-04-15 02:00:23,353 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:23,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:23,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:23,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:23,353 INFO L87 Difference]: Start difference. First operand 601 states and 2044 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:23,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:23,390 INFO L93 Difference]: Finished difference Result 1238 states and 3949 transitions. [2021-04-15 02:00:23,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:23,391 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:23,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:23,395 INFO L225 Difference]: With dead ends: 1238 [2021-04-15 02:00:23,395 INFO L226 Difference]: Without dead ends: 1084 [2021-04-15 02:00:23,396 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 63.2ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:23,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1084 states. [2021-04-15 02:00:23,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1084 to 581. [2021-04-15 02:00:23,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581 states, 580 states have (on average 3.4034482758620688) internal successors, (1974), 580 states have internal predecessors, (1974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:23,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 1974 transitions. [2021-04-15 02:00:23,413 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 1974 transitions. Word has length 21 [2021-04-15 02:00:23,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:23,413 INFO L480 AbstractCegarLoop]: Abstraction has 581 states and 1974 transitions. [2021-04-15 02:00:23,413 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:23,413 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 1974 transitions. [2021-04-15 02:00:23,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:23,414 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:23,415 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:23,415 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-04-15 02:00:23,415 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:23,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:23,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1790028250, now seen corresponding path program 5 times [2021-04-15 02:00:23,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:23,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643540079] [2021-04-15 02:00:23,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:23,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:23,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:23,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643540079] [2021-04-15 02:00:23,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:23,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:23,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197717366] [2021-04-15 02:00:23,483 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:23,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:23,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:23,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:23,483 INFO L87 Difference]: Start difference. First operand 581 states and 1974 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:23,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:23,527 INFO L93 Difference]: Finished difference Result 1182 states and 3774 transitions. [2021-04-15 02:00:23,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:23,527 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:23,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:23,532 INFO L225 Difference]: With dead ends: 1182 [2021-04-15 02:00:23,532 INFO L226 Difference]: Without dead ends: 1079 [2021-04-15 02:00:23,532 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 64.7ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:23,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1079 states. [2021-04-15 02:00:23,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1079 to 593. [2021-04-15 02:00:23,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 3.3885135135135136) internal successors, (2006), 592 states have internal predecessors, (2006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:23,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 2006 transitions. [2021-04-15 02:00:23,547 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 2006 transitions. Word has length 21 [2021-04-15 02:00:23,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:23,548 INFO L480 AbstractCegarLoop]: Abstraction has 593 states and 2006 transitions. [2021-04-15 02:00:23,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:23,548 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 2006 transitions. [2021-04-15 02:00:23,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:23,549 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:23,549 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:23,549 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-04-15 02:00:23,549 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:23,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:23,549 INFO L82 PathProgramCache]: Analyzing trace with hash 856912858, now seen corresponding path program 6 times [2021-04-15 02:00:23,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:23,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246755684] [2021-04-15 02:00:23,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:23,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:23,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:23,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246755684] [2021-04-15 02:00:23,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:23,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:23,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055499449] [2021-04-15 02:00:23,609 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:23,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:23,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:23,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:23,610 INFO L87 Difference]: Start difference. First operand 593 states and 2006 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:23,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:23,670 INFO L93 Difference]: Finished difference Result 1196 states and 3811 transitions. [2021-04-15 02:00:23,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:23,670 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:23,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:23,674 INFO L225 Difference]: With dead ends: 1196 [2021-04-15 02:00:23,674 INFO L226 Difference]: Without dead ends: 1053 [2021-04-15 02:00:23,675 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 70.1ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:23,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1053 states. [2021-04-15 02:00:23,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1053 to 567. [2021-04-15 02:00:23,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 566 states have (on average 3.4240282685512367) internal successors, (1938), 566 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:23,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 1938 transitions. [2021-04-15 02:00:23,695 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 1938 transitions. Word has length 21 [2021-04-15 02:00:23,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:23,695 INFO L480 AbstractCegarLoop]: Abstraction has 567 states and 1938 transitions. [2021-04-15 02:00:23,696 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:23,696 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 1938 transitions. [2021-04-15 02:00:23,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:23,698 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:23,698 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:23,698 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-04-15 02:00:23,698 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:23,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:23,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1393795936, now seen corresponding path program 7 times [2021-04-15 02:00:23,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:23,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737528553] [2021-04-15 02:00:23,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:23,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:23,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:23,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737528553] [2021-04-15 02:00:23,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:23,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:23,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147832030] [2021-04-15 02:00:23,784 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:23,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:23,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:23,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:23,785 INFO L87 Difference]: Start difference. First operand 567 states and 1938 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:23,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:23,836 INFO L93 Difference]: Finished difference Result 1298 states and 4181 transitions. [2021-04-15 02:00:23,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:23,837 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:23,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:23,841 INFO L225 Difference]: With dead ends: 1298 [2021-04-15 02:00:23,841 INFO L226 Difference]: Without dead ends: 1164 [2021-04-15 02:00:23,841 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 68.8ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:23,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2021-04-15 02:00:23,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 623. [2021-04-15 02:00:23,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 623 states, 622 states have (on average 3.3858520900321545) internal successors, (2106), 622 states have internal predecessors, (2106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:23,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 2106 transitions. [2021-04-15 02:00:23,859 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 2106 transitions. Word has length 21 [2021-04-15 02:00:23,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:23,859 INFO L480 AbstractCegarLoop]: Abstraction has 623 states and 2106 transitions. [2021-04-15 02:00:23,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:23,859 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 2106 transitions. [2021-04-15 02:00:23,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:23,860 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:23,860 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:23,861 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-04-15 02:00:23,861 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:23,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:23,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1150903392, now seen corresponding path program 8 times [2021-04-15 02:00:23,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:23,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563883194] [2021-04-15 02:00:23,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:23,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:23,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:23,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563883194] [2021-04-15 02:00:23,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:23,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:23,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740872829] [2021-04-15 02:00:23,965 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:23,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:23,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:23,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:23,966 INFO L87 Difference]: Start difference. First operand 623 states and 2106 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:24,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:24,016 INFO L93 Difference]: Finished difference Result 1281 states and 4104 transitions. [2021-04-15 02:00:24,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:24,017 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:24,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:24,021 INFO L225 Difference]: With dead ends: 1281 [2021-04-15 02:00:24,021 INFO L226 Difference]: Without dead ends: 1129 [2021-04-15 02:00:24,021 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 76.4ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:24,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1129 states. [2021-04-15 02:00:24,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1129 to 588. [2021-04-15 02:00:24,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 587 states have (on average 3.4003407155025553) internal successors, (1996), 587 states have internal predecessors, (1996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:24,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 1996 transitions. [2021-04-15 02:00:24,037 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 1996 transitions. Word has length 21 [2021-04-15 02:00:24,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:24,038 INFO L480 AbstractCegarLoop]: Abstraction has 588 states and 1996 transitions. [2021-04-15 02:00:24,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:24,038 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 1996 transitions. [2021-04-15 02:00:24,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:24,039 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:24,039 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:24,039 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-04-15 02:00:24,039 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:24,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:24,039 INFO L82 PathProgramCache]: Analyzing trace with hash -632541758, now seen corresponding path program 9 times [2021-04-15 02:00:24,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:24,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883538176] [2021-04-15 02:00:24,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:24,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:24,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:24,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883538176] [2021-04-15 02:00:24,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:24,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:24,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769026064] [2021-04-15 02:00:24,131 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:24,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:24,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:24,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:24,131 INFO L87 Difference]: Start difference. First operand 588 states and 1996 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:24,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:24,167 INFO L93 Difference]: Finished difference Result 1287 states and 4136 transitions. [2021-04-15 02:00:24,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:24,168 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:24,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:24,172 INFO L225 Difference]: With dead ends: 1287 [2021-04-15 02:00:24,172 INFO L226 Difference]: Without dead ends: 1153 [2021-04-15 02:00:24,172 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 72.7ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:24,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2021-04-15 02:00:24,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 614. [2021-04-15 02:00:24,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 613 states have (on average 3.3719412724306688) internal successors, (2067), 613 states have internal predecessors, (2067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:24,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 2067 transitions. [2021-04-15 02:00:24,187 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 2067 transitions. Word has length 21 [2021-04-15 02:00:24,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:24,187 INFO L480 AbstractCegarLoop]: Abstraction has 614 states and 2067 transitions. [2021-04-15 02:00:24,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:24,187 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 2067 transitions. [2021-04-15 02:00:24,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:24,188 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:24,188 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:24,188 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-04-15 02:00:24,188 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:24,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:24,189 INFO L82 PathProgramCache]: Analyzing trace with hash 631742624, now seen corresponding path program 10 times [2021-04-15 02:00:24,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:24,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550216060] [2021-04-15 02:00:24,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:24,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:24,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:24,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550216060] [2021-04-15 02:00:24,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:24,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:24,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346625413] [2021-04-15 02:00:24,260 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:24,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:24,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:24,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:24,260 INFO L87 Difference]: Start difference. First operand 614 states and 2067 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:24,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:24,324 INFO L93 Difference]: Finished difference Result 1268 states and 4055 transitions. [2021-04-15 02:00:24,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:24,324 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:24,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:24,329 INFO L225 Difference]: With dead ends: 1268 [2021-04-15 02:00:24,330 INFO L226 Difference]: Without dead ends: 1127 [2021-04-15 02:00:24,330 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 81.0ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:24,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1127 states. [2021-04-15 02:00:24,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1127 to 588. [2021-04-15 02:00:24,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 587 states have (on average 3.3781942078364566) internal successors, (1983), 587 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:24,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 1983 transitions. [2021-04-15 02:00:24,348 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 1983 transitions. Word has length 21 [2021-04-15 02:00:24,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:24,348 INFO L480 AbstractCegarLoop]: Abstraction has 588 states and 1983 transitions. [2021-04-15 02:00:24,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:24,349 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 1983 transitions. [2021-04-15 02:00:24,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:24,350 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:24,350 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:24,350 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-04-15 02:00:24,350 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:24,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:24,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1814079584, now seen corresponding path program 11 times [2021-04-15 02:00:24,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:24,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937638530] [2021-04-15 02:00:24,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:24,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:24,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:24,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937638530] [2021-04-15 02:00:24,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:24,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:24,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393033905] [2021-04-15 02:00:24,417 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:24,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:24,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:24,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:24,418 INFO L87 Difference]: Start difference. First operand 588 states and 1983 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:24,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:24,479 INFO L93 Difference]: Finished difference Result 1245 states and 3995 transitions. [2021-04-15 02:00:24,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:24,479 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:24,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:24,495 INFO L225 Difference]: With dead ends: 1245 [2021-04-15 02:00:24,495 INFO L226 Difference]: Without dead ends: 1128 [2021-04-15 02:00:24,495 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 72.3ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:24,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1128 states. [2021-04-15 02:00:24,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1128 to 606. [2021-04-15 02:00:24,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 605 states have (on average 3.3619834710743803) internal successors, (2034), 605 states have internal predecessors, (2034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:24,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 2034 transitions. [2021-04-15 02:00:24,512 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 2034 transitions. Word has length 21 [2021-04-15 02:00:24,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:24,512 INFO L480 AbstractCegarLoop]: Abstraction has 606 states and 2034 transitions. [2021-04-15 02:00:24,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:24,512 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 2034 transitions. [2021-04-15 02:00:24,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:24,513 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:24,513 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:24,514 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-04-15 02:00:24,514 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:24,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:24,514 INFO L82 PathProgramCache]: Analyzing trace with hash 224144834, now seen corresponding path program 12 times [2021-04-15 02:00:24,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:24,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095174508] [2021-04-15 02:00:24,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:24,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:24,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:24,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095174508] [2021-04-15 02:00:24,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:24,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:24,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602179151] [2021-04-15 02:00:24,577 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:24,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:24,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:24,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:24,577 INFO L87 Difference]: Start difference. First operand 606 states and 2034 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:24,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:24,628 INFO L93 Difference]: Finished difference Result 1243 states and 3972 transitions. [2021-04-15 02:00:24,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:24,628 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:24,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:24,631 INFO L225 Difference]: With dead ends: 1243 [2021-04-15 02:00:24,631 INFO L226 Difference]: Without dead ends: 1089 [2021-04-15 02:00:24,631 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 67.9ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:24,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2021-04-15 02:00:24,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 567. [2021-04-15 02:00:24,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 566 states have (on average 3.408127208480565) internal successors, (1929), 566 states have internal predecessors, (1929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:24,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 1929 transitions. [2021-04-15 02:00:24,645 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 1929 transitions. Word has length 21 [2021-04-15 02:00:24,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:24,645 INFO L480 AbstractCegarLoop]: Abstraction has 567 states and 1929 transitions. [2021-04-15 02:00:24,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:24,645 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 1929 transitions. [2021-04-15 02:00:24,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:24,646 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:24,646 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:24,646 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-04-15 02:00:24,646 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:24,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:24,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1957163848, now seen corresponding path program 13 times [2021-04-15 02:00:24,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:24,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969276396] [2021-04-15 02:00:24,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:24,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:24,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:24,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969276396] [2021-04-15 02:00:24,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:24,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:24,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377712544] [2021-04-15 02:00:24,718 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:24,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:24,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:24,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:24,718 INFO L87 Difference]: Start difference. First operand 567 states and 1929 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:24,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:24,764 INFO L93 Difference]: Finished difference Result 1192 states and 3820 transitions. [2021-04-15 02:00:24,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:24,765 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:24,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:24,767 INFO L225 Difference]: With dead ends: 1192 [2021-04-15 02:00:24,767 INFO L226 Difference]: Without dead ends: 1089 [2021-04-15 02:00:24,767 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 74.9ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:24,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2021-04-15 02:00:24,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 597. [2021-04-15 02:00:24,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 596 states have (on average 3.4060402684563758) internal successors, (2030), 596 states have internal predecessors, (2030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:24,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 2030 transitions. [2021-04-15 02:00:24,782 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 2030 transitions. Word has length 21 [2021-04-15 02:00:24,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:24,782 INFO L480 AbstractCegarLoop]: Abstraction has 597 states and 2030 transitions. [2021-04-15 02:00:24,782 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:24,782 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 2030 transitions. [2021-04-15 02:00:24,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:24,783 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:24,783 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:24,783 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-04-15 02:00:24,784 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:24,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:24,784 INFO L82 PathProgramCache]: Analyzing trace with hash 472376474, now seen corresponding path program 14 times [2021-04-15 02:00:24,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:24,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25886318] [2021-04-15 02:00:24,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:24,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:24,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:24,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25886318] [2021-04-15 02:00:24,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:24,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:24,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983043893] [2021-04-15 02:00:24,889 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:24,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:24,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:24,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:24,890 INFO L87 Difference]: Start difference. First operand 597 states and 2030 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:24,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:24,928 INFO L93 Difference]: Finished difference Result 1223 states and 3907 transitions. [2021-04-15 02:00:24,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:24,928 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:24,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:24,930 INFO L225 Difference]: With dead ends: 1223 [2021-04-15 02:00:24,930 INFO L226 Difference]: Without dead ends: 1069 [2021-04-15 02:00:24,930 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 87.3ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:24,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1069 states. [2021-04-15 02:00:24,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1069 to 577. [2021-04-15 02:00:24,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 576 states have (on average 3.4027777777777777) internal successors, (1960), 576 states have internal predecessors, (1960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:24,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 1960 transitions. [2021-04-15 02:00:24,944 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 1960 transitions. Word has length 21 [2021-04-15 02:00:24,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:24,944 INFO L480 AbstractCegarLoop]: Abstraction has 577 states and 1960 transitions. [2021-04-15 02:00:24,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:24,945 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 1960 transitions. [2021-04-15 02:00:24,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:24,946 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:24,946 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:24,946 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-04-15 02:00:24,946 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:24,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:24,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1419053670, now seen corresponding path program 15 times [2021-04-15 02:00:24,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:24,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977045714] [2021-04-15 02:00:24,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:24,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:25,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:25,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977045714] [2021-04-15 02:00:25,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:25,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:25,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969921902] [2021-04-15 02:00:25,008 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:25,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:25,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:25,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:25,009 INFO L87 Difference]: Start difference. First operand 577 states and 1960 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:25,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:25,059 INFO L93 Difference]: Finished difference Result 1165 states and 3727 transitions. [2021-04-15 02:00:25,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:25,060 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:25,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:25,063 INFO L225 Difference]: With dead ends: 1165 [2021-04-15 02:00:25,063 INFO L226 Difference]: Without dead ends: 1062 [2021-04-15 02:00:25,064 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 67.0ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:25,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1062 states. [2021-04-15 02:00:25,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1062 to 589. [2021-04-15 02:00:25,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 588 states have (on average 3.3877551020408165) internal successors, (1992), 588 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:25,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 1992 transitions. [2021-04-15 02:00:25,083 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 1992 transitions. Word has length 21 [2021-04-15 02:00:25,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:25,083 INFO L480 AbstractCegarLoop]: Abstraction has 589 states and 1992 transitions. [2021-04-15 02:00:25,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:25,083 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 1992 transitions. [2021-04-15 02:00:25,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:25,085 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:25,085 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:25,085 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-04-15 02:00:25,085 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:25,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:25,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1264168858, now seen corresponding path program 16 times [2021-04-15 02:00:25,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:25,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689341415] [2021-04-15 02:00:25,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:25,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:25,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:25,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689341415] [2021-04-15 02:00:25,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:25,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:25,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338982894] [2021-04-15 02:00:25,160 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:25,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:25,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:25,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:25,161 INFO L87 Difference]: Start difference. First operand 589 states and 1992 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:25,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:25,207 INFO L93 Difference]: Finished difference Result 1177 states and 3759 transitions. [2021-04-15 02:00:25,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:25,208 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:25,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:25,210 INFO L225 Difference]: With dead ends: 1177 [2021-04-15 02:00:25,210 INFO L226 Difference]: Without dead ends: 1050 [2021-04-15 02:00:25,210 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 65.4ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:25,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2021-04-15 02:00:25,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 577. [2021-04-15 02:00:25,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 576 states have (on average 3.392361111111111) internal successors, (1954), 576 states have internal predecessors, (1954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:25,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 1954 transitions. [2021-04-15 02:00:25,224 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 1954 transitions. Word has length 21 [2021-04-15 02:00:25,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:25,224 INFO L480 AbstractCegarLoop]: Abstraction has 577 states and 1954 transitions. [2021-04-15 02:00:25,224 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:25,224 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 1954 transitions. [2021-04-15 02:00:25,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:25,225 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:25,225 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:25,225 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-04-15 02:00:25,226 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:25,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:25,226 INFO L82 PathProgramCache]: Analyzing trace with hash 947468028, now seen corresponding path program 17 times [2021-04-15 02:00:25,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:25,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619308458] [2021-04-15 02:00:25,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:25,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:25,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:25,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619308458] [2021-04-15 02:00:25,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:25,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:25,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161200114] [2021-04-15 02:00:25,300 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:25,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:25,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:25,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:25,301 INFO L87 Difference]: Start difference. First operand 577 states and 1954 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:25,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:25,345 INFO L93 Difference]: Finished difference Result 1241 states and 3972 transitions. [2021-04-15 02:00:25,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:25,345 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:25,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:25,348 INFO L225 Difference]: With dead ends: 1241 [2021-04-15 02:00:25,348 INFO L226 Difference]: Without dead ends: 1107 [2021-04-15 02:00:25,348 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 57.2ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:25,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1107 states. [2021-04-15 02:00:25,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1107 to 603. [2021-04-15 02:00:25,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 602 states have (on average 3.3637873754152823) internal successors, (2025), 602 states have internal predecessors, (2025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:25,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 2025 transitions. [2021-04-15 02:00:25,362 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 2025 transitions. Word has length 21 [2021-04-15 02:00:25,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:25,362 INFO L480 AbstractCegarLoop]: Abstraction has 603 states and 2025 transitions. [2021-04-15 02:00:25,362 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:25,362 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 2025 transitions. [2021-04-15 02:00:25,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:25,363 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:25,363 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:25,363 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-04-15 02:00:25,364 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:25,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:25,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1035404762, now seen corresponding path program 18 times [2021-04-15 02:00:25,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:25,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661437384] [2021-04-15 02:00:25,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:25,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:25,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:25,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661437384] [2021-04-15 02:00:25,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:25,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:25,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820128706] [2021-04-15 02:00:25,432 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:25,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:25,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:25,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:25,433 INFO L87 Difference]: Start difference. First operand 603 states and 2025 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:25,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:25,480 INFO L93 Difference]: Finished difference Result 1222 states and 3891 transitions. [2021-04-15 02:00:25,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:25,480 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:25,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:25,483 INFO L225 Difference]: With dead ends: 1222 [2021-04-15 02:00:25,483 INFO L226 Difference]: Without dead ends: 1071 [2021-04-15 02:00:25,483 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 68.0ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:25,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1071 states. [2021-04-15 02:00:25,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1071 to 567. [2021-04-15 02:00:25,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 566 states have (on average 3.3992932862190814) internal successors, (1924), 566 states have internal predecessors, (1924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:25,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 1924 transitions. [2021-04-15 02:00:25,497 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 1924 transitions. Word has length 21 [2021-04-15 02:00:25,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:25,497 INFO L480 AbstractCegarLoop]: Abstraction has 567 states and 1924 transitions. [2021-04-15 02:00:25,497 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:25,497 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 1924 transitions. [2021-04-15 02:00:25,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:25,499 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:25,499 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:25,499 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-04-15 02:00:25,499 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:25,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:25,499 INFO L82 PathProgramCache]: Analyzing trace with hash 873653722, now seen corresponding path program 19 times [2021-04-15 02:00:25,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:25,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385026178] [2021-04-15 02:00:25,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:25,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:25,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:25,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385026178] [2021-04-15 02:00:25,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:25,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:25,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401575598] [2021-04-15 02:00:25,575 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:25,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:25,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:25,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:25,575 INFO L87 Difference]: Start difference. First operand 567 states and 1924 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:25,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:25,629 INFO L93 Difference]: Finished difference Result 1130 states and 3615 transitions. [2021-04-15 02:00:25,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:25,629 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:25,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:25,632 INFO L225 Difference]: With dead ends: 1130 [2021-04-15 02:00:25,632 INFO L226 Difference]: Without dead ends: 1027 [2021-04-15 02:00:25,632 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 68.4ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:25,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1027 states. [2021-04-15 02:00:25,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1027 to 585. [2021-04-15 02:00:25,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 584 states have (on average 3.392123287671233) internal successors, (1981), 584 states have internal predecessors, (1981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:25,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 1981 transitions. [2021-04-15 02:00:25,646 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 1981 transitions. Word has length 21 [2021-04-15 02:00:25,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:25,646 INFO L480 AbstractCegarLoop]: Abstraction has 585 states and 1981 transitions. [2021-04-15 02:00:25,646 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:25,646 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 1981 transitions. [2021-04-15 02:00:25,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:25,647 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:25,647 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:25,647 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-04-15 02:00:25,647 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:25,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:25,647 INFO L82 PathProgramCache]: Analyzing trace with hash -59461670, now seen corresponding path program 20 times [2021-04-15 02:00:25,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:25,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388368930] [2021-04-15 02:00:25,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:25,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:25,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:25,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388368930] [2021-04-15 02:00:25,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:25,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:25,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913758125] [2021-04-15 02:00:25,706 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:25,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:25,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:25,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:25,706 INFO L87 Difference]: Start difference. First operand 585 states and 1981 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:25,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:25,755 INFO L93 Difference]: Finished difference Result 1144 states and 3652 transitions. [2021-04-15 02:00:25,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:25,755 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:25,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:25,757 INFO L225 Difference]: With dead ends: 1144 [2021-04-15 02:00:25,757 INFO L226 Difference]: Without dead ends: 1015 [2021-04-15 02:00:25,757 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 71.0ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:25,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1015 states. [2021-04-15 02:00:25,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1015 to 573. [2021-04-15 02:00:25,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 572 states have (on average 3.3968531468531467) internal successors, (1943), 572 states have internal predecessors, (1943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:25,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 1943 transitions. [2021-04-15 02:00:25,769 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 1943 transitions. Word has length 21 [2021-04-15 02:00:25,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:25,769 INFO L480 AbstractCegarLoop]: Abstraction has 573 states and 1943 transitions. [2021-04-15 02:00:25,769 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:25,770 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 1943 transitions. [2021-04-15 02:00:25,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:25,771 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:25,771 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:25,771 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-04-15 02:00:25,771 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:25,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:25,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1169683272, now seen corresponding path program 21 times [2021-04-15 02:00:25,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:25,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764203567] [2021-04-15 02:00:25,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:25,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:25,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:25,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764203567] [2021-04-15 02:00:25,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:25,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:25,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824597326] [2021-04-15 02:00:25,828 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:25,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:25,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:25,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:25,829 INFO L87 Difference]: Start difference. First operand 573 states and 1943 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:25,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:25,877 INFO L93 Difference]: Finished difference Result 1128 states and 3604 transitions. [2021-04-15 02:00:25,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:25,877 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:25,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:25,879 INFO L225 Difference]: With dead ends: 1128 [2021-04-15 02:00:25,879 INFO L226 Difference]: Without dead ends: 1025 [2021-04-15 02:00:25,880 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 67.5ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:25,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1025 states. [2021-04-15 02:00:25,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1025 to 585. [2021-04-15 02:00:25,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 584 states have (on average 3.381849315068493) internal successors, (1975), 584 states have internal predecessors, (1975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:25,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 1975 transitions. [2021-04-15 02:00:25,893 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 1975 transitions. Word has length 21 [2021-04-15 02:00:25,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:25,893 INFO L480 AbstractCegarLoop]: Abstraction has 585 states and 1975 transitions. [2021-04-15 02:00:25,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:25,893 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 1975 transitions. [2021-04-15 02:00:25,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:25,894 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:25,894 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:25,894 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-04-15 02:00:25,894 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:25,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:25,895 INFO L82 PathProgramCache]: Analyzing trace with hash -65892390, now seen corresponding path program 22 times [2021-04-15 02:00:25,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:25,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691160189] [2021-04-15 02:00:25,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:25,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:25,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:25,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691160189] [2021-04-15 02:00:25,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:25,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:25,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370323718] [2021-04-15 02:00:25,954 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:25,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:25,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:25,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:25,955 INFO L87 Difference]: Start difference. First operand 585 states and 1975 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:26,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:26,001 INFO L93 Difference]: Finished difference Result 1140 states and 3636 transitions. [2021-04-15 02:00:26,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:26,002 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:26,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:26,004 INFO L225 Difference]: With dead ends: 1140 [2021-04-15 02:00:26,004 INFO L226 Difference]: Without dead ends: 1013 [2021-04-15 02:00:26,004 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 68.1ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:26,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2021-04-15 02:00:26,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 573. [2021-04-15 02:00:26,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 572 states have (on average 3.3863636363636362) internal successors, (1937), 572 states have internal predecessors, (1937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:26,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 1937 transitions. [2021-04-15 02:00:26,017 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 1937 transitions. Word has length 21 [2021-04-15 02:00:26,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:26,018 INFO L480 AbstractCegarLoop]: Abstraction has 573 states and 1937 transitions. [2021-04-15 02:00:26,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:26,018 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 1937 transitions. [2021-04-15 02:00:26,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:26,019 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:26,019 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:26,019 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-04-15 02:00:26,019 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:26,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:26,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1537010138, now seen corresponding path program 23 times [2021-04-15 02:00:26,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:26,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178047223] [2021-04-15 02:00:26,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:26,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:26,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:26,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178047223] [2021-04-15 02:00:26,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:26,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:26,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142803837] [2021-04-15 02:00:26,080 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:26,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:26,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:26,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:26,080 INFO L87 Difference]: Start difference. First operand 573 states and 1937 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:26,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:26,129 INFO L93 Difference]: Finished difference Result 1162 states and 3721 transitions. [2021-04-15 02:00:26,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:26,129 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:26,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:26,131 INFO L225 Difference]: With dead ends: 1162 [2021-04-15 02:00:26,131 INFO L226 Difference]: Without dead ends: 1045 [2021-04-15 02:00:26,131 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 70.6ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:26,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1045 states. [2021-04-15 02:00:26,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1045 to 591. [2021-04-15 02:00:26,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 590 states have (on average 3.369491525423729) internal successors, (1988), 590 states have internal predecessors, (1988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:26,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 1988 transitions. [2021-04-15 02:00:26,145 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 1988 transitions. Word has length 21 [2021-04-15 02:00:26,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:26,145 INFO L480 AbstractCegarLoop]: Abstraction has 591 states and 1988 transitions. [2021-04-15 02:00:26,145 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:26,145 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 1988 transitions. [2021-04-15 02:00:26,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:26,146 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:26,147 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:26,147 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-04-15 02:00:26,147 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:26,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:26,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1208627256, now seen corresponding path program 24 times [2021-04-15 02:00:26,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:26,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501712041] [2021-04-15 02:00:26,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:26,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:26,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:26,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501712041] [2021-04-15 02:00:26,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:26,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:26,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778233692] [2021-04-15 02:00:26,214 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:26,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:26,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:26,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:26,215 INFO L87 Difference]: Start difference. First operand 591 states and 1988 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:26,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:26,269 INFO L93 Difference]: Finished difference Result 1160 states and 3698 transitions. [2021-04-15 02:00:26,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:26,270 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:26,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:26,272 INFO L225 Difference]: With dead ends: 1160 [2021-04-15 02:00:26,272 INFO L226 Difference]: Without dead ends: 1010 [2021-04-15 02:00:26,272 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 71.7ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:26,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1010 states. [2021-04-15 02:00:26,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1010 to 556. [2021-04-15 02:00:26,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 555 states have (on average 3.427027027027027) internal successors, (1902), 555 states have internal predecessors, (1902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:26,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 1902 transitions. [2021-04-15 02:00:26,286 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 1902 transitions. Word has length 21 [2021-04-15 02:00:26,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:26,286 INFO L480 AbstractCegarLoop]: Abstraction has 556 states and 1902 transitions. [2021-04-15 02:00:26,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:26,286 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 1902 transitions. [2021-04-15 02:00:26,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:26,287 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:26,287 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:26,288 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-04-15 02:00:26,288 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:26,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:26,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1496436350, now seen corresponding path program 25 times [2021-04-15 02:00:26,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:26,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475326079] [2021-04-15 02:00:26,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:26,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:26,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:26,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475326079] [2021-04-15 02:00:26,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:26,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:26,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950040453] [2021-04-15 02:00:26,353 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:26,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:26,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:26,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:26,354 INFO L87 Difference]: Start difference. First operand 556 states and 1902 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:26,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:26,392 INFO L93 Difference]: Finished difference Result 1242 states and 3976 transitions. [2021-04-15 02:00:26,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:26,392 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:26,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:26,394 INFO L225 Difference]: With dead ends: 1242 [2021-04-15 02:00:26,394 INFO L226 Difference]: Without dead ends: 1108 [2021-04-15 02:00:26,395 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 62.0ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:26,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1108 states. [2021-04-15 02:00:26,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1108 to 591. [2021-04-15 02:00:26,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 590 states have (on average 3.3813559322033897) internal successors, (1995), 590 states have internal predecessors, (1995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:26,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 1995 transitions. [2021-04-15 02:00:26,410 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 1995 transitions. Word has length 21 [2021-04-15 02:00:26,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:26,410 INFO L480 AbstractCegarLoop]: Abstraction has 591 states and 1995 transitions. [2021-04-15 02:00:26,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:26,410 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 1995 transitions. [2021-04-15 02:00:26,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:26,411 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:26,411 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:26,411 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-04-15 02:00:26,411 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:26,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:26,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1048262978, now seen corresponding path program 26 times [2021-04-15 02:00:26,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:26,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124290165] [2021-04-15 02:00:26,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:26,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:26,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:26,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124290165] [2021-04-15 02:00:26,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:26,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:26,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24619974] [2021-04-15 02:00:26,470 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:26,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:26,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:26,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:26,470 INFO L87 Difference]: Start difference. First operand 591 states and 1995 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:26,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:26,520 INFO L93 Difference]: Finished difference Result 1225 states and 3899 transitions. [2021-04-15 02:00:26,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:26,521 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:26,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:26,523 INFO L225 Difference]: With dead ends: 1225 [2021-04-15 02:00:26,523 INFO L226 Difference]: Without dead ends: 1073 [2021-04-15 02:00:26,523 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 69.4ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:26,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1073 states. [2021-04-15 02:00:26,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1073 to 556. [2021-04-15 02:00:26,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 555 states have (on average 3.4018018018018017) internal successors, (1888), 555 states have internal predecessors, (1888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:26,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 1888 transitions. [2021-04-15 02:00:26,537 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 1888 transitions. Word has length 21 [2021-04-15 02:00:26,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:26,537 INFO L480 AbstractCegarLoop]: Abstraction has 556 states and 1888 transitions. [2021-04-15 02:00:26,537 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:26,537 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 1888 transitions. [2021-04-15 02:00:26,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:26,538 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:26,538 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:26,539 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-04-15 02:00:26,539 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:26,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:26,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1892039334, now seen corresponding path program 27 times [2021-04-15 02:00:26,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:26,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115180175] [2021-04-15 02:00:26,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:26,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:26,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:26,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115180175] [2021-04-15 02:00:26,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:26,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:26,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866096790] [2021-04-15 02:00:26,606 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:26,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:26,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:26,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:26,607 INFO L87 Difference]: Start difference. First operand 556 states and 1888 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:26,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:26,652 INFO L93 Difference]: Finished difference Result 1182 states and 3766 transitions. [2021-04-15 02:00:26,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:26,653 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:26,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:26,655 INFO L225 Difference]: With dead ends: 1182 [2021-04-15 02:00:26,655 INFO L226 Difference]: Without dead ends: 1079 [2021-04-15 02:00:26,655 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 76.7ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:26,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1079 states. [2021-04-15 02:00:26,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1079 to 576. [2021-04-15 02:00:26,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 575 states have (on average 3.3878260869565215) internal successors, (1948), 575 states have internal predecessors, (1948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:26,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 1948 transitions. [2021-04-15 02:00:26,668 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 1948 transitions. Word has length 21 [2021-04-15 02:00:26,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:26,668 INFO L480 AbstractCegarLoop]: Abstraction has 576 states and 1948 transitions. [2021-04-15 02:00:26,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:26,668 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 1948 transitions. [2021-04-15 02:00:26,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:26,669 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:26,670 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:26,670 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-04-15 02:00:26,670 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:26,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:26,670 INFO L82 PathProgramCache]: Analyzing trace with hash 537500988, now seen corresponding path program 28 times [2021-04-15 02:00:26,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:26,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248133182] [2021-04-15 02:00:26,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:26,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:26,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:26,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248133182] [2021-04-15 02:00:26,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:26,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:26,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279848377] [2021-04-15 02:00:26,733 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:26,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:26,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:26,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:26,734 INFO L87 Difference]: Start difference. First operand 576 states and 1948 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:26,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:26,766 INFO L93 Difference]: Finished difference Result 1213 states and 3853 transitions. [2021-04-15 02:00:26,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:26,767 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:26,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:26,768 INFO L225 Difference]: With dead ends: 1213 [2021-04-15 02:00:26,769 INFO L226 Difference]: Without dead ends: 1059 [2021-04-15 02:00:26,769 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 63.7ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:26,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1059 states. [2021-04-15 02:00:26,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1059 to 556. [2021-04-15 02:00:26,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 555 states have (on average 3.383783783783784) internal successors, (1878), 555 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:26,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 1878 transitions. [2021-04-15 02:00:26,780 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 1878 transitions. Word has length 21 [2021-04-15 02:00:26,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:26,780 INFO L480 AbstractCegarLoop]: Abstraction has 556 states and 1878 transitions. [2021-04-15 02:00:26,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:26,781 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 1878 transitions. [2021-04-15 02:00:26,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:26,781 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:26,781 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:26,782 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-04-15 02:00:26,782 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:26,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:26,782 INFO L82 PathProgramCache]: Analyzing trace with hash -315771494, now seen corresponding path program 29 times [2021-04-15 02:00:26,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:26,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109209653] [2021-04-15 02:00:26,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:26,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:26,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:26,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109209653] [2021-04-15 02:00:26,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:26,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:26,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732516793] [2021-04-15 02:00:26,836 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:26,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:26,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:26,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:26,836 INFO L87 Difference]: Start difference. First operand 556 states and 1878 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:26,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:26,879 INFO L93 Difference]: Finished difference Result 1157 states and 3678 transitions. [2021-04-15 02:00:26,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:26,879 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:26,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:26,881 INFO L225 Difference]: With dead ends: 1157 [2021-04-15 02:00:26,882 INFO L226 Difference]: Without dead ends: 1054 [2021-04-15 02:00:26,882 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 64.8ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:26,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2021-04-15 02:00:26,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 568. [2021-04-15 02:00:26,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 567 states have (on average 3.368606701940035) internal successors, (1910), 567 states have internal predecessors, (1910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:26,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 1910 transitions. [2021-04-15 02:00:26,895 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 1910 transitions. Word has length 21 [2021-04-15 02:00:26,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:26,895 INFO L480 AbstractCegarLoop]: Abstraction has 568 states and 1910 transitions. [2021-04-15 02:00:26,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:26,895 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 1910 transitions. [2021-04-15 02:00:26,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:26,896 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:26,896 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:26,896 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-04-15 02:00:26,896 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:26,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:26,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1248886886, now seen corresponding path program 30 times [2021-04-15 02:00:26,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:26,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340360126] [2021-04-15 02:00:26,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:26,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:26,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:26,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340360126] [2021-04-15 02:00:26,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:26,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:26,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116640810] [2021-04-15 02:00:26,965 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:26,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:26,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:26,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:26,965 INFO L87 Difference]: Start difference. First operand 568 states and 1910 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:27,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:27,013 INFO L93 Difference]: Finished difference Result 1171 states and 3715 transitions. [2021-04-15 02:00:27,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:27,014 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:27,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:27,016 INFO L225 Difference]: With dead ends: 1171 [2021-04-15 02:00:27,016 INFO L226 Difference]: Without dead ends: 1028 [2021-04-15 02:00:27,018 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 80.9ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:27,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1028 states. [2021-04-15 02:00:27,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1028 to 542. [2021-04-15 02:00:27,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 3.406654343807763) internal successors, (1843), 541 states have internal predecessors, (1843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:27,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1843 transitions. [2021-04-15 02:00:27,030 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1843 transitions. Word has length 21 [2021-04-15 02:00:27,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:27,030 INFO L480 AbstractCegarLoop]: Abstraction has 542 states and 1843 transitions. [2021-04-15 02:00:27,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:27,030 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1843 transitions. [2021-04-15 02:00:27,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:27,031 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:27,031 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:27,031 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-04-15 02:00:27,031 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:27,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:27,031 INFO L82 PathProgramCache]: Analyzing trace with hash 825224928, now seen corresponding path program 31 times [2021-04-15 02:00:27,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:27,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266440610] [2021-04-15 02:00:27,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:27,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:27,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:27,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266440610] [2021-04-15 02:00:27,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:27,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:27,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653487953] [2021-04-15 02:00:27,099 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:27,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:27,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:27,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:27,099 INFO L87 Difference]: Start difference. First operand 542 states and 1843 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:27,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:27,133 INFO L93 Difference]: Finished difference Result 1207 states and 3850 transitions. [2021-04-15 02:00:27,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:27,134 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:27,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:27,136 INFO L225 Difference]: With dead ends: 1207 [2021-04-15 02:00:27,136 INFO L226 Difference]: Without dead ends: 1073 [2021-04-15 02:00:27,136 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 60.5ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:27,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1073 states. [2021-04-15 02:00:27,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1073 to 591. [2021-04-15 02:00:27,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 590 states have (on average 3.371186440677966) internal successors, (1989), 590 states have internal predecessors, (1989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:27,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 1989 transitions. [2021-04-15 02:00:27,149 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 1989 transitions. Word has length 21 [2021-04-15 02:00:27,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:27,149 INFO L480 AbstractCegarLoop]: Abstraction has 591 states and 1989 transitions. [2021-04-15 02:00:27,149 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:27,149 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 1989 transitions. [2021-04-15 02:00:27,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:27,150 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:27,150 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:27,150 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-04-15 02:00:27,151 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:27,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:27,151 INFO L82 PathProgramCache]: Analyzing trace with hash -925043040, now seen corresponding path program 32 times [2021-04-15 02:00:27,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:27,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517645304] [2021-04-15 02:00:27,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:27,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:27,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:27,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517645304] [2021-04-15 02:00:27,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:27,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:27,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89597434] [2021-04-15 02:00:27,220 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:27,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:27,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:27,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:27,221 INFO L87 Difference]: Start difference. First operand 591 states and 1989 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:27,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:27,275 INFO L93 Difference]: Finished difference Result 1190 states and 3773 transitions. [2021-04-15 02:00:27,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:27,276 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:27,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:27,278 INFO L225 Difference]: With dead ends: 1190 [2021-04-15 02:00:27,278 INFO L226 Difference]: Without dead ends: 1038 [2021-04-15 02:00:27,278 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 76.6ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:27,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2021-04-15 02:00:27,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 556. [2021-04-15 02:00:27,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 555 states have (on average 3.390990990990991) internal successors, (1882), 555 states have internal predecessors, (1882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:27,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 1882 transitions. [2021-04-15 02:00:27,290 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 1882 transitions. Word has length 21 [2021-04-15 02:00:27,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:27,290 INFO L480 AbstractCegarLoop]: Abstraction has 556 states and 1882 transitions. [2021-04-15 02:00:27,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:27,290 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 1882 transitions. [2021-04-15 02:00:27,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:27,291 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:27,291 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:27,291 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-04-15 02:00:27,291 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:27,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:27,292 INFO L82 PathProgramCache]: Analyzing trace with hash -336502594, now seen corresponding path program 33 times [2021-04-15 02:00:27,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:27,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427376017] [2021-04-15 02:00:27,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:27,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:27,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:27,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427376017] [2021-04-15 02:00:27,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:27,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:27,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270213845] [2021-04-15 02:00:27,368 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:27,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:27,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:27,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:27,369 INFO L87 Difference]: Start difference. First operand 556 states and 1882 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:27,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:27,402 INFO L93 Difference]: Finished difference Result 1147 states and 3640 transitions. [2021-04-15 02:00:27,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:27,402 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:27,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:27,404 INFO L225 Difference]: With dead ends: 1147 [2021-04-15 02:00:27,404 INFO L226 Difference]: Without dead ends: 1044 [2021-04-15 02:00:27,404 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 65.1ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:27,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2021-04-15 02:00:27,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 576. [2021-04-15 02:00:27,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 575 states have (on average 3.3773913043478263) internal successors, (1942), 575 states have internal predecessors, (1942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:27,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 1942 transitions. [2021-04-15 02:00:27,417 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 1942 transitions. Word has length 21 [2021-04-15 02:00:27,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:27,417 INFO L480 AbstractCegarLoop]: Abstraction has 576 states and 1942 transitions. [2021-04-15 02:00:27,417 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:27,417 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 1942 transitions. [2021-04-15 02:00:27,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:27,418 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:27,418 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:27,418 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-04-15 02:00:27,418 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:27,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:27,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1926437344, now seen corresponding path program 34 times [2021-04-15 02:00:27,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:27,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071097836] [2021-04-15 02:00:27,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:27,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:27,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:27,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071097836] [2021-04-15 02:00:27,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:27,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:27,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450143548] [2021-04-15 02:00:27,504 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:27,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:27,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:27,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:27,504 INFO L87 Difference]: Start difference. First operand 576 states and 1942 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:27,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:27,538 INFO L93 Difference]: Finished difference Result 1123 states and 3552 transitions. [2021-04-15 02:00:27,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:27,538 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:27,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:27,540 INFO L225 Difference]: With dead ends: 1123 [2021-04-15 02:00:27,540 INFO L226 Difference]: Without dead ends: 969 [2021-04-15 02:00:27,541 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 78.3ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:27,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 969 states. [2021-04-15 02:00:27,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 969 to 556. [2021-04-15 02:00:27,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 555 states have (on average 3.372972972972973) internal successors, (1872), 555 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:27,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 1872 transitions. [2021-04-15 02:00:27,557 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 1872 transitions. Word has length 21 [2021-04-15 02:00:27,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:27,557 INFO L480 AbstractCegarLoop]: Abstraction has 556 states and 1872 transitions. [2021-04-15 02:00:27,557 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:27,557 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 1872 transitions. [2021-04-15 02:00:27,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:27,558 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:27,558 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:27,558 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-04-15 02:00:27,558 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:27,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:27,559 INFO L82 PathProgramCache]: Analyzing trace with hash 744560032, now seen corresponding path program 35 times [2021-04-15 02:00:27,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:27,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272246067] [2021-04-15 02:00:27,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:27,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:27,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:27,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272246067] [2021-04-15 02:00:27,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:27,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:27,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285120316] [2021-04-15 02:00:27,628 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:27,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:27,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:27,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:27,628 INFO L87 Difference]: Start difference. First operand 556 states and 1872 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:27,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:27,662 INFO L93 Difference]: Finished difference Result 1122 states and 3552 transitions. [2021-04-15 02:00:27,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:27,663 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:27,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:27,665 INFO L225 Difference]: With dead ends: 1122 [2021-04-15 02:00:27,665 INFO L226 Difference]: Without dead ends: 1019 [2021-04-15 02:00:27,665 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 68.5ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:27,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1019 states. [2021-04-15 02:00:27,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1019 to 568. [2021-04-15 02:00:27,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 567 states have (on average 3.3580246913580245) internal successors, (1904), 567 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:27,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 1904 transitions. [2021-04-15 02:00:27,678 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 1904 transitions. Word has length 21 [2021-04-15 02:00:27,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:27,678 INFO L480 AbstractCegarLoop]: Abstraction has 568 states and 1904 transitions. [2021-04-15 02:00:27,679 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:27,679 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 1904 transitions. [2021-04-15 02:00:27,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:27,679 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:27,679 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:27,680 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-04-15 02:00:27,680 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:27,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:27,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1752858016, now seen corresponding path program 36 times [2021-04-15 02:00:27,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:27,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138821601] [2021-04-15 02:00:27,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:27,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:27,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:27,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138821601] [2021-04-15 02:00:27,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:27,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:27,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230897359] [2021-04-15 02:00:27,761 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:27,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:27,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:27,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:27,762 INFO L87 Difference]: Start difference. First operand 568 states and 1904 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:27,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:27,809 INFO L93 Difference]: Finished difference Result 1098 states and 3464 transitions. [2021-04-15 02:00:27,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:27,810 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:27,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:27,812 INFO L225 Difference]: With dead ends: 1098 [2021-04-15 02:00:27,812 INFO L226 Difference]: Without dead ends: 955 [2021-04-15 02:00:27,812 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 90.2ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:27,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2021-04-15 02:00:27,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 542. [2021-04-15 02:00:27,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 3.3955637707948245) internal successors, (1837), 541 states have internal predecessors, (1837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:27,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1837 transitions. [2021-04-15 02:00:27,823 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1837 transitions. Word has length 21 [2021-04-15 02:00:27,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:27,823 INFO L480 AbstractCegarLoop]: Abstraction has 542 states and 1837 transitions. [2021-04-15 02:00:27,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:27,823 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1837 transitions. [2021-04-15 02:00:27,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:27,824 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:27,824 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:27,824 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-04-15 02:00:27,824 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:27,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:27,824 INFO L82 PathProgramCache]: Analyzing trace with hash 749113148, now seen corresponding path program 37 times [2021-04-15 02:00:27,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:27,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706267884] [2021-04-15 02:00:27,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:27,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:27,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:27,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706267884] [2021-04-15 02:00:27,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:27,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:27,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100645651] [2021-04-15 02:00:27,884 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:27,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:27,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:27,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:27,885 INFO L87 Difference]: Start difference. First operand 542 states and 1837 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:27,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:27,934 INFO L93 Difference]: Finished difference Result 1100 states and 3491 transitions. [2021-04-15 02:00:27,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:27,934 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:27,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:27,936 INFO L225 Difference]: With dead ends: 1100 [2021-04-15 02:00:27,936 INFO L226 Difference]: Without dead ends: 997 [2021-04-15 02:00:27,936 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 73.0ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:27,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2021-04-15 02:00:27,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 558. [2021-04-15 02:00:27,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 557 states have (on average 3.391382405745063) internal successors, (1889), 557 states have internal predecessors, (1889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:27,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 1889 transitions. [2021-04-15 02:00:27,947 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 1889 transitions. Word has length 21 [2021-04-15 02:00:27,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:27,947 INFO L480 AbstractCegarLoop]: Abstraction has 558 states and 1889 transitions. [2021-04-15 02:00:27,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:27,947 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 1889 transitions. [2021-04-15 02:00:27,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:27,948 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:27,948 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:27,948 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-04-15 02:00:27,949 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:27,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:27,949 INFO L82 PathProgramCache]: Analyzing trace with hash 997222278, now seen corresponding path program 38 times [2021-04-15 02:00:27,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:27,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416183553] [2021-04-15 02:00:27,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:27,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:28,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:28,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416183553] [2021-04-15 02:00:28,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:28,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:28,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004878481] [2021-04-15 02:00:28,010 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:28,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:28,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:28,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:28,010 INFO L87 Difference]: Start difference. First operand 558 states and 1889 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:28,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:28,044 INFO L93 Difference]: Finished difference Result 1100 states and 3483 transitions. [2021-04-15 02:00:28,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:28,045 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:28,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:28,046 INFO L225 Difference]: With dead ends: 1100 [2021-04-15 02:00:28,046 INFO L226 Difference]: Without dead ends: 989 [2021-04-15 02:00:28,047 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 61.6ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:28,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 989 states. [2021-04-15 02:00:28,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 989 to 550. [2021-04-15 02:00:28,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 549 states have (on average 3.397085610200364) internal successors, (1865), 549 states have internal predecessors, (1865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:28,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 1865 transitions. [2021-04-15 02:00:28,057 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 1865 transitions. Word has length 21 [2021-04-15 02:00:28,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:28,057 INFO L480 AbstractCegarLoop]: Abstraction has 550 states and 1865 transitions. [2021-04-15 02:00:28,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:28,057 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 1865 transitions. [2021-04-15 02:00:28,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:28,058 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:28,058 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:28,058 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-04-15 02:00:28,058 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:28,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:28,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1294223846, now seen corresponding path program 39 times [2021-04-15 02:00:28,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:28,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039119879] [2021-04-15 02:00:28,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:28,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:28,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:28,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039119879] [2021-04-15 02:00:28,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:28,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:28,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179697614] [2021-04-15 02:00:28,141 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:28,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:28,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:28,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:28,141 INFO L87 Difference]: Start difference. First operand 550 states and 1865 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:28,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:28,183 INFO L93 Difference]: Finished difference Result 1123 states and 3558 transitions. [2021-04-15 02:00:28,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:28,183 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:28,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:28,185 INFO L225 Difference]: With dead ends: 1123 [2021-04-15 02:00:28,185 INFO L226 Difference]: Without dead ends: 1020 [2021-04-15 02:00:28,185 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 78.2ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:28,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1020 states. [2021-04-15 02:00:28,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1020 to 570. [2021-04-15 02:00:28,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 569 states have (on average 3.383128295254833) internal successors, (1925), 569 states have internal predecessors, (1925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:28,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 1925 transitions. [2021-04-15 02:00:28,196 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 1925 transitions. Word has length 21 [2021-04-15 02:00:28,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:28,196 INFO L480 AbstractCegarLoop]: Abstraction has 570 states and 1925 transitions. [2021-04-15 02:00:28,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:28,196 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 1925 transitions. [2021-04-15 02:00:28,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:28,197 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:28,197 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:28,197 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-04-15 02:00:28,197 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:28,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:28,198 INFO L82 PathProgramCache]: Analyzing trace with hash 2141739260, now seen corresponding path program 40 times [2021-04-15 02:00:28,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:28,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996413946] [2021-04-15 02:00:28,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:28,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:28,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:28,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996413946] [2021-04-15 02:00:28,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:28,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:28,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813714759] [2021-04-15 02:00:28,261 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:28,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:28,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:28,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:28,262 INFO L87 Difference]: Start difference. First operand 570 states and 1925 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:28,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:28,293 INFO L93 Difference]: Finished difference Result 1154 states and 3645 transitions. [2021-04-15 02:00:28,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:28,293 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:28,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:28,295 INFO L225 Difference]: With dead ends: 1154 [2021-04-15 02:00:28,296 INFO L226 Difference]: Without dead ends: 1000 [2021-04-15 02:00:28,296 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 63.5ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:28,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1000 states. [2021-04-15 02:00:28,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1000 to 550. [2021-04-15 02:00:28,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 549 states have (on average 3.3825136612021858) internal successors, (1857), 549 states have internal predecessors, (1857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:28,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 1857 transitions. [2021-04-15 02:00:28,307 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 1857 transitions. Word has length 21 [2021-04-15 02:00:28,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:28,308 INFO L480 AbstractCegarLoop]: Abstraction has 550 states and 1857 transitions. [2021-04-15 02:00:28,308 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:28,308 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 1857 transitions. [2021-04-15 02:00:28,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:28,309 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:28,309 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:28,309 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-04-15 02:00:28,309 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:28,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:28,309 INFO L82 PathProgramCache]: Analyzing trace with hash 644082788, now seen corresponding path program 41 times [2021-04-15 02:00:28,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:28,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123047200] [2021-04-15 02:00:28,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:28,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:28,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:28,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123047200] [2021-04-15 02:00:28,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:28,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:28,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418257337] [2021-04-15 02:00:28,372 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:28,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:28,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:28,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:28,372 INFO L87 Difference]: Start difference. First operand 550 states and 1857 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:28,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:28,401 INFO L93 Difference]: Finished difference Result 1123 states and 3550 transitions. [2021-04-15 02:00:28,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:28,402 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:28,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:28,404 INFO L225 Difference]: With dead ends: 1123 [2021-04-15 02:00:28,404 INFO L226 Difference]: Without dead ends: 1020 [2021-04-15 02:00:28,404 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 61.7ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:28,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1020 states. [2021-04-15 02:00:28,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1020 to 570. [2021-04-15 02:00:28,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 569 states have (on average 3.369068541300527) internal successors, (1917), 569 states have internal predecessors, (1917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:28,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 1917 transitions. [2021-04-15 02:00:28,416 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 1917 transitions. Word has length 21 [2021-04-15 02:00:28,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:28,416 INFO L480 AbstractCegarLoop]: Abstraction has 570 states and 1917 transitions. [2021-04-15 02:00:28,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:28,416 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 1917 transitions. [2021-04-15 02:00:28,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:28,417 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:28,417 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:28,417 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-04-15 02:00:28,417 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:28,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:28,417 INFO L82 PathProgramCache]: Analyzing trace with hash -945851962, now seen corresponding path program 42 times [2021-04-15 02:00:28,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:28,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197598137] [2021-04-15 02:00:28,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:28,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:28,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:28,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197598137] [2021-04-15 02:00:28,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:28,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:28,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878344483] [2021-04-15 02:00:28,489 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:28,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:28,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:28,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:28,489 INFO L87 Difference]: Start difference. First operand 570 states and 1917 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:28,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:28,520 INFO L93 Difference]: Finished difference Result 1099 states and 3462 transitions. [2021-04-15 02:00:28,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:28,520 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:28,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:28,522 INFO L225 Difference]: With dead ends: 1099 [2021-04-15 02:00:28,522 INFO L226 Difference]: Without dead ends: 937 [2021-04-15 02:00:28,522 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 60.7ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:28,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 937 states. [2021-04-15 02:00:28,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 937 to 542. [2021-04-15 02:00:28,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 3.388170055452865) internal successors, (1833), 541 states have internal predecessors, (1833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:28,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1833 transitions. [2021-04-15 02:00:28,532 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1833 transitions. Word has length 21 [2021-04-15 02:00:28,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:28,532 INFO L480 AbstractCegarLoop]: Abstraction has 542 states and 1833 transitions. [2021-04-15 02:00:28,533 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:28,533 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1833 transitions. [2021-04-15 02:00:28,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:28,533 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:28,533 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:28,534 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-04-15 02:00:28,534 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:28,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:28,534 INFO L82 PathProgramCache]: Analyzing trace with hash -97683814, now seen corresponding path program 43 times [2021-04-15 02:00:28,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:28,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539429447] [2021-04-15 02:00:28,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:28,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:28,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:28,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539429447] [2021-04-15 02:00:28,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:28,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:28,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401268142] [2021-04-15 02:00:28,584 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:28,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:28,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:28,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:28,585 INFO L87 Difference]: Start difference. First operand 542 states and 1833 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:28,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:28,625 INFO L93 Difference]: Finished difference Result 1063 states and 3365 transitions. [2021-04-15 02:00:28,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:28,625 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:28,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:28,626 INFO L225 Difference]: With dead ends: 1063 [2021-04-15 02:00:28,626 INFO L226 Difference]: Without dead ends: 960 [2021-04-15 02:00:28,627 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 59.5ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:28,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 960 states. [2021-04-15 02:00:28,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 960 to 554. [2021-04-15 02:00:28,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 553 states have (on average 3.3797468354430378) internal successors, (1869), 553 states have internal predecessors, (1869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:28,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 1869 transitions. [2021-04-15 02:00:28,638 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 1869 transitions. Word has length 21 [2021-04-15 02:00:28,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:28,638 INFO L480 AbstractCegarLoop]: Abstraction has 554 states and 1869 transitions. [2021-04-15 02:00:28,638 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:28,638 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 1869 transitions. [2021-04-15 02:00:28,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:28,639 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:28,639 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:28,639 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-04-15 02:00:28,639 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:28,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:28,639 INFO L82 PathProgramCache]: Analyzing trace with hash 150425316, now seen corresponding path program 44 times [2021-04-15 02:00:28,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:28,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000454549] [2021-04-15 02:00:28,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:28,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:28,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:28,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000454549] [2021-04-15 02:00:28,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:28,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:28,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832612282] [2021-04-15 02:00:28,692 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:28,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:28,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:28,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:28,692 INFO L87 Difference]: Start difference. First operand 554 states and 1869 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:28,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:28,723 INFO L93 Difference]: Finished difference Result 1063 states and 3357 transitions. [2021-04-15 02:00:28,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:28,723 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:28,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:28,725 INFO L225 Difference]: With dead ends: 1063 [2021-04-15 02:00:28,725 INFO L226 Difference]: Without dead ends: 952 [2021-04-15 02:00:28,725 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 51.8ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:28,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2021-04-15 02:00:28,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 546. [2021-04-15 02:00:28,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 545 states have (on average 3.385321100917431) internal successors, (1845), 545 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:28,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 1845 transitions. [2021-04-15 02:00:28,736 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 1845 transitions. Word has length 21 [2021-04-15 02:00:28,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:28,736 INFO L480 AbstractCegarLoop]: Abstraction has 546 states and 1845 transitions. [2021-04-15 02:00:28,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:28,736 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 1845 transitions. [2021-04-15 02:00:28,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:28,737 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:28,737 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:28,737 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-04-15 02:00:28,737 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:28,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:28,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1094782618, now seen corresponding path program 45 times [2021-04-15 02:00:28,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:28,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994886021] [2021-04-15 02:00:28,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:28,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:28,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:28,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994886021] [2021-04-15 02:00:28,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:28,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:28,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143077331] [2021-04-15 02:00:28,788 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:28,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:28,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:28,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:28,789 INFO L87 Difference]: Start difference. First operand 546 states and 1845 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:28,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:28,831 INFO L93 Difference]: Finished difference Result 1069 states and 3382 transitions. [2021-04-15 02:00:28,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:28,831 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:28,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:28,833 INFO L225 Difference]: With dead ends: 1069 [2021-04-15 02:00:28,833 INFO L226 Difference]: Without dead ends: 966 [2021-04-15 02:00:28,833 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 61.8ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:28,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 966 states. [2021-04-15 02:00:28,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 966 to 558. [2021-04-15 02:00:28,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 557 states have (on average 3.36983842010772) internal successors, (1877), 557 states have internal predecessors, (1877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:28,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 1877 transitions. [2021-04-15 02:00:28,844 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 1877 transitions. Word has length 21 [2021-04-15 02:00:28,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:28,844 INFO L480 AbstractCegarLoop]: Abstraction has 558 states and 1877 transitions. [2021-04-15 02:00:28,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:28,845 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 1877 transitions. [2021-04-15 02:00:28,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:28,845 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:28,845 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:28,845 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-04-15 02:00:28,846 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:28,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:28,846 INFO L82 PathProgramCache]: Analyzing trace with hash -421844740, now seen corresponding path program 46 times [2021-04-15 02:00:28,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:28,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738987903] [2021-04-15 02:00:28,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:28,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:28,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:28,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738987903] [2021-04-15 02:00:28,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:28,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:28,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212379043] [2021-04-15 02:00:28,902 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:28,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:28,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:28,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:28,902 INFO L87 Difference]: Start difference. First operand 558 states and 1877 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:28,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:28,948 INFO L93 Difference]: Finished difference Result 1083 states and 3419 transitions. [2021-04-15 02:00:28,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:28,949 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:28,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:28,951 INFO L225 Difference]: With dead ends: 1083 [2021-04-15 02:00:28,951 INFO L226 Difference]: Without dead ends: 954 [2021-04-15 02:00:28,951 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 67.5ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:28,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2021-04-15 02:00:28,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 546. [2021-04-15 02:00:28,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 545 states have (on average 3.377981651376147) internal successors, (1841), 545 states have internal predecessors, (1841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:28,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 1841 transitions. [2021-04-15 02:00:28,961 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 1841 transitions. Word has length 21 [2021-04-15 02:00:28,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:28,961 INFO L480 AbstractCegarLoop]: Abstraction has 546 states and 1841 transitions. [2021-04-15 02:00:28,961 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:28,961 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 1841 transitions. [2021-04-15 02:00:28,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:28,962 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:28,962 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:28,962 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-04-15 02:00:28,962 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:28,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:28,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1261878044, now seen corresponding path program 47 times [2021-04-15 02:00:28,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:28,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564224944] [2021-04-15 02:00:28,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:28,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:29,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:29,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564224944] [2021-04-15 02:00:29,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:29,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:29,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820542712] [2021-04-15 02:00:29,022 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:29,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:29,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:29,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:29,023 INFO L87 Difference]: Start difference. First operand 546 states and 1841 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:29,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:29,053 INFO L93 Difference]: Finished difference Result 1069 states and 3378 transitions. [2021-04-15 02:00:29,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:29,053 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:29,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:29,056 INFO L225 Difference]: With dead ends: 1069 [2021-04-15 02:00:29,056 INFO L226 Difference]: Without dead ends: 966 [2021-04-15 02:00:29,056 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 60.8ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:29,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 966 states. [2021-04-15 02:00:29,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 966 to 558. [2021-04-15 02:00:29,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 557 states have (on average 3.362657091561939) internal successors, (1873), 557 states have internal predecessors, (1873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:29,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 1873 transitions. [2021-04-15 02:00:29,070 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 1873 transitions. Word has length 21 [2021-04-15 02:00:29,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:29,070 INFO L480 AbstractCegarLoop]: Abstraction has 558 states and 1873 transitions. [2021-04-15 02:00:29,071 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:29,073 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 1873 transitions. [2021-04-15 02:00:29,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:29,075 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:29,075 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:29,076 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-04-15 02:00:29,076 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:29,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:29,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1464160710, now seen corresponding path program 48 times [2021-04-15 02:00:29,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:29,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014346293] [2021-04-15 02:00:29,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:29,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:29,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:29,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014346293] [2021-04-15 02:00:29,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:29,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:29,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188719369] [2021-04-15 02:00:29,153 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:29,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:29,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:29,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:29,154 INFO L87 Difference]: Start difference. First operand 558 states and 1873 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:29,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:29,198 INFO L93 Difference]: Finished difference Result 1045 states and 3290 transitions. [2021-04-15 02:00:29,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:29,199 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:29,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:29,200 INFO L225 Difference]: With dead ends: 1045 [2021-04-15 02:00:29,200 INFO L226 Difference]: Without dead ends: 906 [2021-04-15 02:00:29,201 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 88.1ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:29,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2021-04-15 02:00:29,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 536. [2021-04-15 02:00:29,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 535 states have (on average 3.4037383177570093) internal successors, (1821), 535 states have internal predecessors, (1821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:29,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 1821 transitions. [2021-04-15 02:00:29,211 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 1821 transitions. Word has length 21 [2021-04-15 02:00:29,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:29,211 INFO L480 AbstractCegarLoop]: Abstraction has 536 states and 1821 transitions. [2021-04-15 02:00:29,211 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:29,211 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 1821 transitions. [2021-04-15 02:00:29,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:29,212 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:29,212 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:29,212 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-04-15 02:00:29,212 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:29,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:29,212 INFO L82 PathProgramCache]: Analyzing trace with hash -65542594, now seen corresponding path program 49 times [2021-04-15 02:00:29,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:29,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856556050] [2021-04-15 02:00:29,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:29,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:29,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:29,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856556050] [2021-04-15 02:00:29,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:29,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:29,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699124466] [2021-04-15 02:00:29,275 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:29,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:29,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:29,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:29,275 INFO L87 Difference]: Start difference. First operand 536 states and 1821 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:29,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:29,306 INFO L93 Difference]: Finished difference Result 1187 states and 3775 transitions. [2021-04-15 02:00:29,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:29,307 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:29,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:29,309 INFO L225 Difference]: With dead ends: 1187 [2021-04-15 02:00:29,309 INFO L226 Difference]: Without dead ends: 1053 [2021-04-15 02:00:29,309 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 60.1ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:29,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1053 states. [2021-04-15 02:00:29,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1053 to 571. [2021-04-15 02:00:29,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 570 states have (on average 3.357894736842105) internal successors, (1914), 570 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:29,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 1914 transitions. [2021-04-15 02:00:29,320 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 1914 transitions. Word has length 21 [2021-04-15 02:00:29,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:29,320 INFO L480 AbstractCegarLoop]: Abstraction has 571 states and 1914 transitions. [2021-04-15 02:00:29,320 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:29,320 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 1914 transitions. [2021-04-15 02:00:29,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:29,321 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:29,321 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:29,321 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-04-15 02:00:29,321 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:29,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:29,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1815810562, now seen corresponding path program 50 times [2021-04-15 02:00:29,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:29,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256715000] [2021-04-15 02:00:29,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:29,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:29,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:29,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256715000] [2021-04-15 02:00:29,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:29,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:29,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591219881] [2021-04-15 02:00:29,379 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:29,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:29,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:29,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:29,379 INFO L87 Difference]: Start difference. First operand 571 states and 1914 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:29,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:29,424 INFO L93 Difference]: Finished difference Result 1170 states and 3698 transitions. [2021-04-15 02:00:29,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:29,425 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:29,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:29,426 INFO L225 Difference]: With dead ends: 1170 [2021-04-15 02:00:29,426 INFO L226 Difference]: Without dead ends: 1018 [2021-04-15 02:00:29,426 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 72.5ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:29,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1018 states. [2021-04-15 02:00:29,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1018 to 536. [2021-04-15 02:00:29,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 535 states have (on average 3.377570093457944) internal successors, (1807), 535 states have internal predecessors, (1807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:29,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 1807 transitions. [2021-04-15 02:00:29,437 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 1807 transitions. Word has length 21 [2021-04-15 02:00:29,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:29,437 INFO L480 AbstractCegarLoop]: Abstraction has 536 states and 1807 transitions. [2021-04-15 02:00:29,437 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:29,437 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 1807 transitions. [2021-04-15 02:00:29,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:29,438 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:29,438 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:29,438 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-04-15 02:00:29,438 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:29,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:29,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1227270116, now seen corresponding path program 51 times [2021-04-15 02:00:29,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:29,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151247993] [2021-04-15 02:00:29,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:29,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:29,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:29,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151247993] [2021-04-15 02:00:29,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:29,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:29,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636058436] [2021-04-15 02:00:29,510 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:29,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:29,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:29,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:29,510 INFO L87 Difference]: Start difference. First operand 536 states and 1807 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:29,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:29,545 INFO L93 Difference]: Finished difference Result 1127 states and 3565 transitions. [2021-04-15 02:00:29,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:29,545 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:29,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:29,547 INFO L225 Difference]: With dead ends: 1127 [2021-04-15 02:00:29,547 INFO L226 Difference]: Without dead ends: 1024 [2021-04-15 02:00:29,547 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 66.8ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:29,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2021-04-15 02:00:29,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 556. [2021-04-15 02:00:29,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 555 states have (on average 3.363963963963964) internal successors, (1867), 555 states have internal predecessors, (1867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:29,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 1867 transitions. [2021-04-15 02:00:29,558 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 1867 transitions. Word has length 21 [2021-04-15 02:00:29,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:29,558 INFO L480 AbstractCegarLoop]: Abstraction has 556 states and 1867 transitions. [2021-04-15 02:00:29,559 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:29,559 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 1867 transitions. [2021-04-15 02:00:29,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:29,559 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:29,560 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:29,560 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-04-15 02:00:29,560 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:29,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:29,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1477762430, now seen corresponding path program 52 times [2021-04-15 02:00:29,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:29,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937249] [2021-04-15 02:00:29,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:29,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:29,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:29,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937249] [2021-04-15 02:00:29,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:29,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:29,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044156754] [2021-04-15 02:00:29,628 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:29,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:29,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:29,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:29,628 INFO L87 Difference]: Start difference. First operand 556 states and 1867 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:29,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:29,668 INFO L93 Difference]: Finished difference Result 1158 states and 3652 transitions. [2021-04-15 02:00:29,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:29,668 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:29,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:29,670 INFO L225 Difference]: With dead ends: 1158 [2021-04-15 02:00:29,670 INFO L226 Difference]: Without dead ends: 1004 [2021-04-15 02:00:29,670 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 67.4ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:29,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1004 states. [2021-04-15 02:00:29,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1004 to 536. [2021-04-15 02:00:29,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 535 states have (on average 3.358878504672897) internal successors, (1797), 535 states have internal predecessors, (1797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:29,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 1797 transitions. [2021-04-15 02:00:29,683 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 1797 transitions. Word has length 21 [2021-04-15 02:00:29,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:29,683 INFO L480 AbstractCegarLoop]: Abstraction has 536 states and 1797 transitions. [2021-04-15 02:00:29,683 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:29,683 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 1797 transitions. [2021-04-15 02:00:29,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:29,684 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:29,684 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:29,684 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-04-15 02:00:29,684 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:29,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:29,688 INFO L82 PathProgramCache]: Analyzing trace with hash -146207490, now seen corresponding path program 53 times [2021-04-15 02:00:29,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:29,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812981111] [2021-04-15 02:00:29,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:29,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:29,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:29,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812981111] [2021-04-15 02:00:29,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:29,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:29,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357692309] [2021-04-15 02:00:29,752 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:29,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:29,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:29,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:29,753 INFO L87 Difference]: Start difference. First operand 536 states and 1797 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:29,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:29,786 INFO L93 Difference]: Finished difference Result 1102 states and 3477 transitions. [2021-04-15 02:00:29,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:29,786 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:29,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:29,788 INFO L225 Difference]: With dead ends: 1102 [2021-04-15 02:00:29,788 INFO L226 Difference]: Without dead ends: 999 [2021-04-15 02:00:29,788 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 65.2ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:29,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 999 states. [2021-04-15 02:00:29,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 999 to 548. [2021-04-15 02:00:29,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 547 states have (on average 3.343692870201097) internal successors, (1829), 547 states have internal predecessors, (1829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:29,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 1829 transitions. [2021-04-15 02:00:29,798 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 1829 transitions. Word has length 21 [2021-04-15 02:00:29,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:29,798 INFO L480 AbstractCegarLoop]: Abstraction has 548 states and 1829 transitions. [2021-04-15 02:00:29,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:29,798 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 1829 transitions. [2021-04-15 02:00:29,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:29,799 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:29,799 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:29,799 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-04-15 02:00:29,799 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:29,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:29,799 INFO L82 PathProgramCache]: Analyzing trace with hash 862090494, now seen corresponding path program 54 times [2021-04-15 02:00:29,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:29,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450290896] [2021-04-15 02:00:29,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:29,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:29,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:29,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450290896] [2021-04-15 02:00:29,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:29,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:29,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787700424] [2021-04-15 02:00:29,877 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:29,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:29,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:29,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:29,878 INFO L87 Difference]: Start difference. First operand 548 states and 1829 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:29,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:29,922 INFO L93 Difference]: Finished difference Result 1116 states and 3514 transitions. [2021-04-15 02:00:29,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:29,923 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:29,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:29,924 INFO L225 Difference]: With dead ends: 1116 [2021-04-15 02:00:29,924 INFO L226 Difference]: Without dead ends: 973 [2021-04-15 02:00:29,924 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 90.3ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:29,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2021-04-15 02:00:29,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 522. [2021-04-15 02:00:29,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 521 states have (on average 3.380038387715931) internal successors, (1761), 521 states have internal predecessors, (1761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:29,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 1761 transitions. [2021-04-15 02:00:29,934 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 1761 transitions. Word has length 21 [2021-04-15 02:00:29,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:29,934 INFO L480 AbstractCegarLoop]: Abstraction has 522 states and 1761 transitions. [2021-04-15 02:00:29,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:29,934 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 1761 transitions. [2021-04-15 02:00:29,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:29,935 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:29,935 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:29,935 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-04-15 02:00:29,935 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:29,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:29,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1027090720, now seen corresponding path program 55 times [2021-04-15 02:00:29,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:29,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633304594] [2021-04-15 02:00:29,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:29,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:29,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:29,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633304594] [2021-04-15 02:00:29,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:29,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:29,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932428351] [2021-04-15 02:00:29,990 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:29,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:29,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:29,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:29,990 INFO L87 Difference]: Start difference. First operand 522 states and 1761 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:30,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:30,021 INFO L93 Difference]: Finished difference Result 1162 states and 3689 transitions. [2021-04-15 02:00:30,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:30,022 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:30,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:30,023 INFO L225 Difference]: With dead ends: 1162 [2021-04-15 02:00:30,023 INFO L226 Difference]: Without dead ends: 1028 [2021-04-15 02:00:30,023 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 55.4ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:30,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1028 states. [2021-04-15 02:00:30,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1028 to 522. [2021-04-15 02:00:30,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 521 states have (on average 3.328214971209213) internal successors, (1734), 521 states have internal predecessors, (1734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:30,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 1734 transitions. [2021-04-15 02:00:30,033 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 1734 transitions. Word has length 21 [2021-04-15 02:00:30,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:30,033 INFO L480 AbstractCegarLoop]: Abstraction has 522 states and 1734 transitions. [2021-04-15 02:00:30,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:30,033 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 1734 transitions. [2021-04-15 02:00:30,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:30,034 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:30,034 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:30,034 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-04-15 02:00:30,034 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:30,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:30,035 INFO L82 PathProgramCache]: Analyzing trace with hash -723177248, now seen corresponding path program 56 times [2021-04-15 02:00:30,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:30,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171615430] [2021-04-15 02:00:30,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:30,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:30,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:30,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171615430] [2021-04-15 02:00:30,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:30,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:30,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936980936] [2021-04-15 02:00:30,089 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:30,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:30,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:30,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:30,090 INFO L87 Difference]: Start difference. First operand 522 states and 1734 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:30,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:30,134 INFO L93 Difference]: Finished difference Result 1145 states and 3612 transitions. [2021-04-15 02:00:30,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:30,135 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:30,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:30,136 INFO L225 Difference]: With dead ends: 1145 [2021-04-15 02:00:30,136 INFO L226 Difference]: Without dead ends: 993 [2021-04-15 02:00:30,136 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 69.2ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:30,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 993 states. [2021-04-15 02:00:30,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 993 to 487. [2021-04-15 02:00:30,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 3.3415637860082303) internal successors, (1624), 486 states have internal predecessors, (1624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:30,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 1624 transitions. [2021-04-15 02:00:30,146 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 1624 transitions. Word has length 21 [2021-04-15 02:00:30,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:30,146 INFO L480 AbstractCegarLoop]: Abstraction has 487 states and 1624 transitions. [2021-04-15 02:00:30,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:30,146 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 1624 transitions. [2021-04-15 02:00:30,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:30,147 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:30,147 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:30,147 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-04-15 02:00:30,147 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:30,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:30,147 INFO L82 PathProgramCache]: Analyzing trace with hash -259594400, now seen corresponding path program 57 times [2021-04-15 02:00:30,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:30,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013536025] [2021-04-15 02:00:30,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:30,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:30,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:30,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013536025] [2021-04-15 02:00:30,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:30,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:30,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926979577] [2021-04-15 02:00:30,202 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:30,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:30,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:30,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:30,202 INFO L87 Difference]: Start difference. First operand 487 states and 1624 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:30,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:30,235 INFO L93 Difference]: Finished difference Result 1096 states and 3469 transitions. [2021-04-15 02:00:30,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:30,236 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:30,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:30,237 INFO L225 Difference]: With dead ends: 1096 [2021-04-15 02:00:30,237 INFO L226 Difference]: Without dead ends: 962 [2021-04-15 02:00:30,237 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 57.1ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:30,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 962 states. [2021-04-15 02:00:30,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 962 to 513. [2021-04-15 02:00:30,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 512 states have (on average 3.310546875) internal successors, (1695), 512 states have internal predecessors, (1695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:30,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 1695 transitions. [2021-04-15 02:00:30,247 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 1695 transitions. Word has length 21 [2021-04-15 02:00:30,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:30,247 INFO L480 AbstractCegarLoop]: Abstraction has 513 states and 1695 transitions. [2021-04-15 02:00:30,247 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:30,247 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 1695 transitions. [2021-04-15 02:00:30,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:30,248 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:30,248 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:30,248 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-04-15 02:00:30,248 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:30,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:30,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1004689982, now seen corresponding path program 58 times [2021-04-15 02:00:30,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:30,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396460088] [2021-04-15 02:00:30,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:30,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:30,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:30,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396460088] [2021-04-15 02:00:30,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:30,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:30,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632723640] [2021-04-15 02:00:30,301 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:30,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:30,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:30,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:30,302 INFO L87 Difference]: Start difference. First operand 513 states and 1695 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:30,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:30,345 INFO L93 Difference]: Finished difference Result 997 states and 3171 transitions. [2021-04-15 02:00:30,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:30,345 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:30,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:30,346 INFO L225 Difference]: With dead ends: 997 [2021-04-15 02:00:30,346 INFO L226 Difference]: Without dead ends: 856 [2021-04-15 02:00:30,347 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 63.9ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:30,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2021-04-15 02:00:30,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 487. [2021-04-15 02:00:30,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 3.314814814814815) internal successors, (1611), 486 states have internal predecessors, (1611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:30,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 1611 transitions. [2021-04-15 02:00:30,355 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 1611 transitions. Word has length 21 [2021-04-15 02:00:30,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:30,355 INFO L480 AbstractCegarLoop]: Abstraction has 487 states and 1611 transitions. [2021-04-15 02:00:30,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:30,355 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 1611 transitions. [2021-04-15 02:00:30,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:30,356 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:30,356 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:30,356 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-04-15 02:00:30,356 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:30,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:30,357 INFO L82 PathProgramCache]: Analyzing trace with hash -2107940354, now seen corresponding path program 59 times [2021-04-15 02:00:30,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:30,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610280754] [2021-04-15 02:00:30,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:30,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:30,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:30,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610280754] [2021-04-15 02:00:30,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:30,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:30,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60242634] [2021-04-15 02:00:30,414 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:30,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:30,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:30,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:30,414 INFO L87 Difference]: Start difference. First operand 487 states and 1611 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:30,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:30,460 INFO L93 Difference]: Finished difference Result 1071 states and 3378 transitions. [2021-04-15 02:00:30,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:30,460 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:30,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:30,461 INFO L225 Difference]: With dead ends: 1071 [2021-04-15 02:00:30,462 INFO L226 Difference]: Without dead ends: 954 [2021-04-15 02:00:30,462 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 66.8ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:30,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2021-04-15 02:00:30,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 505. [2021-04-15 02:00:30,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 3.2976190476190474) internal successors, (1662), 504 states have internal predecessors, (1662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:30,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1662 transitions. [2021-04-15 02:00:30,472 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1662 transitions. Word has length 21 [2021-04-15 02:00:30,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:30,472 INFO L480 AbstractCegarLoop]: Abstraction has 505 states and 1662 transitions. [2021-04-15 02:00:30,472 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:30,473 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1662 transitions. [2021-04-15 02:00:30,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:30,473 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:30,473 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:30,473 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2021-04-15 02:00:30,473 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:30,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:30,474 INFO L82 PathProgramCache]: Analyzing trace with hash 597092192, now seen corresponding path program 60 times [2021-04-15 02:00:30,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:30,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239227778] [2021-04-15 02:00:30,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:30,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:30,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:30,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239227778] [2021-04-15 02:00:30,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:30,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:30,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846463893] [2021-04-15 02:00:30,545 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:30,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:30,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:30,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:30,546 INFO L87 Difference]: Start difference. First operand 505 states and 1662 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:30,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:30,597 INFO L93 Difference]: Finished difference Result 989 states and 3138 transitions. [2021-04-15 02:00:30,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:30,598 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:30,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:30,599 INFO L225 Difference]: With dead ends: 989 [2021-04-15 02:00:30,599 INFO L226 Difference]: Without dead ends: 835 [2021-04-15 02:00:30,599 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 67.3ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:30,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2021-04-15 02:00:30,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 466. [2021-04-15 02:00:30,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 3.3483870967741933) internal successors, (1557), 465 states have internal predecessors, (1557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:30,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 1557 transitions. [2021-04-15 02:00:30,609 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 1557 transitions. Word has length 21 [2021-04-15 02:00:30,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:30,609 INFO L480 AbstractCegarLoop]: Abstraction has 466 states and 1557 transitions. [2021-04-15 02:00:30,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:30,610 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 1557 transitions. [2021-04-15 02:00:30,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:30,610 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:30,610 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:30,611 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2021-04-15 02:00:30,611 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:30,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:30,611 INFO L82 PathProgramCache]: Analyzing trace with hash 193554622, now seen corresponding path program 61 times [2021-04-15 02:00:30,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:30,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565651070] [2021-04-15 02:00:30,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:30,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:30,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:30,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565651070] [2021-04-15 02:00:30,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:30,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:30,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566959561] [2021-04-15 02:00:30,677 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:30,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:30,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:30,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:30,677 INFO L87 Difference]: Start difference. First operand 466 states and 1557 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:30,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:30,719 INFO L93 Difference]: Finished difference Result 1016 states and 3201 transitions. [2021-04-15 02:00:30,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:30,719 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:30,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:30,720 INFO L225 Difference]: With dead ends: 1016 [2021-04-15 02:00:30,720 INFO L226 Difference]: Without dead ends: 913 [2021-04-15 02:00:30,721 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 66.7ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:30,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 913 states. [2021-04-15 02:00:30,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 913 to 496. [2021-04-15 02:00:30,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 495 states have (on average 3.3494949494949493) internal successors, (1658), 495 states have internal predecessors, (1658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:30,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 1658 transitions. [2021-04-15 02:00:30,732 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 1658 transitions. Word has length 21 [2021-04-15 02:00:30,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:30,732 INFO L480 AbstractCegarLoop]: Abstraction has 496 states and 1658 transitions. [2021-04-15 02:00:30,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:30,732 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 1658 transitions. [2021-04-15 02:00:30,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:30,733 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:30,733 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:30,733 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-04-15 02:00:30,733 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:30,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:30,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1396380128, now seen corresponding path program 62 times [2021-04-15 02:00:30,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:30,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349645082] [2021-04-15 02:00:30,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:30,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:30,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:30,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349645082] [2021-04-15 02:00:30,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:30,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:30,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146009876] [2021-04-15 02:00:30,795 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:30,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:30,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:30,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:30,795 INFO L87 Difference]: Start difference. First operand 496 states and 1658 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:30,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:30,832 INFO L93 Difference]: Finished difference Result 1047 states and 3288 transitions. [2021-04-15 02:00:30,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:30,832 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:30,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:30,833 INFO L225 Difference]: With dead ends: 1047 [2021-04-15 02:00:30,833 INFO L226 Difference]: Without dead ends: 893 [2021-04-15 02:00:30,833 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 63.9ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:30,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2021-04-15 02:00:30,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 476. [2021-04-15 02:00:30,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 3.343157894736842) internal successors, (1588), 475 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:30,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 1588 transitions. [2021-04-15 02:00:30,842 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 1588 transitions. Word has length 21 [2021-04-15 02:00:30,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:30,842 INFO L480 AbstractCegarLoop]: Abstraction has 476 states and 1588 transitions. [2021-04-15 02:00:30,842 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:30,842 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 1588 transitions. [2021-04-15 02:00:30,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:30,843 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:30,843 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:30,843 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2021-04-15 02:00:30,843 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:30,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:30,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1494691650, now seen corresponding path program 63 times [2021-04-15 02:00:30,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:30,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742743400] [2021-04-15 02:00:30,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:30,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:30,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:30,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742743400] [2021-04-15 02:00:30,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:30,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:30,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024151976] [2021-04-15 02:00:30,900 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:30,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:30,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:30,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:30,901 INFO L87 Difference]: Start difference. First operand 476 states and 1588 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:30,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:30,933 INFO L93 Difference]: Finished difference Result 1020 states and 3207 transitions. [2021-04-15 02:00:30,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:30,934 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:30,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:30,935 INFO L225 Difference]: With dead ends: 1020 [2021-04-15 02:00:30,935 INFO L226 Difference]: Without dead ends: 917 [2021-04-15 02:00:30,935 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 52.6ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:30,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 917 states. [2021-04-15 02:00:30,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 917 to 488. [2021-04-15 02:00:30,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 487 states have (on average 3.326488706365503) internal successors, (1620), 487 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:30,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 1620 transitions. [2021-04-15 02:00:30,944 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 1620 transitions. Word has length 21 [2021-04-15 02:00:30,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:30,944 INFO L480 AbstractCegarLoop]: Abstraction has 488 states and 1620 transitions. [2021-04-15 02:00:30,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:30,944 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 1620 transitions. [2021-04-15 02:00:30,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:30,945 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:30,945 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:30,945 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2021-04-15 02:00:30,945 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:30,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:30,946 INFO L82 PathProgramCache]: Analyzing trace with hash 185804990, now seen corresponding path program 64 times [2021-04-15 02:00:30,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:30,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135441545] [2021-04-15 02:00:30,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:30,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:31,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:31,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135441545] [2021-04-15 02:00:31,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:31,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:31,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911049105] [2021-04-15 02:00:31,005 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:31,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:31,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:31,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:31,006 INFO L87 Difference]: Start difference. First operand 488 states and 1620 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:31,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:31,052 INFO L93 Difference]: Finished difference Result 952 states and 3022 transitions. [2021-04-15 02:00:31,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:31,052 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:31,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:31,053 INFO L225 Difference]: With dead ends: 952 [2021-04-15 02:00:31,053 INFO L226 Difference]: Without dead ends: 825 [2021-04-15 02:00:31,053 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 68.3ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:31,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2021-04-15 02:00:31,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 476. [2021-04-15 02:00:31,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 3.3305263157894736) internal successors, (1582), 475 states have internal predecessors, (1582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:31,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 1582 transitions. [2021-04-15 02:00:31,062 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 1582 transitions. Word has length 21 [2021-04-15 02:00:31,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:31,062 INFO L480 AbstractCegarLoop]: Abstraction has 476 states and 1582 transitions. [2021-04-15 02:00:31,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:31,062 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 1582 transitions. [2021-04-15 02:00:31,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:31,062 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:31,062 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:31,063 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2021-04-15 02:00:31,063 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:31,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:31,063 INFO L82 PathProgramCache]: Analyzing trace with hash -77529696, now seen corresponding path program 65 times [2021-04-15 02:00:31,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:31,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467072857] [2021-04-15 02:00:31,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:31,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:31,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:31,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467072857] [2021-04-15 02:00:31,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:31,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:31,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131581479] [2021-04-15 02:00:31,120 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:31,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:31,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:31,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:31,120 INFO L87 Difference]: Start difference. First operand 476 states and 1582 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:31,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:31,149 INFO L93 Difference]: Finished difference Result 984 states and 3081 transitions. [2021-04-15 02:00:31,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:31,149 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:31,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:31,150 INFO L225 Difference]: With dead ends: 984 [2021-04-15 02:00:31,150 INFO L226 Difference]: Without dead ends: 850 [2021-04-15 02:00:31,151 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 52.8ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:31,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2021-04-15 02:00:31,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 502. [2021-04-15 02:00:31,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 501 states have (on average 3.2994011976047903) internal successors, (1653), 501 states have internal predecessors, (1653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:31,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 1653 transitions. [2021-04-15 02:00:31,159 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 1653 transitions. Word has length 21 [2021-04-15 02:00:31,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:31,160 INFO L480 AbstractCegarLoop]: Abstraction has 502 states and 1653 transitions. [2021-04-15 02:00:31,160 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:31,160 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 1653 transitions. [2021-04-15 02:00:31,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:31,160 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:31,161 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:31,161 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2021-04-15 02:00:31,161 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:31,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:31,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1469674242, now seen corresponding path program 66 times [2021-04-15 02:00:31,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:31,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935557113] [2021-04-15 02:00:31,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:31,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:31,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:31,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935557113] [2021-04-15 02:00:31,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:31,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:31,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592051900] [2021-04-15 02:00:31,217 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:31,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:31,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:31,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:31,217 INFO L87 Difference]: Start difference. First operand 502 states and 1653 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:31,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:31,263 INFO L93 Difference]: Finished difference Result 885 states and 2783 transitions. [2021-04-15 02:00:31,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:31,264 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:31,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:31,265 INFO L225 Difference]: With dead ends: 885 [2021-04-15 02:00:31,265 INFO L226 Difference]: Without dead ends: 734 [2021-04-15 02:00:31,265 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 72.9ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:31,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2021-04-15 02:00:31,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 466. [2021-04-15 02:00:31,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 3.3376344086021503) internal successors, (1552), 465 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:31,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 1552 transitions. [2021-04-15 02:00:31,273 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 1552 transitions. Word has length 21 [2021-04-15 02:00:31,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:31,273 INFO L480 AbstractCegarLoop]: Abstraction has 466 states and 1552 transitions. [2021-04-15 02:00:31,273 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:31,273 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 1552 transitions. [2021-04-15 02:00:31,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:31,274 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:31,274 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:31,274 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2021-04-15 02:00:31,274 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:31,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:31,274 INFO L82 PathProgramCache]: Analyzing trace with hash 581559584, now seen corresponding path program 67 times [2021-04-15 02:00:31,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:31,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753411325] [2021-04-15 02:00:31,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:31,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:31,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:31,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753411325] [2021-04-15 02:00:31,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:31,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:31,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199808830] [2021-04-15 02:00:31,337 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:31,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:31,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:31,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:31,338 INFO L87 Difference]: Start difference. First operand 466 states and 1552 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:31,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:31,370 INFO L93 Difference]: Finished difference Result 979 states and 3074 transitions. [2021-04-15 02:00:31,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:31,370 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:31,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:31,371 INFO L225 Difference]: With dead ends: 979 [2021-04-15 02:00:31,372 INFO L226 Difference]: Without dead ends: 876 [2021-04-15 02:00:31,372 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 64.5ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:31,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 876 states. [2021-04-15 02:00:31,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 876 to 484. [2021-04-15 02:00:31,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 3.331262939958592) internal successors, (1609), 483 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:31,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 1609 transitions. [2021-04-15 02:00:31,381 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 1609 transitions. Word has length 21 [2021-04-15 02:00:31,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:31,381 INFO L480 AbstractCegarLoop]: Abstraction has 484 states and 1609 transitions. [2021-04-15 02:00:31,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:31,381 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 1609 transitions. [2021-04-15 02:00:31,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:31,383 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:31,383 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:31,383 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2021-04-15 02:00:31,383 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:31,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:31,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1589857568, now seen corresponding path program 68 times [2021-04-15 02:00:31,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:31,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664662317] [2021-04-15 02:00:31,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:31,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:31,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:31,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664662317] [2021-04-15 02:00:31,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:31,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:31,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423496481] [2021-04-15 02:00:31,444 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:31,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:31,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:31,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:31,444 INFO L87 Difference]: Start difference. First operand 484 states and 1609 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:31,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:31,492 INFO L93 Difference]: Finished difference Result 993 states and 3111 transitions. [2021-04-15 02:00:31,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:31,492 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:31,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:31,494 INFO L225 Difference]: With dead ends: 993 [2021-04-15 02:00:31,494 INFO L226 Difference]: Without dead ends: 864 [2021-04-15 02:00:31,494 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 74.8ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:31,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 864 states. [2021-04-15 02:00:31,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 864 to 472. [2021-04-15 02:00:31,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 471 states have (on average 3.335456475583864) internal successors, (1571), 471 states have internal predecessors, (1571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:31,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 1571 transitions. [2021-04-15 02:00:31,502 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 1571 transitions. Word has length 21 [2021-04-15 02:00:31,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:31,503 INFO L480 AbstractCegarLoop]: Abstraction has 472 states and 1571 transitions. [2021-04-15 02:00:31,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:31,503 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 1571 transitions. [2021-04-15 02:00:31,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:31,503 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:31,503 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:31,503 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2021-04-15 02:00:31,504 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:31,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:31,504 INFO L82 PathProgramCache]: Analyzing trace with hash -265237378, now seen corresponding path program 69 times [2021-04-15 02:00:31,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:31,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585429391] [2021-04-15 02:00:31,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:31,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:31,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:31,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585429391] [2021-04-15 02:00:31,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:31,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:31,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698685250] [2021-04-15 02:00:31,562 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:31,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:31,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:31,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:31,562 INFO L87 Difference]: Start difference. First operand 472 states and 1571 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:31,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:31,594 INFO L93 Difference]: Finished difference Result 991 states and 3112 transitions. [2021-04-15 02:00:31,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:31,595 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:31,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:31,596 INFO L225 Difference]: With dead ends: 991 [2021-04-15 02:00:31,596 INFO L226 Difference]: Without dead ends: 888 [2021-04-15 02:00:31,596 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 54.7ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:31,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 888 states. [2021-04-15 02:00:31,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 888 to 484. [2021-04-15 02:00:31,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 3.318840579710145) internal successors, (1603), 483 states have internal predecessors, (1603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:31,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 1603 transitions. [2021-04-15 02:00:31,605 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 1603 transitions. Word has length 21 [2021-04-15 02:00:31,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:31,605 INFO L480 AbstractCegarLoop]: Abstraction has 484 states and 1603 transitions. [2021-04-15 02:00:31,605 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:31,605 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 1603 transitions. [2021-04-15 02:00:31,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:31,606 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:31,606 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:31,606 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2021-04-15 02:00:31,606 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:31,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:31,606 INFO L82 PathProgramCache]: Analyzing trace with hash -295097056, now seen corresponding path program 70 times [2021-04-15 02:00:31,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:31,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383516686] [2021-04-15 02:00:31,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:31,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:31,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:31,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383516686] [2021-04-15 02:00:31,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:31,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:31,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41036849] [2021-04-15 02:00:31,657 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:31,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:31,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:31,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:31,658 INFO L87 Difference]: Start difference. First operand 484 states and 1603 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:31,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:31,699 INFO L93 Difference]: Finished difference Result 923 states and 2927 transitions. [2021-04-15 02:00:31,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:31,700 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:31,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:31,701 INFO L225 Difference]: With dead ends: 923 [2021-04-15 02:00:31,701 INFO L226 Difference]: Without dead ends: 796 [2021-04-15 02:00:31,701 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 63.5ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:31,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 796 states. [2021-04-15 02:00:31,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 796 to 472. [2021-04-15 02:00:31,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 471 states have (on average 3.3227176220806793) internal successors, (1565), 471 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:31,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 1565 transitions. [2021-04-15 02:00:31,709 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 1565 transitions. Word has length 21 [2021-04-15 02:00:31,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:31,709 INFO L480 AbstractCegarLoop]: Abstraction has 472 states and 1565 transitions. [2021-04-15 02:00:31,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:31,709 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 1565 transitions. [2021-04-15 02:00:31,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:31,710 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:31,710 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:31,710 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2021-04-15 02:00:31,710 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:31,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:31,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1639425312, now seen corresponding path program 71 times [2021-04-15 02:00:31,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:31,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989989223] [2021-04-15 02:00:31,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:31,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:31,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:31,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989989223] [2021-04-15 02:00:31,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:31,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:31,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809795119] [2021-04-15 02:00:31,763 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:31,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:31,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:31,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:31,763 INFO L87 Difference]: Start difference. First operand 472 states and 1565 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:31,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:31,809 INFO L93 Difference]: Finished difference Result 955 states and 2986 transitions. [2021-04-15 02:00:31,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:31,809 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:31,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:31,811 INFO L225 Difference]: With dead ends: 955 [2021-04-15 02:00:31,811 INFO L226 Difference]: Without dead ends: 838 [2021-04-15 02:00:31,811 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 67.5ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:31,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2021-04-15 02:00:31,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 490. [2021-04-15 02:00:31,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 3.3047034764826178) internal successors, (1616), 489 states have internal predecessors, (1616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:31,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1616 transitions. [2021-04-15 02:00:31,820 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1616 transitions. Word has length 21 [2021-04-15 02:00:31,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:31,820 INFO L480 AbstractCegarLoop]: Abstraction has 490 states and 1616 transitions. [2021-04-15 02:00:31,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:31,820 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1616 transitions. [2021-04-15 02:00:31,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:31,821 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:31,821 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:31,821 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2021-04-15 02:00:31,821 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:31,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:31,821 INFO L82 PathProgramCache]: Analyzing trace with hash -403911682, now seen corresponding path program 72 times [2021-04-15 02:00:31,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:31,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829081972] [2021-04-15 02:00:31,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:31,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:31,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:31,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829081972] [2021-04-15 02:00:31,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:31,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:31,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822064007] [2021-04-15 02:00:31,873 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:31,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:31,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:31,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:31,873 INFO L87 Difference]: Start difference. First operand 490 states and 1616 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:31,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:31,918 INFO L93 Difference]: Finished difference Result 873 states and 2746 transitions. [2021-04-15 02:00:31,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:31,919 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:31,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:31,920 INFO L225 Difference]: With dead ends: 873 [2021-04-15 02:00:31,920 INFO L226 Difference]: Without dead ends: 725 [2021-04-15 02:00:31,920 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 63.9ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:31,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2021-04-15 02:00:31,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 457. [2021-04-15 02:00:31,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 456 states have (on average 3.3640350877192984) internal successors, (1534), 456 states have internal predecessors, (1534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:31,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 1534 transitions. [2021-04-15 02:00:31,928 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 1534 transitions. Word has length 21 [2021-04-15 02:00:31,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:31,928 INFO L480 AbstractCegarLoop]: Abstraction has 457 states and 1534 transitions. [2021-04-15 02:00:31,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:31,928 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 1534 transitions. [2021-04-15 02:00:31,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:31,928 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:31,929 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:31,929 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2021-04-15 02:00:31,929 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:31,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:31,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1845007066, now seen corresponding path program 73 times [2021-04-15 02:00:31,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:31,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104510956] [2021-04-15 02:00:31,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:31,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:31,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:31,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104510956] [2021-04-15 02:00:31,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:31,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:31,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304763987] [2021-04-15 02:00:31,987 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:31,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:31,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:31,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:31,988 INFO L87 Difference]: Start difference. First operand 457 states and 1534 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:32,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:32,028 INFO L93 Difference]: Finished difference Result 912 states and 2837 transitions. [2021-04-15 02:00:32,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:32,029 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:32,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:32,030 INFO L225 Difference]: With dead ends: 912 [2021-04-15 02:00:32,030 INFO L226 Difference]: Without dead ends: 809 [2021-04-15 02:00:32,030 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 69.5ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:32,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2021-04-15 02:00:32,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 465. [2021-04-15 02:00:32,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 3.3491379310344827) internal successors, (1554), 464 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:32,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 1554 transitions. [2021-04-15 02:00:32,038 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 1554 transitions. Word has length 21 [2021-04-15 02:00:32,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:32,038 INFO L480 AbstractCegarLoop]: Abstraction has 465 states and 1554 transitions. [2021-04-15 02:00:32,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:32,038 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 1554 transitions. [2021-04-15 02:00:32,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:32,039 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:32,039 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:32,039 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2021-04-15 02:00:32,039 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:32,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:32,039 INFO L82 PathProgramCache]: Analyzing trace with hash 2093116196, now seen corresponding path program 74 times [2021-04-15 02:00:32,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:32,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043310429] [2021-04-15 02:00:32,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:32,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:32,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:32,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043310429] [2021-04-15 02:00:32,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:32,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:32,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453147964] [2021-04-15 02:00:32,116 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:32,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:32,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:32,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:32,116 INFO L87 Difference]: Start difference. First operand 465 states and 1554 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:32,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:32,147 INFO L93 Difference]: Finished difference Result 912 states and 2829 transitions. [2021-04-15 02:00:32,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:32,148 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:32,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:32,149 INFO L225 Difference]: With dead ends: 912 [2021-04-15 02:00:32,149 INFO L226 Difference]: Without dead ends: 801 [2021-04-15 02:00:32,149 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 64.1ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:32,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 801 states. [2021-04-15 02:00:32,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 801 to 457. [2021-04-15 02:00:32,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 456 states have (on average 3.3552631578947367) internal successors, (1530), 456 states have internal predecessors, (1530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:32,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 1530 transitions. [2021-04-15 02:00:32,157 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 1530 transitions. Word has length 21 [2021-04-15 02:00:32,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:32,157 INFO L480 AbstractCegarLoop]: Abstraction has 457 states and 1530 transitions. [2021-04-15 02:00:32,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:32,157 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 1530 transitions. [2021-04-15 02:00:32,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:32,158 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:32,158 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:32,158 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2021-04-15 02:00:32,158 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:32,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:32,158 INFO L82 PathProgramCache]: Analyzing trace with hash -198329928, now seen corresponding path program 75 times [2021-04-15 02:00:32,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:32,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168191780] [2021-04-15 02:00:32,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:32,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:32,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:32,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168191780] [2021-04-15 02:00:32,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:32,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:32,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180918402] [2021-04-15 02:00:32,223 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:32,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:32,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:32,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:32,224 INFO L87 Difference]: Start difference. First operand 457 states and 1530 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:32,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:32,263 INFO L93 Difference]: Finished difference Result 955 states and 2976 transitions. [2021-04-15 02:00:32,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:32,263 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:32,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:32,264 INFO L225 Difference]: With dead ends: 955 [2021-04-15 02:00:32,264 INFO L226 Difference]: Without dead ends: 852 [2021-04-15 02:00:32,265 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 77.1ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:32,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2021-04-15 02:00:32,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 477. [2021-04-15 02:00:32,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 3.3403361344537816) internal successors, (1590), 476 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:32,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 1590 transitions. [2021-04-15 02:00:32,273 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 1590 transitions. Word has length 21 [2021-04-15 02:00:32,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:32,273 INFO L480 AbstractCegarLoop]: Abstraction has 477 states and 1590 transitions. [2021-04-15 02:00:32,273 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:32,273 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 1590 transitions. [2021-04-15 02:00:32,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:32,275 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:32,275 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:32,275 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2021-04-15 02:00:32,275 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:32,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:32,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1057334118, now seen corresponding path program 76 times [2021-04-15 02:00:32,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:32,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581564876] [2021-04-15 02:00:32,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:32,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:32,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:32,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581564876] [2021-04-15 02:00:32,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:32,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:32,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934085882] [2021-04-15 02:00:32,352 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:32,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:32,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:32,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:32,353 INFO L87 Difference]: Start difference. First operand 477 states and 1590 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:32,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:32,386 INFO L93 Difference]: Finished difference Result 986 states and 3063 transitions. [2021-04-15 02:00:32,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:32,386 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:32,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:32,387 INFO L225 Difference]: With dead ends: 986 [2021-04-15 02:00:32,387 INFO L226 Difference]: Without dead ends: 832 [2021-04-15 02:00:32,387 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 74.1ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:32,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2021-04-15 02:00:32,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 457. [2021-04-15 02:00:32,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 456 states have (on average 3.337719298245614) internal successors, (1522), 456 states have internal predecessors, (1522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:32,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 1522 transitions. [2021-04-15 02:00:32,395 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 1522 transitions. Word has length 21 [2021-04-15 02:00:32,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:32,395 INFO L480 AbstractCegarLoop]: Abstraction has 457 states and 1522 transitions. [2021-04-15 02:00:32,395 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:32,395 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 1522 transitions. [2021-04-15 02:00:32,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:32,396 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:32,396 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:32,396 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2021-04-15 02:00:32,396 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:32,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:32,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1739976706, now seen corresponding path program 77 times [2021-04-15 02:00:32,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:32,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688649031] [2021-04-15 02:00:32,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:32,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:32,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:32,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688649031] [2021-04-15 02:00:32,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:32,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:32,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425169819] [2021-04-15 02:00:32,463 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:32,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:32,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:32,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:32,463 INFO L87 Difference]: Start difference. First operand 457 states and 1522 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:32,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:32,492 INFO L93 Difference]: Finished difference Result 955 states and 2968 transitions. [2021-04-15 02:00:32,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:32,492 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:32,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:32,494 INFO L225 Difference]: With dead ends: 955 [2021-04-15 02:00:32,494 INFO L226 Difference]: Without dead ends: 852 [2021-04-15 02:00:32,494 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 68.3ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:32,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2021-04-15 02:00:32,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 477. [2021-04-15 02:00:32,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 3.323529411764706) internal successors, (1582), 476 states have internal predecessors, (1582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:32,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 1582 transitions. [2021-04-15 02:00:32,502 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 1582 transitions. Word has length 21 [2021-04-15 02:00:32,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:32,502 INFO L480 AbstractCegarLoop]: Abstraction has 477 states and 1582 transitions. [2021-04-15 02:00:32,502 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:32,502 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 1582 transitions. [2021-04-15 02:00:32,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:32,503 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:32,503 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:32,503 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2021-04-15 02:00:32,503 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:32,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:32,503 INFO L82 PathProgramCache]: Analyzing trace with hash 150041956, now seen corresponding path program 78 times [2021-04-15 02:00:32,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:32,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656848637] [2021-04-15 02:00:32,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:32,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:32,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:32,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656848637] [2021-04-15 02:00:32,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:32,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:32,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60921450] [2021-04-15 02:00:32,576 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:32,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:32,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:32,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:32,576 INFO L87 Difference]: Start difference. First operand 477 states and 1582 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:32,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:32,606 INFO L93 Difference]: Finished difference Result 986 states and 3055 transitions. [2021-04-15 02:00:32,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:32,607 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:32,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:32,608 INFO L225 Difference]: With dead ends: 986 [2021-04-15 02:00:32,608 INFO L226 Difference]: Without dead ends: 824 [2021-04-15 02:00:32,608 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 68.8ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:32,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2021-04-15 02:00:32,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 449. [2021-04-15 02:00:32,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 3.34375) internal successors, (1498), 448 states have internal predecessors, (1498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:32,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 1498 transitions. [2021-04-15 02:00:32,616 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 1498 transitions. Word has length 21 [2021-04-15 02:00:32,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:32,616 INFO L480 AbstractCegarLoop]: Abstraction has 449 states and 1498 transitions. [2021-04-15 02:00:32,616 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:32,616 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 1498 transitions. [2021-04-15 02:00:32,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:32,617 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:32,617 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:32,617 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2021-04-15 02:00:32,617 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:32,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:32,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1048980186, now seen corresponding path program 79 times [2021-04-15 02:00:32,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:32,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188133228] [2021-04-15 02:00:32,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:32,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:32,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:32,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188133228] [2021-04-15 02:00:32,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:32,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:32,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855692017] [2021-04-15 02:00:32,677 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:32,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:32,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:32,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:32,678 INFO L87 Difference]: Start difference. First operand 449 states and 1498 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:32,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:32,729 INFO L93 Difference]: Finished difference Result 960 states and 2997 transitions. [2021-04-15 02:00:32,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:32,729 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:32,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:32,730 INFO L225 Difference]: With dead ends: 960 [2021-04-15 02:00:32,730 INFO L226 Difference]: Without dead ends: 857 [2021-04-15 02:00:32,731 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 71.2ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:32,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2021-04-15 02:00:32,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 461. [2021-04-15 02:00:32,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 3.3347826086956522) internal successors, (1534), 460 states have internal predecessors, (1534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:32,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 1534 transitions. [2021-04-15 02:00:32,739 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 1534 transitions. Word has length 21 [2021-04-15 02:00:32,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:32,739 INFO L480 AbstractCegarLoop]: Abstraction has 461 states and 1534 transitions. [2021-04-15 02:00:32,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:32,739 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 1534 transitions. [2021-04-15 02:00:32,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:32,740 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:32,740 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:32,740 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2021-04-15 02:00:32,740 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:32,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:32,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1297089316, now seen corresponding path program 80 times [2021-04-15 02:00:32,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:32,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640973508] [2021-04-15 02:00:32,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:32,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:32,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:32,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640973508] [2021-04-15 02:00:32,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:32,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:32,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423952859] [2021-04-15 02:00:32,795 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:32,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:32,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:32,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:32,795 INFO L87 Difference]: Start difference. First operand 461 states and 1534 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:32,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:32,825 INFO L93 Difference]: Finished difference Result 960 states and 2989 transitions. [2021-04-15 02:00:32,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:32,826 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:32,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:32,827 INFO L225 Difference]: With dead ends: 960 [2021-04-15 02:00:32,827 INFO L226 Difference]: Without dead ends: 849 [2021-04-15 02:00:32,827 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 56.8ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:32,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2021-04-15 02:00:32,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 453. [2021-04-15 02:00:32,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 452 states have (on average 3.34070796460177) internal successors, (1510), 452 states have internal predecessors, (1510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:32,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 1510 transitions. [2021-04-15 02:00:32,835 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 1510 transitions. Word has length 21 [2021-04-15 02:00:32,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:32,835 INFO L480 AbstractCegarLoop]: Abstraction has 453 states and 1510 transitions. [2021-04-15 02:00:32,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:32,836 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 1510 transitions. [2021-04-15 02:00:32,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:32,836 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:32,836 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:32,836 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2021-04-15 02:00:32,836 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:32,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:32,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1604768474, now seen corresponding path program 81 times [2021-04-15 02:00:32,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:32,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367899563] [2021-04-15 02:00:32,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:32,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:32,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:32,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367899563] [2021-04-15 02:00:32,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:32,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:32,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752761829] [2021-04-15 02:00:32,892 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:32,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:32,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:32,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:32,892 INFO L87 Difference]: Start difference. First operand 453 states and 1510 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:32,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:32,932 INFO L93 Difference]: Finished difference Result 952 states and 2977 transitions. [2021-04-15 02:00:32,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:32,933 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:32,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:32,934 INFO L225 Difference]: With dead ends: 952 [2021-04-15 02:00:32,934 INFO L226 Difference]: Without dead ends: 849 [2021-04-15 02:00:32,934 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 67.1ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:32,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2021-04-15 02:00:32,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 465. [2021-04-15 02:00:32,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 3.3232758620689653) internal successors, (1542), 464 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:32,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 1542 transitions. [2021-04-15 02:00:32,942 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 1542 transitions. Word has length 21 [2021-04-15 02:00:32,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:32,942 INFO L480 AbstractCegarLoop]: Abstraction has 465 states and 1542 transitions. [2021-04-15 02:00:32,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:32,942 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 1542 transitions. [2021-04-15 02:00:32,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:32,943 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:32,943 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:32,943 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2021-04-15 02:00:32,944 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:32,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:32,944 INFO L82 PathProgramCache]: Analyzing trace with hash -569482052, now seen corresponding path program 82 times [2021-04-15 02:00:32,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:32,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142827188] [2021-04-15 02:00:32,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:32,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:32,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:32,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142827188] [2021-04-15 02:00:32,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:32,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:32,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040826530] [2021-04-15 02:00:32,998 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:32,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:32,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:32,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:32,998 INFO L87 Difference]: Start difference. First operand 465 states and 1542 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:33,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:33,040 INFO L93 Difference]: Finished difference Result 884 states and 2792 transitions. [2021-04-15 02:00:33,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:33,040 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:33,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:33,041 INFO L225 Difference]: With dead ends: 884 [2021-04-15 02:00:33,041 INFO L226 Difference]: Without dead ends: 757 [2021-04-15 02:00:33,041 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 65.3ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:33,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2021-04-15 02:00:33,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 453. [2021-04-15 02:00:33,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 452 states have (on average 3.331858407079646) internal successors, (1506), 452 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:33,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 1506 transitions. [2021-04-15 02:00:33,050 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 1506 transitions. Word has length 21 [2021-04-15 02:00:33,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:33,050 INFO L480 AbstractCegarLoop]: Abstraction has 453 states and 1506 transitions. [2021-04-15 02:00:33,050 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:33,051 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 1506 transitions. [2021-04-15 02:00:33,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:33,051 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:33,052 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:33,052 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2021-04-15 02:00:33,052 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:33,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:33,053 INFO L82 PathProgramCache]: Analyzing trace with hash -751892188, now seen corresponding path program 83 times [2021-04-15 02:00:33,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:33,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112130326] [2021-04-15 02:00:33,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:33,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:33,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:33,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112130326] [2021-04-15 02:00:33,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:33,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:33,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376430998] [2021-04-15 02:00:33,119 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:33,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:33,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:33,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:33,119 INFO L87 Difference]: Start difference. First operand 453 states and 1506 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:33,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:33,164 INFO L93 Difference]: Finished difference Result 952 states and 2973 transitions. [2021-04-15 02:00:33,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:33,164 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:33,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:33,165 INFO L225 Difference]: With dead ends: 952 [2021-04-15 02:00:33,165 INFO L226 Difference]: Without dead ends: 849 [2021-04-15 02:00:33,165 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 61.2ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:33,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2021-04-15 02:00:33,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 465. [2021-04-15 02:00:33,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 3.314655172413793) internal successors, (1538), 464 states have internal predecessors, (1538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:33,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 1538 transitions. [2021-04-15 02:00:33,173 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 1538 transitions. Word has length 21 [2021-04-15 02:00:33,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:33,174 INFO L480 AbstractCegarLoop]: Abstraction has 465 states and 1538 transitions. [2021-04-15 02:00:33,174 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:33,174 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 1538 transitions. [2021-04-15 02:00:33,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:33,174 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:33,174 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:33,174 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2021-04-15 02:00:33,175 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:33,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:33,175 INFO L82 PathProgramCache]: Analyzing trace with hash 1995152774, now seen corresponding path program 84 times [2021-04-15 02:00:33,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:33,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128449934] [2021-04-15 02:00:33,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:33,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:33,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:33,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128449934] [2021-04-15 02:00:33,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:33,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:33,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807481861] [2021-04-15 02:00:33,238 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:33,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:33,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:33,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:33,239 INFO L87 Difference]: Start difference. First operand 465 states and 1538 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:33,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:33,280 INFO L93 Difference]: Finished difference Result 884 states and 2788 transitions. [2021-04-15 02:00:33,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:33,280 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:33,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:33,281 INFO L225 Difference]: With dead ends: 884 [2021-04-15 02:00:33,281 INFO L226 Difference]: Without dead ends: 753 [2021-04-15 02:00:33,281 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 73.8ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:33,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2021-04-15 02:00:33,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 449. [2021-04-15 02:00:33,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 3.3392857142857144) internal successors, (1496), 448 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) [2021-04-15 02:00:33,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 1496 transitions. [2021-04-15 02:00:33,289 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 1496 transitions. Word has length 21 [2021-04-15 02:00:33,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:33,289 INFO L480 AbstractCegarLoop]: Abstraction has 449 states and 1496 transitions. [2021-04-15 02:00:33,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:33,289 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 1496 transitions. [2021-04-15 02:00:33,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:33,290 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:33,290 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:33,290 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2021-04-15 02:00:33,290 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:33,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:33,290 INFO L82 PathProgramCache]: Analyzing trace with hash 2031327800, now seen corresponding path program 85 times [2021-04-15 02:00:33,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:33,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291750730] [2021-04-15 02:00:33,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:33,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:33,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:33,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291750730] [2021-04-15 02:00:33,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:33,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:33,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137979295] [2021-04-15 02:00:33,350 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:33,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:33,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:33,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:33,351 INFO L87 Difference]: Start difference. First operand 449 states and 1496 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:33,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:33,396 INFO L93 Difference]: Finished difference Result 943 states and 2930 transitions. [2021-04-15 02:00:33,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:33,397 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:33,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:33,398 INFO L225 Difference]: With dead ends: 943 [2021-04-15 02:00:33,398 INFO L226 Difference]: Without dead ends: 840 [2021-04-15 02:00:33,398 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 71.2ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:33,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2021-04-15 02:00:33,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 449. [2021-04-15 02:00:33,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 3.3125) internal successors, (1484), 448 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:33,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 1484 transitions. [2021-04-15 02:00:33,406 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 1484 transitions. Word has length 21 [2021-04-15 02:00:33,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:33,406 INFO L480 AbstractCegarLoop]: Abstraction has 449 states and 1484 transitions. [2021-04-15 02:00:33,406 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:33,407 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 1484 transitions. [2021-04-15 02:00:33,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:33,407 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:33,407 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:33,407 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2021-04-15 02:00:33,407 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:33,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:33,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1172323610, now seen corresponding path program 86 times [2021-04-15 02:00:33,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:33,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336679228] [2021-04-15 02:00:33,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:33,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:33,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:33,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336679228] [2021-04-15 02:00:33,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:33,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:33,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982965781] [2021-04-15 02:00:33,473 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:33,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:33,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:33,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:33,473 INFO L87 Difference]: Start difference. First operand 449 states and 1484 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:33,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:33,506 INFO L93 Difference]: Finished difference Result 974 states and 3017 transitions. [2021-04-15 02:00:33,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:33,506 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:33,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:33,508 INFO L225 Difference]: With dead ends: 974 [2021-04-15 02:00:33,508 INFO L226 Difference]: Without dead ends: 820 [2021-04-15 02:00:33,508 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 65.5ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:33,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2021-04-15 02:00:33,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 429. [2021-04-15 02:00:33,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 3.303738317757009) internal successors, (1414), 428 states have internal predecessors, (1414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:33,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1414 transitions. [2021-04-15 02:00:33,516 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1414 transitions. Word has length 21 [2021-04-15 02:00:33,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:33,516 INFO L480 AbstractCegarLoop]: Abstraction has 429 states and 1414 transitions. [2021-04-15 02:00:33,516 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:33,516 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1414 transitions. [2021-04-15 02:00:33,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:33,517 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:33,517 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:33,517 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2021-04-15 02:00:33,517 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:33,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:33,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1824519834, now seen corresponding path program 87 times [2021-04-15 02:00:33,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:33,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073225406] [2021-04-15 02:00:33,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:33,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:33,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:33,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073225406] [2021-04-15 02:00:33,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:33,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:33,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061029088] [2021-04-15 02:00:33,573 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:33,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:33,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:33,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:33,573 INFO L87 Difference]: Start difference. First operand 429 states and 1414 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:33,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:33,613 INFO L93 Difference]: Finished difference Result 892 states and 2761 transitions. [2021-04-15 02:00:33,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:33,614 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:33,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:33,615 INFO L225 Difference]: With dead ends: 892 [2021-04-15 02:00:33,615 INFO L226 Difference]: Without dead ends: 789 [2021-04-15 02:00:33,615 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 65.5ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:33,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2021-04-15 02:00:33,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 441. [2021-04-15 02:00:33,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 440 states have (on average 3.286363636363636) internal successors, (1446), 440 states have internal predecessors, (1446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:33,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 1446 transitions. [2021-04-15 02:00:33,622 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 1446 transitions. Word has length 21 [2021-04-15 02:00:33,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:33,622 INFO L480 AbstractCegarLoop]: Abstraction has 441 states and 1446 transitions. [2021-04-15 02:00:33,622 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:33,622 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 1446 transitions. [2021-04-15 02:00:33,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:33,623 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:33,623 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:33,623 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2021-04-15 02:00:33,623 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:33,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:33,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1416279014, now seen corresponding path program 88 times [2021-04-15 02:00:33,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:33,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385673605] [2021-04-15 02:00:33,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:33,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:33,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:33,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385673605] [2021-04-15 02:00:33,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:33,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:33,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596584092] [2021-04-15 02:00:33,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:33,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:33,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:33,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:33,675 INFO L87 Difference]: Start difference. First operand 441 states and 1446 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:33,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:33,714 INFO L93 Difference]: Finished difference Result 824 states and 2576 transitions. [2021-04-15 02:00:33,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:33,715 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:33,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:33,716 INFO L225 Difference]: With dead ends: 824 [2021-04-15 02:00:33,716 INFO L226 Difference]: Without dead ends: 697 [2021-04-15 02:00:33,716 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 63.2ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:33,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2021-04-15 02:00:33,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 429. [2021-04-15 02:00:33,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 3.289719626168224) internal successors, (1408), 428 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:33,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1408 transitions. [2021-04-15 02:00:33,723 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1408 transitions. Word has length 21 [2021-04-15 02:00:33,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:33,723 INFO L480 AbstractCegarLoop]: Abstraction has 429 states and 1408 transitions. [2021-04-15 02:00:33,723 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:33,723 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1408 transitions. [2021-04-15 02:00:33,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:33,724 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:33,724 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:33,724 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2021-04-15 02:00:33,724 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:33,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:33,724 INFO L82 PathProgramCache]: Analyzing trace with hash -928326020, now seen corresponding path program 89 times [2021-04-15 02:00:33,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:33,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481335696] [2021-04-15 02:00:33,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:33,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:33,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:33,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481335696] [2021-04-15 02:00:33,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:33,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:33,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538776210] [2021-04-15 02:00:33,773 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:33,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:33,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:33,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:33,773 INFO L87 Difference]: Start difference. First operand 429 states and 1408 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:33,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:33,805 INFO L93 Difference]: Finished difference Result 937 states and 2907 transitions. [2021-04-15 02:00:33,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:33,805 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:33,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:33,806 INFO L225 Difference]: With dead ends: 937 [2021-04-15 02:00:33,806 INFO L226 Difference]: Without dead ends: 803 [2021-04-15 02:00:33,806 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 52.1ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:33,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2021-04-15 02:00:33,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 455. [2021-04-15 02:00:33,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 454 states have (on average 3.2577092511013217) internal successors, (1479), 454 states have internal predecessors, (1479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:33,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 1479 transitions. [2021-04-15 02:00:33,814 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 1479 transitions. Word has length 21 [2021-04-15 02:00:33,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:33,814 INFO L480 AbstractCegarLoop]: Abstraction has 455 states and 1479 transitions. [2021-04-15 02:00:33,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:33,814 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 1479 transitions. [2021-04-15 02:00:33,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:33,815 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:33,815 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:33,815 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2021-04-15 02:00:33,815 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:33,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:33,815 INFO L82 PathProgramCache]: Analyzing trace with hash -840389286, now seen corresponding path program 90 times [2021-04-15 02:00:33,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:33,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947423006] [2021-04-15 02:00:33,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:33,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:33,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:33,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947423006] [2021-04-15 02:00:33,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:33,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:33,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118764317] [2021-04-15 02:00:33,865 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:33,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:33,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:33,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:33,865 INFO L87 Difference]: Start difference. First operand 455 states and 1479 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:33,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:33,907 INFO L93 Difference]: Finished difference Result 838 states and 2609 transitions. [2021-04-15 02:00:33,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:33,908 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:33,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:33,909 INFO L225 Difference]: With dead ends: 838 [2021-04-15 02:00:33,909 INFO L226 Difference]: Without dead ends: 687 [2021-04-15 02:00:33,909 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 60.7ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:33,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2021-04-15 02:00:33,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 419. [2021-04-15 02:00:33,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 3.299043062200957) internal successors, (1379), 418 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:33,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 1379 transitions. [2021-04-15 02:00:33,916 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 1379 transitions. Word has length 21 [2021-04-15 02:00:33,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:33,916 INFO L480 AbstractCegarLoop]: Abstraction has 419 states and 1379 transitions. [2021-04-15 02:00:33,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:33,916 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 1379 transitions. [2021-04-15 02:00:33,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:33,916 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:33,916 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:33,917 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2021-04-15 02:00:33,917 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:33,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:33,917 INFO L82 PathProgramCache]: Analyzing trace with hash 456830594, now seen corresponding path program 91 times [2021-04-15 02:00:33,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:33,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594747683] [2021-04-15 02:00:33,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:33,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:33,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:33,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594747683] [2021-04-15 02:00:33,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:33,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:33,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344862069] [2021-04-15 02:00:33,972 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:33,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:33,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:33,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:33,973 INFO L87 Difference]: Start difference. First operand 419 states and 1379 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:34,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:34,003 INFO L93 Difference]: Finished difference Result 858 states and 2638 transitions. [2021-04-15 02:00:34,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:34,003 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:34,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:34,004 INFO L225 Difference]: With dead ends: 858 [2021-04-15 02:00:34,004 INFO L226 Difference]: Without dead ends: 755 [2021-04-15 02:00:34,005 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 57.2ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:34,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2021-04-15 02:00:34,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 419. [2021-04-15 02:00:34,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 3.270334928229665) internal successors, (1367), 418 states have internal predecessors, (1367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:34,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 1367 transitions. [2021-04-15 02:00:34,012 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 1367 transitions. Word has length 21 [2021-04-15 02:00:34,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:34,012 INFO L480 AbstractCegarLoop]: Abstraction has 419 states and 1367 transitions. [2021-04-15 02:00:34,012 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:34,012 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 1367 transitions. [2021-04-15 02:00:34,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:34,012 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:34,012 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:34,013 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2021-04-15 02:00:34,013 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:34,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:34,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1133104156, now seen corresponding path program 92 times [2021-04-15 02:00:34,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:34,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695858941] [2021-04-15 02:00:34,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:34,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:34,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:34,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695858941] [2021-04-15 02:00:34,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:34,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:34,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483726667] [2021-04-15 02:00:34,069 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:34,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:34,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:34,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:34,070 INFO L87 Difference]: Start difference. First operand 419 states and 1367 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:34,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:34,105 INFO L93 Difference]: Finished difference Result 889 states and 2725 transitions. [2021-04-15 02:00:34,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:34,105 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:34,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:34,106 INFO L225 Difference]: With dead ends: 889 [2021-04-15 02:00:34,107 INFO L226 Difference]: Without dead ends: 735 [2021-04-15 02:00:34,107 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 60.7ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:34,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2021-04-15 02:00:34,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 399. [2021-04-15 02:00:34,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 3.258793969849246) internal successors, (1297), 398 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:34,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 1297 transitions. [2021-04-15 02:00:34,114 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 1297 transitions. Word has length 21 [2021-04-15 02:00:34,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:34,114 INFO L480 AbstractCegarLoop]: Abstraction has 399 states and 1297 transitions. [2021-04-15 02:00:34,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:34,114 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 1297 transitions. [2021-04-15 02:00:34,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:34,115 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:34,115 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:34,115 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2021-04-15 02:00:34,115 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:34,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:34,115 INFO L82 PathProgramCache]: Analyzing trace with hash 250022628, now seen corresponding path program 93 times [2021-04-15 02:00:34,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:34,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800921995] [2021-04-15 02:00:34,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:34,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:34,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:34,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800921995] [2021-04-15 02:00:34,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:34,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:34,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395247721] [2021-04-15 02:00:34,176 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:34,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:34,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:34,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:34,177 INFO L87 Difference]: Start difference. First operand 399 states and 1297 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:34,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:34,209 INFO L93 Difference]: Finished difference Result 862 states and 2644 transitions. [2021-04-15 02:00:34,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:34,209 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:34,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:34,210 INFO L225 Difference]: With dead ends: 862 [2021-04-15 02:00:34,210 INFO L226 Difference]: Without dead ends: 759 [2021-04-15 02:00:34,211 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 53.2ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:34,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2021-04-15 02:00:34,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 411. [2021-04-15 02:00:34,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 3.2414634146341466) internal successors, (1329), 410 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:34,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 1329 transitions. [2021-04-15 02:00:34,217 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 1329 transitions. Word has length 21 [2021-04-15 02:00:34,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:34,218 INFO L480 AbstractCegarLoop]: Abstraction has 411 states and 1329 transitions. [2021-04-15 02:00:34,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:34,218 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 1329 transitions. [2021-04-15 02:00:34,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:34,218 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:34,218 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:34,218 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2021-04-15 02:00:34,218 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:34,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:34,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1930519268, now seen corresponding path program 94 times [2021-04-15 02:00:34,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:34,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209544366] [2021-04-15 02:00:34,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:34,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:34,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:34,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209544366] [2021-04-15 02:00:34,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:34,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:34,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533349153] [2021-04-15 02:00:34,269 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:34,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:34,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:34,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:34,270 INFO L87 Difference]: Start difference. First operand 411 states and 1329 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:34,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:34,309 INFO L93 Difference]: Finished difference Result 794 states and 2459 transitions. [2021-04-15 02:00:34,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:34,309 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:34,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:34,311 INFO L225 Difference]: With dead ends: 794 [2021-04-15 02:00:34,311 INFO L226 Difference]: Without dead ends: 667 [2021-04-15 02:00:34,311 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 62.5ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:34,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2021-04-15 02:00:34,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 399. [2021-04-15 02:00:34,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 3.2437185929648242) internal successors, (1291), 398 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:34,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 1291 transitions. [2021-04-15 02:00:34,318 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 1291 transitions. Word has length 21 [2021-04-15 02:00:34,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:34,318 INFO L480 AbstractCegarLoop]: Abstraction has 399 states and 1291 transitions. [2021-04-15 02:00:34,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:34,318 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 1291 transitions. [2021-04-15 02:00:34,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:34,320 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:34,320 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:34,320 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2021-04-15 02:00:34,320 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:34,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:34,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1667184582, now seen corresponding path program 95 times [2021-04-15 02:00:34,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:34,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723847946] [2021-04-15 02:00:34,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:34,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:34,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:34,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723847946] [2021-04-15 02:00:34,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:34,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:34,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103351480] [2021-04-15 02:00:34,372 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:34,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:34,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:34,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:34,372 INFO L87 Difference]: Start difference. First operand 399 states and 1291 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:34,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:34,407 INFO L93 Difference]: Finished difference Result 826 states and 2518 transitions. [2021-04-15 02:00:34,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:34,407 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:34,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:34,408 INFO L225 Difference]: With dead ends: 826 [2021-04-15 02:00:34,408 INFO L226 Difference]: Without dead ends: 692 [2021-04-15 02:00:34,408 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 58.8ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:34,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2021-04-15 02:00:34,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 344. [2021-04-15 02:00:34,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 3.1778425655976674) internal successors, (1090), 343 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:34,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1090 transitions. [2021-04-15 02:00:34,415 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1090 transitions. Word has length 21 [2021-04-15 02:00:34,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:34,415 INFO L480 AbstractCegarLoop]: Abstraction has 344 states and 1090 transitions. [2021-04-15 02:00:34,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:34,415 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1090 transitions. [2021-04-15 02:00:34,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:34,415 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:34,415 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:34,415 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2021-04-15 02:00:34,416 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:34,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:34,416 INFO L82 PathProgramCache]: Analyzing trace with hash 275040036, now seen corresponding path program 96 times [2021-04-15 02:00:34,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:34,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546571579] [2021-04-15 02:00:34,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:34,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:34,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:34,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546571579] [2021-04-15 02:00:34,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:34,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:34,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318567591] [2021-04-15 02:00:34,466 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:34,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:34,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:34,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:34,467 INFO L87 Difference]: Start difference. First operand 344 states and 1090 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:34,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:34,508 INFO L93 Difference]: Finished difference Result 727 states and 2220 transitions. [2021-04-15 02:00:34,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:34,509 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:34,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:34,509 INFO L225 Difference]: With dead ends: 727 [2021-04-15 02:00:34,510 INFO L226 Difference]: Without dead ends: 572 [2021-04-15 02:00:34,510 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 62.1ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:34,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-04-15 02:00:34,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 304. [2021-04-15 02:00:34,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 3.2475247524752477) internal successors, (984), 303 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:34,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 984 transitions. [2021-04-15 02:00:34,515 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 984 transitions. Word has length 21 [2021-04-15 02:00:34,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:34,515 INFO L480 AbstractCegarLoop]: Abstraction has 304 states and 984 transitions. [2021-04-15 02:00:34,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:34,515 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 984 transitions. [2021-04-15 02:00:34,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:34,517 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:34,517 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:34,517 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2021-04-15 02:00:34,517 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:34,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:34,517 INFO L82 PathProgramCache]: Analyzing trace with hash 988259000, now seen corresponding path program 97 times [2021-04-15 02:00:34,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:34,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698779938] [2021-04-15 02:00:34,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:34,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:34,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:34,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698779938] [2021-04-15 02:00:34,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:34,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:34,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725099032] [2021-04-15 02:00:34,579 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:34,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:34,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:34,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:34,579 INFO L87 Difference]: Start difference. First operand 304 states and 984 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:34,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:34,635 INFO L93 Difference]: Finished difference Result 623 states and 1890 transitions. [2021-04-15 02:00:34,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:34,636 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:34,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:34,637 INFO L225 Difference]: With dead ends: 623 [2021-04-15 02:00:34,637 INFO L226 Difference]: Without dead ends: 520 [2021-04-15 02:00:34,637 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 88.4ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:34,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-04-15 02:00:34,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 312. [2021-04-15 02:00:34,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 3.2282958199356915) internal successors, (1004), 311 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:34,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 1004 transitions. [2021-04-15 02:00:34,642 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 1004 transitions. Word has length 21 [2021-04-15 02:00:34,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:34,642 INFO L480 AbstractCegarLoop]: Abstraction has 312 states and 1004 transitions. [2021-04-15 02:00:34,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:34,642 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 1004 transitions. [2021-04-15 02:00:34,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:34,642 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:34,642 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:34,643 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2021-04-15 02:00:34,643 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:34,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:34,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1236368130, now seen corresponding path program 98 times [2021-04-15 02:00:34,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:34,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520390412] [2021-04-15 02:00:34,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:34,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:34,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:34,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520390412] [2021-04-15 02:00:34,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:34,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:34,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326218699] [2021-04-15 02:00:34,699 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:34,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:34,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:34,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:34,699 INFO L87 Difference]: Start difference. First operand 312 states and 1004 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:34,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:34,728 INFO L93 Difference]: Finished difference Result 623 states and 1882 transitions. [2021-04-15 02:00:34,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:34,728 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:34,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:34,729 INFO L225 Difference]: With dead ends: 623 [2021-04-15 02:00:34,729 INFO L226 Difference]: Without dead ends: 512 [2021-04-15 02:00:34,729 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 58.4ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:34,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-04-15 02:00:34,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 304. [2021-04-15 02:00:34,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 3.2343234323432344) internal successors, (980), 303 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:34,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 980 transitions. [2021-04-15 02:00:34,734 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 980 transitions. Word has length 21 [2021-04-15 02:00:34,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:34,734 INFO L480 AbstractCegarLoop]: Abstraction has 304 states and 980 transitions. [2021-04-15 02:00:34,734 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:34,734 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 980 transitions. [2021-04-15 02:00:34,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:34,735 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:34,735 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:34,735 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2021-04-15 02:00:34,735 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:34,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:34,735 INFO L82 PathProgramCache]: Analyzing trace with hash -2114241864, now seen corresponding path program 99 times [2021-04-15 02:00:34,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:34,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659187511] [2021-04-15 02:00:34,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:34,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:34,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:34,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659187511] [2021-04-15 02:00:34,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:34,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:34,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078587654] [2021-04-15 02:00:34,788 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:34,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:34,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:34,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:34,788 INFO L87 Difference]: Start difference. First operand 304 states and 980 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:34,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:34,828 INFO L93 Difference]: Finished difference Result 641 states and 1951 transitions. [2021-04-15 02:00:34,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:34,828 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:34,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:34,829 INFO L225 Difference]: With dead ends: 641 [2021-04-15 02:00:34,829 INFO L226 Difference]: Without dead ends: 538 [2021-04-15 02:00:34,829 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 65.5ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:34,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-04-15 02:00:34,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 316. [2021-04-15 02:00:34,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 3.212698412698413) internal successors, (1012), 315 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:34,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 1012 transitions. [2021-04-15 02:00:34,834 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 1012 transitions. Word has length 21 [2021-04-15 02:00:34,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:34,834 INFO L480 AbstractCegarLoop]: Abstraction has 316 states and 1012 transitions. [2021-04-15 02:00:34,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:34,834 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 1012 transitions. [2021-04-15 02:00:34,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:34,835 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:34,835 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:34,835 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2021-04-15 02:00:34,835 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:34,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:34,835 INFO L82 PathProgramCache]: Analyzing trace with hash 664098074, now seen corresponding path program 100 times [2021-04-15 02:00:34,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:34,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603068963] [2021-04-15 02:00:34,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:34,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:34,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:34,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603068963] [2021-04-15 02:00:34,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:34,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:34,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755759963] [2021-04-15 02:00:34,887 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:34,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:34,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:34,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:34,887 INFO L87 Difference]: Start difference. First operand 316 states and 1012 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:34,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:34,933 INFO L93 Difference]: Finished difference Result 655 states and 1988 transitions. [2021-04-15 02:00:34,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:34,933 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:34,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:34,934 INFO L225 Difference]: With dead ends: 655 [2021-04-15 02:00:34,934 INFO L226 Difference]: Without dead ends: 526 [2021-04-15 02:00:34,934 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 69.6ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:34,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-04-15 02:00:34,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 304. [2021-04-15 02:00:34,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 3.221122112211221) internal successors, (976), 303 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:34,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 976 transitions. [2021-04-15 02:00:34,939 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 976 transitions. Word has length 21 [2021-04-15 02:00:34,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:34,939 INFO L480 AbstractCegarLoop]: Abstraction has 304 states and 976 transitions. [2021-04-15 02:00:34,939 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:34,939 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 976 transitions. [2021-04-15 02:00:34,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:34,939 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:34,939 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:34,939 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2021-04-15 02:00:34,940 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:34,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:34,940 INFO L82 PathProgramCache]: Analyzing trace with hash -175935230, now seen corresponding path program 101 times [2021-04-15 02:00:34,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:34,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010663688] [2021-04-15 02:00:34,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:34,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:35,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:35,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010663688] [2021-04-15 02:00:35,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:35,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:35,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254635541] [2021-04-15 02:00:35,000 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:35,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:35,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:35,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:35,001 INFO L87 Difference]: Start difference. First operand 304 states and 976 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:35,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:35,035 INFO L93 Difference]: Finished difference Result 641 states and 1947 transitions. [2021-04-15 02:00:35,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:35,035 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:35,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:35,036 INFO L225 Difference]: With dead ends: 641 [2021-04-15 02:00:35,036 INFO L226 Difference]: Without dead ends: 538 [2021-04-15 02:00:35,036 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 63.1ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:35,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-04-15 02:00:35,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 316. [2021-04-15 02:00:35,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 3.2) internal successors, (1008), 315 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:35,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 1008 transitions. [2021-04-15 02:00:35,041 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 1008 transitions. Word has length 21 [2021-04-15 02:00:35,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:35,041 INFO L480 AbstractCegarLoop]: Abstraction has 316 states and 1008 transitions. [2021-04-15 02:00:35,041 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:35,041 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 1008 transitions. [2021-04-15 02:00:35,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:35,042 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:35,042 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:35,042 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2021-04-15 02:00:35,042 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:35,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:35,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1744863772, now seen corresponding path program 102 times [2021-04-15 02:00:35,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:35,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739624161] [2021-04-15 02:00:35,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:35,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:35,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:35,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739624161] [2021-04-15 02:00:35,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:35,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:35,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375264151] [2021-04-15 02:00:35,098 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:35,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:35,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:35,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:35,098 INFO L87 Difference]: Start difference. First operand 316 states and 1008 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:35,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:35,137 INFO L93 Difference]: Finished difference Result 655 states and 1984 transitions. [2021-04-15 02:00:35,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:35,137 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:35,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:35,138 INFO L225 Difference]: With dead ends: 655 [2021-04-15 02:00:35,138 INFO L226 Difference]: Without dead ends: 522 [2021-04-15 02:00:35,138 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 70.1ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:35,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2021-04-15 02:00:35,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 300. [2021-04-15 02:00:35,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 3.230769230769231) internal successors, (966), 299 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:35,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 966 transitions. [2021-04-15 02:00:35,143 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 966 transitions. Word has length 21 [2021-04-15 02:00:35,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:35,143 INFO L480 AbstractCegarLoop]: Abstraction has 300 states and 966 transitions. [2021-04-15 02:00:35,143 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:35,143 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 966 transitions. [2021-04-15 02:00:35,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:35,144 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:35,144 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:35,144 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2021-04-15 02:00:35,144 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:35,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:35,144 INFO L82 PathProgramCache]: Analyzing trace with hash 507356954, now seen corresponding path program 103 times [2021-04-15 02:00:35,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:35,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911649591] [2021-04-15 02:00:35,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:35,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:35,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:35,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911649591] [2021-04-15 02:00:35,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:35,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:35,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908695723] [2021-04-15 02:00:35,198 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:35,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:35,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:35,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:35,198 INFO L87 Difference]: Start difference. First operand 300 states and 966 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:35,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:35,243 INFO L93 Difference]: Finished difference Result 611 states and 1844 transitions. [2021-04-15 02:00:35,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:35,244 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:35,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:35,244 INFO L225 Difference]: With dead ends: 611 [2021-04-15 02:00:35,244 INFO L226 Difference]: Without dead ends: 508 [2021-04-15 02:00:35,244 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 65.1ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:35,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-04-15 02:00:35,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 300. [2021-04-15 02:00:35,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 3.2040133779264215) internal successors, (958), 299 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:35,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 958 transitions. [2021-04-15 02:00:35,249 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 958 transitions. Word has length 21 [2021-04-15 02:00:35,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:35,249 INFO L480 AbstractCegarLoop]: Abstraction has 300 states and 958 transitions. [2021-04-15 02:00:35,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:35,249 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 958 transitions. [2021-04-15 02:00:35,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:35,250 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:35,250 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:35,250 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2021-04-15 02:00:35,250 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:35,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:35,250 INFO L82 PathProgramCache]: Analyzing trace with hash 755466084, now seen corresponding path program 104 times [2021-04-15 02:00:35,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:35,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130059895] [2021-04-15 02:00:35,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:35,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:35,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:35,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130059895] [2021-04-15 02:00:35,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:35,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:35,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131007828] [2021-04-15 02:00:35,308 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:35,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:35,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:35,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:35,308 INFO L87 Difference]: Start difference. First operand 300 states and 958 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:35,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:35,340 INFO L93 Difference]: Finished difference Result 611 states and 1836 transitions. [2021-04-15 02:00:35,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:35,340 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:35,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:35,341 INFO L225 Difference]: With dead ends: 611 [2021-04-15 02:00:35,341 INFO L226 Difference]: Without dead ends: 500 [2021-04-15 02:00:35,341 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 59.2ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:35,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-04-15 02:00:35,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 292. [2021-04-15 02:00:35,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 3.209621993127148) internal successors, (934), 291 states have internal predecessors, (934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:35,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 934 transitions. [2021-04-15 02:00:35,346 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 934 transitions. Word has length 21 [2021-04-15 02:00:35,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:35,346 INFO L480 AbstractCegarLoop]: Abstraction has 292 states and 934 transitions. [2021-04-15 02:00:35,346 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:35,346 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 934 transitions. [2021-04-15 02:00:35,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:35,346 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:35,346 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:35,346 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2021-04-15 02:00:35,346 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:35,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:35,347 INFO L82 PathProgramCache]: Analyzing trace with hash -418293064, now seen corresponding path program 105 times [2021-04-15 02:00:35,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:35,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728387185] [2021-04-15 02:00:35,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:35,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:35,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:35,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728387185] [2021-04-15 02:00:35,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:35,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:35,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930559808] [2021-04-15 02:00:35,396 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:35,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:35,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:35,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:35,397 INFO L87 Difference]: Start difference. First operand 292 states and 934 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:35,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:35,437 INFO L93 Difference]: Finished difference Result 603 states and 1824 transitions. [2021-04-15 02:00:35,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:35,453 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:35,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:35,454 INFO L225 Difference]: With dead ends: 603 [2021-04-15 02:00:35,454 INFO L226 Difference]: Without dead ends: 500 [2021-04-15 02:00:35,454 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 65.5ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:35,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-04-15 02:00:35,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 304. [2021-04-15 02:00:35,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 3.1881188118811883) internal successors, (966), 303 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:35,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 966 transitions. [2021-04-15 02:00:35,460 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 966 transitions. Word has length 21 [2021-04-15 02:00:35,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:35,460 INFO L480 AbstractCegarLoop]: Abstraction has 304 states and 966 transitions. [2021-04-15 02:00:35,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:35,460 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 966 transitions. [2021-04-15 02:00:35,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:35,461 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:35,461 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:35,461 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2021-04-15 02:00:35,461 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:35,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:35,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1702423706, now seen corresponding path program 106 times [2021-04-15 02:00:35,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:35,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239574216] [2021-04-15 02:00:35,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:35,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:35,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:35,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239574216] [2021-04-15 02:00:35,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:35,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:35,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813125411] [2021-04-15 02:00:35,553 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:35,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:35,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:35,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:35,554 INFO L87 Difference]: Start difference. First operand 304 states and 966 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:35,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:35,592 INFO L93 Difference]: Finished difference Result 535 states and 1639 transitions. [2021-04-15 02:00:35,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:35,592 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:35,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:35,593 INFO L225 Difference]: With dead ends: 535 [2021-04-15 02:00:35,593 INFO L226 Difference]: Without dead ends: 408 [2021-04-15 02:00:35,593 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 98.7ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:35,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-04-15 02:00:35,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 292. [2021-04-15 02:00:35,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 3.195876288659794) internal successors, (930), 291 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:35,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 930 transitions. [2021-04-15 02:00:35,597 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 930 transitions. Word has length 21 [2021-04-15 02:00:35,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:35,597 INFO L480 AbstractCegarLoop]: Abstraction has 292 states and 930 transitions. [2021-04-15 02:00:35,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:35,597 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 930 transitions. [2021-04-15 02:00:35,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:35,598 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:35,598 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:35,598 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2021-04-15 02:00:35,598 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:35,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:35,598 INFO L82 PathProgramCache]: Analyzing trace with hash 1520013570, now seen corresponding path program 107 times [2021-04-15 02:00:35,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:35,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007210007] [2021-04-15 02:00:35,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:35,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:35,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:35,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007210007] [2021-04-15 02:00:35,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:35,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:35,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861336745] [2021-04-15 02:00:35,650 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:35,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:35,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:35,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:35,650 INFO L87 Difference]: Start difference. First operand 292 states and 930 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:35,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:35,677 INFO L93 Difference]: Finished difference Result 603 states and 1820 transitions. [2021-04-15 02:00:35,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:35,678 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:35,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:35,679 INFO L225 Difference]: With dead ends: 603 [2021-04-15 02:00:35,679 INFO L226 Difference]: Without dead ends: 500 [2021-04-15 02:00:35,679 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 53.3ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:35,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-04-15 02:00:35,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 304. [2021-04-15 02:00:35,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 3.174917491749175) internal successors, (962), 303 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:35,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 962 transitions. [2021-04-15 02:00:35,683 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 962 transitions. Word has length 21 [2021-04-15 02:00:35,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:35,684 INFO L480 AbstractCegarLoop]: Abstraction has 304 states and 962 transitions. [2021-04-15 02:00:35,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:35,684 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 962 transitions. [2021-04-15 02:00:35,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:35,684 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:35,684 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:35,684 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2021-04-15 02:00:35,684 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:35,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:35,684 INFO L82 PathProgramCache]: Analyzing trace with hash -27908764, now seen corresponding path program 108 times [2021-04-15 02:00:35,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:35,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424639387] [2021-04-15 02:00:35,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:35,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:35,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:35,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424639387] [2021-04-15 02:00:35,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:35,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:35,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288722910] [2021-04-15 02:00:35,735 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:35,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:35,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:35,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:35,736 INFO L87 Difference]: Start difference. First operand 304 states and 962 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:35,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:35,771 INFO L93 Difference]: Finished difference Result 535 states and 1635 transitions. [2021-04-15 02:00:35,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:35,771 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:35,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:35,772 INFO L225 Difference]: With dead ends: 535 [2021-04-15 02:00:35,772 INFO L226 Difference]: Without dead ends: 404 [2021-04-15 02:00:35,772 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 62.4ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:35,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-04-15 02:00:35,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 288. [2021-04-15 02:00:35,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 3.205574912891986) internal successors, (920), 287 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:35,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 920 transitions. [2021-04-15 02:00:35,776 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 920 transitions. Word has length 21 [2021-04-15 02:00:35,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:35,776 INFO L480 AbstractCegarLoop]: Abstraction has 288 states and 920 transitions. [2021-04-15 02:00:35,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:35,776 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 920 transitions. [2021-04-15 02:00:35,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:35,777 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:35,777 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:35,777 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2021-04-15 02:00:35,777 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:35,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:35,777 INFO L82 PathProgramCache]: Analyzing trace with hash -577641800, now seen corresponding path program 109 times [2021-04-15 02:00:35,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:35,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907072289] [2021-04-15 02:00:35,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:35,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:35,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:35,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907072289] [2021-04-15 02:00:35,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:35,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:35,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851123295] [2021-04-15 02:00:35,826 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:35,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:35,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:35,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:35,826 INFO L87 Difference]: Start difference. First operand 288 states and 920 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:35,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:35,864 INFO L93 Difference]: Finished difference Result 589 states and 1771 transitions. [2021-04-15 02:00:35,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:35,864 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:35,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:35,865 INFO L225 Difference]: With dead ends: 589 [2021-04-15 02:00:35,865 INFO L226 Difference]: Without dead ends: 486 [2021-04-15 02:00:35,865 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 62.9ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:35,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-04-15 02:00:35,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 288. [2021-04-15 02:00:35,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 3.163763066202091) internal successors, (908), 287 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:35,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 908 transitions. [2021-04-15 02:00:35,870 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 908 transitions. Word has length 21 [2021-04-15 02:00:35,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:35,870 INFO L480 AbstractCegarLoop]: Abstraction has 288 states and 908 transitions. [2021-04-15 02:00:35,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:35,870 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 908 transitions. [2021-04-15 02:00:35,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:35,870 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:35,870 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:35,870 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2021-04-15 02:00:35,870 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:35,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:35,871 INFO L82 PathProgramCache]: Analyzing trace with hash -2094269158, now seen corresponding path program 110 times [2021-04-15 02:00:35,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:35,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465247836] [2021-04-15 02:00:35,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:35,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:35,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:35,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465247836] [2021-04-15 02:00:35,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:35,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:35,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648532903] [2021-04-15 02:00:35,928 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:35,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:35,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:35,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:35,929 INFO L87 Difference]: Start difference. First operand 288 states and 908 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:35,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:35,971 INFO L93 Difference]: Finished difference Result 603 states and 1808 transitions. [2021-04-15 02:00:35,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:35,971 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:35,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:35,972 INFO L225 Difference]: With dead ends: 603 [2021-04-15 02:00:35,972 INFO L226 Difference]: Without dead ends: 474 [2021-04-15 02:00:35,972 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 66.8ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:35,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-04-15 02:00:35,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 276. [2021-04-15 02:00:35,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 3.1636363636363636) internal successors, (870), 275 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:35,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 870 transitions. [2021-04-15 02:00:35,982 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 870 transitions. Word has length 21 [2021-04-15 02:00:35,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:35,982 INFO L480 AbstractCegarLoop]: Abstraction has 276 states and 870 transitions. [2021-04-15 02:00:35,982 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:35,983 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 870 transitions. [2021-04-15 02:00:35,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:35,983 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:35,983 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:35,983 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2021-04-15 02:00:35,983 INFO L428 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:35,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:35,983 INFO L82 PathProgramCache]: Analyzing trace with hash 503420826, now seen corresponding path program 111 times [2021-04-15 02:00:35,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:35,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815220722] [2021-04-15 02:00:35,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:35,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:36,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:36,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815220722] [2021-04-15 02:00:36,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:36,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:36,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461274178] [2021-04-15 02:00:36,049 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:36,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:36,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:36,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:36,049 INFO L87 Difference]: Start difference. First operand 276 states and 870 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:36,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:36,097 INFO L93 Difference]: Finished difference Result 551 states and 1640 transitions. [2021-04-15 02:00:36,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:36,098 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:36,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:36,098 INFO L225 Difference]: With dead ends: 551 [2021-04-15 02:00:36,098 INFO L226 Difference]: Without dead ends: 448 [2021-04-15 02:00:36,098 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 79.4ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:36,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-04-15 02:00:36,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 252. [2021-04-15 02:00:36,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 3.1155378486055776) internal successors, (782), 251 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:36,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 782 transitions. [2021-04-15 02:00:36,104 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 782 transitions. Word has length 21 [2021-04-15 02:00:36,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:36,104 INFO L480 AbstractCegarLoop]: Abstraction has 252 states and 782 transitions. [2021-04-15 02:00:36,104 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:36,104 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 782 transitions. [2021-04-15 02:00:36,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:36,105 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:36,105 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:36,105 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2021-04-15 02:00:36,105 INFO L428 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:36,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:36,106 INFO L82 PathProgramCache]: Analyzing trace with hash 906396826, now seen corresponding path program 112 times [2021-04-15 02:00:36,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:36,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237026707] [2021-04-15 02:00:36,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:36,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:36,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:36,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237026707] [2021-04-15 02:00:36,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:36,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:36,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046368704] [2021-04-15 02:00:36,163 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:36,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:36,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:36,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:36,164 INFO L87 Difference]: Start difference. First operand 252 states and 782 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:36,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:36,200 INFO L93 Difference]: Finished difference Result 483 states and 1455 transitions. [2021-04-15 02:00:36,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:36,200 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:36,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:36,201 INFO L225 Difference]: With dead ends: 483 [2021-04-15 02:00:36,201 INFO L226 Difference]: Without dead ends: 356 [2021-04-15 02:00:36,201 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 65.6ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:36,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-04-15 02:00:36,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 240. [2021-04-15 02:00:36,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 3.1129707112970713) internal successors, (744), 239 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:36,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 744 transitions. [2021-04-15 02:00:36,205 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 744 transitions. Word has length 21 [2021-04-15 02:00:36,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:36,205 INFO L480 AbstractCegarLoop]: Abstraction has 240 states and 744 transitions. [2021-04-15 02:00:36,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:36,205 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 744 transitions. [2021-04-15 02:00:36,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:36,205 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:36,205 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:36,205 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2021-04-15 02:00:36,205 INFO L428 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:36,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:36,205 INFO L82 PathProgramCache]: Analyzing trace with hash 100048508, now seen corresponding path program 113 times [2021-04-15 02:00:36,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:36,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755041451] [2021-04-15 02:00:36,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:36,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:36,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:36,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755041451] [2021-04-15 02:00:36,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:36,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:36,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571405590] [2021-04-15 02:00:36,260 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:36,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:36,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:36,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:36,261 INFO L87 Difference]: Start difference. First operand 240 states and 744 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:36,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:36,301 INFO L93 Difference]: Finished difference Result 491 states and 1491 transitions. [2021-04-15 02:00:36,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:36,301 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:36,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:36,302 INFO L225 Difference]: With dead ends: 491 [2021-04-15 02:00:36,302 INFO L226 Difference]: Without dead ends: 374 [2021-04-15 02:00:36,302 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 65.6ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:36,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-04-15 02:00:36,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 258. [2021-04-15 02:00:36,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 3.093385214007782) internal successors, (795), 257 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:36,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 795 transitions. [2021-04-15 02:00:36,305 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 795 transitions. Word has length 21 [2021-04-15 02:00:36,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:36,306 INFO L480 AbstractCegarLoop]: Abstraction has 258 states and 795 transitions. [2021-04-15 02:00:36,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:36,306 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 795 transitions. [2021-04-15 02:00:36,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:36,306 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:36,306 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:36,306 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2021-04-15 02:00:36,306 INFO L428 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:36,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:36,306 INFO L82 PathProgramCache]: Analyzing trace with hash -228334374, now seen corresponding path program 114 times [2021-04-15 02:00:36,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:36,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858967801] [2021-04-15 02:00:36,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:36,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:36,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:36,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858967801] [2021-04-15 02:00:36,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:36,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:36,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464199114] [2021-04-15 02:00:36,359 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:36,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:36,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:36,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:36,359 INFO L87 Difference]: Start difference. First operand 258 states and 795 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:36,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:36,398 INFO L93 Difference]: Finished difference Result 373 states and 1131 transitions. [2021-04-15 02:00:36,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:36,399 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:36,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:36,399 INFO L225 Difference]: With dead ends: 373 [2021-04-15 02:00:36,399 INFO L226 Difference]: Without dead ends: 234 [2021-04-15 02:00:36,399 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 66.9ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:36,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-04-15 02:00:36,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 234. [2021-04-15 02:00:36,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 3.128755364806867) internal successors, (729), 233 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:36,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 729 transitions. [2021-04-15 02:00:36,402 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 729 transitions. Word has length 21 [2021-04-15 02:00:36,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:36,402 INFO L480 AbstractCegarLoop]: Abstraction has 234 states and 729 transitions. [2021-04-15 02:00:36,402 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:36,402 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 729 transitions. [2021-04-15 02:00:36,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:36,403 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:36,403 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:36,403 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2021-04-15 02:00:36,403 INFO L428 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:36,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:36,403 INFO L82 PathProgramCache]: Analyzing trace with hash 2142828290, now seen corresponding path program 115 times [2021-04-15 02:00:36,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:36,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614074592] [2021-04-15 02:00:36,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:36,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:36,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:36,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614074592] [2021-04-15 02:00:36,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:36,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:36,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177298269] [2021-04-15 02:00:36,470 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:36,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:36,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:36,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:36,470 INFO L87 Difference]: Start difference. First operand 234 states and 729 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:36,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:36,496 INFO L93 Difference]: Finished difference Result 417 states and 1238 transitions. [2021-04-15 02:00:36,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:36,497 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:36,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:36,497 INFO L225 Difference]: With dead ends: 417 [2021-04-15 02:00:36,497 INFO L226 Difference]: Without dead ends: 314 [2021-04-15 02:00:36,497 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 65.9ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:36,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-04-15 02:00:36,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 234. [2021-04-15 02:00:36,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 3.07725321888412) internal successors, (717), 233 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:36,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 717 transitions. [2021-04-15 02:00:36,500 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 717 transitions. Word has length 21 [2021-04-15 02:00:36,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:36,501 INFO L480 AbstractCegarLoop]: Abstraction has 234 states and 717 transitions. [2021-04-15 02:00:36,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:36,501 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 717 transitions. [2021-04-15 02:00:36,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:36,501 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:36,501 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:36,501 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2021-04-15 02:00:36,501 INFO L428 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:36,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:36,501 INFO L82 PathProgramCache]: Analyzing trace with hash 573899748, now seen corresponding path program 116 times [2021-04-15 02:00:36,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:36,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395090031] [2021-04-15 02:00:36,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:36,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:36,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:36,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395090031] [2021-04-15 02:00:36,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:36,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:36,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683222611] [2021-04-15 02:00:36,561 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:36,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:36,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:36,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:36,561 INFO L87 Difference]: Start difference. First operand 234 states and 717 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:36,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:36,599 INFO L93 Difference]: Finished difference Result 431 states and 1275 transitions. [2021-04-15 02:00:36,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:36,599 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:36,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:36,600 INFO L225 Difference]: With dead ends: 431 [2021-04-15 02:00:36,600 INFO L226 Difference]: Without dead ends: 302 [2021-04-15 02:00:36,600 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 75.8ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:36,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-04-15 02:00:36,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 222. [2021-04-15 02:00:36,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 3.072398190045249) internal successors, (679), 221 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:36,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 679 transitions. [2021-04-15 02:00:36,603 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 679 transitions. Word has length 21 [2021-04-15 02:00:36,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:36,603 INFO L480 AbstractCegarLoop]: Abstraction has 222 states and 679 transitions. [2021-04-15 02:00:36,603 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:36,603 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 679 transitions. [2021-04-15 02:00:36,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:36,603 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:36,603 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:36,604 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2021-04-15 02:00:36,604 INFO L428 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:36,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:36,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1071076380, now seen corresponding path program 117 times [2021-04-15 02:00:36,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:36,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772907374] [2021-04-15 02:00:36,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:36,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:36,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:36,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772907374] [2021-04-15 02:00:36,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:36,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:36,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384080970] [2021-04-15 02:00:36,670 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:36,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:36,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:36,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:36,671 INFO L87 Difference]: Start difference. First operand 222 states and 679 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:36,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:36,697 INFO L93 Difference]: Finished difference Result 381 states and 1112 transitions. [2021-04-15 02:00:36,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:36,698 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:36,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:36,698 INFO L225 Difference]: With dead ends: 381 [2021-04-15 02:00:36,698 INFO L226 Difference]: Without dead ends: 278 [2021-04-15 02:00:36,698 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 70.4ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:36,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-04-15 02:00:36,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 198. [2021-04-15 02:00:36,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 3.0) internal successors, (591), 197 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:36,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 591 transitions. [2021-04-15 02:00:36,701 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 591 transitions. Word has length 21 [2021-04-15 02:00:36,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:36,701 INFO L480 AbstractCegarLoop]: Abstraction has 198 states and 591 transitions. [2021-04-15 02:00:36,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:36,701 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 591 transitions. [2021-04-15 02:00:36,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:36,701 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:36,701 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:36,701 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2021-04-15 02:00:36,701 INFO L428 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:36,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:36,702 INFO L82 PathProgramCache]: Analyzing trace with hash -41772188, now seen corresponding path program 118 times [2021-04-15 02:00:36,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:36,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557147168] [2021-04-15 02:00:36,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:36,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:36,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:36,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557147168] [2021-04-15 02:00:36,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:36,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:36,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346937691] [2021-04-15 02:00:36,753 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:36,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:36,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:36,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:36,753 INFO L87 Difference]: Start difference. First operand 198 states and 591 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:36,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:36,786 INFO L93 Difference]: Finished difference Result 313 states and 927 transitions. [2021-04-15 02:00:36,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:36,786 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:36,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:36,786 INFO L225 Difference]: With dead ends: 313 [2021-04-15 02:00:36,786 INFO L226 Difference]: Without dead ends: 186 [2021-04-15 02:00:36,787 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 64.9ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:36,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-04-15 02:00:36,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2021-04-15 02:00:36,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.9891891891891893) internal successors, (553), 185 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:36,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 553 transitions. [2021-04-15 02:00:36,789 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 553 transitions. Word has length 21 [2021-04-15 02:00:36,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:36,789 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 553 transitions. [2021-04-15 02:00:36,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:36,789 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 553 transitions. [2021-04-15 02:00:36,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:36,789 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:36,789 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:36,789 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2021-04-15 02:00:36,789 INFO L428 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:36,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:36,790 INFO L82 PathProgramCache]: Analyzing trace with hash -920778810, now seen corresponding path program 119 times [2021-04-15 02:00:36,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:36,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422086769] [2021-04-15 02:00:36,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:36,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:36,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:36,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422086769] [2021-04-15 02:00:36,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:36,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:36,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453713002] [2021-04-15 02:00:36,841 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:36,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:36,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:36,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:36,841 INFO L87 Difference]: Start difference. First operand 186 states and 553 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:36,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:36,876 INFO L93 Difference]: Finished difference Result 265 states and 769 transitions. [2021-04-15 02:00:36,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:36,876 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:36,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:36,877 INFO L225 Difference]: With dead ends: 265 [2021-04-15 02:00:36,877 INFO L226 Difference]: Without dead ends: 148 [2021-04-15 02:00:36,877 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 68.5ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:36,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-04-15 02:00:36,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2021-04-15 02:00:36,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.7891156462585034) internal successors, (410), 147 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:36,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 410 transitions. [2021-04-15 02:00:36,879 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 410 transitions. Word has length 21 [2021-04-15 02:00:36,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:36,879 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 410 transitions. [2021-04-15 02:00:36,879 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:36,879 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 410 transitions. [2021-04-15 02:00:36,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:00:36,879 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:00:36,879 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:00:36,879 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2021-04-15 02:00:36,879 INFO L428 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 02:00:36,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:00:36,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1330851492, now seen corresponding path program 120 times [2021-04-15 02:00:36,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:00:36,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181514520] [2021-04-15 02:00:36,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:00:36,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:00:36,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:00:36,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181514520] [2021-04-15 02:00:36,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:00:36,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:00:36,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821600473] [2021-04-15 02:00:36,930 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:00:36,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:00:36,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:00:36,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:00:36,931 INFO L87 Difference]: Start difference. First operand 148 states and 410 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:36,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:00:36,963 INFO L93 Difference]: Finished difference Result 147 states and 409 transitions. [2021-04-15 02:00:36,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:00:36,963 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:00:36,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:00:36,963 INFO L225 Difference]: With dead ends: 147 [2021-04-15 02:00:36,963 INFO L226 Difference]: Without dead ends: 0 [2021-04-15 02:00:36,963 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 68.2ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:00:36,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-04-15 02:00:36,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-04-15 02:00:36,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:36,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-04-15 02:00:36,963 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2021-04-15 02:00:36,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:00:36,964 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-04-15 02:00:36,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:00:36,964 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-04-15 02:00:36,964 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-04-15 02:00:36,964 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2021-04-15 02:00:36,967 INFO L202 PluginConnector]: Adding new model example_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.04 02:00:36 BasicIcfg [2021-04-15 02:00:36,967 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-04-15 02:00:36,967 INFO L168 Benchmark]: Toolchain (without parser) took 15221.21 ms. Allocated memory was 255.9 MB in the beginning and 522.2 MB in the end (delta: 266.3 MB). Free memory was 236.5 MB in the beginning and 503.0 MB in the end (delta: -266.5 MB). Peak memory consumption was 321.7 kB. Max. memory is 16.0 GB. [2021-04-15 02:00:36,967 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 255.9 MB. Free memory was 237.6 MB in the beginning and 237.5 MB in the end (delta: 92.5 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-04-15 02:00:36,967 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.52 ms. Allocated memory is still 255.9 MB. Free memory was 236.4 MB in the beginning and 235.0 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-04-15 02:00:36,967 INFO L168 Benchmark]: Boogie Preprocessor took 10.45 ms. Allocated memory is still 255.9 MB. Free memory was 235.0 MB in the beginning and 234.2 MB in the end (delta: 784.2 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-04-15 02:00:36,968 INFO L168 Benchmark]: RCFGBuilder took 197.48 ms. Allocated memory is still 255.9 MB. Free memory was 234.1 MB in the beginning and 240.2 MB in the end (delta: -6.1 MB). Peak memory consumption was 22.4 MB. Max. memory is 16.0 GB. [2021-04-15 02:00:36,968 INFO L168 Benchmark]: TraceAbstraction took 14988.18 ms. Allocated memory was 255.9 MB in the beginning and 522.2 MB in the end (delta: 266.3 MB). Free memory was 239.8 MB in the beginning and 503.0 MB in the end (delta: -263.2 MB). Peak memory consumption was 3.1 MB. Max. memory is 16.0 GB. [2021-04-15 02:00:36,968 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 255.9 MB. Free memory was 237.6 MB in the beginning and 237.5 MB in the end (delta: 92.5 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 20.52 ms. Allocated memory is still 255.9 MB. Free memory was 236.4 MB in the beginning and 235.0 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 10.45 ms. Allocated memory is still 255.9 MB. Free memory was 235.0 MB in the beginning and 234.2 MB in the end (delta: 784.2 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 197.48 ms. Allocated memory is still 255.9 MB. Free memory was 234.1 MB in the beginning and 240.2 MB in the end (delta: -6.1 MB). Peak memory consumption was 22.4 MB. Max. memory is 16.0 GB. * TraceAbstraction took 14988.18 ms. Allocated memory was 255.9 MB in the beginning and 522.2 MB in the end (delta: 266.3 MB). Free memory was 239.8 MB in the beginning and 503.0 MB in the end (delta: -263.2 MB). Peak memory consumption was 3.1 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 23]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 14857.8ms, OverallIterations: 123, TraceHistogramMax: 1, EmptinessCheckTime: 126.5ms, AutomataDifference: 5352.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 78.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 7865 SDtfs, 10029 SDslu, 14790 SDs, 0 SdLazy, 2783 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1503.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 849 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 723 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 8149.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1148occurred in iteration=0, InterpolantAutomatonStates: 849, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1275.7ms AutomataMinimizationTime, 123 MinimizatonAttempts, 44064 StatesRemovedByMinimization, 116 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 53.1ms SsaConstructionTime, 143.2ms SatisfiabilityAnalysisTime, 7366.3ms InterpolantComputationTime, 2583 NumberOfCodeBlocks, 2583 NumberOfCodeBlocksAsserted, 123 NumberOfCheckSat, 2460 ConstructedInterpolants, 0 QuantifiedInterpolants, 48805 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 123 InterpolantComputations, 123 PerfectInterpolantSequences, 0/0 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 proved your program to be correct! Received shutdown request...