/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/lamport.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9b7772ad7705253c1305067fc38dc9bc7271fbe3-9b7772a [2021-04-15 03:20:34,678 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-04-15 03:20:34,680 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-04-15 03:20:34,705 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-04-15 03:20:34,758 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 03:20:34,788 INFO L113 SettingsManager]: Loading preferences was successful [2021-04-15 03:20:34,788 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-04-15 03:20:34,789 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-04-15 03:20:34,789 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-04-15 03:20:34,792 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-04-15 03:20:34,792 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-04-15 03:20:34,793 INFO L138 SettingsManager]: * Use SBE=true [2021-04-15 03:20:34,793 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-04-15 03:20:34,793 INFO L138 SettingsManager]: * sizeof long=4 [2021-04-15 03:20:34,793 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-04-15 03:20:34,794 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-04-15 03:20:34,794 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-04-15 03:20:34,794 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-04-15 03:20:34,794 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-04-15 03:20:34,794 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-04-15 03:20:34,794 INFO L138 SettingsManager]: * sizeof long double=12 [2021-04-15 03:20:34,794 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-04-15 03:20:34,794 INFO L138 SettingsManager]: * Use constant arrays=true [2021-04-15 03:20:34,795 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-04-15 03:20:34,795 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-04-15 03:20:34,795 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-04-15 03:20:34,795 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-04-15 03:20:34,795 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-04-15 03:20:34,795 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-15 03:20:34,795 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-04-15 03:20:34,795 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-04-15 03:20:34,795 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-04-15 03:20:34,795 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-04-15 03:20:34,796 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-04-15 03:20:34,796 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-04-15 03:20:34,796 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-04-15 03:20:34,796 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-04-15 03:20:35,081 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-04-15 03:20:35,097 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-04-15 03:20:35,099 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-04-15 03:20:35,099 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-04-15 03:20:35,100 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-04-15 03:20:35,101 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/lamport.wvr.bpl [2021-04-15 03:20:35,101 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/lamport.wvr.bpl' [2021-04-15 03:20:35,162 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-04-15 03:20:35,163 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-04-15 03:20:35,164 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-04-15 03:20:35,165 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-04-15 03:20:35,165 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-04-15 03:20:35,176 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "lamport.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:20:35" (1/1) ... [2021-04-15 03:20:35,184 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "lamport.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:20:35" (1/1) ... [2021-04-15 03:20:35,191 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-04-15 03:20:35,193 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-04-15 03:20:35,194 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-04-15 03:20:35,194 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-04-15 03:20:35,200 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "lamport.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:20:35" (1/1) ... [2021-04-15 03:20:35,201 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "lamport.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:20:35" (1/1) ... [2021-04-15 03:20:35,202 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "lamport.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:20:35" (1/1) ... [2021-04-15 03:20:35,203 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "lamport.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:20:35" (1/1) ... [2021-04-15 03:20:35,205 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "lamport.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:20:35" (1/1) ... [2021-04-15 03:20:35,206 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "lamport.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:20:35" (1/1) ... [2021-04-15 03:20:35,206 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "lamport.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:20:35" (1/1) ... [2021-04-15 03:20:35,207 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-04-15 03:20:35,209 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-04-15 03:20:35,209 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-04-15 03:20:35,209 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-04-15 03:20:35,212 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "lamport.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:20:35" (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 03:20:35,276 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-04-15 03:20:35,276 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-04-15 03:20:35,277 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-04-15 03:20:35,277 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-04-15 03:20:35,277 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-04-15 03:20:35,277 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-04-15 03:20:35,277 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-04-15 03:20:35,277 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-04-15 03:20:35,277 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-04-15 03:20:35,277 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-04-15 03:20:35,277 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-04-15 03:20:35,277 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-04-15 03:20:35,280 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 03:20:35,430 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-04-15 03:20:35,430 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-04-15 03:20:35,432 INFO L202 PluginConnector]: Adding new model lamport.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 03:20:35 BoogieIcfgContainer [2021-04-15 03:20:35,432 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-04-15 03:20:35,433 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-04-15 03:20:35,433 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-04-15 03:20:35,435 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-04-15 03:20:35,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "lamport.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:20:35" (1/2) ... [2021-04-15 03:20:35,453 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37dde7ad and model type lamport.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.04 03:20:35, skipping insertion in model container [2021-04-15 03:20:35,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "lamport.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 03:20:35" (2/2) ... [2021-04-15 03:20:35,455 INFO L111 eAbstractionObserver]: Analyzing ICFG lamport.wvr.bpl [2021-04-15 03:20:35,459 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-04-15 03:20:35,459 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-04-15 03:20:35,462 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-04-15 03:20:35,463 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-04-15 03:20:35,498 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-04-15 03:20:35,511 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-04-15 03:20:35,526 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-04-15 03:20:35,526 INFO L377 AbstractCegarLoop]: Hoare is true [2021-04-15 03:20:35,526 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-04-15 03:20:35,526 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-04-15 03:20:35,526 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-04-15 03:20:35,526 INFO L381 AbstractCegarLoop]: Difference is false [2021-04-15 03:20:35,526 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-04-15 03:20:35,526 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-04-15 03:20:35,561 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 51 places, 41 transitions, 106 flow [2021-04-15 03:20:35,646 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 675 states, 673 states have (on average 2.585438335809807) internal successors, (1740), 674 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:20:35,650 INFO L276 IsEmpty]: Start isEmpty. Operand has 675 states, 673 states have (on average 2.585438335809807) internal successors, (1740), 674 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:20:35,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 03:20:35,671 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:20:35,672 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:20:35,673 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:20:35,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:20:35,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1721712362, now seen corresponding path program 1 times [2021-04-15 03:20:35,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:20:35,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187582201] [2021-04-15 03:20:35,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:20:35,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:20:35,971 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 03:20:35,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187582201] [2021-04-15 03:20:35,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 03:20:35,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 03:20:35,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847462548] [2021-04-15 03:20:35,976 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 03:20:35,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:20:35,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 03:20:35,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-04-15 03:20:35,993 INFO L87 Difference]: Start difference. First operand has 675 states, 673 states have (on average 2.585438335809807) internal successors, (1740), 674 states have internal predecessors, (1740), 0 states have call successors, (0), 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 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:20:36,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:20:36,255 INFO L93 Difference]: Finished difference Result 998 states and 2445 transitions. [2021-04-15 03:20:36,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 03:20:36,257 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 03:20:36,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:20:36,273 INFO L225 Difference]: With dead ends: 998 [2021-04-15 03:20:36,273 INFO L226 Difference]: Without dead ends: 923 [2021-04-15 03:20:36,274 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 139.3ms TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-04-15 03:20:36,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2021-04-15 03:20:36,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 687. [2021-04-15 03:20:36,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 686 states have (on average 2.564139941690962) internal successors, (1759), 686 states have internal predecessors, (1759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:20:36,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 1759 transitions. [2021-04-15 03:20:36,373 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 1759 transitions. Word has length 36 [2021-04-15 03:20:36,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:20:36,373 INFO L480 AbstractCegarLoop]: Abstraction has 687 states and 1759 transitions. [2021-04-15 03:20:36,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:20:36,374 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 1759 transitions. [2021-04-15 03:20:36,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 03:20:36,376 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:20:36,376 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:20:36,376 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-04-15 03:20:36,377 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:20:36,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:20:36,379 INFO L82 PathProgramCache]: Analyzing trace with hash 828952404, now seen corresponding path program 2 times [2021-04-15 03:20:36,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:20:36,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928037499] [2021-04-15 03:20:36,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:20:36,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:20:36,462 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 03:20:36,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928037499] [2021-04-15 03:20:36,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 03:20:36,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-04-15 03:20:36,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040695431] [2021-04-15 03:20:36,467 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 03:20:36,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:20:36,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 03:20:36,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-04-15 03:20:36,471 INFO L87 Difference]: Start difference. First operand 687 states and 1759 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:20:36,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:20:36,590 INFO L93 Difference]: Finished difference Result 1384 states and 3517 transitions. [2021-04-15 03:20:36,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 03:20:36,591 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 03:20:36,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:20:36,597 INFO L225 Difference]: With dead ends: 1384 [2021-04-15 03:20:36,597 INFO L226 Difference]: Without dead ends: 1324 [2021-04-15 03:20:36,599 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 69.3ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-04-15 03:20:36,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1324 states. [2021-04-15 03:20:36,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1324 to 755. [2021-04-15 03:20:36,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 754 states have (on average 2.5450928381962865) internal successors, (1919), 754 states have internal predecessors, (1919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:20:36,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 1919 transitions. [2021-04-15 03:20:36,632 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 1919 transitions. Word has length 36 [2021-04-15 03:20:36,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:20:36,632 INFO L480 AbstractCegarLoop]: Abstraction has 755 states and 1919 transitions. [2021-04-15 03:20:36,632 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:20:36,632 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 1919 transitions. [2021-04-15 03:20:36,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 03:20:36,634 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:20:36,634 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:20:36,634 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-04-15 03:20:36,634 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:20:36,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:20:36,636 INFO L82 PathProgramCache]: Analyzing trace with hash -842125034, now seen corresponding path program 3 times [2021-04-15 03:20:36,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:20:36,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449321195] [2021-04-15 03:20:36,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:20:36,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:20:36,712 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 03:20:36,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449321195] [2021-04-15 03:20:36,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 03:20:36,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 03:20:36,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418026473] [2021-04-15 03:20:36,713 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 03:20:36,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:20:36,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 03:20:36,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-04-15 03:20:36,714 INFO L87 Difference]: Start difference. First operand 755 states and 1919 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:20:36,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:20:36,919 INFO L93 Difference]: Finished difference Result 1230 states and 2984 transitions. [2021-04-15 03:20:36,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 03:20:36,920 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 03:20:36,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:20:36,924 INFO L225 Difference]: With dead ends: 1230 [2021-04-15 03:20:36,925 INFO L226 Difference]: Without dead ends: 1044 [2021-04-15 03:20:36,925 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 116.9ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-04-15 03:20:36,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2021-04-15 03:20:36,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 826. [2021-04-15 03:20:36,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 825 states have (on average 2.493333333333333) internal successors, (2057), 825 states have internal predecessors, (2057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:20:36,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 2057 transitions. [2021-04-15 03:20:36,960 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 2057 transitions. Word has length 36 [2021-04-15 03:20:36,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:20:36,962 INFO L480 AbstractCegarLoop]: Abstraction has 826 states and 2057 transitions. [2021-04-15 03:20:36,962 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:20:36,967 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 2057 transitions. [2021-04-15 03:20:36,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 03:20:36,971 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:20:36,971 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:20:36,971 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-04-15 03:20:36,972 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:20:36,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:20:36,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1087553612, now seen corresponding path program 4 times [2021-04-15 03:20:36,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:20:36,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373875394] [2021-04-15 03:20:36,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:20:36,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:20:37,052 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 03:20:37,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373875394] [2021-04-15 03:20:37,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 03:20:37,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 03:20:37,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755219975] [2021-04-15 03:20:37,053 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 03:20:37,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:20:37,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 03:20:37,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-04-15 03:20:37,054 INFO L87 Difference]: Start difference. First operand 826 states and 2057 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:20:37,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:20:37,227 INFO L93 Difference]: Finished difference Result 1148 states and 2767 transitions. [2021-04-15 03:20:37,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 03:20:37,227 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 03:20:37,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:20:37,233 INFO L225 Difference]: With dead ends: 1148 [2021-04-15 03:20:37,233 INFO L226 Difference]: Without dead ends: 1024 [2021-04-15 03:20:37,234 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 87.2ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-04-15 03:20:37,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2021-04-15 03:20:37,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 822. [2021-04-15 03:20:37,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 822 states, 821 states have (on average 2.4859926918392206) internal successors, (2041), 821 states have internal predecessors, (2041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:20:37,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 2041 transitions. [2021-04-15 03:20:37,259 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 2041 transitions. Word has length 36 [2021-04-15 03:20:37,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:20:37,261 INFO L480 AbstractCegarLoop]: Abstraction has 822 states and 2041 transitions. [2021-04-15 03:20:37,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:20:37,261 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 2041 transitions. [2021-04-15 03:20:37,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 03:20:37,263 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:20:37,263 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:20:37,263 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-04-15 03:20:37,263 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:20:37,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:20:37,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1449429270, now seen corresponding path program 5 times [2021-04-15 03:20:37,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:20:37,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320695278] [2021-04-15 03:20:37,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:20:37,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:20:37,343 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 03:20:37,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320695278] [2021-04-15 03:20:37,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 03:20:37,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 03:20:37,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014428496] [2021-04-15 03:20:37,344 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 03:20:37,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:20:37,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 03:20:37,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-04-15 03:20:37,345 INFO L87 Difference]: Start difference. First operand 822 states and 2041 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:20:37,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:20:37,481 INFO L93 Difference]: Finished difference Result 1097 states and 2645 transitions. [2021-04-15 03:20:37,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 03:20:37,481 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 03:20:37,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:20:37,484 INFO L225 Difference]: With dead ends: 1097 [2021-04-15 03:20:37,485 INFO L226 Difference]: Without dead ends: 908 [2021-04-15 03:20:37,485 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 68.1ms TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-04-15 03:20:37,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 908 states. [2021-04-15 03:20:37,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 908 to 736. [2021-04-15 03:20:37,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 735 states have (on average 2.491156462585034) internal successors, (1831), 735 states have internal predecessors, (1831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:20:37,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 1831 transitions. [2021-04-15 03:20:37,503 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 1831 transitions. Word has length 36 [2021-04-15 03:20:37,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:20:37,503 INFO L480 AbstractCegarLoop]: Abstraction has 736 states and 1831 transitions. [2021-04-15 03:20:37,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:20:37,503 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 1831 transitions. [2021-04-15 03:20:37,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 03:20:37,505 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:20:37,505 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:20:37,505 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-04-15 03:20:37,505 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:20:37,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:20:37,505 INFO L82 PathProgramCache]: Analyzing trace with hash 798543570, now seen corresponding path program 6 times [2021-04-15 03:20:37,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:20:37,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226456824] [2021-04-15 03:20:37,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:20:37,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:20:37,546 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 03:20:37,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226456824] [2021-04-15 03:20:37,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 03:20:37,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-04-15 03:20:37,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983892345] [2021-04-15 03:20:37,547 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 03:20:37,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:20:37,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 03:20:37,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-04-15 03:20:37,548 INFO L87 Difference]: Start difference. First operand 736 states and 1831 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:20:37,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:20:37,764 INFO L93 Difference]: Finished difference Result 1141 states and 2693 transitions. [2021-04-15 03:20:37,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 03:20:37,765 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 03:20:37,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:20:37,771 INFO L225 Difference]: With dead ends: 1141 [2021-04-15 03:20:37,771 INFO L226 Difference]: Without dead ends: 1011 [2021-04-15 03:20:37,771 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 108.3ms TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-04-15 03:20:37,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1011 states. [2021-04-15 03:20:37,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1011 to 778. [2021-04-15 03:20:37,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 778 states, 777 states have (on average 2.4337194337194337) internal successors, (1891), 777 states have internal predecessors, (1891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:20:37,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 1891 transitions. [2021-04-15 03:20:37,791 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 1891 transitions. Word has length 36 [2021-04-15 03:20:37,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:20:37,791 INFO L480 AbstractCegarLoop]: Abstraction has 778 states and 1891 transitions. [2021-04-15 03:20:37,792 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:20:37,792 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 1891 transitions. [2021-04-15 03:20:37,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 03:20:37,793 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:20:37,793 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:20:37,793 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-04-15 03:20:37,793 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:20:37,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:20:37,794 INFO L82 PathProgramCache]: Analyzing trace with hash 553114992, now seen corresponding path program 7 times [2021-04-15 03:20:37,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:20:37,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092724296] [2021-04-15 03:20:37,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:20:37,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:20:37,829 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 03:20:37,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092724296] [2021-04-15 03:20:37,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 03:20:37,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 03:20:37,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057266021] [2021-04-15 03:20:37,830 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 03:20:37,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:20:37,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 03:20:37,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-04-15 03:20:37,831 INFO L87 Difference]: Start difference. First operand 778 states and 1891 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:20:37,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:20:37,996 INFO L93 Difference]: Finished difference Result 1138 states and 2685 transitions. [2021-04-15 03:20:37,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 03:20:37,996 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 03:20:37,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:20:38,000 INFO L225 Difference]: With dead ends: 1138 [2021-04-15 03:20:38,000 INFO L226 Difference]: Without dead ends: 1070 [2021-04-15 03:20:38,001 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 87.7ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-04-15 03:20:38,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1070 states. [2021-04-15 03:20:38,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1070 to 774. [2021-04-15 03:20:38,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 773 states have (on average 2.425614489003881) internal successors, (1875), 773 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:20:38,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 1875 transitions. [2021-04-15 03:20:38,018 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 1875 transitions. Word has length 36 [2021-04-15 03:20:38,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:20:38,018 INFO L480 AbstractCegarLoop]: Abstraction has 774 states and 1875 transitions. [2021-04-15 03:20:38,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:20:38,018 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 1875 transitions. [2021-04-15 03:20:38,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 03:20:38,020 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:20:38,020 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:20:38,020 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-04-15 03:20:38,020 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:20:38,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:20:38,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1204869422, now seen corresponding path program 8 times [2021-04-15 03:20:38,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:20:38,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86877820] [2021-04-15 03:20:38,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:20:38,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:20:38,054 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 03:20:38,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86877820] [2021-04-15 03:20:38,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 03:20:38,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 03:20:38,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945746481] [2021-04-15 03:20:38,055 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 03:20:38,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:20:38,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 03:20:38,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-04-15 03:20:38,055 INFO L87 Difference]: Start difference. First operand 774 states and 1875 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:20:38,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:20:38,205 INFO L93 Difference]: Finished difference Result 968 states and 2319 transitions. [2021-04-15 03:20:38,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 03:20:38,206 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 03:20:38,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:20:38,209 INFO L225 Difference]: With dead ends: 968 [2021-04-15 03:20:38,209 INFO L226 Difference]: Without dead ends: 814 [2021-04-15 03:20:38,209 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 73.2ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-04-15 03:20:38,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2021-04-15 03:20:38,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 710. [2021-04-15 03:20:38,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 710 states, 709 states have (on average 2.431593794076164) internal successors, (1724), 709 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:20:38,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 1724 transitions. [2021-04-15 03:20:38,223 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 1724 transitions. Word has length 36 [2021-04-15 03:20:38,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:20:38,223 INFO L480 AbstractCegarLoop]: Abstraction has 710 states and 1724 transitions. [2021-04-15 03:20:38,224 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:20:38,224 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 1724 transitions. [2021-04-15 03:20:38,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 03:20:38,227 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:20:38,227 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:20:38,227 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-04-15 03:20:38,227 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:20:38,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:20:38,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1391303088, now seen corresponding path program 9 times [2021-04-15 03:20:38,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:20:38,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585855350] [2021-04-15 03:20:38,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:20:38,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:20:38,319 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 03:20:38,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585855350] [2021-04-15 03:20:38,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 03:20:38,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 03:20:38,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37069051] [2021-04-15 03:20:38,320 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 03:20:38,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:20:38,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 03:20:38,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-04-15 03:20:38,321 INFO L87 Difference]: Start difference. First operand 710 states and 1724 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:20:38,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:20:38,421 INFO L93 Difference]: Finished difference Result 966 states and 2274 transitions. [2021-04-15 03:20:38,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 03:20:38,422 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 03:20:38,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:20:38,424 INFO L225 Difference]: With dead ends: 966 [2021-04-15 03:20:38,425 INFO L226 Difference]: Without dead ends: 811 [2021-04-15 03:20:38,425 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 79.3ms TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-04-15 03:20:38,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2021-04-15 03:20:38,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 667. [2021-04-15 03:20:38,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 666 states have (on average 2.4084084084084085) internal successors, (1604), 666 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:20:38,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 1604 transitions. [2021-04-15 03:20:38,440 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 1604 transitions. Word has length 36 [2021-04-15 03:20:38,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:20:38,440 INFO L480 AbstractCegarLoop]: Abstraction has 667 states and 1604 transitions. [2021-04-15 03:20:38,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:20:38,441 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 1604 transitions. [2021-04-15 03:20:38,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 03:20:38,442 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:20:38,442 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:20:38,442 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-04-15 03:20:38,442 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:20:38,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:20:38,443 INFO L82 PathProgramCache]: Analyzing trace with hash -272428818, now seen corresponding path program 10 times [2021-04-15 03:20:38,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:20:38,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337124363] [2021-04-15 03:20:38,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:20:38,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:20:38,476 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 03:20:38,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337124363] [2021-04-15 03:20:38,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 03:20:38,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 03:20:38,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821751172] [2021-04-15 03:20:38,477 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 03:20:38,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:20:38,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 03:20:38,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-04-15 03:20:38,478 INFO L87 Difference]: Start difference. First operand 667 states and 1604 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:20:38,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:20:38,617 INFO L93 Difference]: Finished difference Result 837 states and 1987 transitions. [2021-04-15 03:20:38,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 03:20:38,618 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 03:20:38,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:20:38,620 INFO L225 Difference]: With dead ends: 837 [2021-04-15 03:20:38,620 INFO L226 Difference]: Without dead ends: 704 [2021-04-15 03:20:38,621 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 71.4ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-04-15 03:20:38,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2021-04-15 03:20:38,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 600. [2021-04-15 03:20:38,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 599 states have (on average 2.4290484140233723) internal successors, (1455), 599 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:20:38,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 1455 transitions. [2021-04-15 03:20:38,633 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 1455 transitions. Word has length 36 [2021-04-15 03:20:38,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:20:38,634 INFO L480 AbstractCegarLoop]: Abstraction has 600 states and 1455 transitions. [2021-04-15 03:20:38,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:20:38,634 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 1455 transitions. [2021-04-15 03:20:38,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 03:20:38,635 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:20:38,635 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:20:38,635 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-04-15 03:20:38,635 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:20:38,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:20:38,636 INFO L82 PathProgramCache]: Analyzing trace with hash 649402124, now seen corresponding path program 11 times [2021-04-15 03:20:38,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:20:38,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757103685] [2021-04-15 03:20:38,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:20:38,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:20:38,673 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 03:20:38,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757103685] [2021-04-15 03:20:38,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 03:20:38,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-04-15 03:20:38,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306240440] [2021-04-15 03:20:38,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 03:20:38,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:20:38,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 03:20:38,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-04-15 03:20:38,675 INFO L87 Difference]: Start difference. First operand 600 states and 1455 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:20:38,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:20:38,821 INFO L93 Difference]: Finished difference Result 792 states and 1885 transitions. [2021-04-15 03:20:38,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 03:20:38,821 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 03:20:38,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:20:38,823 INFO L225 Difference]: With dead ends: 792 [2021-04-15 03:20:38,824 INFO L226 Difference]: Without dead ends: 743 [2021-04-15 03:20:38,824 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 80.3ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-04-15 03:20:38,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2021-04-15 03:20:38,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 606. [2021-04-15 03:20:38,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 605 states have (on average 2.4264462809917355) internal successors, (1468), 605 states have internal predecessors, (1468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:20:38,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 1468 transitions. [2021-04-15 03:20:38,836 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 1468 transitions. Word has length 36 [2021-04-15 03:20:38,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:20:38,836 INFO L480 AbstractCegarLoop]: Abstraction has 606 states and 1468 transitions. [2021-04-15 03:20:38,836 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:20:38,836 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 1468 transitions. [2021-04-15 03:20:38,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 03:20:38,838 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:20:38,838 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:20:38,838 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-04-15 03:20:38,838 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:20:38,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:20:38,838 INFO L82 PathProgramCache]: Analyzing trace with hash -377221528, now seen corresponding path program 12 times [2021-04-15 03:20:38,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:20:38,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807991399] [2021-04-15 03:20:38,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:20:38,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:20:38,880 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 03:20:38,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807991399] [2021-04-15 03:20:38,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 03:20:38,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 03:20:38,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551479701] [2021-04-15 03:20:38,881 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 03:20:38,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:20:38,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 03:20:38,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-04-15 03:20:38,882 INFO L87 Difference]: Start difference. First operand 606 states and 1468 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:20:38,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:20:38,950 INFO L93 Difference]: Finished difference Result 735 states and 1763 transitions. [2021-04-15 03:20:38,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 03:20:38,950 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 03:20:38,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:20:38,952 INFO L225 Difference]: With dead ends: 735 [2021-04-15 03:20:38,952 INFO L226 Difference]: Without dead ends: 557 [2021-04-15 03:20:38,954 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 40.4ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-04-15 03:20:38,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2021-04-15 03:20:38,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 490. [2021-04-15 03:20:38,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 2.4376278118609407) internal successors, (1192), 489 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:20:38,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1192 transitions. [2021-04-15 03:20:38,965 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1192 transitions. Word has length 36 [2021-04-15 03:20:38,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:20:38,965 INFO L480 AbstractCegarLoop]: Abstraction has 490 states and 1192 transitions. [2021-04-15 03:20:38,965 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:20:38,965 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1192 transitions. [2021-04-15 03:20:38,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 03:20:38,966 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:20:38,966 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:20:38,966 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-04-15 03:20:38,966 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:20:38,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:20:38,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1141840352, now seen corresponding path program 13 times [2021-04-15 03:20:38,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:20:38,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047444036] [2021-04-15 03:20:38,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:20:38,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:20:38,982 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 03:20:38,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047444036] [2021-04-15 03:20:38,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 03:20:38,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-15 03:20:38,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352125081] [2021-04-15 03:20:38,983 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-04-15 03:20:38,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:20:38,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-04-15 03:20:38,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-15 03:20:38,984 INFO L87 Difference]: Start difference. First operand 490 states and 1192 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:20:38,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:20:38,988 INFO L93 Difference]: Finished difference Result 460 states and 1108 transitions. [2021-04-15 03:20:38,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-04-15 03:20:38,989 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 03:20:38,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:20:38,990 INFO L225 Difference]: With dead ends: 460 [2021-04-15 03:20:38,990 INFO L226 Difference]: Without dead ends: 460 [2021-04-15 03:20:38,991 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-15 03:20:38,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-04-15 03:20:38,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 460. [2021-04-15 03:20:39,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 459 states have (on average 2.4139433551198257) internal successors, (1108), 459 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:20:39,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 1108 transitions. [2021-04-15 03:20:39,003 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 1108 transitions. Word has length 36 [2021-04-15 03:20:39,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:20:39,003 INFO L480 AbstractCegarLoop]: Abstraction has 460 states and 1108 transitions. [2021-04-15 03:20:39,003 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:20:39,003 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 1108 transitions. [2021-04-15 03:20:39,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 03:20:39,004 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:20:39,004 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:20:39,004 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-04-15 03:20:39,004 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:20:39,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:20:39,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1806691788, now seen corresponding path program 14 times [2021-04-15 03:20:39,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:20:39,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367567773] [2021-04-15 03:20:39,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:20:39,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:20:39,060 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 03:20:39,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367567773] [2021-04-15 03:20:39,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 03:20:39,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 03:20:39,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59426058] [2021-04-15 03:20:39,061 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 03:20:39,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:20:39,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 03:20:39,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-04-15 03:20:39,062 INFO L87 Difference]: Start difference. First operand 460 states and 1108 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:20:39,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:20:39,149 INFO L93 Difference]: Finished difference Result 711 states and 1632 transitions. [2021-04-15 03:20:39,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 03:20:39,149 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 03:20:39,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:20:39,151 INFO L225 Difference]: With dead ends: 711 [2021-04-15 03:20:39,151 INFO L226 Difference]: Without dead ends: 620 [2021-04-15 03:20:39,152 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 46.2ms TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-04-15 03:20:39,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2021-04-15 03:20:39,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 474. [2021-04-15 03:20:39,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 473 states have (on average 2.386892177589852) internal successors, (1129), 473 states have internal predecessors, (1129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:20:39,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 1129 transitions. [2021-04-15 03:20:39,162 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 1129 transitions. Word has length 36 [2021-04-15 03:20:39,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:20:39,162 INFO L480 AbstractCegarLoop]: Abstraction has 474 states and 1129 transitions. [2021-04-15 03:20:39,162 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:20:39,163 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 1129 transitions. [2021-04-15 03:20:39,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 03:20:39,163 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:20:39,163 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:20:39,163 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-04-15 03:20:39,163 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:20:39,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:20:39,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1002048854, now seen corresponding path program 15 times [2021-04-15 03:20:39,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:20:39,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541969790] [2021-04-15 03:20:39,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:20:39,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:20:39,228 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 03:20:39,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541969790] [2021-04-15 03:20:39,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 03:20:39,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-04-15 03:20:39,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778694427] [2021-04-15 03:20:39,228 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 03:20:39,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:20:39,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 03:20:39,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-04-15 03:20:39,229 INFO L87 Difference]: Start difference. First operand 474 states and 1129 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:20:39,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:20:39,344 INFO L93 Difference]: Finished difference Result 1309 states and 3098 transitions. [2021-04-15 03:20:39,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 03:20:39,344 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 03:20:39,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:20:39,348 INFO L225 Difference]: With dead ends: 1309 [2021-04-15 03:20:39,349 INFO L226 Difference]: Without dead ends: 1297 [2021-04-15 03:20:39,350 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 88.7ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-04-15 03:20:39,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1297 states. [2021-04-15 03:20:39,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1297 to 565. [2021-04-15 03:20:39,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 564 states have (on average 2.3900709219858154) internal successors, (1348), 564 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:20:39,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 1348 transitions. [2021-04-15 03:20:39,366 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 1348 transitions. Word has length 36 [2021-04-15 03:20:39,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:20:39,367 INFO L480 AbstractCegarLoop]: Abstraction has 565 states and 1348 transitions. [2021-04-15 03:20:39,367 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:20:39,367 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 1348 transitions. [2021-04-15 03:20:39,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 03:20:39,368 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:20:39,368 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:20:39,368 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-04-15 03:20:39,368 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:20:39,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:20:39,369 INFO L82 PathProgramCache]: Analyzing trace with hash -2018104662, now seen corresponding path program 16 times [2021-04-15 03:20:39,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:20:39,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781105626] [2021-04-15 03:20:39,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:20:39,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:20:39,436 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 03:20:39,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781105626] [2021-04-15 03:20:39,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 03:20:39,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-04-15 03:20:39,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104641925] [2021-04-15 03:20:39,438 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 03:20:39,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:20:39,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 03:20:39,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-04-15 03:20:39,439 INFO L87 Difference]: Start difference. First operand 565 states and 1348 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:20:39,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:20:39,546 INFO L93 Difference]: Finished difference Result 1256 states and 2954 transitions. [2021-04-15 03:20:39,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 03:20:39,546 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 03:20:39,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:20:39,550 INFO L225 Difference]: With dead ends: 1256 [2021-04-15 03:20:39,550 INFO L226 Difference]: Without dead ends: 1216 [2021-04-15 03:20:39,550 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 88.8ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-04-15 03:20:39,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1216 states. [2021-04-15 03:20:39,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1216 to 545. [2021-04-15 03:20:39,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 544 states have (on average 2.3713235294117645) internal successors, (1290), 544 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:20:39,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 1290 transitions. [2021-04-15 03:20:39,567 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 1290 transitions. Word has length 36 [2021-04-15 03:20:39,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:20:39,567 INFO L480 AbstractCegarLoop]: Abstraction has 545 states and 1290 transitions. [2021-04-15 03:20:39,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:20:39,567 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 1290 transitions. [2021-04-15 03:20:39,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 03:20:39,568 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:20:39,568 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:20:39,568 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-04-15 03:20:39,569 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:20:39,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:20:39,569 INFO L82 PathProgramCache]: Analyzing trace with hash 888977548, now seen corresponding path program 17 times [2021-04-15 03:20:39,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:20:39,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437615204] [2021-04-15 03:20:39,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:20:39,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:20:39,642 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 03:20:39,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437615204] [2021-04-15 03:20:39,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 03:20:39,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-04-15 03:20:39,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957187568] [2021-04-15 03:20:39,643 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 03:20:39,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:20:39,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 03:20:39,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-04-15 03:20:39,644 INFO L87 Difference]: Start difference. First operand 545 states and 1290 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:20:39,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:20:39,753 INFO L93 Difference]: Finished difference Result 1305 states and 3069 transitions. [2021-04-15 03:20:39,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 03:20:39,754 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 03:20:39,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:20:39,758 INFO L225 Difference]: With dead ends: 1305 [2021-04-15 03:20:39,758 INFO L226 Difference]: Without dead ends: 1293 [2021-04-15 03:20:39,758 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 93.6ms TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-04-15 03:20:39,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1293 states. [2021-04-15 03:20:39,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1293 to 600. [2021-04-15 03:20:39,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 599 states have (on average 2.3923205342237064) internal successors, (1433), 599 states have internal predecessors, (1433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:20:39,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 1433 transitions. [2021-04-15 03:20:39,773 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 1433 transitions. Word has length 36 [2021-04-15 03:20:39,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:20:39,773 INFO L480 AbstractCegarLoop]: Abstraction has 600 states and 1433 transitions. [2021-04-15 03:20:39,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:20:39,773 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 1433 transitions. [2021-04-15 03:20:39,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 03:20:39,774 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:20:39,774 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:20:39,775 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-04-15 03:20:39,775 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:20:39,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:20:39,775 INFO L82 PathProgramCache]: Analyzing trace with hash -127078260, now seen corresponding path program 18 times [2021-04-15 03:20:39,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:20:39,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505462500] [2021-04-15 03:20:39,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:20:39,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:20:39,835 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 03:20:39,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505462500] [2021-04-15 03:20:39,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 03:20:39,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-04-15 03:20:39,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097856605] [2021-04-15 03:20:39,837 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 03:20:39,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:20:39,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 03:20:39,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-04-15 03:20:39,837 INFO L87 Difference]: Start difference. First operand 600 states and 1433 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:20:39,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:20:39,943 INFO L93 Difference]: Finished difference Result 1252 states and 2925 transitions. [2021-04-15 03:20:39,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 03:20:39,944 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 03:20:39,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:20:39,947 INFO L225 Difference]: With dead ends: 1252 [2021-04-15 03:20:39,948 INFO L226 Difference]: Without dead ends: 1216 [2021-04-15 03:20:39,948 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 83.4ms TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-04-15 03:20:39,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1216 states. [2021-04-15 03:20:39,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1216 to 560. [2021-04-15 03:20:39,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 559 states have (on average 2.372093023255814) internal successors, (1326), 559 states have internal predecessors, (1326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:20:39,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 1326 transitions. [2021-04-15 03:20:39,962 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 1326 transitions. Word has length 36 [2021-04-15 03:20:39,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:20:39,962 INFO L480 AbstractCegarLoop]: Abstraction has 560 states and 1326 transitions. [2021-04-15 03:20:39,962 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:20:39,962 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 1326 transitions. [2021-04-15 03:20:39,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 03:20:39,963 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:20:39,963 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:20:39,963 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-04-15 03:20:39,963 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:20:39,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:20:39,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1614595956, now seen corresponding path program 19 times [2021-04-15 03:20:39,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:20:39,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847524899] [2021-04-15 03:20:39,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:20:39,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:20:39,971 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 03:20:39,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847524899] [2021-04-15 03:20:39,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 03:20:39,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-15 03:20:39,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971909668] [2021-04-15 03:20:39,972 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-04-15 03:20:39,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:20:39,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-04-15 03:20:39,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-15 03:20:39,972 INFO L87 Difference]: Start difference. First operand 560 states and 1326 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:20:39,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:20:39,976 INFO L93 Difference]: Finished difference Result 540 states and 1252 transitions. [2021-04-15 03:20:39,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-04-15 03:20:39,977 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 03:20:39,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:20:39,978 INFO L225 Difference]: With dead ends: 540 [2021-04-15 03:20:39,978 INFO L226 Difference]: Without dead ends: 530 [2021-04-15 03:20:39,978 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-15 03:20:39,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-04-15 03:20:39,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 530. [2021-04-15 03:20:39,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 529 states have (on average 2.325141776937618) internal successors, (1230), 529 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:20:39,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1230 transitions. [2021-04-15 03:20:39,987 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1230 transitions. Word has length 36 [2021-04-15 03:20:39,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:20:39,987 INFO L480 AbstractCegarLoop]: Abstraction has 530 states and 1230 transitions. [2021-04-15 03:20:39,988 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:20:39,988 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1230 transitions. [2021-04-15 03:20:39,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 03:20:39,989 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:20:39,989 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:20:39,989 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-04-15 03:20:39,989 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:20:39,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:20:39,989 INFO L82 PathProgramCache]: Analyzing trace with hash -886716842, now seen corresponding path program 20 times [2021-04-15 03:20:39,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:20:39,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251797427] [2021-04-15 03:20:39,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:20:39,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:20:40,017 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 03:20:40,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251797427] [2021-04-15 03:20:40,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 03:20:40,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 03:20:40,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260201699] [2021-04-15 03:20:40,017 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 03:20:40,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:20:40,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 03:20:40,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-04-15 03:20:40,018 INFO L87 Difference]: Start difference. First operand 530 states and 1230 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:20:40,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:20:40,137 INFO L93 Difference]: Finished difference Result 859 states and 1937 transitions. [2021-04-15 03:20:40,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 03:20:40,137 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 03:20:40,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:20:40,140 INFO L225 Difference]: With dead ends: 859 [2021-04-15 03:20:40,140 INFO L226 Difference]: Without dead ends: 742 [2021-04-15 03:20:40,140 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 62.8ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-04-15 03:20:40,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2021-04-15 03:20:40,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 521. [2021-04-15 03:20:40,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 520 states have (on average 2.3134615384615387) internal successors, (1203), 520 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:20:40,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 1203 transitions. [2021-04-15 03:20:40,151 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 1203 transitions. Word has length 36 [2021-04-15 03:20:40,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:20:40,151 INFO L480 AbstractCegarLoop]: Abstraction has 521 states and 1203 transitions. [2021-04-15 03:20:40,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:20:40,151 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 1203 transitions. [2021-04-15 03:20:40,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 03:20:40,152 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:20:40,152 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:20:40,152 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-04-15 03:20:40,153 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:20:40,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:20:40,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1889566906, now seen corresponding path program 21 times [2021-04-15 03:20:40,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:20:40,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037903343] [2021-04-15 03:20:40,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:20:40,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:20:40,189 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 03:20:40,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037903343] [2021-04-15 03:20:40,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 03:20:40,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-04-15 03:20:40,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002183212] [2021-04-15 03:20:40,189 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 03:20:40,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:20:40,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 03:20:40,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-04-15 03:20:40,190 INFO L87 Difference]: Start difference. First operand 521 states and 1203 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:20:40,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:20:40,333 INFO L93 Difference]: Finished difference Result 699 states and 1564 transitions. [2021-04-15 03:20:40,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 03:20:40,333 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 03:20:40,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:20:40,350 INFO L225 Difference]: With dead ends: 699 [2021-04-15 03:20:40,350 INFO L226 Difference]: Without dead ends: 598 [2021-04-15 03:20:40,350 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 77.3ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-04-15 03:20:40,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2021-04-15 03:20:40,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 434. [2021-04-15 03:20:40,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 2.325635103926097) internal successors, (1007), 433 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:20:40,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 1007 transitions. [2021-04-15 03:20:40,361 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 1007 transitions. Word has length 36 [2021-04-15 03:20:40,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:20:40,361 INFO L480 AbstractCegarLoop]: Abstraction has 434 states and 1007 transitions. [2021-04-15 03:20:40,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:20:40,361 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 1007 transitions. [2021-04-15 03:20:40,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 03:20:40,363 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:20:40,363 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:20:40,363 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-04-15 03:20:40,363 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:20:40,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:20:40,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1799608796, now seen corresponding path program 22 times [2021-04-15 03:20:40,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:20:40,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259484290] [2021-04-15 03:20:40,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:20:40,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:20:40,411 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 03:20:40,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259484290] [2021-04-15 03:20:40,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 03:20:40,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-04-15 03:20:40,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041504463] [2021-04-15 03:20:40,411 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 03:20:40,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:20:40,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 03:20:40,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-04-15 03:20:40,412 INFO L87 Difference]: Start difference. First operand 434 states and 1007 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:20:40,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:20:40,547 INFO L93 Difference]: Finished difference Result 598 states and 1372 transitions. [2021-04-15 03:20:40,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 03:20:40,547 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 03:20:40,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:20:40,549 INFO L225 Difference]: With dead ends: 598 [2021-04-15 03:20:40,549 INFO L226 Difference]: Without dead ends: 546 [2021-04-15 03:20:40,550 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 82.3ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-04-15 03:20:40,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-04-15 03:20:40,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 441. [2021-04-15 03:20:40,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 440 states have (on average 2.3227272727272728) internal successors, (1022), 440 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:20:40,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 1022 transitions. [2021-04-15 03:20:40,559 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 1022 transitions. Word has length 36 [2021-04-15 03:20:40,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:20:40,559 INFO L480 AbstractCegarLoop]: Abstraction has 441 states and 1022 transitions. [2021-04-15 03:20:40,559 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:20:40,559 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 1022 transitions. [2021-04-15 03:20:40,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 03:20:40,560 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:20:40,560 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:20:40,560 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-04-15 03:20:40,560 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:20:40,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:20:40,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1002873044, now seen corresponding path program 23 times [2021-04-15 03:20:40,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:20:40,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625651315] [2021-04-15 03:20:40,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:20:40,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:20:40,597 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 03:20:40,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625651315] [2021-04-15 03:20:40,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 03:20:40,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 03:20:40,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206434778] [2021-04-15 03:20:40,599 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 03:20:40,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:20:40,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 03:20:40,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-04-15 03:20:40,600 INFO L87 Difference]: Start difference. First operand 441 states and 1022 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:20:40,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:20:40,659 INFO L93 Difference]: Finished difference Result 542 states and 1249 transitions. [2021-04-15 03:20:40,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 03:20:40,659 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 03:20:40,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:20:40,660 INFO L225 Difference]: With dead ends: 542 [2021-04-15 03:20:40,660 INFO L226 Difference]: Without dead ends: 381 [2021-04-15 03:20:40,660 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 36.9ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-04-15 03:20:40,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-04-15 03:20:40,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 342. [2021-04-15 03:20:40,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 2.346041055718475) internal successors, (800), 341 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:20:40,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 800 transitions. [2021-04-15 03:20:40,667 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 800 transitions. Word has length 36 [2021-04-15 03:20:40,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:20:40,667 INFO L480 AbstractCegarLoop]: Abstraction has 342 states and 800 transitions. [2021-04-15 03:20:40,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:20:40,667 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 800 transitions. [2021-04-15 03:20:40,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 03:20:40,668 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:20:40,668 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:20:40,668 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-04-15 03:20:40,668 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:20:40,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:20:40,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1626416734, now seen corresponding path program 24 times [2021-04-15 03:20:40,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:20:40,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792240738] [2021-04-15 03:20:40,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:20:40,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:20:40,730 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 03:20:40,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792240738] [2021-04-15 03:20:40,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 03:20:40,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-04-15 03:20:40,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496723760] [2021-04-15 03:20:40,731 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 03:20:40,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:20:40,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 03:20:40,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-04-15 03:20:40,732 INFO L87 Difference]: Start difference. First operand 342 states and 800 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:20:40,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:20:40,811 INFO L93 Difference]: Finished difference Result 452 states and 1058 transitions. [2021-04-15 03:20:40,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 03:20:40,811 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 03:20:40,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:20:40,812 INFO L225 Difference]: With dead ends: 452 [2021-04-15 03:20:40,812 INFO L226 Difference]: Without dead ends: 432 [2021-04-15 03:20:40,812 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 84.9ms TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-04-15 03:20:40,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-04-15 03:20:40,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 377. [2021-04-15 03:20:40,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 2.3351063829787235) internal successors, (878), 376 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:20:40,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 878 transitions. [2021-04-15 03:20:40,820 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 878 transitions. Word has length 36 [2021-04-15 03:20:40,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:20:40,820 INFO L480 AbstractCegarLoop]: Abstraction has 377 states and 878 transitions. [2021-04-15 03:20:40,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:20:40,821 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 878 transitions. [2021-04-15 03:20:40,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 03:20:40,821 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:20:40,821 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:20:40,822 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-04-15 03:20:40,822 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:20:40,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:20:40,822 INFO L82 PathProgramCache]: Analyzing trace with hash 610360926, now seen corresponding path program 25 times [2021-04-15 03:20:40,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:20:40,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095981978] [2021-04-15 03:20:40,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:20:40,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:20:40,892 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 03:20:40,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095981978] [2021-04-15 03:20:40,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 03:20:40,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-04-15 03:20:40,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999237841] [2021-04-15 03:20:40,892 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 03:20:40,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:20:40,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 03:20:40,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-04-15 03:20:40,893 INFO L87 Difference]: Start difference. First operand 377 states and 878 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:20:40,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:20:40,967 INFO L93 Difference]: Finished difference Result 397 states and 914 transitions. [2021-04-15 03:20:40,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 03:20:40,967 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 03:20:40,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:20:40,968 INFO L225 Difference]: With dead ends: 397 [2021-04-15 03:20:40,968 INFO L226 Difference]: Without dead ends: 332 [2021-04-15 03:20:40,968 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 83.4ms TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-04-15 03:20:40,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-04-15 03:20:40,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 332. [2021-04-15 03:20:40,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 2.3323262839879155) internal successors, (772), 331 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:20:40,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 772 transitions. [2021-04-15 03:20:40,978 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 772 transitions. Word has length 36 [2021-04-15 03:20:40,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:20:40,978 INFO L480 AbstractCegarLoop]: Abstraction has 332 states and 772 transitions. [2021-04-15 03:20:40,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:20:40,978 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 772 transitions. [2021-04-15 03:20:40,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 03:20:40,979 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:20:40,979 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:20:40,979 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-04-15 03:20:40,979 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:20:40,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:20:40,979 INFO L82 PathProgramCache]: Analyzing trace with hash -777524160, now seen corresponding path program 26 times [2021-04-15 03:20:40,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:20:40,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421413851] [2021-04-15 03:20:40,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:20:40,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:20:41,043 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 03:20:41,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421413851] [2021-04-15 03:20:41,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 03:20:41,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-04-15 03:20:41,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425895191] [2021-04-15 03:20:41,044 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 03:20:41,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:20:41,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 03:20:41,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-04-15 03:20:41,045 INFO L87 Difference]: Start difference. First operand 332 states and 772 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:20:41,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:20:41,125 INFO L93 Difference]: Finished difference Result 472 states and 1099 transitions. [2021-04-15 03:20:41,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 03:20:41,127 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 03:20:41,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:20:41,128 INFO L225 Difference]: With dead ends: 472 [2021-04-15 03:20:41,128 INFO L226 Difference]: Without dead ends: 452 [2021-04-15 03:20:41,128 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 83.1ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-04-15 03:20:41,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-04-15 03:20:41,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 377. [2021-04-15 03:20:41,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 2.3218085106382977) internal successors, (873), 376 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:20:41,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 873 transitions. [2021-04-15 03:20:41,135 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 873 transitions. Word has length 36 [2021-04-15 03:20:41,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:20:41,135 INFO L480 AbstractCegarLoop]: Abstraction has 377 states and 873 transitions. [2021-04-15 03:20:41,135 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:20:41,135 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 873 transitions. [2021-04-15 03:20:41,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 03:20:41,136 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:20:41,136 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:20:41,136 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-04-15 03:20:41,136 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:20:41,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:20:41,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1793579968, now seen corresponding path program 27 times [2021-04-15 03:20:41,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:20:41,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548469358] [2021-04-15 03:20:41,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:20:41,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:20:41,196 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 03:20:41,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548469358] [2021-04-15 03:20:41,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 03:20:41,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-04-15 03:20:41,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481541695] [2021-04-15 03:20:41,197 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 03:20:41,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:20:41,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 03:20:41,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-04-15 03:20:41,197 INFO L87 Difference]: Start difference. First operand 377 states and 873 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:20:41,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:20:41,285 INFO L93 Difference]: Finished difference Result 397 states and 909 transitions. [2021-04-15 03:20:41,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 03:20:41,286 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 03:20:41,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:20:41,287 INFO L225 Difference]: With dead ends: 397 [2021-04-15 03:20:41,287 INFO L226 Difference]: Without dead ends: 327 [2021-04-15 03:20:41,287 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 96.1ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-04-15 03:20:41,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-04-15 03:20:41,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 327. [2021-04-15 03:20:41,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.3251533742331287) internal successors, (758), 326 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:20:41,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 758 transitions. [2021-04-15 03:20:41,292 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 758 transitions. Word has length 36 [2021-04-15 03:20:41,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:20:41,292 INFO L480 AbstractCegarLoop]: Abstraction has 327 states and 758 transitions. [2021-04-15 03:20:41,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:20:41,292 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 758 transitions. [2021-04-15 03:20:41,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 03:20:41,293 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:20:41,293 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:20:41,293 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-04-15 03:20:41,294 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:20:41,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:20:41,294 INFO L82 PathProgramCache]: Analyzing trace with hash -2007695822, now seen corresponding path program 28 times [2021-04-15 03:20:41,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:20:41,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112612560] [2021-04-15 03:20:41,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:20:41,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:20:41,326 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 03:20:41,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112612560] [2021-04-15 03:20:41,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 03:20:41,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-04-15 03:20:41,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507648099] [2021-04-15 03:20:41,327 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 03:20:41,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:20:41,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 03:20:41,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-04-15 03:20:41,328 INFO L87 Difference]: Start difference. First operand 327 states and 758 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:20:41,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:20:41,384 INFO L93 Difference]: Finished difference Result 189 states and 426 transitions. [2021-04-15 03:20:41,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 03:20:41,384 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 03:20:41,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:20:41,384 INFO L225 Difference]: With dead ends: 189 [2021-04-15 03:20:41,384 INFO L226 Difference]: Without dead ends: 0 [2021-04-15 03:20:41,385 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 52.8ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-04-15 03:20:41,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-04-15 03:20:41,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-04-15 03:20:41,385 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 03:20:41,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-04-15 03:20:41,385 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 36 [2021-04-15 03:20:41,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:20:41,385 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-04-15 03:20:41,385 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:20:41,385 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-04-15 03:20:41,385 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-04-15 03:20:41,386 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-04-15 03:20:41,391 INFO L202 PluginConnector]: Adding new model lamport.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.04 03:20:41 BasicIcfg [2021-04-15 03:20:41,391 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-04-15 03:20:41,391 INFO L168 Benchmark]: Toolchain (without parser) took 6228.27 ms. Allocated memory was 333.4 MB in the beginning and 417.3 MB in the end (delta: 83.9 MB). Free memory was 314.0 MB in the beginning and 398.1 MB in the end (delta: -84.1 MB). Peak memory consumption was 1.2 MB. Max. memory is 16.0 GB. [2021-04-15 03:20:41,392 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 333.4 MB. Free memory was 315.1 MB in the beginning and 315.1 MB in the end (delta: 83.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-04-15 03:20:41,392 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.91 ms. Allocated memory is still 333.4 MB. Free memory was 313.9 MB in the beginning and 312.4 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-04-15 03:20:41,393 INFO L168 Benchmark]: Boogie Preprocessor took 14.23 ms. Allocated memory is still 333.4 MB. Free memory was 312.4 MB in the beginning and 311.5 MB in the end (delta: 921.9 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-04-15 03:20:41,393 INFO L168 Benchmark]: RCFGBuilder took 222.93 ms. Allocated memory is still 333.4 MB. Free memory was 311.4 MB in the beginning and 299.2 MB in the end (delta: 12.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. [2021-04-15 03:20:41,393 INFO L168 Benchmark]: TraceAbstraction took 5957.79 ms. Allocated memory was 333.4 MB in the beginning and 417.3 MB in the end (delta: 83.9 MB). Free memory was 298.8 MB in the beginning and 398.1 MB in the end (delta: -99.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-04-15 03:20:41,393 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 333.4 MB. Free memory was 315.1 MB in the beginning and 315.1 MB in the end (delta: 83.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 26.91 ms. Allocated memory is still 333.4 MB. Free memory was 313.9 MB in the beginning and 312.4 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 14.23 ms. Allocated memory is still 333.4 MB. Free memory was 312.4 MB in the beginning and 311.5 MB in the end (delta: 921.9 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 222.93 ms. Allocated memory is still 333.4 MB. Free memory was 311.4 MB in the beginning and 299.2 MB in the end (delta: 12.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 5957.79 ms. Allocated memory was 333.4 MB in the beginning and 417.3 MB in the end (delta: 83.9 MB). Free memory was 298.8 MB in the beginning and 398.1 MB in the end (delta: -99.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 71]: 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 4 procedures, 42 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5862.1ms, OverallIterations: 28, TraceHistogramMax: 1, EmptinessCheckTime: 57.5ms, AutomataDifference: 3414.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 120.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2385 SDtfs, 3469 SDslu, 7940 SDs, 0 SdLazy, 2763 SolverSat, 396 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1182.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 397 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 329 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 2086.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=826occurred in iteration=3, InterpolantAutomatonStates: 325, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 450.2ms AutomataMinimizationTime, 28 MinimizatonAttempts, 6039 StatesRemovedByMinimization, 23 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 47.1ms SsaConstructionTime, 145.1ms SatisfiabilityAnalysisTime, 1365.3ms InterpolantComputationTime, 1008 NumberOfCodeBlocks, 1008 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 980 ConstructedInterpolants, 0 QuantifiedInterpolants, 3524 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 28 InterpolantComputations, 28 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...