/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/bench/exp2x4.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-05 21:40:03,104 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 21:40:03,106 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 21:40:03,134 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 21:40:03,181 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 [2021-06-05 21:40:03,208 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 21:40:03,208 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 21:40:03,208 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 21:40:03,208 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 21:40:03,210 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 21:40:03,210 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 21:40:03,210 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 21:40:03,211 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 21:40:03,211 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 21:40:03,211 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 21:40:03,211 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 21:40:03,211 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 21:40:03,212 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 21:40:03,212 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 21:40:03,212 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 21:40:03,212 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 21:40:03,212 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 21:40:03,212 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 21:40:03,212 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 21:40:03,212 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 21:40:03,212 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 21:40:03,212 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 21:40:03,212 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 21:40:03,212 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 21:40:03,213 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 21:40:03,213 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 21:40:03,213 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 21:40:03,213 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 21:40:03,213 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 21:40:03,213 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 21:40:03,213 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 21:40:03,213 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 21:40:03,472 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 21:40:03,500 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 21:40:03,501 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 21:40:03,502 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 21:40:03,503 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 21:40:03,503 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp2x4.wvr.bpl [2021-06-05 21:40:03,504 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp2x4.wvr.bpl' [2021-06-05 21:40:03,982 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 21:40:03,983 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 21:40:03,985 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 21:40:03,986 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 21:40:03,986 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 21:40:03,994 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:40:03" (1/1) ... [2021-06-05 21:40:03,999 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:40:03" (1/1) ... [2021-06-05 21:40:04,003 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 21:40:04,010 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 21:40:04,010 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 21:40:04,010 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 21:40:04,016 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:40:03" (1/1) ... [2021-06-05 21:40:04,016 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:40:03" (1/1) ... [2021-06-05 21:40:04,016 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:40:03" (1/1) ... [2021-06-05 21:40:04,017 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:40:03" (1/1) ... [2021-06-05 21:40:04,018 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:40:03" (1/1) ... [2021-06-05 21:40:04,020 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:40:03" (1/1) ... [2021-06-05 21:40:04,021 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:40:03" (1/1) ... [2021-06-05 21:40:04,022 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 21:40:04,023 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 21:40:04,023 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 21:40:04,023 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 21:40:04,025 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:40:03" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 21:40:04,070 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 21:40:04,070 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 21:40:04,070 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 21:40:04,071 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 21:40:04,071 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 21:40:04,071 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 21:40:04,071 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 21:40:04,071 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 21:40:04,071 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 21:40:04,071 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 21:40:04,071 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 21:40:04,071 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 21:40:04,071 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-06-05 21:40:04,072 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-06-05 21:40:04,072 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-06-05 21:40:04,072 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 21:40:04,305 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 21:40:04,306 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 21:40:04,307 INFO L202 PluginConnector]: Adding new model exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 09:40:04 BoogieIcfgContainer [2021-06-05 21:40:04,307 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 21:40:04,308 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 21:40:04,308 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 21:40:04,310 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 21:40:04,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:40:03" (1/2) ... [2021-06-05 21:40:04,311 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ba26d1e and model type exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 09:40:04, skipping insertion in model container [2021-06-05 21:40:04,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 09:40:04" (2/2) ... [2021-06-05 21:40:04,312 INFO L111 eAbstractionObserver]: Analyzing ICFG exp2x4.wvr.bpl [2021-06-05 21:40:04,316 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 21:40:04,316 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 21:40:04,316 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 21:40:04,317 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 21:40:04,413 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-06-05 21:40:04,430 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-06-05 21:40:04,470 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 21:40:04,470 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 21:40:04,470 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 21:40:04,470 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 21:40:04,471 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 21:40:04,471 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 21:40:04,471 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 21:40:04,471 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-05 21:40:04,483 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 46 places, 37 transitions, 106 flow [2021-06-05 21:40:04,548 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 942 states, 940 states have (on average 3.9117021276595745) internal successors, (3677), 941 states have internal predecessors, (3677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:04,553 INFO L276 IsEmpty]: Start isEmpty. Operand has 942 states, 940 states have (on average 3.9117021276595745) internal successors, (3677), 941 states have internal predecessors, (3677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:04,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:40:04,572 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:40:04,573 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:40:04,573 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:40:04,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:40:04,577 INFO L82 PathProgramCache]: Analyzing trace with hash 500910984, now seen corresponding path program 1 times [2021-06-05 21:40:04,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:40:04,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403686820] [2021-06-05 21:40:04,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:40:04,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:40:04,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:40:04,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:40:04,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403686820] [2021-06-05 21:40:04,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403686820] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:40:04,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:40:04,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 21:40:04,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834013412] [2021-06-05 21:40:04,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 21:40:04,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:40:04,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 21:40:04,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 21:40:04,742 INFO L87 Difference]: Start difference. First operand has 942 states, 940 states have (on average 3.9117021276595745) internal successors, (3677), 941 states have internal predecessors, (3677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:04,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:40:04,823 INFO L93 Difference]: Finished difference Result 1365 states and 5324 transitions. [2021-06-05 21:40:04,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 21:40:04,825 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:40:04,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:40:04,854 INFO L225 Difference]: With dead ends: 1365 [2021-06-05 21:40:04,854 INFO L226 Difference]: Without dead ends: 1334 [2021-06-05 21:40:04,855 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 21:40:04,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1334 states. [2021-06-05 21:40:04,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1334 to 1069. [2021-06-05 21:40:04,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1069 states, 1068 states have (on average 3.903558052434457) internal successors, (4169), 1068 states have internal predecessors, (4169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:04,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1069 states to 1069 states and 4169 transitions. [2021-06-05 21:40:04,965 INFO L78 Accepts]: Start accepts. Automaton has 1069 states and 4169 transitions. Word has length 19 [2021-06-05 21:40:04,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:40:04,966 INFO L482 AbstractCegarLoop]: Abstraction has 1069 states and 4169 transitions. [2021-06-05 21:40:04,966 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:04,967 INFO L276 IsEmpty]: Start isEmpty. Operand 1069 states and 4169 transitions. [2021-06-05 21:40:04,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:40:04,971 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:40:04,971 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:40:04,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 21:40:04,972 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:40:04,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:40:04,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1942329299, now seen corresponding path program 1 times [2021-06-05 21:40:04,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:40:04,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113417183] [2021-06-05 21:40:04,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:40:04,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:40:05,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:40:05,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:40:05,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113417183] [2021-06-05 21:40:05,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113417183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:05,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260269079] [2021-06-05 21:40:05,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:40:05,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:40:05,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 21:40:05,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:40:05,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:40:05,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260269079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:05,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:40:05,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-06-05 21:40:05,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852013916] [2021-06-05 21:40:05,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 21:40:05,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:40:05,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 21:40:05,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 21:40:05,208 INFO L87 Difference]: Start difference. First operand 1069 states and 4169 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:05,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:40:05,332 INFO L93 Difference]: Finished difference Result 2313 states and 8847 transitions. [2021-06-05 21:40:05,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 21:40:05,333 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:40:05,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:40:05,344 INFO L225 Difference]: With dead ends: 2313 [2021-06-05 21:40:05,345 INFO L226 Difference]: Without dead ends: 2313 [2021-06-05 21:40:05,345 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 21:40:05,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2313 states. [2021-06-05 21:40:05,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2313 to 1246. [2021-06-05 21:40:05,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1246 states, 1245 states have (on average 3.9710843373493976) internal successors, (4944), 1245 states have internal predecessors, (4944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:05,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 4944 transitions. [2021-06-05 21:40:05,398 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 4944 transitions. Word has length 22 [2021-06-05 21:40:05,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:40:05,398 INFO L482 AbstractCegarLoop]: Abstraction has 1246 states and 4944 transitions. [2021-06-05 21:40:05,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:05,399 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 4944 transitions. [2021-06-05 21:40:05,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:40:05,402 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:40:05,402 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:40:05,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-05 21:40:05,619 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:40:05,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:40:05,619 INFO L82 PathProgramCache]: Analyzing trace with hash -977644340, now seen corresponding path program 1 times [2021-06-05 21:40:05,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:40:05,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135768750] [2021-06-05 21:40:05,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:40:05,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:40:05,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:40:05,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:40:05,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135768750] [2021-06-05 21:40:05,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135768750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:05,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130829839] [2021-06-05 21:40:05,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:40:05,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:40:05,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 21:40:05,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:40:05,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:40:05,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130829839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:05,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:40:05,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-06-05 21:40:05,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786492260] [2021-06-05 21:40:05,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 21:40:05,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:40:05,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 21:40:05,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 21:40:05,794 INFO L87 Difference]: Start difference. First operand 1246 states and 4944 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:05,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:40:05,850 INFO L93 Difference]: Finished difference Result 2518 states and 9792 transitions. [2021-06-05 21:40:05,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 21:40:05,851 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:40:05,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:40:05,864 INFO L225 Difference]: With dead ends: 2518 [2021-06-05 21:40:05,864 INFO L226 Difference]: Without dead ends: 2518 [2021-06-05 21:40:05,864 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 21:40:05,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2518 states. [2021-06-05 21:40:05,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2518 to 1535. [2021-06-05 21:40:05,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1535 states, 1534 states have (on average 4.046284224250326) internal successors, (6207), 1534 states have internal predecessors, (6207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:05,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1535 states to 1535 states and 6207 transitions. [2021-06-05 21:40:05,915 INFO L78 Accepts]: Start accepts. Automaton has 1535 states and 6207 transitions. Word has length 22 [2021-06-05 21:40:05,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:40:05,915 INFO L482 AbstractCegarLoop]: Abstraction has 1535 states and 6207 transitions. [2021-06-05 21:40:05,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:05,916 INFO L276 IsEmpty]: Start isEmpty. Operand 1535 states and 6207 transitions. [2021-06-05 21:40:05,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:40:05,919 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:40:05,919 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:40:06,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:40:06,137 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:40:06,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:40:06,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1083698467, now seen corresponding path program 1 times [2021-06-05 21:40:06,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:40:06,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564718853] [2021-06-05 21:40:06,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:40:06,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:40:06,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:40:06,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:40:06,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564718853] [2021-06-05 21:40:06,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564718853] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:40:06,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:40:06,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 21:40:06,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266781107] [2021-06-05 21:40:06,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 21:40:06,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:40:06,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 21:40:06,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 21:40:06,158 INFO L87 Difference]: Start difference. First operand 1535 states and 6207 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:06,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:40:06,213 INFO L93 Difference]: Finished difference Result 2143 states and 8381 transitions. [2021-06-05 21:40:06,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 21:40:06,213 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:40:06,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:40:06,224 INFO L225 Difference]: With dead ends: 2143 [2021-06-05 21:40:06,224 INFO L226 Difference]: Without dead ends: 2120 [2021-06-05 21:40:06,225 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 21:40:06,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2120 states. [2021-06-05 21:40:06,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2120 to 1600. [2021-06-05 21:40:06,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1600 states, 1599 states have (on average 3.9987492182614135) internal successors, (6394), 1599 states have internal predecessors, (6394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:06,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1600 states to 1600 states and 6394 transitions. [2021-06-05 21:40:06,276 INFO L78 Accepts]: Start accepts. Automaton has 1600 states and 6394 transitions. Word has length 22 [2021-06-05 21:40:06,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:40:06,276 INFO L482 AbstractCegarLoop]: Abstraction has 1600 states and 6394 transitions. [2021-06-05 21:40:06,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:06,276 INFO L276 IsEmpty]: Start isEmpty. Operand 1600 states and 6394 transitions. [2021-06-05 21:40:06,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:40:06,280 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:40:06,280 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:40:06,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 21:40:06,280 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:40:06,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:40:06,281 INFO L82 PathProgramCache]: Analyzing trace with hash 269710136, now seen corresponding path program 1 times [2021-06-05 21:40:06,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:40:06,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951676174] [2021-06-05 21:40:06,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:40:06,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:40:06,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:40:06,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:40:06,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951676174] [2021-06-05 21:40:06,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951676174] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:40:06,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:40:06,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 21:40:06,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930956637] [2021-06-05 21:40:06,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 21:40:06,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:40:06,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 21:40:06,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 21:40:06,337 INFO L87 Difference]: Start difference. First operand 1600 states and 6394 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:06,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:40:06,392 INFO L93 Difference]: Finished difference Result 2353 states and 9126 transitions. [2021-06-05 21:40:06,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 21:40:06,392 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:40:06,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:40:06,403 INFO L225 Difference]: With dead ends: 2353 [2021-06-05 21:40:06,404 INFO L226 Difference]: Without dead ends: 2337 [2021-06-05 21:40:06,404 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 21:40:06,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2337 states. [2021-06-05 21:40:06,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2337 to 1670. [2021-06-05 21:40:06,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1670 states, 1669 states have (on average 3.9622528460155784) internal successors, (6613), 1669 states have internal predecessors, (6613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:06,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1670 states to 1670 states and 6613 transitions. [2021-06-05 21:40:06,450 INFO L78 Accepts]: Start accepts. Automaton has 1670 states and 6613 transitions. Word has length 22 [2021-06-05 21:40:06,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:40:06,450 INFO L482 AbstractCegarLoop]: Abstraction has 1670 states and 6613 transitions. [2021-06-05 21:40:06,450 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:06,450 INFO L276 IsEmpty]: Start isEmpty. Operand 1670 states and 6613 transitions. [2021-06-05 21:40:06,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:40:06,454 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:40:06,454 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:40:06,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 21:40:06,454 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:40:06,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:40:06,455 INFO L82 PathProgramCache]: Analyzing trace with hash 121894375, now seen corresponding path program 2 times [2021-06-05 21:40:06,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:40:06,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201095041] [2021-06-05 21:40:06,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:40:06,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:40:06,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:40:06,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:40:06,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201095041] [2021-06-05 21:40:06,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201095041] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:40:06,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:40:06,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 21:40:06,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819787996] [2021-06-05 21:40:06,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 21:40:06,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:40:06,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 21:40:06,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 21:40:06,485 INFO L87 Difference]: Start difference. First operand 1670 states and 6613 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:06,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:40:06,538 INFO L93 Difference]: Finished difference Result 2314 states and 9023 transitions. [2021-06-05 21:40:06,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 21:40:06,538 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:40:06,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:40:06,561 INFO L225 Difference]: With dead ends: 2314 [2021-06-05 21:40:06,561 INFO L226 Difference]: Without dead ends: 2314 [2021-06-05 21:40:06,561 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 21:40:06,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2314 states. [2021-06-05 21:40:06,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2314 to 1847. [2021-06-05 21:40:06,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1847 states, 1846 states have (on average 3.978331527627302) internal successors, (7344), 1846 states have internal predecessors, (7344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:06,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1847 states to 1847 states and 7344 transitions. [2021-06-05 21:40:06,611 INFO L78 Accepts]: Start accepts. Automaton has 1847 states and 7344 transitions. Word has length 22 [2021-06-05 21:40:06,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:40:06,611 INFO L482 AbstractCegarLoop]: Abstraction has 1847 states and 7344 transitions. [2021-06-05 21:40:06,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:06,611 INFO L276 IsEmpty]: Start isEmpty. Operand 1847 states and 7344 transitions. [2021-06-05 21:40:06,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:40:06,615 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:40:06,616 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:40:06,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 21:40:06,616 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:40:06,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:40:06,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1727272710, now seen corresponding path program 2 times [2021-06-05 21:40:06,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:40:06,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430400527] [2021-06-05 21:40:06,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:40:06,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:40:06,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:40:06,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:40:06,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430400527] [2021-06-05 21:40:06,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430400527] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:40:06,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:40:06,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 21:40:06,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993087959] [2021-06-05 21:40:06,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 21:40:06,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:40:06,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 21:40:06,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 21:40:06,660 INFO L87 Difference]: Start difference. First operand 1847 states and 7344 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:06,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:40:06,709 INFO L93 Difference]: Finished difference Result 2315 states and 8927 transitions. [2021-06-05 21:40:06,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 21:40:06,709 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:40:06,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:40:06,716 INFO L225 Difference]: With dead ends: 2315 [2021-06-05 21:40:06,716 INFO L226 Difference]: Without dead ends: 2297 [2021-06-05 21:40:06,717 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 21:40:06,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2297 states. [2021-06-05 21:40:06,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2297 to 1919. [2021-06-05 21:40:06,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1919 states, 1918 states have (on average 3.946298227320125) internal successors, (7569), 1918 states have internal predecessors, (7569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:06,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1919 states to 1919 states and 7569 transitions. [2021-06-05 21:40:06,776 INFO L78 Accepts]: Start accepts. Automaton has 1919 states and 7569 transitions. Word has length 22 [2021-06-05 21:40:06,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:40:06,776 INFO L482 AbstractCegarLoop]: Abstraction has 1919 states and 7569 transitions. [2021-06-05 21:40:06,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:06,777 INFO L276 IsEmpty]: Start isEmpty. Operand 1919 states and 7569 transitions. [2021-06-05 21:40:06,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:40:06,781 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:40:06,781 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:40:06,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 21:40:06,781 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:40:06,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:40:06,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1751500668, now seen corresponding path program 2 times [2021-06-05 21:40:06,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:40:06,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495431962] [2021-06-05 21:40:06,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:40:06,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:40:06,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:40:06,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:40:06,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495431962] [2021-06-05 21:40:06,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495431962] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:40:06,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:40:06,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 21:40:06,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397239463] [2021-06-05 21:40:06,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 21:40:06,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:40:06,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 21:40:06,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 21:40:06,818 INFO L87 Difference]: Start difference. First operand 1919 states and 7569 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:06,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:40:06,866 INFO L93 Difference]: Finished difference Result 2879 states and 11172 transitions. [2021-06-05 21:40:06,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 21:40:06,867 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:40:06,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:40:06,876 INFO L225 Difference]: With dead ends: 2879 [2021-06-05 21:40:06,876 INFO L226 Difference]: Without dead ends: 2879 [2021-06-05 21:40:06,876 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 21:40:06,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2879 states. [2021-06-05 21:40:06,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2879 to 2176. [2021-06-05 21:40:06,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2176 states, 2175 states have (on average 3.964137931034483) internal successors, (8622), 2175 states have internal predecessors, (8622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:06,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2176 states to 2176 states and 8622 transitions. [2021-06-05 21:40:06,965 INFO L78 Accepts]: Start accepts. Automaton has 2176 states and 8622 transitions. Word has length 22 [2021-06-05 21:40:06,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:40:06,966 INFO L482 AbstractCegarLoop]: Abstraction has 2176 states and 8622 transitions. [2021-06-05 21:40:06,966 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:06,966 INFO L276 IsEmpty]: Start isEmpty. Operand 2176 states and 8622 transitions. [2021-06-05 21:40:06,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:40:06,971 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:40:06,971 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:40:06,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-05 21:40:06,971 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:40:06,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:40:06,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1947070755, now seen corresponding path program 2 times [2021-06-05 21:40:06,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:40:06,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251247238] [2021-06-05 21:40:06,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:40:06,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:40:06,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:40:06,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:40:06,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251247238] [2021-06-05 21:40:06,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251247238] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:40:06,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:40:06,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 21:40:06,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401001404] [2021-06-05 21:40:06,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 21:40:06,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:40:06,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 21:40:06,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 21:40:06,997 INFO L87 Difference]: Start difference. First operand 2176 states and 8622 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:07,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:40:07,052 INFO L93 Difference]: Finished difference Result 2839 states and 10862 transitions. [2021-06-05 21:40:07,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 21:40:07,053 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:40:07,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:40:07,060 INFO L225 Difference]: With dead ends: 2839 [2021-06-05 21:40:07,061 INFO L226 Difference]: Without dead ends: 2811 [2021-06-05 21:40:07,061 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 21:40:07,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2811 states. [2021-06-05 21:40:07,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2811 to 2291. [2021-06-05 21:40:07,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2291 states, 2290 states have (on average 3.9375545851528386) internal successors, (9017), 2290 states have internal predecessors, (9017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:07,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2291 states to 2291 states and 9017 transitions. [2021-06-05 21:40:07,123 INFO L78 Accepts]: Start accepts. Automaton has 2291 states and 9017 transitions. Word has length 22 [2021-06-05 21:40:07,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:40:07,124 INFO L482 AbstractCegarLoop]: Abstraction has 2291 states and 9017 transitions. [2021-06-05 21:40:07,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:07,124 INFO L276 IsEmpty]: Start isEmpty. Operand 2291 states and 9017 transitions. [2021-06-05 21:40:07,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:40:07,130 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:40:07,130 INFO L554 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] [2021-06-05 21:40:07,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-05 21:40:07,131 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:40:07,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:40:07,131 INFO L82 PathProgramCache]: Analyzing trace with hash 509204595, now seen corresponding path program 1 times [2021-06-05 21:40:07,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:40:07,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314749063] [2021-06-05 21:40:07,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:40:07,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:40:07,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:40:07,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:40:07,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314749063] [2021-06-05 21:40:07,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314749063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:07,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384397090] [2021-06-05 21:40:07,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:40:07,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:40:07,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:40:07,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:40:07,468 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:40:07,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384397090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:07,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:40:07,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 6 [2021-06-05 21:40:07,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49641886] [2021-06-05 21:40:07,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:40:07,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:40:07,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:40:07,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:40:07,470 INFO L87 Difference]: Start difference. First operand 2291 states and 9017 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:07,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:40:07,651 INFO L93 Difference]: Finished difference Result 3791 states and 14505 transitions. [2021-06-05 21:40:07,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:40:07,651 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:40:07,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:40:07,661 INFO L225 Difference]: With dead ends: 3791 [2021-06-05 21:40:07,662 INFO L226 Difference]: Without dead ends: 3655 [2021-06-05 21:40:07,662 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 69.2ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:40:07,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3655 states. [2021-06-05 21:40:07,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3655 to 2656. [2021-06-05 21:40:07,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2656 states, 2655 states have (on average 3.9450094161958567) internal successors, (10474), 2655 states have internal predecessors, (10474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:07,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2656 states to 2656 states and 10474 transitions. [2021-06-05 21:40:07,726 INFO L78 Accepts]: Start accepts. Automaton has 2656 states and 10474 transitions. Word has length 25 [2021-06-05 21:40:07,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:40:07,726 INFO L482 AbstractCegarLoop]: Abstraction has 2656 states and 10474 transitions. [2021-06-05 21:40:07,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:07,726 INFO L276 IsEmpty]: Start isEmpty. Operand 2656 states and 10474 transitions. [2021-06-05 21:40:07,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:40:07,732 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:40:07,732 INFO L554 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] [2021-06-05 21:40:07,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 21:40:07,949 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:40:07,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:40:07,949 INFO L82 PathProgramCache]: Analyzing trace with hash 805897905, now seen corresponding path program 2 times [2021-06-05 21:40:07,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:40:07,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665719210] [2021-06-05 21:40:07,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:40:07,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:40:08,040 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:40:08,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:40:08,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665719210] [2021-06-05 21:40:08,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665719210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:08,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658096243] [2021-06-05 21:40:08,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:40:08,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:40:08,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:40:08,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:40:08,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:40:08,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:40:08,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658096243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:08,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:40:08,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 7 [2021-06-05 21:40:08,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343027231] [2021-06-05 21:40:08,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:40:08,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:40:08,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:40:08,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:40:08,339 INFO L87 Difference]: Start difference. First operand 2656 states and 10474 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:08,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:40:08,603 INFO L93 Difference]: Finished difference Result 4004 states and 15422 transitions. [2021-06-05 21:40:08,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:40:08,603 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:40:08,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:40:08,615 INFO L225 Difference]: With dead ends: 4004 [2021-06-05 21:40:08,615 INFO L226 Difference]: Without dead ends: 3868 [2021-06-05 21:40:08,615 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 96.5ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:40:08,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3868 states. [2021-06-05 21:40:08,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3868 to 2991. [2021-06-05 21:40:08,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2991 states, 2990 states have (on average 3.9638795986622073) internal successors, (11852), 2990 states have internal predecessors, (11852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:08,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2991 states to 2991 states and 11852 transitions. [2021-06-05 21:40:08,680 INFO L78 Accepts]: Start accepts. Automaton has 2991 states and 11852 transitions. Word has length 25 [2021-06-05 21:40:08,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:40:08,680 INFO L482 AbstractCegarLoop]: Abstraction has 2991 states and 11852 transitions. [2021-06-05 21:40:08,680 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:08,681 INFO L276 IsEmpty]: Start isEmpty. Operand 2991 states and 11852 transitions. [2021-06-05 21:40:08,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:40:08,687 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:40:08,687 INFO L554 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] [2021-06-05 21:40:08,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:40:08,903 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:40:08,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:40:08,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1407841221, now seen corresponding path program 3 times [2021-06-05 21:40:08,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:40:08,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641993296] [2021-06-05 21:40:08,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:40:08,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:40:08,952 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:40:08,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:40:08,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641993296] [2021-06-05 21:40:08,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641993296] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:40:08,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:40:08,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 21:40:08,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250087822] [2021-06-05 21:40:08,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 21:40:08,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:40:08,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 21:40:08,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 21:40:08,954 INFO L87 Difference]: Start difference. First operand 2991 states and 11852 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:09,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:40:09,051 INFO L93 Difference]: Finished difference Result 4207 states and 16326 transitions. [2021-06-05 21:40:09,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 21:40:09,052 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:40:09,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:40:09,063 INFO L225 Difference]: With dead ends: 4207 [2021-06-05 21:40:09,063 INFO L226 Difference]: Without dead ends: 4139 [2021-06-05 21:40:09,064 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.6ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 21:40:09,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4139 states. [2021-06-05 21:40:09,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4139 to 3438. [2021-06-05 21:40:09,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3438 states, 3437 states have (on average 3.9793424498108814) internal successors, (13677), 3437 states have internal predecessors, (13677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:09,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3438 states to 3438 states and 13677 transitions. [2021-06-05 21:40:09,135 INFO L78 Accepts]: Start accepts. Automaton has 3438 states and 13677 transitions. Word has length 25 [2021-06-05 21:40:09,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:40:09,135 INFO L482 AbstractCegarLoop]: Abstraction has 3438 states and 13677 transitions. [2021-06-05 21:40:09,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:09,135 INFO L276 IsEmpty]: Start isEmpty. Operand 3438 states and 13677 transitions. [2021-06-05 21:40:09,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:40:09,145 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:40:09,145 INFO L554 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] [2021-06-05 21:40:09,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-06-05 21:40:09,145 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:40:09,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:40:09,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1668338337, now seen corresponding path program 1 times [2021-06-05 21:40:09,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:40:09,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128631953] [2021-06-05 21:40:09,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:40:09,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:40:09,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:40:09,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:40:09,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128631953] [2021-06-05 21:40:09,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128631953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:09,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772627427] [2021-06-05 21:40:09,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:40:09,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:40:09,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:40:09,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:40:09,324 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:40:09,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772627427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:09,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:40:09,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 6 [2021-06-05 21:40:09,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434831246] [2021-06-05 21:40:09,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:40:09,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:40:09,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:40:09,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:40:09,326 INFO L87 Difference]: Start difference. First operand 3438 states and 13677 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:09,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:40:09,507 INFO L93 Difference]: Finished difference Result 4729 states and 18310 transitions. [2021-06-05 21:40:09,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:40:09,507 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:40:09,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:40:09,520 INFO L225 Difference]: With dead ends: 4729 [2021-06-05 21:40:09,520 INFO L226 Difference]: Without dead ends: 4627 [2021-06-05 21:40:09,521 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 45.0ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:40:09,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4627 states. [2021-06-05 21:40:09,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4627 to 3870. [2021-06-05 21:40:09,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3870 states, 3869 states have (on average 3.958904109589041) internal successors, (15317), 3869 states have internal predecessors, (15317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:09,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3870 states to 3870 states and 15317 transitions. [2021-06-05 21:40:09,612 INFO L78 Accepts]: Start accepts. Automaton has 3870 states and 15317 transitions. Word has length 25 [2021-06-05 21:40:09,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:40:09,612 INFO L482 AbstractCegarLoop]: Abstraction has 3870 states and 15317 transitions. [2021-06-05 21:40:09,612 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:09,612 INFO L276 IsEmpty]: Start isEmpty. Operand 3870 states and 15317 transitions. [2021-06-05 21:40:09,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:40:09,619 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:40:09,619 INFO L554 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] [2021-06-05 21:40:09,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-06-05 21:40:09,833 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:40:09,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:40:09,833 INFO L82 PathProgramCache]: Analyzing trace with hash -2074425317, now seen corresponding path program 2 times [2021-06-05 21:40:09,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:40:09,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97219409] [2021-06-05 21:40:09,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:40:09,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:40:09,955 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:40:09,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:40:09,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97219409] [2021-06-05 21:40:09,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97219409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:09,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493092248] [2021-06-05 21:40:09,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:40:09,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:40:09,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:40:09,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:40:09,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:40:10,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:40:10,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493092248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:10,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:40:10,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 7 [2021-06-05 21:40:10,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072496132] [2021-06-05 21:40:10,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:40:10,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:40:10,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:40:10,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:40:10,120 INFO L87 Difference]: Start difference. First operand 3870 states and 15317 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:10,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:40:10,324 INFO L93 Difference]: Finished difference Result 4946 states and 19222 transitions. [2021-06-05 21:40:10,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:40:10,325 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:40:10,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:40:10,345 INFO L225 Difference]: With dead ends: 4946 [2021-06-05 21:40:10,345 INFO L226 Difference]: Without dead ends: 4844 [2021-06-05 21:40:10,345 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 116.9ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:40:10,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4844 states. [2021-06-05 21:40:10,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4844 to 4195. [2021-06-05 21:40:10,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4195 states, 4194 states have (on average 3.966618979494516) internal successors, (16636), 4194 states have internal predecessors, (16636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:10,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4195 states to 4195 states and 16636 transitions. [2021-06-05 21:40:10,435 INFO L78 Accepts]: Start accepts. Automaton has 4195 states and 16636 transitions. Word has length 25 [2021-06-05 21:40:10,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:40:10,436 INFO L482 AbstractCegarLoop]: Abstraction has 4195 states and 16636 transitions. [2021-06-05 21:40:10,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:10,436 INFO L276 IsEmpty]: Start isEmpty. Operand 4195 states and 16636 transitions. [2021-06-05 21:40:10,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:40:10,445 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:40:10,445 INFO L554 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] [2021-06-05 21:40:10,662 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:40:10,663 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:40:10,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:40:10,663 INFO L82 PathProgramCache]: Analyzing trace with hash -256616277, now seen corresponding path program 3 times [2021-06-05 21:40:10,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:40:10,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726280049] [2021-06-05 21:40:10,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:40:10,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:40:10,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:40:10,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:40:10,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726280049] [2021-06-05 21:40:10,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726280049] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:40:10,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:40:10,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 21:40:10,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628592831] [2021-06-05 21:40:10,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 21:40:10,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:40:10,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 21:40:10,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 21:40:10,699 INFO L87 Difference]: Start difference. First operand 4195 states and 16636 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:10,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:40:10,832 INFO L93 Difference]: Finished difference Result 5169 states and 20167 transitions. [2021-06-05 21:40:10,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 21:40:10,832 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:40:10,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:40:10,850 INFO L225 Difference]: With dead ends: 5169 [2021-06-05 21:40:10,851 INFO L226 Difference]: Without dead ends: 5118 [2021-06-05 21:40:10,860 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.9ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 21:40:10,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5118 states. [2021-06-05 21:40:10,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5118 to 4611. [2021-06-05 21:40:10,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4611 states, 4610 states have (on average 3.9731019522776574) internal successors, (18316), 4610 states have internal predecessors, (18316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:10,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4611 states to 4611 states and 18316 transitions. [2021-06-05 21:40:10,959 INFO L78 Accepts]: Start accepts. Automaton has 4611 states and 18316 transitions. Word has length 25 [2021-06-05 21:40:10,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:40:10,959 INFO L482 AbstractCegarLoop]: Abstraction has 4611 states and 18316 transitions. [2021-06-05 21:40:10,959 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:10,959 INFO L276 IsEmpty]: Start isEmpty. Operand 4611 states and 18316 transitions. [2021-06-05 21:40:10,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 21:40:10,969 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:40:10,969 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:40:10,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-06-05 21:40:10,969 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:40:10,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:40:10,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1347954008, now seen corresponding path program 4 times [2021-06-05 21:40:10,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:40:10,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896159385] [2021-06-05 21:40:10,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:40:10,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:40:11,012 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:40:11,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:40:11,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896159385] [2021-06-05 21:40:11,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896159385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:11,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913215900] [2021-06-05 21:40:11,013 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:40:11,072 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:40:11,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:40:11,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:40:11,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:40:11,158 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:40:11,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913215900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:11,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:40:11,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 21:40:11,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342765257] [2021-06-05 21:40:11,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:40:11,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:40:11,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:40:11,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:40:11,159 INFO L87 Difference]: Start difference. First operand 4611 states and 18316 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:12,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:40:12,013 INFO L93 Difference]: Finished difference Result 11402 states and 44327 transitions. [2021-06-05 21:40:12,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 21:40:12,014 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 21:40:12,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:40:12,044 INFO L225 Difference]: With dead ends: 11402 [2021-06-05 21:40:12,044 INFO L226 Difference]: Without dead ends: 11402 [2021-06-05 21:40:12,045 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 322.1ms TimeCoverageRelationStatistics Valid=267, Invalid=923, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 21:40:12,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11402 states. [2021-06-05 21:40:12,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11402 to 5821. [2021-06-05 21:40:12,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5821 states, 5820 states have (on average 4.016151202749141) internal successors, (23374), 5820 states have internal predecessors, (23374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:12,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5821 states to 5821 states and 23374 transitions. [2021-06-05 21:40:12,230 INFO L78 Accepts]: Start accepts. Automaton has 5821 states and 23374 transitions. Word has length 28 [2021-06-05 21:40:12,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:40:12,230 INFO L482 AbstractCegarLoop]: Abstraction has 5821 states and 23374 transitions. [2021-06-05 21:40:12,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:12,231 INFO L276 IsEmpty]: Start isEmpty. Operand 5821 states and 23374 transitions. [2021-06-05 21:40:12,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 21:40:12,243 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:40:12,243 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:40:12,457 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 21:40:12,457 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:40:12,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:40:12,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1763427731, now seen corresponding path program 5 times [2021-06-05 21:40:12,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:40:12,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549067517] [2021-06-05 21:40:12,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:40:12,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:40:12,492 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:40:12,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:40:12,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549067517] [2021-06-05 21:40:12,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549067517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:12,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090910427] [2021-06-05 21:40:12,492 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:40:12,525 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:40:12,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:40:12,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:40:12,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:40:12,605 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:40:12,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090910427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:12,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:40:12,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 21:40:12,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932120737] [2021-06-05 21:40:12,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:40:12,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:40:12,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:40:12,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:40:12,608 INFO L87 Difference]: Start difference. First operand 5821 states and 23374 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:13,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:40:13,299 INFO L93 Difference]: Finished difference Result 15383 states and 58771 transitions. [2021-06-05 21:40:13,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 21:40:13,299 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 21:40:13,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:40:13,336 INFO L225 Difference]: With dead ends: 15383 [2021-06-05 21:40:13,337 INFO L226 Difference]: Without dead ends: 15203 [2021-06-05 21:40:13,337 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 303.3ms TimeCoverageRelationStatistics Valid=229, Invalid=827, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:40:13,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15203 states. [2021-06-05 21:40:13,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15203 to 8319. [2021-06-05 21:40:13,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8319 states, 8318 states have (on average 4.118177446501563) internal successors, (34255), 8318 states have internal predecessors, (34255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:13,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8319 states to 8319 states and 34255 transitions. [2021-06-05 21:40:13,623 INFO L78 Accepts]: Start accepts. Automaton has 8319 states and 34255 transitions. Word has length 28 [2021-06-05 21:40:13,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:40:13,623 INFO L482 AbstractCegarLoop]: Abstraction has 8319 states and 34255 transitions. [2021-06-05 21:40:13,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:13,623 INFO L276 IsEmpty]: Start isEmpty. Operand 8319 states and 34255 transitions. [2021-06-05 21:40:13,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 21:40:13,640 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:40:13,641 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:40:13,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 21:40:13,857 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:40:13,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:40:13,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1546556397, now seen corresponding path program 6 times [2021-06-05 21:40:13,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:40:13,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670334807] [2021-06-05 21:40:13,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:40:13,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:40:13,887 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:40:13,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:40:13,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670334807] [2021-06-05 21:40:13,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670334807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:13,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681225758] [2021-06-05 21:40:13,887 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:40:13,921 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:40:13,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:40:13,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:40:13,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:40:14,056 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:40:14,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681225758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:14,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:40:14,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-06-05 21:40:14,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005512446] [2021-06-05 21:40:14,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:40:14,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:40:14,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:40:14,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:40:14,058 INFO L87 Difference]: Start difference. First operand 8319 states and 34255 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:14,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:40:14,492 INFO L93 Difference]: Finished difference Result 16184 states and 62633 transitions. [2021-06-05 21:40:14,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:40:14,493 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 21:40:14,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:40:14,531 INFO L225 Difference]: With dead ends: 16184 [2021-06-05 21:40:14,531 INFO L226 Difference]: Without dead ends: 16184 [2021-06-05 21:40:14,532 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 179.2ms TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:40:14,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16184 states. [2021-06-05 21:40:14,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16184 to 8319. [2021-06-05 21:40:14,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8319 states, 8318 states have (on average 4.099062274585237) internal successors, (34096), 8318 states have internal predecessors, (34096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:14,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8319 states to 8319 states and 34096 transitions. [2021-06-05 21:40:14,872 INFO L78 Accepts]: Start accepts. Automaton has 8319 states and 34096 transitions. Word has length 28 [2021-06-05 21:40:14,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:40:14,873 INFO L482 AbstractCegarLoop]: Abstraction has 8319 states and 34096 transitions. [2021-06-05 21:40:14,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:14,873 INFO L276 IsEmpty]: Start isEmpty. Operand 8319 states and 34096 transitions. [2021-06-05 21:40:14,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 21:40:14,893 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:40:14,893 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:40:15,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 21:40:15,101 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:40:15,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:40:15,101 INFO L82 PathProgramCache]: Analyzing trace with hash 2142952270, now seen corresponding path program 7 times [2021-06-05 21:40:15,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:40:15,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306918977] [2021-06-05 21:40:15,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:40:15,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:40:15,134 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:40:15,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:40:15,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306918977] [2021-06-05 21:40:15,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306918977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:15,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369288489] [2021-06-05 21:40:15,134 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:40:15,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:40:15,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:40:15,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:40:15,267 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:40:15,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369288489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:15,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:40:15,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-06-05 21:40:15,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969117182] [2021-06-05 21:40:15,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:40:15,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:40:15,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:40:15,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:40:15,269 INFO L87 Difference]: Start difference. First operand 8319 states and 34096 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:15,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:40:15,553 INFO L93 Difference]: Finished difference Result 10083 states and 39959 transitions. [2021-06-05 21:40:15,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:40:15,553 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 21:40:15,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:40:15,578 INFO L225 Difference]: With dead ends: 10083 [2021-06-05 21:40:15,579 INFO L226 Difference]: Without dead ends: 10027 [2021-06-05 21:40:15,579 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 113.4ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:40:15,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10027 states. [2021-06-05 21:40:15,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10027 to 8326. [2021-06-05 21:40:15,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8326 states, 8325 states have (on average 4.095975975975976) internal successors, (34099), 8325 states have internal predecessors, (34099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:15,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8326 states to 8326 states and 34099 transitions. [2021-06-05 21:40:15,819 INFO L78 Accepts]: Start accepts. Automaton has 8326 states and 34099 transitions. Word has length 28 [2021-06-05 21:40:15,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:40:15,819 INFO L482 AbstractCegarLoop]: Abstraction has 8326 states and 34099 transitions. [2021-06-05 21:40:15,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:15,819 INFO L276 IsEmpty]: Start isEmpty. Operand 8326 states and 34099 transitions. [2021-06-05 21:40:15,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 21:40:15,835 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:40:15,835 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:40:16,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:40:16,035 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:40:16,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:40:16,036 INFO L82 PathProgramCache]: Analyzing trace with hash -270034728, now seen corresponding path program 8 times [2021-06-05 21:40:16,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:40:16,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544783729] [2021-06-05 21:40:16,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:40:16,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:40:16,055 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:40:16,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:40:16,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544783729] [2021-06-05 21:40:16,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544783729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:16,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058162376] [2021-06-05 21:40:16,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:40:16,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:40:16,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:40:16,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:40:16,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:40:16,293 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:40:16,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058162376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:16,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:40:16,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 9 [2021-06-05 21:40:16,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561572307] [2021-06-05 21:40:16,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:40:16,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:40:16,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:40:16,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:40:16,294 INFO L87 Difference]: Start difference. First operand 8326 states and 34099 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:16,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:40:16,845 INFO L93 Difference]: Finished difference Result 17529 states and 67736 transitions. [2021-06-05 21:40:16,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:40:16,846 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 21:40:16,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:40:16,885 INFO L225 Difference]: With dead ends: 17529 [2021-06-05 21:40:16,885 INFO L226 Difference]: Without dead ends: 17529 [2021-06-05 21:40:16,885 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 140.8ms TimeCoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:40:16,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17529 states. [2021-06-05 21:40:17,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17529 to 8432. [2021-06-05 21:40:17,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8432 states, 8431 states have (on average 4.087296880559839) internal successors, (34460), 8431 states have internal predecessors, (34460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:17,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8432 states to 8432 states and 34460 transitions. [2021-06-05 21:40:17,209 INFO L78 Accepts]: Start accepts. Automaton has 8432 states and 34460 transitions. Word has length 28 [2021-06-05 21:40:17,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:40:17,209 INFO L482 AbstractCegarLoop]: Abstraction has 8432 states and 34460 transitions. [2021-06-05 21:40:17,209 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:17,209 INFO L276 IsEmpty]: Start isEmpty. Operand 8432 states and 34460 transitions. [2021-06-05 21:40:17,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 21:40:17,225 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:40:17,225 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:40:17,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:40:17,426 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:40:17,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:40:17,427 INFO L82 PathProgramCache]: Analyzing trace with hash -2015724689, now seen corresponding path program 9 times [2021-06-05 21:40:17,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:40:17,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366878842] [2021-06-05 21:40:17,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:40:17,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:40:17,500 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:40:17,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:40:17,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366878842] [2021-06-05 21:40:17,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366878842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:17,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098608719] [2021-06-05 21:40:17,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:40:17,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 21:40:17,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:40:17,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:40:17,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:40:17,683 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:40:17,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098608719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:17,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:40:17,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 9 [2021-06-05 21:40:17,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506309913] [2021-06-05 21:40:17,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:40:17,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:40:17,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:40:17,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:40:17,685 INFO L87 Difference]: Start difference. First operand 8432 states and 34460 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:18,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:40:18,216 INFO L93 Difference]: Finished difference Result 15647 states and 60285 transitions. [2021-06-05 21:40:18,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:40:18,217 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 21:40:18,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:40:18,261 INFO L225 Difference]: With dead ends: 15647 [2021-06-05 21:40:18,261 INFO L226 Difference]: Without dead ends: 15587 [2021-06-05 21:40:18,262 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 168.3ms TimeCoverageRelationStatistics Valid=144, Invalid=456, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:40:18,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15587 states. [2021-06-05 21:40:18,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15587 to 8432. [2021-06-05 21:40:18,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8432 states, 8431 states have (on average 4.084924682718539) internal successors, (34440), 8431 states have internal predecessors, (34440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:18,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8432 states to 8432 states and 34440 transitions. [2021-06-05 21:40:18,506 INFO L78 Accepts]: Start accepts. Automaton has 8432 states and 34440 transitions. Word has length 28 [2021-06-05 21:40:18,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:40:18,506 INFO L482 AbstractCegarLoop]: Abstraction has 8432 states and 34440 transitions. [2021-06-05 21:40:18,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:18,506 INFO L276 IsEmpty]: Start isEmpty. Operand 8432 states and 34440 transitions. [2021-06-05 21:40:18,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 21:40:18,521 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:40:18,521 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:40:18,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:40:18,725 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:40:18,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:40:18,726 INFO L82 PathProgramCache]: Analyzing trace with hash 946388915, now seen corresponding path program 10 times [2021-06-05 21:40:18,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:40:18,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211902545] [2021-06-05 21:40:18,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:40:18,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:40:18,814 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:40:18,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:40:18,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211902545] [2021-06-05 21:40:18,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211902545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:18,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829457780] [2021-06-05 21:40:18,814 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:40:18,840 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:40:18,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:40:18,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:40:18,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:40:18,916 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:40:18,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829457780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:18,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:40:18,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 9 [2021-06-05 21:40:18,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888041016] [2021-06-05 21:40:18,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:40:18,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:40:18,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:40:18,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:40:18,917 INFO L87 Difference]: Start difference. First operand 8432 states and 34440 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:19,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:40:19,489 INFO L93 Difference]: Finished difference Result 18798 states and 72632 transitions. [2021-06-05 21:40:19,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:40:19,490 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 21:40:19,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:40:19,538 INFO L225 Difference]: With dead ends: 18798 [2021-06-05 21:40:19,538 INFO L226 Difference]: Without dead ends: 18798 [2021-06-05 21:40:19,539 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 180.8ms TimeCoverageRelationStatistics Valid=184, Invalid=572, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:40:19,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18798 states. [2021-06-05 21:40:19,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18798 to 8538. [2021-06-05 21:40:19,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8538 states, 8537 states have (on average 4.08269884034204) internal successors, (34854), 8537 states have internal predecessors, (34854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:19,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8538 states to 8538 states and 34854 transitions. [2021-06-05 21:40:19,880 INFO L78 Accepts]: Start accepts. Automaton has 8538 states and 34854 transitions. Word has length 28 [2021-06-05 21:40:19,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:40:19,880 INFO L482 AbstractCegarLoop]: Abstraction has 8538 states and 34854 transitions. [2021-06-05 21:40:19,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:19,881 INFO L276 IsEmpty]: Start isEmpty. Operand 8538 states and 34854 transitions. [2021-06-05 21:40:19,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 21:40:19,895 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:40:19,895 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:40:20,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-05 21:40:20,096 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:40:20,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:40:20,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1542784788, now seen corresponding path program 11 times [2021-06-05 21:40:20,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:40:20,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465342447] [2021-06-05 21:40:20,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:40:20,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:40:20,118 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:40:20,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:40:20,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465342447] [2021-06-05 21:40:20,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465342447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:20,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286918068] [2021-06-05 21:40:20,118 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:40:20,144 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:40:20,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:40:20,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:40:20,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:40:20,232 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:40:20,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286918068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:20,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:40:20,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 9 [2021-06-05 21:40:20,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942126086] [2021-06-05 21:40:20,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:40:20,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:40:20,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:40:20,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:40:20,233 INFO L87 Difference]: Start difference. First operand 8538 states and 34854 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:20,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:40:20,681 INFO L93 Difference]: Finished difference Result 14070 states and 54143 transitions. [2021-06-05 21:40:20,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:40:20,681 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 21:40:20,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:40:20,776 INFO L225 Difference]: With dead ends: 14070 [2021-06-05 21:40:20,776 INFO L226 Difference]: Without dead ends: 14014 [2021-06-05 21:40:20,776 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 138.8ms TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:40:20,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14014 states. [2021-06-05 21:40:20,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14014 to 8538. [2021-06-05 21:40:20,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8538 states, 8537 states have (on average 4.080356096989575) internal successors, (34834), 8537 states have internal predecessors, (34834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:20,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8538 states to 8538 states and 34834 transitions. [2021-06-05 21:40:20,972 INFO L78 Accepts]: Start accepts. Automaton has 8538 states and 34834 transitions. Word has length 28 [2021-06-05 21:40:20,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:40:20,973 INFO L482 AbstractCegarLoop]: Abstraction has 8538 states and 34834 transitions. [2021-06-05 21:40:20,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:20,973 INFO L276 IsEmpty]: Start isEmpty. Operand 8538 states and 34834 transitions. [2021-06-05 21:40:20,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 21:40:20,987 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:40:20,987 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:40:21,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:40:21,201 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:40:21,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:40:21,201 INFO L82 PathProgramCache]: Analyzing trace with hash 477986465, now seen corresponding path program 12 times [2021-06-05 21:40:21,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:40:21,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446991426] [2021-06-05 21:40:21,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:40:21,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:40:21,223 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:40:21,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:40:21,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446991426] [2021-06-05 21:40:21,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446991426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:21,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321249464] [2021-06-05 21:40:21,223 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:40:21,286 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:40:21,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:40:21,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:40:21,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:40:21,367 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:40:21,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321249464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:21,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:40:21,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 21:40:21,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717588029] [2021-06-05 21:40:21,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:40:21,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:40:21,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:40:21,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:40:21,368 INFO L87 Difference]: Start difference. First operand 8538 states and 34834 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:22,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:40:22,165 INFO L93 Difference]: Finished difference Result 18926 states and 73169 transitions. [2021-06-05 21:40:22,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 21:40:22,165 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 21:40:22,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:40:22,211 INFO L225 Difference]: With dead ends: 18926 [2021-06-05 21:40:22,211 INFO L226 Difference]: Without dead ends: 18926 [2021-06-05 21:40:22,212 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 222.7ms TimeCoverageRelationStatistics Valid=215, Invalid=777, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:40:22,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18926 states. [2021-06-05 21:40:22,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18926 to 8689. [2021-06-05 21:40:22,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8689 states, 8688 states have (on average 4.058586556169429) internal successors, (35261), 8688 states have internal predecessors, (35261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:22,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8689 states to 8689 states and 35261 transitions. [2021-06-05 21:40:22,481 INFO L78 Accepts]: Start accepts. Automaton has 8689 states and 35261 transitions. Word has length 28 [2021-06-05 21:40:22,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:40:22,481 INFO L482 AbstractCegarLoop]: Abstraction has 8689 states and 35261 transitions. [2021-06-05 21:40:22,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:22,481 INFO L276 IsEmpty]: Start isEmpty. Operand 8689 states and 35261 transitions. [2021-06-05 21:40:22,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 21:40:22,550 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:40:22,550 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:40:22,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 21:40:22,761 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:40:22,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:40:22,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1479976792, now seen corresponding path program 13 times [2021-06-05 21:40:22,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:40:22,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364466332] [2021-06-05 21:40:22,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:40:22,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:40:22,789 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:40:22,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:40:22,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364466332] [2021-06-05 21:40:22,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364466332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:22,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201960826] [2021-06-05 21:40:22,789 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:40:22,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:40:22,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:40:22,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:40:22,907 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:40:22,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201960826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:22,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:40:22,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 21:40:22,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657849862] [2021-06-05 21:40:22,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:40:22,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:40:22,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:40:22,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:40:22,908 INFO L87 Difference]: Start difference. First operand 8689 states and 35261 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:23,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:40:23,361 INFO L93 Difference]: Finished difference Result 12612 states and 48542 transitions. [2021-06-05 21:40:23,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:40:23,361 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 21:40:23,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:40:23,390 INFO L225 Difference]: With dead ends: 12612 [2021-06-05 21:40:23,390 INFO L226 Difference]: Without dead ends: 12556 [2021-06-05 21:40:23,390 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 145.1ms TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:40:23,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12556 states. [2021-06-05 21:40:23,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12556 to 8811. [2021-06-05 21:40:23,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8811 states, 8810 states have (on average 4.050397275822928) internal successors, (35684), 8810 states have internal predecessors, (35684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:23,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8811 states to 8811 states and 35684 transitions. [2021-06-05 21:40:23,574 INFO L78 Accepts]: Start accepts. Automaton has 8811 states and 35684 transitions. Word has length 28 [2021-06-05 21:40:23,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:40:23,575 INFO L482 AbstractCegarLoop]: Abstraction has 8811 states and 35684 transitions. [2021-06-05 21:40:23,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:23,575 INFO L276 IsEmpty]: Start isEmpty. Operand 8811 states and 35684 transitions. [2021-06-05 21:40:23,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 21:40:23,591 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:40:23,591 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:40:23,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:40:23,805 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:40:23,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:40:23,805 INFO L82 PathProgramCache]: Analyzing trace with hash -549507314, now seen corresponding path program 14 times [2021-06-05 21:40:23,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:40:23,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845482300] [2021-06-05 21:40:23,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:40:23,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:40:23,825 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:40:23,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:40:23,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845482300] [2021-06-05 21:40:23,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845482300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:23,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830205507] [2021-06-05 21:40:23,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:40:23,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:40:23,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:40:23,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:40:23,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:40:23,931 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:40:23,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830205507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:23,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:40:23,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-06-05 21:40:23,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41677784] [2021-06-05 21:40:23,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:40:23,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:40:23,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:40:23,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:40:23,932 INFO L87 Difference]: Start difference. First operand 8811 states and 35684 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 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) [2021-06-05 21:40:24,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:40:24,365 INFO L93 Difference]: Finished difference Result 16530 states and 63291 transitions. [2021-06-05 21:40:24,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:40:24,365 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 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 28 [2021-06-05 21:40:24,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:40:24,407 INFO L225 Difference]: With dead ends: 16530 [2021-06-05 21:40:24,407 INFO L226 Difference]: Without dead ends: 16530 [2021-06-05 21:40:24,408 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 119.0ms TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:40:24,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16530 states. [2021-06-05 21:40:24,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16530 to 8811. [2021-06-05 21:40:24,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8811 states, 8810 states have (on average 4.044381384790011) internal successors, (35631), 8810 states have internal predecessors, (35631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:24,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8811 states to 8811 states and 35631 transitions. [2021-06-05 21:40:24,670 INFO L78 Accepts]: Start accepts. Automaton has 8811 states and 35631 transitions. Word has length 28 [2021-06-05 21:40:24,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:40:24,670 INFO L482 AbstractCegarLoop]: Abstraction has 8811 states and 35631 transitions. [2021-06-05 21:40:24,670 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 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) [2021-06-05 21:40:24,670 INFO L276 IsEmpty]: Start isEmpty. Operand 8811 states and 35631 transitions. [2021-06-05 21:40:24,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 21:40:24,687 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:40:24,688 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:40:24,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 21:40:24,888 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:40:24,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:40:24,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1999770021, now seen corresponding path program 15 times [2021-06-05 21:40:24,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:40:24,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829089597] [2021-06-05 21:40:24,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:40:24,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:40:24,910 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:40:24,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:40:24,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829089597] [2021-06-05 21:40:24,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829089597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:24,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813265146] [2021-06-05 21:40:24,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:40:24,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 21:40:24,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:40:24,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:40:24,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:40:25,032 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:40:25,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813265146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:25,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:40:25,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-06-05 21:40:25,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204900358] [2021-06-05 21:40:25,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:40:25,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:40:25,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:40:25,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:40:25,033 INFO L87 Difference]: Start difference. First operand 8811 states and 35631 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:25,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:40:25,373 INFO L93 Difference]: Finished difference Result 11652 states and 45517 transitions. [2021-06-05 21:40:25,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:40:25,374 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 21:40:25,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:40:25,401 INFO L225 Difference]: With dead ends: 11652 [2021-06-05 21:40:25,402 INFO L226 Difference]: Without dead ends: 11632 [2021-06-05 21:40:25,402 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 90.6ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:40:25,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11632 states. [2021-06-05 21:40:25,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11632 to 8811. [2021-06-05 21:40:25,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8811 states, 8810 states have (on average 4.043246311010216) internal successors, (35621), 8810 states have internal predecessors, (35621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:25,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8811 states to 8811 states and 35621 transitions. [2021-06-05 21:40:25,635 INFO L78 Accepts]: Start accepts. Automaton has 8811 states and 35621 transitions. Word has length 28 [2021-06-05 21:40:25,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:40:25,635 INFO L482 AbstractCegarLoop]: Abstraction has 8811 states and 35621 transitions. [2021-06-05 21:40:25,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:25,635 INFO L276 IsEmpty]: Start isEmpty. Operand 8811 states and 35621 transitions. [2021-06-05 21:40:25,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 21:40:25,651 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:40:25,651 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:40:25,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 21:40:25,852 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:40:25,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:40:25,852 INFO L82 PathProgramCache]: Analyzing trace with hash 666916329, now seen corresponding path program 16 times [2021-06-05 21:40:25,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:40:25,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010978072] [2021-06-05 21:40:25,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:40:25,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:40:25,874 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:40:25,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:40:25,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010978072] [2021-06-05 21:40:25,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010978072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:25,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323415751] [2021-06-05 21:40:25,875 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:40:25,901 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:40:25,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:40:25,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:40:25,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:40:25,973 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:40:25,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323415751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:25,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:40:25,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-06-05 21:40:25,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067587694] [2021-06-05 21:40:25,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:40:25,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:40:25,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:40:25,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:40:25,974 INFO L87 Difference]: Start difference. First operand 8811 states and 35621 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:26,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:40:26,428 INFO L93 Difference]: Finished difference Result 13573 states and 53112 transitions. [2021-06-05 21:40:26,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:40:26,429 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 21:40:26,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:40:26,461 INFO L225 Difference]: With dead ends: 13573 [2021-06-05 21:40:26,461 INFO L226 Difference]: Without dead ends: 13573 [2021-06-05 21:40:26,462 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 116.1ms TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:40:26,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13573 states. [2021-06-05 21:40:26,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13573 to 8864. [2021-06-05 21:40:26,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8864 states, 8863 states have (on average 4.042423558614464) internal successors, (35828), 8863 states have internal predecessors, (35828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:26,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8864 states to 8864 states and 35828 transitions. [2021-06-05 21:40:26,659 INFO L78 Accepts]: Start accepts. Automaton has 8864 states and 35828 transitions. Word has length 28 [2021-06-05 21:40:26,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:40:26,659 INFO L482 AbstractCegarLoop]: Abstraction has 8864 states and 35828 transitions. [2021-06-05 21:40:26,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:26,660 INFO L276 IsEmpty]: Start isEmpty. Operand 8864 states and 35828 transitions. [2021-06-05 21:40:26,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 21:40:26,675 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:40:26,675 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:40:26,875 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-05 21:40:26,875 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:40:26,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:40:26,876 INFO L82 PathProgramCache]: Analyzing trace with hash 1263312202, now seen corresponding path program 17 times [2021-06-05 21:40:26,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:40:26,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929500995] [2021-06-05 21:40:26,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:40:26,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:40:26,930 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:40:26,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:40:26,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929500995] [2021-06-05 21:40:26,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929500995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:26,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805148812] [2021-06-05 21:40:26,930 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:40:26,957 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:40:26,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:40:26,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:40:26,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:40:27,027 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:40:27,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805148812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:27,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:40:27,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-06-05 21:40:27,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330827833] [2021-06-05 21:40:27,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:40:27,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:40:27,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:40:27,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:40:27,028 INFO L87 Difference]: Start difference. First operand 8864 states and 35828 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:27,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:40:27,401 INFO L93 Difference]: Finished difference Result 14465 states and 55050 transitions. [2021-06-05 21:40:27,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:40:27,401 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 21:40:27,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:40:27,439 INFO L225 Difference]: With dead ends: 14465 [2021-06-05 21:40:27,439 INFO L226 Difference]: Without dead ends: 14437 [2021-06-05 21:40:27,440 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 122.1ms TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:40:27,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14437 states. [2021-06-05 21:40:27,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14437 to 8864. [2021-06-05 21:40:27,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8864 states, 8863 states have (on average 4.0412952724811015) internal successors, (35818), 8863 states have internal predecessors, (35818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:27,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8864 states to 8864 states and 35818 transitions. [2021-06-05 21:40:27,705 INFO L78 Accepts]: Start accepts. Automaton has 8864 states and 35818 transitions. Word has length 28 [2021-06-05 21:40:27,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:40:27,705 INFO L482 AbstractCegarLoop]: Abstraction has 8864 states and 35818 transitions. [2021-06-05 21:40:27,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:27,706 INFO L276 IsEmpty]: Start isEmpty. Operand 8864 states and 35818 transitions. [2021-06-05 21:40:27,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 21:40:27,721 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:40:27,721 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:40:27,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 21:40:27,922 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:40:27,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:40:27,922 INFO L82 PathProgramCache]: Analyzing trace with hash 198513879, now seen corresponding path program 18 times [2021-06-05 21:40:27,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:40:27,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134261790] [2021-06-05 21:40:27,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:40:27,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:40:27,957 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:40:27,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:40:27,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134261790] [2021-06-05 21:40:27,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134261790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:27,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712035818] [2021-06-05 21:40:27,957 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:40:27,984 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:40:27,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:40:27,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:40:27,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:40:28,075 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:40:28,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712035818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:28,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:40:28,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-06-05 21:40:28,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219377293] [2021-06-05 21:40:28,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:40:28,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:40:28,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:40:28,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:40:28,076 INFO L87 Difference]: Start difference. First operand 8864 states and 35818 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:28,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:40:28,775 INFO L93 Difference]: Finished difference Result 17059 states and 67264 transitions. [2021-06-05 21:40:28,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 21:40:28,775 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 21:40:28,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:40:28,820 INFO L225 Difference]: With dead ends: 17059 [2021-06-05 21:40:28,821 INFO L226 Difference]: Without dead ends: 17059 [2021-06-05 21:40:28,821 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 216.3ms TimeCoverageRelationStatistics Valid=185, Invalid=745, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:40:28,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17059 states. [2021-06-05 21:40:29,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17059 to 8917. [2021-06-05 21:40:29,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8917 states, 8916 states have (on average 4.040489008524002) internal successors, (36025), 8916 states have internal predecessors, (36025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:29,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8917 states to 8917 states and 36025 transitions. [2021-06-05 21:40:29,089 INFO L78 Accepts]: Start accepts. Automaton has 8917 states and 36025 transitions. Word has length 28 [2021-06-05 21:40:29,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:40:29,089 INFO L482 AbstractCegarLoop]: Abstraction has 8917 states and 36025 transitions. [2021-06-05 21:40:29,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:29,089 INFO L276 IsEmpty]: Start isEmpty. Operand 8917 states and 36025 transitions. [2021-06-05 21:40:29,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 21:40:29,105 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:40:29,105 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:40:29,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:40:29,306 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:40:29,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:40:29,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1200504206, now seen corresponding path program 19 times [2021-06-05 21:40:29,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:40:29,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495449393] [2021-06-05 21:40:29,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:40:29,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:40:29,333 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:40:29,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:40:29,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495449393] [2021-06-05 21:40:29,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495449393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:29,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665567294] [2021-06-05 21:40:29,334 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:40:29,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:40:29,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:40:29,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:40:29,448 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:40:29,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665567294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:29,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:40:29,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-06-05 21:40:29,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858772594] [2021-06-05 21:40:29,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:40:29,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:40:29,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:40:29,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:40:29,449 INFO L87 Difference]: Start difference. First operand 8917 states and 36025 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:30,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:40:30,020 INFO L93 Difference]: Finished difference Result 17336 states and 65142 transitions. [2021-06-05 21:40:30,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 21:40:30,021 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 21:40:30,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:40:30,066 INFO L225 Difference]: With dead ends: 17336 [2021-06-05 21:40:30,066 INFO L226 Difference]: Without dead ends: 17224 [2021-06-05 21:40:30,066 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 250.9ms TimeCoverageRelationStatistics Valid=211, Invalid=781, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:40:30,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17224 states. [2021-06-05 21:40:30,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17224 to 8917. [2021-06-05 21:40:30,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8917 states, 8916 states have (on average 4.039367429340511) internal successors, (36015), 8916 states have internal predecessors, (36015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:30,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8917 states to 8917 states and 36015 transitions. [2021-06-05 21:40:30,350 INFO L78 Accepts]: Start accepts. Automaton has 8917 states and 36015 transitions. Word has length 28 [2021-06-05 21:40:30,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:40:30,350 INFO L482 AbstractCegarLoop]: Abstraction has 8917 states and 36015 transitions. [2021-06-05 21:40:30,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:30,350 INFO L276 IsEmpty]: Start isEmpty. Operand 8917 states and 36015 transitions. [2021-06-05 21:40:30,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 21:40:30,367 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:40:30,367 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:40:30,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:40:30,576 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:40:30,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:40:30,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1319877997, now seen corresponding path program 20 times [2021-06-05 21:40:30,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:40:30,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456465702] [2021-06-05 21:40:30,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:40:30,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:40:30,608 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:40:30,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:40:30,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456465702] [2021-06-05 21:40:30,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456465702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:30,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889189659] [2021-06-05 21:40:30,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:40:30,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:40:30,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:40:30,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:40:30,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:40:30,712 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:40:30,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889189659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:30,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:40:30,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 21:40:30,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481935734] [2021-06-05 21:40:30,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:40:30,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:40:30,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:40:30,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:40:30,713 INFO L87 Difference]: Start difference. First operand 8917 states and 36015 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:31,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:40:31,488 INFO L93 Difference]: Finished difference Result 13676 states and 54158 transitions. [2021-06-05 21:40:31,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 21:40:31,489 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 21:40:31,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:40:31,523 INFO L225 Difference]: With dead ends: 13676 [2021-06-05 21:40:31,523 INFO L226 Difference]: Without dead ends: 13676 [2021-06-05 21:40:31,524 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 312.3ms TimeCoverageRelationStatistics Valid=267, Invalid=923, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 21:40:31,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13676 states. [2021-06-05 21:40:31,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13676 to 9131. [2021-06-05 21:40:31,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9131 states, 9130 states have (on average 4.022562979189485) internal successors, (36726), 9130 states have internal predecessors, (36726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:31,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9131 states to 9131 states and 36726 transitions. [2021-06-05 21:40:31,755 INFO L78 Accepts]: Start accepts. Automaton has 9131 states and 36726 transitions. Word has length 28 [2021-06-05 21:40:31,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:40:31,756 INFO L482 AbstractCegarLoop]: Abstraction has 9131 states and 36726 transitions. [2021-06-05 21:40:31,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:31,756 INFO L276 IsEmpty]: Start isEmpty. Operand 9131 states and 36726 transitions. [2021-06-05 21:40:31,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 21:40:31,771 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:40:31,771 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:40:31,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-06-05 21:40:31,988 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:40:31,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:40:31,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1439601334, now seen corresponding path program 21 times [2021-06-05 21:40:31,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:40:31,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092222000] [2021-06-05 21:40:31,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:40:31,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:40:32,031 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:40:32,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:40:32,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092222000] [2021-06-05 21:40:32,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092222000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:32,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169941020] [2021-06-05 21:40:32,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:40:32,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:40:32,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:40:32,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:40:32,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:40:32,151 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:40:32,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169941020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:32,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:40:32,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 21:40:32,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407705688] [2021-06-05 21:40:32,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:40:32,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:40:32,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:40:32,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:40:32,152 INFO L87 Difference]: Start difference. First operand 9131 states and 36726 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:32,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:40:32,675 INFO L93 Difference]: Finished difference Result 15155 states and 56901 transitions. [2021-06-05 21:40:32,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:40:32,675 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 21:40:32,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:40:32,711 INFO L225 Difference]: With dead ends: 15155 [2021-06-05 21:40:32,711 INFO L226 Difference]: Without dead ends: 15043 [2021-06-05 21:40:32,711 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 224.4ms TimeCoverageRelationStatistics Valid=198, Invalid=732, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:40:32,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15043 states. [2021-06-05 21:40:32,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15043 to 9347. [2021-06-05 21:40:32,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9347 states, 9346 states have (on average 4.008238818745988) internal successors, (37461), 9346 states have internal predecessors, (37461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:32,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9347 states to 9347 states and 37461 transitions. [2021-06-05 21:40:32,973 INFO L78 Accepts]: Start accepts. Automaton has 9347 states and 37461 transitions. Word has length 28 [2021-06-05 21:40:32,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:40:32,973 INFO L482 AbstractCegarLoop]: Abstraction has 9347 states and 37461 transitions. [2021-06-05 21:40:32,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:32,973 INFO L276 IsEmpty]: Start isEmpty. Operand 9347 states and 37461 transitions. [2021-06-05 21:40:32,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 21:40:32,988 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:40:32,988 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:40:33,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:40:33,189 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:40:33,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:40:33,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1045336016, now seen corresponding path program 22 times [2021-06-05 21:40:33,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:40:33,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888264038] [2021-06-05 21:40:33,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:40:33,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:40:33,216 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:40:33,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:40:33,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888264038] [2021-06-05 21:40:33,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888264038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:33,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418061710] [2021-06-05 21:40:33,216 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:40:33,275 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:40:33,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:40:33,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:40:33,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:40:33,351 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:40:33,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418061710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:33,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:40:33,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 21:40:33,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367804329] [2021-06-05 21:40:33,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:40:33,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:40:33,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:40:33,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:40:33,354 INFO L87 Difference]: Start difference. First operand 9347 states and 37461 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:33,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:40:33,965 INFO L93 Difference]: Finished difference Result 16354 states and 63144 transitions. [2021-06-05 21:40:33,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 21:40:33,965 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 21:40:33,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:40:34,004 INFO L225 Difference]: With dead ends: 16354 [2021-06-05 21:40:34,004 INFO L226 Difference]: Without dead ends: 16354 [2021-06-05 21:40:34,005 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 206.9ms TimeCoverageRelationStatistics Valid=215, Invalid=777, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:40:34,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16354 states. [2021-06-05 21:40:34,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16354 to 9241. [2021-06-05 21:40:34,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9241 states, 9240 states have (on average 3.997943722943723) internal successors, (36941), 9240 states have internal predecessors, (36941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:34,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9241 states to 9241 states and 36941 transitions. [2021-06-05 21:40:34,252 INFO L78 Accepts]: Start accepts. Automaton has 9241 states and 36941 transitions. Word has length 28 [2021-06-05 21:40:34,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:40:34,253 INFO L482 AbstractCegarLoop]: Abstraction has 9241 states and 36941 transitions. [2021-06-05 21:40:34,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:34,253 INFO L276 IsEmpty]: Start isEmpty. Operand 9241 states and 36941 transitions. [2021-06-05 21:40:34,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 21:40:34,269 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:40:34,269 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:40:34,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-05 21:40:34,470 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:40:34,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:40:34,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1291785701, now seen corresponding path program 23 times [2021-06-05 21:40:34,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:40:34,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461584034] [2021-06-05 21:40:34,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:40:34,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:40:34,498 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:40:34,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:40:34,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461584034] [2021-06-05 21:40:34,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461584034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:34,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534023093] [2021-06-05 21:40:34,498 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:40:34,534 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:40:34,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:40:34,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:40:34,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:40:34,604 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:40:34,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534023093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:34,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:40:34,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 21:40:34,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116774546] [2021-06-05 21:40:34,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:40:34,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:40:34,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:40:34,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:40:34,605 INFO L87 Difference]: Start difference. First operand 9241 states and 36941 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:35,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:40:35,090 INFO L93 Difference]: Finished difference Result 12762 states and 48779 transitions. [2021-06-05 21:40:35,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:40:35,091 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 21:40:35,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:40:35,122 INFO L225 Difference]: With dead ends: 12762 [2021-06-05 21:40:35,122 INFO L226 Difference]: Without dead ends: 12722 [2021-06-05 21:40:35,123 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 154.4ms TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:40:35,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12722 states. [2021-06-05 21:40:35,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12722 to 8983. [2021-06-05 21:40:35,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8983 states, 8982 states have (on average 4.0035626809173905) internal successors, (35960), 8982 states have internal predecessors, (35960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:35,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8983 states to 8983 states and 35960 transitions. [2021-06-05 21:40:35,458 INFO L78 Accepts]: Start accepts. Automaton has 8983 states and 35960 transitions. Word has length 28 [2021-06-05 21:40:35,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:40:35,458 INFO L482 AbstractCegarLoop]: Abstraction has 8983 states and 35960 transitions. [2021-06-05 21:40:35,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:35,458 INFO L276 IsEmpty]: Start isEmpty. Operand 8983 states and 35960 transitions. [2021-06-05 21:40:35,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 21:40:35,473 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:40:35,473 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:40:35,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 21:40:35,674 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:40:35,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:40:35,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1628155237, now seen corresponding path program 4 times [2021-06-05 21:40:35,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:40:35,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223335048] [2021-06-05 21:40:35,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:40:35,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:40:35,763 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:40:35,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:40:35,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223335048] [2021-06-05 21:40:35,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223335048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:35,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087214321] [2021-06-05 21:40:35,763 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:40:35,794 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:40:35,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:40:35,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:40:35,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:40:35,881 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:40:35,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087214321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:35,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:40:35,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 21:40:35,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999899295] [2021-06-05 21:40:35,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:40:35,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:40:35,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:40:35,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:40:35,882 INFO L87 Difference]: Start difference. First operand 8983 states and 35960 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:36,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:40:36,648 INFO L93 Difference]: Finished difference Result 30234 states and 120265 transitions. [2021-06-05 21:40:36,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 21:40:36,649 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 21:40:36,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:40:36,736 INFO L225 Difference]: With dead ends: 30234 [2021-06-05 21:40:36,736 INFO L226 Difference]: Without dead ends: 30234 [2021-06-05 21:40:36,736 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 316.7ms TimeCoverageRelationStatistics Valid=267, Invalid=923, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 21:40:36,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30234 states. [2021-06-05 21:40:37,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30234 to 14412. [2021-06-05 21:40:37,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14412 states, 14411 states have (on average 4.099715495107904) internal successors, (59081), 14411 states have internal predecessors, (59081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:37,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14412 states to 14412 states and 59081 transitions. [2021-06-05 21:40:37,154 INFO L78 Accepts]: Start accepts. Automaton has 14412 states and 59081 transitions. Word has length 28 [2021-06-05 21:40:37,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:40:37,155 INFO L482 AbstractCegarLoop]: Abstraction has 14412 states and 59081 transitions. [2021-06-05 21:40:37,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:37,155 INFO L276 IsEmpty]: Start isEmpty. Operand 14412 states and 59081 transitions. [2021-06-05 21:40:37,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 21:40:37,185 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:40:37,185 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:40:37,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 21:40:37,385 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:40:37,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:40:37,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1254864512, now seen corresponding path program 5 times [2021-06-05 21:40:37,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:40:37,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910678212] [2021-06-05 21:40:37,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:40:37,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:40:37,415 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:40:37,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:40:37,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910678212] [2021-06-05 21:40:37,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910678212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:37,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398343460] [2021-06-05 21:40:37,415 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:40:37,439 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:40:37,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:40:37,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:40:37,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:40:37,506 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:40:37,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398343460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:37,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:40:37,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 21:40:37,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424008955] [2021-06-05 21:40:37,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:40:37,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:40:37,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:40:37,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:40:37,507 INFO L87 Difference]: Start difference. First operand 14412 states and 59081 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:38,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:40:38,221 INFO L93 Difference]: Finished difference Result 40819 states and 161536 transitions. [2021-06-05 21:40:38,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 21:40:38,221 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 21:40:38,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:40:38,343 INFO L225 Difference]: With dead ends: 40819 [2021-06-05 21:40:38,343 INFO L226 Difference]: Without dead ends: 40578 [2021-06-05 21:40:38,343 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 253.8ms TimeCoverageRelationStatistics Valid=229, Invalid=827, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:40:38,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40578 states. [2021-06-05 21:40:38,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40578 to 24036. [2021-06-05 21:40:38,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24036 states, 24035 states have (on average 4.249511129602663) internal successors, (102137), 24035 states have internal predecessors, (102137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:39,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24036 states to 24036 states and 102137 transitions. [2021-06-05 21:40:39,035 INFO L78 Accepts]: Start accepts. Automaton has 24036 states and 102137 transitions. Word has length 28 [2021-06-05 21:40:39,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:40:39,035 INFO L482 AbstractCegarLoop]: Abstraction has 24036 states and 102137 transitions. [2021-06-05 21:40:39,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:39,035 INFO L276 IsEmpty]: Start isEmpty. Operand 24036 states and 102137 transitions. [2021-06-05 21:40:39,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 21:40:39,084 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:40:39,084 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:40:39,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 21:40:39,285 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:40:39,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:40:39,285 INFO L82 PathProgramCache]: Analyzing trace with hash 165103934, now seen corresponding path program 6 times [2021-06-05 21:40:39,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:40:39,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496962530] [2021-06-05 21:40:39,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:40:39,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:40:39,304 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:40:39,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:40:39,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496962530] [2021-06-05 21:40:39,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496962530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:39,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079536834] [2021-06-05 21:40:39,304 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:40:39,329 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:40:39,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:40:39,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:40:39,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:40:39,390 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:40:39,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079536834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:39,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:40:39,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-06-05 21:40:39,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051692330] [2021-06-05 21:40:39,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:40:39,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:40:39,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:40:39,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:40:39,391 INFO L87 Difference]: Start difference. First operand 24036 states and 102137 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:39,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:40:39,889 INFO L93 Difference]: Finished difference Result 42953 states and 171667 transitions. [2021-06-05 21:40:39,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:40:39,889 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 21:40:39,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:40:40,030 INFO L225 Difference]: With dead ends: 42953 [2021-06-05 21:40:40,030 INFO L226 Difference]: Without dead ends: 42953 [2021-06-05 21:40:40,030 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 118.1ms TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:40:40,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42953 states. [2021-06-05 21:40:40,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42953 to 24036. [2021-06-05 21:40:40,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24036 states, 24035 states have (on average 4.228292074058665) internal successors, (101627), 24035 states have internal predecessors, (101627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:40,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24036 states to 24036 states and 101627 transitions. [2021-06-05 21:40:40,767 INFO L78 Accepts]: Start accepts. Automaton has 24036 states and 101627 transitions. Word has length 28 [2021-06-05 21:40:40,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:40:40,767 INFO L482 AbstractCegarLoop]: Abstraction has 24036 states and 101627 transitions. [2021-06-05 21:40:40,768 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:40,768 INFO L276 IsEmpty]: Start isEmpty. Operand 24036 states and 101627 transitions. [2021-06-05 21:40:40,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 21:40:40,811 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:40:40,811 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:40:41,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 21:40:41,017 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:40:41,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:40:41,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1784850851, now seen corresponding path program 7 times [2021-06-05 21:40:41,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:40:41,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128301102] [2021-06-05 21:40:41,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:40:41,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:40:41,035 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:40:41,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:40:41,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128301102] [2021-06-05 21:40:41,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128301102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:41,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362068718] [2021-06-05 21:40:41,035 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:40:41,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:40:41,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:40:41,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:40:41,128 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:40:41,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362068718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:41,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:40:41,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-06-05 21:40:41,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141257250] [2021-06-05 21:40:41,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:40:41,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:40:41,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:40:41,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:40:41,129 INFO L87 Difference]: Start difference. First operand 24036 states and 101627 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:41,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:40:41,518 INFO L93 Difference]: Finished difference Result 29179 states and 119232 transitions. [2021-06-05 21:40:41,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:40:41,519 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 21:40:41,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:40:41,598 INFO L225 Difference]: With dead ends: 29179 [2021-06-05 21:40:41,599 INFO L226 Difference]: Without dead ends: 29131 [2021-06-05 21:40:41,599 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 86.4ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:40:41,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29131 states. [2021-06-05 21:40:42,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29131 to 24202. [2021-06-05 21:40:42,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24202 states, 24201 states have (on average 4.223296557993471) internal successors, (102208), 24201 states have internal predecessors, (102208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:42,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24202 states to 24202 states and 102208 transitions. [2021-06-05 21:40:42,139 INFO L78 Accepts]: Start accepts. Automaton has 24202 states and 102208 transitions. Word has length 28 [2021-06-05 21:40:42,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:40:42,140 INFO L482 AbstractCegarLoop]: Abstraction has 24202 states and 102208 transitions. [2021-06-05 21:40:42,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:42,140 INFO L276 IsEmpty]: Start isEmpty. Operand 24202 states and 102208 transitions. [2021-06-05 21:40:42,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 21:40:42,184 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:40:42,184 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:40:42,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:40:42,385 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:40:42,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:40:42,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1672080553, now seen corresponding path program 8 times [2021-06-05 21:40:42,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:40:42,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97089819] [2021-06-05 21:40:42,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:40:42,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:40:42,414 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:40:42,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:40:42,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97089819] [2021-06-05 21:40:42,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97089819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:42,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554682692] [2021-06-05 21:40:42,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:40:42,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:40:42,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:40:42,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:40:42,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:40:42,527 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:40:42,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554682692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:42,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:40:42,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 9 [2021-06-05 21:40:42,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130439513] [2021-06-05 21:40:42,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:40:42,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:40:42,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:40:42,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:40:42,528 INFO L87 Difference]: Start difference. First operand 24202 states and 102208 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:43,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:40:43,292 INFO L93 Difference]: Finished difference Result 49310 states and 196485 transitions. [2021-06-05 21:40:43,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:40:43,293 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 21:40:43,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:40:43,443 INFO L225 Difference]: With dead ends: 49310 [2021-06-05 21:40:43,444 INFO L226 Difference]: Without dead ends: 49310 [2021-06-05 21:40:43,444 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 132.8ms TimeCoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:40:43,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49310 states. [2021-06-05 21:40:44,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49310 to 24542. [2021-06-05 21:40:44,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24542 states, 24541 states have (on average 4.213683223992502) internal successors, (103408), 24541 states have internal predecessors, (103408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:44,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24542 states to 24542 states and 103408 transitions. [2021-06-05 21:40:44,161 INFO L78 Accepts]: Start accepts. Automaton has 24542 states and 103408 transitions. Word has length 28 [2021-06-05 21:40:44,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:40:44,161 INFO L482 AbstractCegarLoop]: Abstraction has 24542 states and 103408 transitions. [2021-06-05 21:40:44,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:44,162 INFO L276 IsEmpty]: Start isEmpty. Operand 24542 states and 103408 transitions. [2021-06-05 21:40:44,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 21:40:44,218 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:40:44,218 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:40:44,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 21:40:44,425 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:40:44,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:40:44,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1854451132, now seen corresponding path program 9 times [2021-06-05 21:40:44,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:40:44,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846838968] [2021-06-05 21:40:44,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:40:44,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:40:44,449 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:40:44,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:40:44,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846838968] [2021-06-05 21:40:44,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846838968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:44,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133718138] [2021-06-05 21:40:44,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:40:44,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 21:40:44,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:40:44,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:40:44,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:40:44,556 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:40:44,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133718138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:44,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:40:44,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 9 [2021-06-05 21:40:44,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534380008] [2021-06-05 21:40:44,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:40:44,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:40:44,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:40:44,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:40:44,557 INFO L87 Difference]: Start difference. First operand 24542 states and 103408 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:45,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:40:45,165 INFO L93 Difference]: Finished difference Result 43190 states and 171488 transitions. [2021-06-05 21:40:45,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:40:45,166 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 21:40:45,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:40:45,292 INFO L225 Difference]: With dead ends: 43190 [2021-06-05 21:40:45,292 INFO L226 Difference]: Without dead ends: 43115 [2021-06-05 21:40:45,292 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 142.4ms TimeCoverageRelationStatistics Valid=144, Invalid=456, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:40:45,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43115 states. [2021-06-05 21:40:45,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43115 to 24542. [2021-06-05 21:40:45,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24542 states, 24541 states have (on average 4.212705268733956) internal successors, (103384), 24541 states have internal predecessors, (103384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:46,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24542 states to 24542 states and 103384 transitions. [2021-06-05 21:40:46,020 INFO L78 Accepts]: Start accepts. Automaton has 24542 states and 103384 transitions. Word has length 28 [2021-06-05 21:40:46,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:40:46,020 INFO L482 AbstractCegarLoop]: Abstraction has 24542 states and 103384 transitions. [2021-06-05 21:40:46,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:46,020 INFO L276 IsEmpty]: Start isEmpty. Operand 24542 states and 103384 transitions. [2021-06-05 21:40:46,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 21:40:46,065 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:40:46,065 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:40:46,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-06-05 21:40:46,266 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:40:46,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:40:46,266 INFO L82 PathProgramCache]: Analyzing trace with hash 975011082, now seen corresponding path program 10 times [2021-06-05 21:40:46,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:40:46,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682326742] [2021-06-05 21:40:46,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:40:46,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:40:46,286 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:40:46,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:40:46,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682326742] [2021-06-05 21:40:46,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682326742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:46,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608153687] [2021-06-05 21:40:46,286 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:40:46,309 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:40:46,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:40:46,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:40:46,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:40:46,385 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:40:46,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608153687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:46,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:40:46,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 9 [2021-06-05 21:40:46,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960688817] [2021-06-05 21:40:46,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:40:46,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:40:46,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:40:46,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:40:46,386 INFO L87 Difference]: Start difference. First operand 24542 states and 103384 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:47,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:40:47,153 INFO L93 Difference]: Finished difference Result 51588 states and 205543 transitions. [2021-06-05 21:40:47,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:40:47,154 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 21:40:47,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:40:47,319 INFO L225 Difference]: With dead ends: 51588 [2021-06-05 21:40:47,319 INFO L226 Difference]: Without dead ends: 51588 [2021-06-05 21:40:47,319 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 178.2ms TimeCoverageRelationStatistics Valid=184, Invalid=572, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:40:47,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51588 states. [2021-06-05 21:40:47,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51588 to 24882. [2021-06-05 21:40:48,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24882 states, 24881 states have (on average 4.210200554640087) internal successors, (104754), 24881 states have internal predecessors, (104754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:48,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24882 states to 24882 states and 104754 transitions. [2021-06-05 21:40:48,096 INFO L78 Accepts]: Start accepts. Automaton has 24882 states and 104754 transitions. Word has length 28 [2021-06-05 21:40:48,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:40:48,096 INFO L482 AbstractCegarLoop]: Abstraction has 24882 states and 104754 transitions. [2021-06-05 21:40:48,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:48,096 INFO L276 IsEmpty]: Start isEmpty. Operand 24882 states and 104754 transitions. [2021-06-05 21:40:48,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 21:40:48,151 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:40:48,151 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:40:48,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:40:48,361 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:40:48,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:40:48,361 INFO L82 PathProgramCache]: Analyzing trace with hash -974943703, now seen corresponding path program 11 times [2021-06-05 21:40:48,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:40:48,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702609415] [2021-06-05 21:40:48,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:40:48,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:40:48,397 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:40:48,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:40:48,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702609415] [2021-06-05 21:40:48,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702609415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:48,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881964520] [2021-06-05 21:40:48,398 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:40:48,429 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:40:48,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:40:48,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:40:48,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:40:48,516 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:40:48,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881964520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:48,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:40:48,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 9 [2021-06-05 21:40:48,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332387516] [2021-06-05 21:40:48,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:40:48,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:40:48,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:40:48,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:40:48,517 INFO L87 Difference]: Start difference. First operand 24882 states and 104754 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:49,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:40:49,079 INFO L93 Difference]: Finished difference Result 39744 states and 158044 transitions. [2021-06-05 21:40:49,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:40:49,080 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 21:40:49,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:40:49,193 INFO L225 Difference]: With dead ends: 39744 [2021-06-05 21:40:49,194 INFO L226 Difference]: Without dead ends: 39696 [2021-06-05 21:40:49,194 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 130.2ms TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:40:49,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39696 states. [2021-06-05 21:40:49,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39696 to 24882. [2021-06-05 21:40:49,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24882 states, 24881 states have (on average 4.209235963184759) internal successors, (104730), 24881 states have internal predecessors, (104730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:50,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24882 states to 24882 states and 104730 transitions. [2021-06-05 21:40:50,046 INFO L78 Accepts]: Start accepts. Automaton has 24882 states and 104730 transitions. Word has length 28 [2021-06-05 21:40:50,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:40:50,046 INFO L482 AbstractCegarLoop]: Abstraction has 24882 states and 104730 transitions. [2021-06-05 21:40:50,046 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:50,046 INFO L276 IsEmpty]: Start isEmpty. Operand 24882 states and 104730 transitions. [2021-06-05 21:40:50,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 21:40:50,093 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:40:50,093 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:40:50,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-05 21:40:50,304 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:40:50,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:40:50,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1393922136, now seen corresponding path program 12 times [2021-06-05 21:40:50,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:40:50,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005480666] [2021-06-05 21:40:50,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:40:50,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:40:50,341 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:40:50,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:40:50,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005480666] [2021-06-05 21:40:50,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005480666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:50,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334338348] [2021-06-05 21:40:50,341 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:40:50,407 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:40:50,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:40:50,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:40:50,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:40:50,492 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:40:50,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334338348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:50,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:40:50,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 21:40:50,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821047799] [2021-06-05 21:40:50,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:40:50,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:40:50,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:40:50,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:40:50,493 INFO L87 Difference]: Start difference. First operand 24882 states and 104730 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:51,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:40:51,339 INFO L93 Difference]: Finished difference Result 51567 states and 205376 transitions. [2021-06-05 21:40:51,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 21:40:51,340 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 21:40:51,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:40:51,511 INFO L225 Difference]: With dead ends: 51567 [2021-06-05 21:40:51,511 INFO L226 Difference]: Without dead ends: 51567 [2021-06-05 21:40:51,512 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 212.7ms TimeCoverageRelationStatistics Valid=215, Invalid=777, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:40:51,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51567 states. [2021-06-05 21:40:52,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51567 to 25308. [2021-06-05 21:40:52,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25308 states, 25307 states have (on average 4.182123523135891) internal successors, (105837), 25307 states have internal predecessors, (105837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:52,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25308 states to 25308 states and 105837 transitions. [2021-06-05 21:40:52,703 INFO L78 Accepts]: Start accepts. Automaton has 25308 states and 105837 transitions. Word has length 28 [2021-06-05 21:40:52,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:40:52,703 INFO L482 AbstractCegarLoop]: Abstraction has 25308 states and 105837 transitions. [2021-06-05 21:40:52,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:52,703 INFO L276 IsEmpty]: Start isEmpty. Operand 25308 states and 105837 transitions. [2021-06-05 21:40:52,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 21:40:52,768 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:40:52,768 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:40:52,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:40:52,968 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:40:52,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:40:52,969 INFO L82 PathProgramCache]: Analyzing trace with hash 770340333, now seen corresponding path program 13 times [2021-06-05 21:40:52,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:40:52,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571661889] [2021-06-05 21:40:52,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:40:52,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:40:53,089 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:40:53,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:40:53,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571661889] [2021-06-05 21:40:53,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571661889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:53,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838208127] [2021-06-05 21:40:53,090 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 21:40:53,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:40:53,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:40:53,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:40:53,196 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:40:53,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838208127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:53,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:40:53,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 21:40:53,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75450041] [2021-06-05 21:40:53,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:40:53,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:40:53,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:40:53,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:40:53,197 INFO L87 Difference]: Start difference. First operand 25308 states and 105837 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:53,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:40:53,909 INFO L93 Difference]: Finished difference Result 35545 states and 141251 transitions. [2021-06-05 21:40:53,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:40:53,909 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 21:40:53,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:40:54,003 INFO L225 Difference]: With dead ends: 35545 [2021-06-05 21:40:54,004 INFO L226 Difference]: Without dead ends: 35497 [2021-06-05 21:40:54,004 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 175.5ms TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:40:54,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35497 states. [2021-06-05 21:40:54,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35497 to 25624. [2021-06-05 21:40:54,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25624 states, 25623 states have (on average 4.173633064044023) internal successors, (106941), 25623 states have internal predecessors, (106941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:54,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25624 states to 25624 states and 106941 transitions. [2021-06-05 21:40:54,791 INFO L78 Accepts]: Start accepts. Automaton has 25624 states and 106941 transitions. Word has length 28 [2021-06-05 21:40:54,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:40:54,791 INFO L482 AbstractCegarLoop]: Abstraction has 25624 states and 106941 transitions. [2021-06-05 21:40:54,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:54,791 INFO L276 IsEmpty]: Start isEmpty. Operand 25624 states and 106941 transitions. [2021-06-05 21:40:54,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 21:40:54,843 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:40:54,843 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:40:55,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-06-05 21:40:55,045 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:40:55,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:40:55,045 INFO L82 PathProgramCache]: Analyzing trace with hash 778555929, now seen corresponding path program 14 times [2021-06-05 21:40:55,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:40:55,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47007438] [2021-06-05 21:40:55,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:40:55,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:40:55,063 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:40:55,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:40:55,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47007438] [2021-06-05 21:40:55,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47007438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:55,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919556297] [2021-06-05 21:40:55,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:40:55,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:40:55,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:40:55,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:40:55,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:40:55,147 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:40:55,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919556297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:55,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:40:55,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-06-05 21:40:55,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623118674] [2021-06-05 21:40:55,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:40:55,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:40:55,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:40:55,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:40:55,148 INFO L87 Difference]: Start difference. First operand 25624 states and 106941 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:55,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:40:55,749 INFO L93 Difference]: Finished difference Result 46151 states and 182270 transitions. [2021-06-05 21:40:55,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:40:55,749 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 21:40:55,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:40:55,876 INFO L225 Difference]: With dead ends: 46151 [2021-06-05 21:40:55,877 INFO L226 Difference]: Without dead ends: 46151 [2021-06-05 21:40:55,877 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 110.5ms TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:40:55,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46151 states. [2021-06-05 21:40:56,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46151 to 25624. [2021-06-05 21:40:56,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25624 states, 25623 states have (on average 4.166998399875112) internal successors, (106771), 25623 states have internal predecessors, (106771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:56,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25624 states to 25624 states and 106771 transitions. [2021-06-05 21:40:56,786 INFO L78 Accepts]: Start accepts. Automaton has 25624 states and 106771 transitions. Word has length 28 [2021-06-05 21:40:56,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:40:56,787 INFO L482 AbstractCegarLoop]: Abstraction has 25624 states and 106771 transitions. [2021-06-05 21:40:56,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:56,787 INFO L276 IsEmpty]: Start isEmpty. Operand 25624 states and 106771 transitions. [2021-06-05 21:40:56,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 21:40:56,840 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:40:56,840 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:40:57,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-06-05 21:40:57,041 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:40:57,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:40:57,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1546991540, now seen corresponding path program 15 times [2021-06-05 21:40:57,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:40:57,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473877677] [2021-06-05 21:40:57,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:40:57,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:40:57,061 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:40:57,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:40:57,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473877677] [2021-06-05 21:40:57,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473877677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:57,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904214729] [2021-06-05 21:40:57,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:40:57,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 21:40:57,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:40:57,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:40:57,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:40:57,145 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:40:57,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904214729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:57,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:40:57,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-06-05 21:40:57,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772358783] [2021-06-05 21:40:57,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:40:57,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:40:57,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:40:57,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:40:57,146 INFO L87 Difference]: Start difference. First operand 25624 states and 106771 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:57,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:40:57,668 INFO L93 Difference]: Finished difference Result 32707 states and 131617 transitions. [2021-06-05 21:40:57,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:40:57,669 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 21:40:57,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:40:57,765 INFO L225 Difference]: With dead ends: 32707 [2021-06-05 21:40:57,765 INFO L226 Difference]: Without dead ends: 32682 [2021-06-05 21:40:57,765 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 221.6ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:40:57,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32682 states. [2021-06-05 21:40:58,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32682 to 25624. [2021-06-05 21:40:58,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25624 states, 25623 states have (on average 4.166530070639659) internal successors, (106759), 25623 states have internal predecessors, (106759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:58,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25624 states to 25624 states and 106759 transitions. [2021-06-05 21:40:58,654 INFO L78 Accepts]: Start accepts. Automaton has 25624 states and 106759 transitions. Word has length 28 [2021-06-05 21:40:58,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:40:58,654 INFO L482 AbstractCegarLoop]: Abstraction has 25624 states and 106759 transitions. [2021-06-05 21:40:58,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:58,655 INFO L276 IsEmpty]: Start isEmpty. Operand 25624 states and 106759 transitions. [2021-06-05 21:40:58,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 21:40:58,720 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:40:58,720 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:40:58,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-05 21:40:58,920 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:40:58,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:40:58,921 INFO L82 PathProgramCache]: Analyzing trace with hash 81486458, now seen corresponding path program 16 times [2021-06-05 21:40:58,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:40:58,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257931189] [2021-06-05 21:40:58,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:40:58,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:40:58,946 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:40:58,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:40:58,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257931189] [2021-06-05 21:40:58,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257931189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:58,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80071473] [2021-06-05 21:40:58,946 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:40:59,021 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:40:59,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:40:59,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:40:59,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:40:59,093 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:40:59,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80071473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:40:59,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:40:59,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-06-05 21:40:59,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072685314] [2021-06-05 21:40:59,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:40:59,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:40:59,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:40:59,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:40:59,094 INFO L87 Difference]: Start difference. First operand 25624 states and 106759 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:40:59,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:40:59,838 INFO L93 Difference]: Finished difference Result 38112 states and 153561 transitions. [2021-06-05 21:40:59,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:40:59,838 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 21:40:59,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:40:59,971 INFO L225 Difference]: With dead ends: 38112 [2021-06-05 21:40:59,971 INFO L226 Difference]: Without dead ends: 38112 [2021-06-05 21:40:59,971 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 130.1ms TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:41:00,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38112 states. [2021-06-05 21:41:00,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38112 to 25794. [2021-06-05 21:41:00,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25794 states, 25793 states have (on average 4.1656263327259335) internal successors, (107444), 25793 states have internal predecessors, (107444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:00,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25794 states to 25794 states and 107444 transitions. [2021-06-05 21:41:00,690 INFO L78 Accepts]: Start accepts. Automaton has 25794 states and 107444 transitions. Word has length 28 [2021-06-05 21:41:00,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:41:00,690 INFO L482 AbstractCegarLoop]: Abstraction has 25794 states and 107444 transitions. [2021-06-05 21:41:00,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:00,690 INFO L276 IsEmpty]: Start isEmpty. Operand 25794 states and 107444 transitions. [2021-06-05 21:41:00,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 21:41:00,743 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:41:00,743 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:41:00,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-05 21:41:00,946 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:41:00,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:41:00,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1868468327, now seen corresponding path program 17 times [2021-06-05 21:41:00,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:41:00,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422719052] [2021-06-05 21:41:00,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:41:00,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:41:00,963 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:41:00,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:41:00,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422719052] [2021-06-05 21:41:00,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422719052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:41:00,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828363118] [2021-06-05 21:41:00,964 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:41:01,016 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:41:01,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:41:01,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:41:01,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:41:01,092 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:41:01,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828363118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:41:01,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:41:01,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-06-05 21:41:01,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114805287] [2021-06-05 21:41:01,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:41:01,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:41:01,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:41:01,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:41:01,093 INFO L87 Difference]: Start difference. First operand 25794 states and 107444 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:01,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:41:01,692 INFO L93 Difference]: Finished difference Result 39804 states and 156168 transitions. [2021-06-05 21:41:01,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:41:01,693 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 21:41:01,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:41:01,799 INFO L225 Difference]: With dead ends: 39804 [2021-06-05 21:41:01,799 INFO L226 Difference]: Without dead ends: 39780 [2021-06-05 21:41:01,799 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 118.1ms TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:41:01,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39780 states. [2021-06-05 21:41:02,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39780 to 25794. [2021-06-05 21:41:02,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25794 states, 25793 states have (on average 4.165161090218276) internal successors, (107432), 25793 states have internal predecessors, (107432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:02,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25794 states to 25794 states and 107432 transitions. [2021-06-05 21:41:02,693 INFO L78 Accepts]: Start accepts. Automaton has 25794 states and 107432 transitions. Word has length 28 [2021-06-05 21:41:02,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:41:02,693 INFO L482 AbstractCegarLoop]: Abstraction has 25794 states and 107432 transitions. [2021-06-05 21:41:02,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:02,693 INFO L276 IsEmpty]: Start isEmpty. Operand 25794 states and 107432 transitions. [2021-06-05 21:41:02,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 21:41:02,749 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:41:02,749 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:41:02,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:41:02,950 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:41:02,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:41:02,950 INFO L82 PathProgramCache]: Analyzing trace with hash 2007520536, now seen corresponding path program 18 times [2021-06-05 21:41:02,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:41:02,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542900464] [2021-06-05 21:41:02,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:41:02,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:41:02,974 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:41:02,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:41:02,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542900464] [2021-06-05 21:41:02,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542900464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:41:02,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087051333] [2021-06-05 21:41:02,975 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:41:03,001 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:41:03,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:41:03,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:41:03,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:41:03,067 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:41:03,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087051333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:41:03,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:41:03,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-06-05 21:41:03,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784992466] [2021-06-05 21:41:03,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:41:03,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:41:03,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:41:03,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:41:03,069 INFO L87 Difference]: Start difference. First operand 25794 states and 107432 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:04,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:41:04,017 INFO L93 Difference]: Finished difference Result 48289 states and 195910 transitions. [2021-06-05 21:41:04,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 21:41:04,017 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 21:41:04,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:41:04,174 INFO L225 Difference]: With dead ends: 48289 [2021-06-05 21:41:04,174 INFO L226 Difference]: Without dead ends: 48289 [2021-06-05 21:41:04,175 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 188.0ms TimeCoverageRelationStatistics Valid=185, Invalid=745, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:41:04,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48289 states. [2021-06-05 21:41:04,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48289 to 25964. [2021-06-05 21:41:04,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25964 states, 25963 states have (on average 4.164272233563148) internal successors, (108117), 25963 states have internal predecessors, (108117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:05,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25964 states to 25964 states and 108117 transitions. [2021-06-05 21:41:05,240 INFO L78 Accepts]: Start accepts. Automaton has 25964 states and 108117 transitions. Word has length 28 [2021-06-05 21:41:05,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:41:05,240 INFO L482 AbstractCegarLoop]: Abstraction has 25964 states and 108117 transitions. [2021-06-05 21:41:05,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:05,240 INFO L276 IsEmpty]: Start isEmpty. Operand 25964 states and 108117 transitions. [2021-06-05 21:41:05,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 21:41:05,302 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:41:05,303 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:41:05,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 21:41:05,503 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:41:05,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:41:05,504 INFO L82 PathProgramCache]: Analyzing trace with hash -123184291, now seen corresponding path program 19 times [2021-06-05 21:41:05,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:41:05,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144705309] [2021-06-05 21:41:05,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:41:05,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:41:05,528 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:41:05,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:41:05,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144705309] [2021-06-05 21:41:05,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144705309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:41:05,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022779088] [2021-06-05 21:41:05,529 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:41:05,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:41:05,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:41:05,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:41:05,615 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:41:05,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022779088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:41:05,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:41:05,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-06-05 21:41:05,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924299944] [2021-06-05 21:41:05,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:41:05,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:41:05,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:41:05,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:41:05,616 INFO L87 Difference]: Start difference. First operand 25964 states and 108117 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:06,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:41:06,256 INFO L93 Difference]: Finished difference Result 47194 states and 183148 transitions. [2021-06-05 21:41:06,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 21:41:06,256 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 21:41:06,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:41:06,559 INFO L225 Difference]: With dead ends: 47194 [2021-06-05 21:41:06,559 INFO L226 Difference]: Without dead ends: 47098 [2021-06-05 21:41:06,559 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 203.7ms TimeCoverageRelationStatistics Valid=211, Invalid=781, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:41:06,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47098 states. [2021-06-05 21:41:07,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47098 to 25964. [2021-06-05 21:41:07,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25964 states, 25963 states have (on average 4.16381003736086) internal successors, (108105), 25963 states have internal predecessors, (108105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:07,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25964 states to 25964 states and 108105 transitions. [2021-06-05 21:41:07,596 INFO L78 Accepts]: Start accepts. Automaton has 25964 states and 108105 transitions. Word has length 28 [2021-06-05 21:41:07,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:41:07,597 INFO L482 AbstractCegarLoop]: Abstraction has 25964 states and 108105 transitions. [2021-06-05 21:41:07,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:07,597 INFO L276 IsEmpty]: Start isEmpty. Operand 25964 states and 108105 transitions. [2021-06-05 21:41:07,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 21:41:07,655 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:41:07,655 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:41:07,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:41:07,856 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:41:07,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:41:07,856 INFO L82 PathProgramCache]: Analyzing trace with hash 740063358, now seen corresponding path program 20 times [2021-06-05 21:41:07,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:41:07,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453130727] [2021-06-05 21:41:07,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:41:07,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:41:07,883 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:41:07,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:41:07,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453130727] [2021-06-05 21:41:07,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453130727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:41:07,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548192970] [2021-06-05 21:41:07,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:41:07,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:41:07,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:41:07,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:41:07,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:41:07,972 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:41:07,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548192970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:41:07,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:41:07,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 21:41:07,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989416880] [2021-06-05 21:41:07,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:41:07,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:41:07,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:41:07,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:41:07,974 INFO L87 Difference]: Start difference. First operand 25964 states and 108105 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:08,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:41:08,772 INFO L93 Difference]: Finished difference Result 38914 states and 158503 transitions. [2021-06-05 21:41:08,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 21:41:08,772 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 21:41:08,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:41:08,886 INFO L225 Difference]: With dead ends: 38914 [2021-06-05 21:41:08,886 INFO L226 Difference]: Without dead ends: 38914 [2021-06-05 21:41:08,886 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 292.1ms TimeCoverageRelationStatistics Valid=267, Invalid=923, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 21:41:09,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38914 states. [2021-06-05 21:41:09,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38914 to 26620. [2021-06-05 21:41:09,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26620 states, 26619 states have (on average 4.1402381757391336) internal successors, (110209), 26619 states have internal predecessors, (110209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:09,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26620 states to 26620 states and 110209 transitions. [2021-06-05 21:41:09,701 INFO L78 Accepts]: Start accepts. Automaton has 26620 states and 110209 transitions. Word has length 28 [2021-06-05 21:41:09,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:41:09,701 INFO L482 AbstractCegarLoop]: Abstraction has 26620 states and 110209 transitions. [2021-06-05 21:41:09,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:09,701 INFO L276 IsEmpty]: Start isEmpty. Operand 26620 states and 110209 transitions. [2021-06-05 21:41:09,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 21:41:09,758 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:41:09,758 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:41:09,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:41:09,958 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:41:09,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:41:09,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1153142681, now seen corresponding path program 21 times [2021-06-05 21:41:09,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:41:09,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862391592] [2021-06-05 21:41:09,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:41:09,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:41:09,995 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:41:09,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:41:09,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862391592] [2021-06-05 21:41:09,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862391592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:41:09,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567680539] [2021-06-05 21:41:09,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:41:10,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:41:10,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:41:10,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:41:10,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:41:10,223 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:41:10,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567680539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:41:10,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:41:10,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 21:41:10,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687994310] [2021-06-05 21:41:10,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:41:10,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:41:10,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:41:10,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:41:10,224 INFO L87 Difference]: Start difference. First operand 26620 states and 110209 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:10,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:41:10,813 INFO L93 Difference]: Finished difference Result 41610 states and 161108 transitions. [2021-06-05 21:41:10,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:41:10,813 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 21:41:10,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:41:10,925 INFO L225 Difference]: With dead ends: 41610 [2021-06-05 21:41:10,925 INFO L226 Difference]: Without dead ends: 41514 [2021-06-05 21:41:10,925 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 206.0ms TimeCoverageRelationStatistics Valid=198, Invalid=732, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:41:10,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41514 states. [2021-06-05 21:41:11,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41514 to 27244. [2021-06-05 21:41:11,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27244 states, 27243 states have (on average 4.125646955181147) internal successors, (112395), 27243 states have internal predecessors, (112395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:11,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27244 states to 27244 states and 112395 transitions. [2021-06-05 21:41:11,798 INFO L78 Accepts]: Start accepts. Automaton has 27244 states and 112395 transitions. Word has length 28 [2021-06-05 21:41:11,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:41:11,798 INFO L482 AbstractCegarLoop]: Abstraction has 27244 states and 112395 transitions. [2021-06-05 21:41:11,798 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:11,798 INFO L276 IsEmpty]: Start isEmpty. Operand 27244 states and 112395 transitions. [2021-06-05 21:41:11,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 21:41:11,852 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:41:11,852 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:41:12,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-06-05 21:41:12,053 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:41:12,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:41:12,053 INFO L82 PathProgramCache]: Analyzing trace with hash -73330929, now seen corresponding path program 22 times [2021-06-05 21:41:12,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:41:12,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129241058] [2021-06-05 21:41:12,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:41:12,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:41:12,088 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:41:12,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:41:12,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129241058] [2021-06-05 21:41:12,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129241058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:41:12,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796156735] [2021-06-05 21:41:12,088 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:41:12,114 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:41:12,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:41:12,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:41:12,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:41:12,201 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:41:12,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796156735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:41:12,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:41:12,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 21:41:12,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923943652] [2021-06-05 21:41:12,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:41:12,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:41:12,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:41:12,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:41:12,202 INFO L87 Difference]: Start difference. First operand 27244 states and 112395 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:12,809 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2021-06-05 21:41:13,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:41:13,081 INFO L93 Difference]: Finished difference Result 48209 states and 191672 transitions. [2021-06-05 21:41:13,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 21:41:13,081 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 21:41:13,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:41:13,207 INFO L225 Difference]: With dead ends: 48209 [2021-06-05 21:41:13,208 INFO L226 Difference]: Without dead ends: 48209 [2021-06-05 21:41:13,208 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 349.5ms TimeCoverageRelationStatistics Valid=215, Invalid=777, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:41:13,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48209 states. [2021-06-05 21:41:13,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48209 to 26904. [2021-06-05 21:41:13,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26904 states, 26903 states have (on average 4.114225179348028) internal successors, (110685), 26903 states have internal predecessors, (110685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:14,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26904 states to 26904 states and 110685 transitions. [2021-06-05 21:41:14,069 INFO L78 Accepts]: Start accepts. Automaton has 26904 states and 110685 transitions. Word has length 28 [2021-06-05 21:41:14,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:41:14,069 INFO L482 AbstractCegarLoop]: Abstraction has 26904 states and 110685 transitions. [2021-06-05 21:41:14,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:14,069 INFO L276 IsEmpty]: Start isEmpty. Operand 26904 states and 110685 transitions. [2021-06-05 21:41:14,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 21:41:14,120 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:41:14,120 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:41:14,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:41:14,333 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:41:14,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:41:14,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1673828536, now seen corresponding path program 23 times [2021-06-05 21:41:14,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:41:14,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858165154] [2021-06-05 21:41:14,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:41:14,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:41:14,356 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:41:14,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:41:14,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858165154] [2021-06-05 21:41:14,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858165154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:41:14,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418194134] [2021-06-05 21:41:14,357 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:41:14,380 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:41:14,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:41:14,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:41:14,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:41:14,454 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:41:14,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418194134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:41:14,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:41:14,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 21:41:14,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912525416] [2021-06-05 21:41:14,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:41:14,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:41:14,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:41:14,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:41:14,455 INFO L87 Difference]: Start difference. First operand 26904 states and 110685 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:15,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:41:15,028 INFO L93 Difference]: Finished difference Result 35478 states and 139558 transitions. [2021-06-05 21:41:15,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:41:15,029 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 21:41:15,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:41:15,343 INFO L225 Difference]: With dead ends: 35478 [2021-06-05 21:41:15,343 INFO L226 Difference]: Without dead ends: 35428 [2021-06-05 21:41:15,343 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 143.5ms TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:41:15,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35428 states. [2021-06-05 21:41:15,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35428 to 26239. [2021-06-05 21:41:15,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26239 states, 26238 states have (on average 4.115595700891836) internal successors, (107985), 26238 states have internal predecessors, (107985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:15,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26239 states to 26239 states and 107985 transitions. [2021-06-05 21:41:15,966 INFO L78 Accepts]: Start accepts. Automaton has 26239 states and 107985 transitions. Word has length 28 [2021-06-05 21:41:15,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:41:15,966 INFO L482 AbstractCegarLoop]: Abstraction has 26239 states and 107985 transitions. [2021-06-05 21:41:15,966 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:15,966 INFO L276 IsEmpty]: Start isEmpty. Operand 26239 states and 107985 transitions. [2021-06-05 21:41:16,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 21:41:16,020 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:41:16,020 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:41:16,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-05 21:41:16,220 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:41:16,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:41:16,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1595574120, now seen corresponding path program 24 times [2021-06-05 21:41:16,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:41:16,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095501348] [2021-06-05 21:41:16,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:41:16,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:41:16,283 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:41:16,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:41:16,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095501348] [2021-06-05 21:41:16,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095501348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:41:16,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162853229] [2021-06-05 21:41:16,283 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:41:16,306 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:41:16,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:41:16,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:41:16,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:41:16,839 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:41:16,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162853229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:41:16,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:41:16,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10] total 10 [2021-06-05 21:41:16,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005624384] [2021-06-05 21:41:16,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:41:16,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:41:16,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:41:16,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:41:16,841 INFO L87 Difference]: Start difference. First operand 26239 states and 107985 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:17,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:41:17,408 INFO L93 Difference]: Finished difference Result 29258 states and 119012 transitions. [2021-06-05 21:41:17,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:41:17,409 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 21:41:17,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:41:17,490 INFO L225 Difference]: With dead ends: 29258 [2021-06-05 21:41:17,490 INFO L226 Difference]: Without dead ends: 29122 [2021-06-05 21:41:17,490 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 330.3ms TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:41:17,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29122 states. [2021-06-05 21:41:18,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29122 to 26985. [2021-06-05 21:41:18,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26985 states, 26984 states have (on average 4.111139934776164) internal successors, (110935), 26984 states have internal predecessors, (110935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:18,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26985 states to 26985 states and 110935 transitions. [2021-06-05 21:41:18,158 INFO L78 Accepts]: Start accepts. Automaton has 26985 states and 110935 transitions. Word has length 31 [2021-06-05 21:41:18,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:41:18,158 INFO L482 AbstractCegarLoop]: Abstraction has 26985 states and 110935 transitions. [2021-06-05 21:41:18,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:18,158 INFO L276 IsEmpty]: Start isEmpty. Operand 26985 states and 110935 transitions. [2021-06-05 21:41:18,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 21:41:18,209 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:41:18,209 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:41:18,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:41:18,410 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:41:18,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:41:18,410 INFO L82 PathProgramCache]: Analyzing trace with hash -457978980, now seen corresponding path program 25 times [2021-06-05 21:41:18,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:41:18,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637427740] [2021-06-05 21:41:18,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:41:18,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:41:18,455 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:41:18,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:41:18,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637427740] [2021-06-05 21:41:18,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637427740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:41:18,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692305068] [2021-06-05 21:41:18,456 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:41:18,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:41:18,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:41:18,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:41:18,701 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:41:18,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692305068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:41:18,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:41:18,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10] total 11 [2021-06-05 21:41:18,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975909648] [2021-06-05 21:41:18,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:41:18,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:41:18,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:41:18,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:41:18,702 INFO L87 Difference]: Start difference. First operand 26985 states and 110935 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:19,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:41:19,520 INFO L93 Difference]: Finished difference Result 30378 states and 123415 transitions. [2021-06-05 21:41:19,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:41:19,520 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 21:41:19,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:41:19,605 INFO L225 Difference]: With dead ends: 30378 [2021-06-05 21:41:19,605 INFO L226 Difference]: Without dead ends: 30174 [2021-06-05 21:41:19,605 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 145.8ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:41:19,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30174 states. [2021-06-05 21:41:20,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30174 to 27681. [2021-06-05 21:41:20,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27681 states, 27680 states have (on average 4.11296965317919) internal successors, (113847), 27680 states have internal predecessors, (113847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:20,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27681 states to 27681 states and 113847 transitions. [2021-06-05 21:41:20,153 INFO L78 Accepts]: Start accepts. Automaton has 27681 states and 113847 transitions. Word has length 31 [2021-06-05 21:41:20,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:41:20,153 INFO L482 AbstractCegarLoop]: Abstraction has 27681 states and 113847 transitions. [2021-06-05 21:41:20,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:41:20,154 INFO L276 IsEmpty]: Start isEmpty. Operand 27681 states and 113847 transitions. [2021-06-05 21:41:20,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 21:41:20,206 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:41:20,206 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:41:20,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-05 21:41:20,407 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:41:20,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:41:20,407 INFO L82 PathProgramCache]: Analyzing trace with hash 383912552, now seen corresponding path program 26 times [2021-06-05 21:41:20,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:41:20,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056084500] [2021-06-05 21:41:20,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:41:20,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:41:20,487 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:41:20,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:41:20,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056084500] [2021-06-05 21:41:20,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056084500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:41:20,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676174324] [2021-06-05 21:41:20,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:41:20,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:41:20,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:41:20,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:41:20,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:41:20,717 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2021-06-05 21:41:20,903 WARN L348 FreeRefinementEngine]: Global settings require throwing the following exception [2021-06-05 21:41:21,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-05 21:41:21,109 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Possible infinite loop detected aux_div_aux_div_aux_mod_x1_24_53_119 already exists at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.tryToHandleDivModSubterm(SolveForSubjectUtils.java:198) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.findTreatableDivModSubterm(SolveForSubjectUtils.java:585) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.findTreatableDivModSubterm(SolveForSubjectUtils.java:573) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.solveForSubject(SolveForSubjectUtils.java:76) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.PolynomialRelation.solveForSubject(PolynomialRelation.java:451) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.tryToHandleDivModSubterm(SolveForSubjectUtils.java:212) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.findTreatableDivModSubterm(SolveForSubjectUtils.java:585) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.findTreatableDivModSubterm(SolveForSubjectUtils.java:573) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.solveForSubject(SolveForSubjectUtils.java:76) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.PolynomialRelation.solveForSubject(PolynomialRelation.java:451) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$DerHelperMcsbr.solveForSubject(DualJunctionDer.java:408) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$DerHelperMcsbr.solveForSubject(DualJunctionDer.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$IDerHelper.findBestReplacementSbr(DualJunctionDer.java:312) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$IDerHelper.tryToEliminateSbr(DualJunctionDer.java:328) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryToEliminateOne(DualJunctionDer.java:231) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryExhaustivelyToEliminate(DualJunctionDer.java:198) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryToEliminateOne(DualJunctionDer.java:182) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryExhaustivelyToEliminate(DualJunctionDer.java:149) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryToEliminate(DualJunctionDer.java:127) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:869) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:835) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:753) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:384) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:316) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.convert(QuantifierPusher.java:227) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.cacheConvert(TermTransformer.java:131) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$Convert.walk(TermTransformer.java:79) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:272) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:144) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:166) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp$LiveVariablesPostprocessorForward.postprocess(TraceCheckSpWp.java:539) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:440) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:201) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:297) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:190) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:180) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:643) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:439) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:374) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:69) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:63) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:364) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:293) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:238) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-06-05 21:41:21,114 INFO L168 Benchmark]: Toolchain (without parser) took 77131.44 ms. Allocated memory was 364.9 MB in the beginning and 12.1 GB in the end (delta: 11.7 GB). Free memory was 344.3 MB in the beginning and 9.1 GB in the end (delta: -8.7 GB). Peak memory consumption was 2.9 GB. Max. memory is 16.0 GB. [2021-06-05 21:41:21,114 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 364.9 MB. Free memory is still 345.3 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 21:41:21,115 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.47 ms. Allocated memory is still 364.9 MB. Free memory was 344.2 MB in the beginning and 342.7 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 21:41:21,115 INFO L168 Benchmark]: Boogie Preprocessor took 12.12 ms. Allocated memory is still 364.9 MB. Free memory was 342.7 MB in the beginning and 341.8 MB in the end (delta: 905.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 21:41:21,115 INFO L168 Benchmark]: RCFGBuilder took 284.08 ms. Allocated memory is still 364.9 MB. Free memory was 341.7 MB in the beginning and 329.9 MB in the end (delta: 11.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-06-05 21:41:21,115 INFO L168 Benchmark]: TraceAbstraction took 76806.05 ms. Allocated memory was 364.9 MB in the beginning and 12.1 GB in the end (delta: 11.7 GB). Free memory was 329.5 MB in the beginning and 9.1 GB in the end (delta: -8.8 GB). Peak memory consumption was 2.9 GB. Max. memory is 16.0 GB. [2021-06-05 21:41:21,115 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 0.10 ms. Allocated memory is still 364.9 MB. Free memory is still 345.3 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 18.47 ms. Allocated memory is still 364.9 MB. Free memory was 344.2 MB in the beginning and 342.7 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 12.12 ms. Allocated memory is still 364.9 MB. Free memory was 342.7 MB in the beginning and 341.8 MB in the end (delta: 905.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 284.08 ms. Allocated memory is still 364.9 MB. Free memory was 341.7 MB in the beginning and 329.9 MB in the end (delta: 11.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 76806.05 ms. Allocated memory was 364.9 MB in the beginning and 12.1 GB in the end (delta: 11.7 GB). Free memory was 329.5 MB in the beginning and 9.1 GB in the end (delta: -8.8 GB). Peak memory consumption was 2.9 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Possible infinite loop detected aux_div_aux_div_aux_mod_x1_24_53_119 already exists de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Possible infinite loop detected aux_div_aux_div_aux_mod_x1_24_53_119 already exists: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.tryToHandleDivModSubterm(SolveForSubjectUtils.java:198) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...