/usr/bin/java -Xmx8000000000 -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-a47a088281b0b97d17910950432b7c5b5bc3adeb-a47a088 [2021-07-13 19:26:21,792 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-13 19:26:21,794 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-13 19:26:21,823 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-13 19:26:21,869 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 [2021-07-13 19:26:21,896 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-13 19:26:21,896 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-13 19:26:21,897 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-13 19:26:21,897 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-13 19:26:21,899 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-13 19:26:21,899 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-13 19:26:21,899 INFO L138 SettingsManager]: * Use SBE=true [2021-07-13 19:26:21,899 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-13 19:26:21,899 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-13 19:26:21,899 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-13 19:26:21,900 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-13 19:26:21,900 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-13 19:26:21,900 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-13 19:26:21,900 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-13 19:26:21,901 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-13 19:26:21,901 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-13 19:26:21,901 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-13 19:26:21,901 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-13 19:26:21,901 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-13 19:26:21,901 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-13 19:26:21,901 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-13 19:26:21,901 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-13 19:26:21,902 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-13 19:26:21,902 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 19:26:21,902 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-13 19:26:21,902 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-13 19:26:21,919 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-13 19:26:21,919 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-13 19:26:21,919 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-13 19:26:21,919 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-13 19:26:21,920 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-13 19:26:21,920 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-13 19:26:22,158 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-13 19:26:22,178 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-13 19:26:22,180 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-13 19:26:22,181 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-13 19:26:22,182 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-13 19:26:22,182 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp2x4.wvr.bpl [2021-07-13 19:26:22,182 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp2x4.wvr.bpl' [2021-07-13 19:26:22,202 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-13 19:26:22,203 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-13 19:26:22,204 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-13 19:26:22,204 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-13 19:26:22,204 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-13 19:26:22,212 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:26:22" (1/1) ... [2021-07-13 19:26:22,218 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:26:22" (1/1) ... [2021-07-13 19:26:22,223 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-13 19:26:22,224 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-13 19:26:22,224 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-13 19:26:22,225 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-13 19:26:22,230 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:26:22" (1/1) ... [2021-07-13 19:26:22,230 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:26:22" (1/1) ... [2021-07-13 19:26:22,231 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:26:22" (1/1) ... [2021-07-13 19:26:22,231 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:26:22" (1/1) ... [2021-07-13 19:26:22,233 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:26:22" (1/1) ... [2021-07-13 19:26:22,237 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:26:22" (1/1) ... [2021-07-13 19:26:22,237 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:26:22" (1/1) ... [2021-07-13 19:26:22,238 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-13 19:26:22,239 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-13 19:26:22,239 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-13 19:26:22,239 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-13 19:26:22,240 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:26:22" (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 [2021-07-13 19:26:22,288 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-13 19:26:22,288 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-13 19:26:22,289 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-13 19:26:22,289 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-13 19:26:22,289 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-13 19:26:22,289 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-13 19:26:22,289 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-13 19:26:22,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-13 19:26:22,289 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-13 19:26:22,289 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-07-13 19:26:22,290 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-07-13 19:26:22,290 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-07-13 19:26:22,291 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-07-13 19:26:22,291 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-07-13 19:26:22,291 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-07-13 19:26:22,291 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-13 19:26:22,440 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-13 19:26:22,441 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-13 19:26:22,442 INFO L202 PluginConnector]: Adding new model exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 07:26:22 BoogieIcfgContainer [2021-07-13 19:26:22,442 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-13 19:26:22,443 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-13 19:26:22,443 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-13 19:26:22,445 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-13 19:26:22,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:26:22" (1/2) ... [2021-07-13 19:26:22,445 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@389735a5 and model type exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 07:26:22, skipping insertion in model container [2021-07-13 19:26:22,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 07:26:22" (2/2) ... [2021-07-13 19:26:22,446 INFO L111 eAbstractionObserver]: Analyzing ICFG exp2x4.wvr.bpl [2021-07-13 19:26:22,450 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-13 19:26:22,450 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-13 19:26:22,450 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-13 19:26:22,450 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-13 19:26:22,482 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-07-13 19:26:22,497 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-07-13 19:26:22,509 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 19:26:22,509 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 19:26:22,509 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 19:26:22,510 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 19:26:22,510 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 19:26:22,510 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 19:26:22,510 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 19:26:22,510 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-13 19:26:22,516 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 46 places, 37 transitions, 106 flow [2021-07-13 19:26:22,650 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 940 states, 939 states have (on average 3.913738019169329) internal successors, (3675), 939 states have internal predecessors, (3675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:22,655 INFO L276 IsEmpty]: Start isEmpty. Operand has 940 states, 939 states have (on average 3.913738019169329) internal successors, (3675), 939 states have internal predecessors, (3675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:22,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:26:22,672 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:22,672 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:22,672 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:22,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:22,676 INFO L82 PathProgramCache]: Analyzing trace with hash 500910984, now seen corresponding path program 1 times [2021-07-13 19:26:22,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:22,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649018480] [2021-07-13 19:26:22,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:22,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:22,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:22,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:22,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649018480] [2021-07-13 19:26:22,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649018480] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:26:22,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:26:22,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-13 19:26:22,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517125135] [2021-07-13 19:26:22,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 19:26:22,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:22,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 19:26:22,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 19:26:22,811 INFO L87 Difference]: Start difference. First operand has 940 states, 939 states have (on average 3.913738019169329) internal successors, (3675), 939 states have internal predecessors, (3675), 0 states have call successors, (0), 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) [2021-07-13 19:26:22,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:22,908 INFO L93 Difference]: Finished difference Result 1365 states and 5324 transitions. [2021-07-13 19:26:22,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 19:26:22,909 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 [2021-07-13 19:26:22,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:22,934 INFO L225 Difference]: With dead ends: 1365 [2021-07-13 19:26:22,935 INFO L226 Difference]: Without dead ends: 1334 [2021-07-13 19:26:22,936 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 19:26:22,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1334 states. [2021-07-13 19:26:23,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1334 to 1069. [2021-07-13 19:26:23,032 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) [2021-07-13 19:26:23,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1069 states to 1069 states and 4169 transitions. [2021-07-13 19:26:23,038 INFO L78 Accepts]: Start accepts. Automaton has 1069 states and 4169 transitions. Word has length 19 [2021-07-13 19:26:23,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:23,038 INFO L482 AbstractCegarLoop]: Abstraction has 1069 states and 4169 transitions. [2021-07-13 19:26:23,038 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) [2021-07-13 19:26:23,039 INFO L276 IsEmpty]: Start isEmpty. Operand 1069 states and 4169 transitions. [2021-07-13 19:26:23,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:26:23,042 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:23,042 INFO L508 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] [2021-07-13 19:26:23,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-13 19:26:23,042 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:23,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:23,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1942329299, now seen corresponding path program 1 times [2021-07-13 19:26:23,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:23,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825193355] [2021-07-13 19:26:23,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:23,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:23,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:23,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:23,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825193355] [2021-07-13 19:26:23,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825193355] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:23,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919162758] [2021-07-13 19:26:23,083 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 [2021-07-13 19:26:23,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:23,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2021-07-13 19:26:23,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:23,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:23,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919162758] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:23,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:23,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-07-13 19:26:23,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549044009] [2021-07-13 19:26:23,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 19:26:23,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:23,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 19:26:23,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:26:23,221 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) [2021-07-13 19:26:23,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:23,315 INFO L93 Difference]: Finished difference Result 2313 states and 8847 transitions. [2021-07-13 19:26:23,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:26:23,315 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 [2021-07-13 19:26:23,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:23,327 INFO L225 Difference]: With dead ends: 2313 [2021-07-13 19:26:23,327 INFO L226 Difference]: Without dead ends: 2313 [2021-07-13 19:26:23,328 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:26:23,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2313 states. [2021-07-13 19:26:23,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2313 to 1246. [2021-07-13 19:26:23,376 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) [2021-07-13 19:26:23,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 4944 transitions. [2021-07-13 19:26:23,382 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 4944 transitions. Word has length 22 [2021-07-13 19:26:23,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:23,382 INFO L482 AbstractCegarLoop]: Abstraction has 1246 states and 4944 transitions. [2021-07-13 19:26:23,383 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) [2021-07-13 19:26:23,383 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 4944 transitions. [2021-07-13 19:26:23,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:26:23,387 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:23,387 INFO L508 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] [2021-07-13 19:26:23,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-07-13 19:26:23,605 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:23,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:23,605 INFO L82 PathProgramCache]: Analyzing trace with hash -977644340, now seen corresponding path program 1 times [2021-07-13 19:26:23,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:23,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793732418] [2021-07-13 19:26:23,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:23,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:23,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:23,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:23,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793732418] [2021-07-13 19:26:23,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793732418] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:23,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135111432] [2021-07-13 19:26:23,647 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 [2021-07-13 19:26:23,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:23,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2021-07-13 19:26:23,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:23,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:23,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135111432] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:23,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:23,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-07-13 19:26:23,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601893745] [2021-07-13 19:26:23,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 19:26:23,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:23,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 19:26:23,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:26:23,731 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) [2021-07-13 19:26:23,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:23,807 INFO L93 Difference]: Finished difference Result 2518 states and 9792 transitions. [2021-07-13 19:26:23,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:26:23,808 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 [2021-07-13 19:26:23,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:23,822 INFO L225 Difference]: With dead ends: 2518 [2021-07-13 19:26:23,823 INFO L226 Difference]: Without dead ends: 2518 [2021-07-13 19:26:23,823 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:26:23,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2518 states. [2021-07-13 19:26:23,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2518 to 1535. [2021-07-13 19:26:23,872 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) [2021-07-13 19:26:23,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1535 states to 1535 states and 6207 transitions. [2021-07-13 19:26:23,879 INFO L78 Accepts]: Start accepts. Automaton has 1535 states and 6207 transitions. Word has length 22 [2021-07-13 19:26:23,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:23,879 INFO L482 AbstractCegarLoop]: Abstraction has 1535 states and 6207 transitions. [2021-07-13 19:26:23,879 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) [2021-07-13 19:26:23,880 INFO L276 IsEmpty]: Start isEmpty. Operand 1535 states and 6207 transitions. [2021-07-13 19:26:23,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:26:23,884 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:23,885 INFO L508 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] [2021-07-13 19:26:24,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:24,103 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:24,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:24,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1083698467, now seen corresponding path program 1 times [2021-07-13 19:26:24,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:24,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56762582] [2021-07-13 19:26:24,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:24,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:24,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:24,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:24,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56762582] [2021-07-13 19:26:24,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56762582] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:26:24,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:26:24,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 19:26:24,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60521252] [2021-07-13 19:26:24,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 19:26:24,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:24,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 19:26:24,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:26:24,143 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) [2021-07-13 19:26:24,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:24,205 INFO L93 Difference]: Finished difference Result 2143 states and 8381 transitions. [2021-07-13 19:26:24,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:26:24,206 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 [2021-07-13 19:26:24,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:24,217 INFO L225 Difference]: With dead ends: 2143 [2021-07-13 19:26:24,217 INFO L226 Difference]: Without dead ends: 2120 [2021-07-13 19:26:24,217 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:26:24,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2120 states. [2021-07-13 19:26:24,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2120 to 1600. [2021-07-13 19:26:24,254 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) [2021-07-13 19:26:24,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1600 states to 1600 states and 6394 transitions. [2021-07-13 19:26:24,260 INFO L78 Accepts]: Start accepts. Automaton has 1600 states and 6394 transitions. Word has length 22 [2021-07-13 19:26:24,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:24,260 INFO L482 AbstractCegarLoop]: Abstraction has 1600 states and 6394 transitions. [2021-07-13 19:26:24,261 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) [2021-07-13 19:26:24,261 INFO L276 IsEmpty]: Start isEmpty. Operand 1600 states and 6394 transitions. [2021-07-13 19:26:24,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:26:24,265 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:24,265 INFO L508 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] [2021-07-13 19:26:24,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-13 19:26:24,266 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:24,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:24,266 INFO L82 PathProgramCache]: Analyzing trace with hash 269710136, now seen corresponding path program 1 times [2021-07-13 19:26:24,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:24,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700429972] [2021-07-13 19:26:24,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:24,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:24,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:24,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:24,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700429972] [2021-07-13 19:26:24,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700429972] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:26:24,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:26:24,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 19:26:24,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143745759] [2021-07-13 19:26:24,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 19:26:24,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:24,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 19:26:24,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:26:24,300 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) [2021-07-13 19:26:24,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:24,352 INFO L93 Difference]: Finished difference Result 2353 states and 9126 transitions. [2021-07-13 19:26:24,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:26:24,353 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 [2021-07-13 19:26:24,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:24,365 INFO L225 Difference]: With dead ends: 2353 [2021-07-13 19:26:24,365 INFO L226 Difference]: Without dead ends: 2337 [2021-07-13 19:26:24,366 INFO L764 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 [2021-07-13 19:26:24,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2337 states. [2021-07-13 19:26:24,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2337 to 1670. [2021-07-13 19:26:24,417 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) [2021-07-13 19:26:24,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1670 states to 1670 states and 6613 transitions. [2021-07-13 19:26:24,423 INFO L78 Accepts]: Start accepts. Automaton has 1670 states and 6613 transitions. Word has length 22 [2021-07-13 19:26:24,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:24,423 INFO L482 AbstractCegarLoop]: Abstraction has 1670 states and 6613 transitions. [2021-07-13 19:26:24,423 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) [2021-07-13 19:26:24,423 INFO L276 IsEmpty]: Start isEmpty. Operand 1670 states and 6613 transitions. [2021-07-13 19:26:24,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:26:24,427 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:24,427 INFO L508 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] [2021-07-13 19:26:24,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-07-13 19:26:24,428 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:24,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:24,428 INFO L82 PathProgramCache]: Analyzing trace with hash 121894375, now seen corresponding path program 2 times [2021-07-13 19:26:24,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:24,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590544465] [2021-07-13 19:26:24,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:24,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:24,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:24,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:24,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590544465] [2021-07-13 19:26:24,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590544465] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:26:24,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:26:24,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 19:26:24,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415688059] [2021-07-13 19:26:24,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 19:26:24,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:24,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 19:26:24,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:26:24,493 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) [2021-07-13 19:26:24,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:24,570 INFO L93 Difference]: Finished difference Result 2314 states and 9023 transitions. [2021-07-13 19:26:24,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:26:24,570 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 [2021-07-13 19:26:24,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:24,594 INFO L225 Difference]: With dead ends: 2314 [2021-07-13 19:26:24,595 INFO L226 Difference]: Without dead ends: 2314 [2021-07-13 19:26:24,595 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:26:24,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2314 states. [2021-07-13 19:26:24,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2314 to 1847. [2021-07-13 19:26:24,635 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) [2021-07-13 19:26:24,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1847 states to 1847 states and 7344 transitions. [2021-07-13 19:26:24,641 INFO L78 Accepts]: Start accepts. Automaton has 1847 states and 7344 transitions. Word has length 22 [2021-07-13 19:26:24,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:24,641 INFO L482 AbstractCegarLoop]: Abstraction has 1847 states and 7344 transitions. [2021-07-13 19:26:24,641 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) [2021-07-13 19:26:24,641 INFO L276 IsEmpty]: Start isEmpty. Operand 1847 states and 7344 transitions. [2021-07-13 19:26:24,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:26:24,646 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:24,646 INFO L508 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] [2021-07-13 19:26:24,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-07-13 19:26:24,646 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:24,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:24,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1727272710, now seen corresponding path program 2 times [2021-07-13 19:26:24,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:24,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209757530] [2021-07-13 19:26:24,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:24,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:24,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:24,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:24,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209757530] [2021-07-13 19:26:24,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209757530] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:26:24,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:26:24,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 19:26:24,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086329187] [2021-07-13 19:26:24,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 19:26:24,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:24,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 19:26:24,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:26:24,689 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) [2021-07-13 19:26:24,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:24,736 INFO L93 Difference]: Finished difference Result 2315 states and 8927 transitions. [2021-07-13 19:26:24,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:26:24,737 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 [2021-07-13 19:26:24,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:24,745 INFO L225 Difference]: With dead ends: 2315 [2021-07-13 19:26:24,745 INFO L226 Difference]: Without dead ends: 2297 [2021-07-13 19:26:24,745 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:26:24,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2297 states. [2021-07-13 19:26:24,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2297 to 1919. [2021-07-13 19:26:24,798 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) [2021-07-13 19:26:24,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1919 states to 1919 states and 7569 transitions. [2021-07-13 19:26:24,805 INFO L78 Accepts]: Start accepts. Automaton has 1919 states and 7569 transitions. Word has length 22 [2021-07-13 19:26:24,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:24,805 INFO L482 AbstractCegarLoop]: Abstraction has 1919 states and 7569 transitions. [2021-07-13 19:26:24,805 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) [2021-07-13 19:26:24,805 INFO L276 IsEmpty]: Start isEmpty. Operand 1919 states and 7569 transitions. [2021-07-13 19:26:24,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:26:24,810 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:24,810 INFO L508 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] [2021-07-13 19:26:24,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-07-13 19:26:24,810 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:24,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:24,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1751500668, now seen corresponding path program 2 times [2021-07-13 19:26:24,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:24,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094315465] [2021-07-13 19:26:24,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:24,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:24,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:24,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:24,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094315465] [2021-07-13 19:26:24,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094315465] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:26:24,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:26:24,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 19:26:24,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426152051] [2021-07-13 19:26:24,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 19:26:24,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:24,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 19:26:24,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:26:24,846 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) [2021-07-13 19:26:24,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:24,912 INFO L93 Difference]: Finished difference Result 2879 states and 11172 transitions. [2021-07-13 19:26:24,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:26:24,912 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 [2021-07-13 19:26:24,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:24,921 INFO L225 Difference]: With dead ends: 2879 [2021-07-13 19:26:24,921 INFO L226 Difference]: Without dead ends: 2879 [2021-07-13 19:26:24,922 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:26:24,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2879 states. [2021-07-13 19:26:24,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2879 to 2176. [2021-07-13 19:26:24,991 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) [2021-07-13 19:26:24,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2176 states to 2176 states and 8622 transitions. [2021-07-13 19:26:24,997 INFO L78 Accepts]: Start accepts. Automaton has 2176 states and 8622 transitions. Word has length 22 [2021-07-13 19:26:24,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:24,998 INFO L482 AbstractCegarLoop]: Abstraction has 2176 states and 8622 transitions. [2021-07-13 19:26:24,998 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) [2021-07-13 19:26:24,998 INFO L276 IsEmpty]: Start isEmpty. Operand 2176 states and 8622 transitions. [2021-07-13 19:26:25,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:26:25,006 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:25,006 INFO L508 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] [2021-07-13 19:26:25,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-07-13 19:26:25,006 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:25,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:25,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1947070755, now seen corresponding path program 2 times [2021-07-13 19:26:25,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:25,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241734228] [2021-07-13 19:26:25,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:25,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:25,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:25,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:25,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241734228] [2021-07-13 19:26:25,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241734228] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:26:25,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:26:25,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 19:26:25,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286682022] [2021-07-13 19:26:25,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 19:26:25,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:25,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 19:26:25,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:26:25,037 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) [2021-07-13 19:26:25,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:25,090 INFO L93 Difference]: Finished difference Result 2839 states and 10862 transitions. [2021-07-13 19:26:25,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:26:25,090 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 [2021-07-13 19:26:25,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:25,100 INFO L225 Difference]: With dead ends: 2839 [2021-07-13 19:26:25,100 INFO L226 Difference]: Without dead ends: 2811 [2021-07-13 19:26:25,101 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:26:25,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2811 states. [2021-07-13 19:26:25,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2811 to 2291. [2021-07-13 19:26:25,150 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) [2021-07-13 19:26:25,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2291 states to 2291 states and 9017 transitions. [2021-07-13 19:26:25,157 INFO L78 Accepts]: Start accepts. Automaton has 2291 states and 9017 transitions. Word has length 22 [2021-07-13 19:26:25,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:25,157 INFO L482 AbstractCegarLoop]: Abstraction has 2291 states and 9017 transitions. [2021-07-13 19:26:25,158 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) [2021-07-13 19:26:25,158 INFO L276 IsEmpty]: Start isEmpty. Operand 2291 states and 9017 transitions. [2021-07-13 19:26:25,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:26:25,165 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:25,165 INFO L508 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] [2021-07-13 19:26:25,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-07-13 19:26:25,165 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:25,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:25,166 INFO L82 PathProgramCache]: Analyzing trace with hash 509204595, now seen corresponding path program 1 times [2021-07-13 19:26:25,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:25,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840431335] [2021-07-13 19:26:25,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:25,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:25,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:25,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:25,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840431335] [2021-07-13 19:26:25,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840431335] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:25,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797516461] [2021-07-13 19:26:25,249 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 [2021-07-13 19:26:25,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:25,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:26:25,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:25,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:25,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797516461] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:25,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:25,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 6 [2021-07-13 19:26:25,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828068097] [2021-07-13 19:26:25,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:26:25,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:25,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:26:25,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:26:25,468 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) [2021-07-13 19:26:25,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:25,638 INFO L93 Difference]: Finished difference Result 3791 states and 14505 transitions. [2021-07-13 19:26:25,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:26:25,638 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 [2021-07-13 19:26:25,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:25,651 INFO L225 Difference]: With dead ends: 3791 [2021-07-13 19:26:25,651 INFO L226 Difference]: Without dead ends: 3655 [2021-07-13 19:26:25,652 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 79.6ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:26:25,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3655 states. [2021-07-13 19:26:25,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3655 to 2656. [2021-07-13 19:26:25,721 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) [2021-07-13 19:26:25,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2656 states to 2656 states and 10474 transitions. [2021-07-13 19:26:25,730 INFO L78 Accepts]: Start accepts. Automaton has 2656 states and 10474 transitions. Word has length 25 [2021-07-13 19:26:25,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:25,730 INFO L482 AbstractCegarLoop]: Abstraction has 2656 states and 10474 transitions. [2021-07-13 19:26:25,730 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) [2021-07-13 19:26:25,730 INFO L276 IsEmpty]: Start isEmpty. Operand 2656 states and 10474 transitions. [2021-07-13 19:26:25,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:26:25,736 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:25,736 INFO L508 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] [2021-07-13 19:26:25,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-07-13 19:26:25,953 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:25,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:25,953 INFO L82 PathProgramCache]: Analyzing trace with hash 805897905, now seen corresponding path program 2 times [2021-07-13 19:26:25,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:25,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764357087] [2021-07-13 19:26:25,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:25,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:26,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:26:26,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:26,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764357087] [2021-07-13 19:26:26,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764357087] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:26,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061637936] [2021-07-13 19:26:26,006 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 [2021-07-13 19:26:26,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:26:26,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:26,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:26:26,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:26,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:26,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061637936] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:26,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:26,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 7 [2021-07-13 19:26:26,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918778419] [2021-07-13 19:26:26,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:26:26,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:26,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:26:26,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:26:26,217 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) [2021-07-13 19:26:26,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:26,436 INFO L93 Difference]: Finished difference Result 4004 states and 15422 transitions. [2021-07-13 19:26:26,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:26:26,436 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 [2021-07-13 19:26:26,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:26,449 INFO L225 Difference]: With dead ends: 4004 [2021-07-13 19:26:26,449 INFO L226 Difference]: Without dead ends: 3868 [2021-07-13 19:26:26,450 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 83.8ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:26:26,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3868 states. [2021-07-13 19:26:26,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3868 to 2991. [2021-07-13 19:26:26,504 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) [2021-07-13 19:26:26,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2991 states to 2991 states and 11852 transitions. [2021-07-13 19:26:26,513 INFO L78 Accepts]: Start accepts. Automaton has 2991 states and 11852 transitions. Word has length 25 [2021-07-13 19:26:26,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:26,513 INFO L482 AbstractCegarLoop]: Abstraction has 2991 states and 11852 transitions. [2021-07-13 19:26:26,513 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) [2021-07-13 19:26:26,513 INFO L276 IsEmpty]: Start isEmpty. Operand 2991 states and 11852 transitions. [2021-07-13 19:26:26,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:26:26,520 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:26,520 INFO L508 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] [2021-07-13 19:26:26,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:26,738 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:26,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:26,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1407841221, now seen corresponding path program 3 times [2021-07-13 19:26:26,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:26,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506465908] [2021-07-13 19:26:26,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:26,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:26,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:26:26,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:26,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506465908] [2021-07-13 19:26:26,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506465908] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:26:26,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:26:26,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 19:26:26,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571904633] [2021-07-13 19:26:26,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:26:26,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:26,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:26:26,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:26:26,778 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) [2021-07-13 19:26:26,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:26,880 INFO L93 Difference]: Finished difference Result 4207 states and 16326 transitions. [2021-07-13 19:26:26,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:26:26,880 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 [2021-07-13 19:26:26,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:26,893 INFO L225 Difference]: With dead ends: 4207 [2021-07-13 19:26:26,893 INFO L226 Difference]: Without dead ends: 4139 [2021-07-13 19:26:26,894 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.2ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:26:26,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4139 states. [2021-07-13 19:26:26,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4139 to 3438. [2021-07-13 19:26:26,964 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) [2021-07-13 19:26:26,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3438 states to 3438 states and 13677 transitions. [2021-07-13 19:26:26,974 INFO L78 Accepts]: Start accepts. Automaton has 3438 states and 13677 transitions. Word has length 25 [2021-07-13 19:26:26,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:26,974 INFO L482 AbstractCegarLoop]: Abstraction has 3438 states and 13677 transitions. [2021-07-13 19:26:26,974 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) [2021-07-13 19:26:26,975 INFO L276 IsEmpty]: Start isEmpty. Operand 3438 states and 13677 transitions. [2021-07-13 19:26:26,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:26:26,982 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:26,982 INFO L508 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] [2021-07-13 19:26:26,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-07-13 19:26:26,982 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:26,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:26,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1668338337, now seen corresponding path program 1 times [2021-07-13 19:26:26,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:26,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887628652] [2021-07-13 19:26:26,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:26,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:27,049 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:27,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:27,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887628652] [2021-07-13 19:26:27,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887628652] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:27,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413979874] [2021-07-13 19:26:27,050 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) [2021-07-13 19:26:27,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:27,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:26:27,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:27,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:27,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413979874] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:27,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:27,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 6 [2021-07-13 19:26:27,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143392572] [2021-07-13 19:26:27,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:26:27,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:27,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:26:27,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:26:27,192 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) [2021-07-13 19:26:27,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:27,399 INFO L93 Difference]: Finished difference Result 4729 states and 18310 transitions. [2021-07-13 19:26:27,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:26:27,400 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 [2021-07-13 19:26:27,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:27,414 INFO L225 Difference]: With dead ends: 4729 [2021-07-13 19:26:27,414 INFO L226 Difference]: Without dead ends: 4627 [2021-07-13 19:26:27,414 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 76.3ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:26:27,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4627 states. [2021-07-13 19:26:27,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4627 to 3870. [2021-07-13 19:26:27,483 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) [2021-07-13 19:26:27,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3870 states to 3870 states and 15317 transitions. [2021-07-13 19:26:27,493 INFO L78 Accepts]: Start accepts. Automaton has 3870 states and 15317 transitions. Word has length 25 [2021-07-13 19:26:27,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:27,494 INFO L482 AbstractCegarLoop]: Abstraction has 3870 states and 15317 transitions. [2021-07-13 19:26:27,494 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) [2021-07-13 19:26:27,494 INFO L276 IsEmpty]: Start isEmpty. Operand 3870 states and 15317 transitions. [2021-07-13 19:26:27,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:26:27,502 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:27,502 INFO L508 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] [2021-07-13 19:26:27,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-07-13 19:26:27,718 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:27,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:27,719 INFO L82 PathProgramCache]: Analyzing trace with hash -2074425317, now seen corresponding path program 2 times [2021-07-13 19:26:27,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:27,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656721393] [2021-07-13 19:26:27,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:27,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:27,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:26:27,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:27,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656721393] [2021-07-13 19:26:27,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656721393] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:27,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241558862] [2021-07-13 19:26:27,755 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 [2021-07-13 19:26:27,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:26:27,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:27,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:26:27,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:27,927 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:27,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241558862] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:27,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:27,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 7 [2021-07-13 19:26:27,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970068022] [2021-07-13 19:26:27,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:26:27,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:27,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:26:27,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:26:27,928 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) [2021-07-13 19:26:28,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:28,205 INFO L93 Difference]: Finished difference Result 4946 states and 19222 transitions. [2021-07-13 19:26:28,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:26:28,205 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 [2021-07-13 19:26:28,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:28,221 INFO L225 Difference]: With dead ends: 4946 [2021-07-13 19:26:28,221 INFO L226 Difference]: Without dead ends: 4844 [2021-07-13 19:26:28,221 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 89.9ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:26:28,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4844 states. [2021-07-13 19:26:28,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4844 to 4195. [2021-07-13 19:26:28,297 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) [2021-07-13 19:26:28,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4195 states to 4195 states and 16636 transitions. [2021-07-13 19:26:28,312 INFO L78 Accepts]: Start accepts. Automaton has 4195 states and 16636 transitions. Word has length 25 [2021-07-13 19:26:28,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:28,312 INFO L482 AbstractCegarLoop]: Abstraction has 4195 states and 16636 transitions. [2021-07-13 19:26:28,312 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) [2021-07-13 19:26:28,313 INFO L276 IsEmpty]: Start isEmpty. Operand 4195 states and 16636 transitions. [2021-07-13 19:26:28,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:26:28,323 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:28,324 INFO L508 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] [2021-07-13 19:26:28,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:28,537 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:28,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:28,537 INFO L82 PathProgramCache]: Analyzing trace with hash -256616277, now seen corresponding path program 3 times [2021-07-13 19:26:28,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:28,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349927584] [2021-07-13 19:26:28,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:28,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:28,569 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:26:28,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:28,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349927584] [2021-07-13 19:26:28,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349927584] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:26:28,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:26:28,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 19:26:28,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637712819] [2021-07-13 19:26:28,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:26:28,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:28,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:26:28,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:26:28,570 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) [2021-07-13 19:26:28,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:28,711 INFO L93 Difference]: Finished difference Result 5169 states and 20167 transitions. [2021-07-13 19:26:28,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:26:28,711 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 [2021-07-13 19:26:28,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:28,726 INFO L225 Difference]: With dead ends: 5169 [2021-07-13 19:26:28,726 INFO L226 Difference]: Without dead ends: 5118 [2021-07-13 19:26:28,726 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.5ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:26:28,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5118 states. [2021-07-13 19:26:28,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5118 to 4611. [2021-07-13 19:26:28,823 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) [2021-07-13 19:26:28,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4611 states to 4611 states and 18316 transitions. [2021-07-13 19:26:28,839 INFO L78 Accepts]: Start accepts. Automaton has 4611 states and 18316 transitions. Word has length 25 [2021-07-13 19:26:28,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:28,840 INFO L482 AbstractCegarLoop]: Abstraction has 4611 states and 18316 transitions. [2021-07-13 19:26:28,840 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) [2021-07-13 19:26:28,840 INFO L276 IsEmpty]: Start isEmpty. Operand 4611 states and 18316 transitions. [2021-07-13 19:26:28,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 19:26:28,851 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:28,851 INFO L508 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] [2021-07-13 19:26:28,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-07-13 19:26:28,851 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:28,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:28,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1347954008, now seen corresponding path program 4 times [2021-07-13 19:26:28,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:28,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095147997] [2021-07-13 19:26:28,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:28,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:28,895 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:28,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:28,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095147997] [2021-07-13 19:26:28,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095147997] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:28,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274676420] [2021-07-13 19:26:28,895 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 [2021-07-13 19:26:28,923 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:26:28,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:28,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:26:28,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:29,006 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:29,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274676420] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:29,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:29,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-13 19:26:29,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445018267] [2021-07-13 19:26:29,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:26:29,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:29,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:26:29,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:26:29,008 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) [2021-07-13 19:26:29,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:29,824 INFO L93 Difference]: Finished difference Result 11402 states and 44327 transitions. [2021-07-13 19:26:29,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:26:29,824 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 [2021-07-13 19:26:29,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:29,857 INFO L225 Difference]: With dead ends: 11402 [2021-07-13 19:26:29,857 INFO L226 Difference]: Without dead ends: 11402 [2021-07-13 19:26:29,857 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 363.9ms TimeCoverageRelationStatistics Valid=267, Invalid=923, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:26:29,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11402 states. [2021-07-13 19:26:29,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11402 to 5821. [2021-07-13 19:26:30,004 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) [2021-07-13 19:26:30,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5821 states to 5821 states and 23374 transitions. [2021-07-13 19:26:30,022 INFO L78 Accepts]: Start accepts. Automaton has 5821 states and 23374 transitions. Word has length 28 [2021-07-13 19:26:30,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:30,023 INFO L482 AbstractCegarLoop]: Abstraction has 5821 states and 23374 transitions. [2021-07-13 19:26:30,023 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) [2021-07-13 19:26:30,023 INFO L276 IsEmpty]: Start isEmpty. Operand 5821 states and 23374 transitions. [2021-07-13 19:26:30,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 19:26:30,035 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:30,035 INFO L508 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] [2021-07-13 19:26:30,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-07-13 19:26:30,249 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:30,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:30,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1763427731, now seen corresponding path program 5 times [2021-07-13 19:26:30,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:30,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155852541] [2021-07-13 19:26:30,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:30,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:30,277 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:30,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:30,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155852541] [2021-07-13 19:26:30,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155852541] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:30,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212917431] [2021-07-13 19:26:30,277 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 [2021-07-13 19:26:30,305 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:26:30,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:30,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:26:30,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:30,374 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:30,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212917431] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:30,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:30,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-13 19:26:30,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844168539] [2021-07-13 19:26:30,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:26:30,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:30,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:26:30,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:26:30,376 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) [2021-07-13 19:26:31,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:31,029 INFO L93 Difference]: Finished difference Result 15383 states and 58771 transitions. [2021-07-13 19:26:31,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:26:31,029 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 [2021-07-13 19:26:31,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:31,071 INFO L225 Difference]: With dead ends: 15383 [2021-07-13 19:26:31,071 INFO L226 Difference]: Without dead ends: 15203 [2021-07-13 19:26:31,072 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 277.8ms TimeCoverageRelationStatistics Valid=229, Invalid=827, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:26:31,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15203 states. [2021-07-13 19:26:31,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15203 to 8319. [2021-07-13 19:26:31,359 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) [2021-07-13 19:26:31,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8319 states to 8319 states and 34255 transitions. [2021-07-13 19:26:31,386 INFO L78 Accepts]: Start accepts. Automaton has 8319 states and 34255 transitions. Word has length 28 [2021-07-13 19:26:31,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:31,386 INFO L482 AbstractCegarLoop]: Abstraction has 8319 states and 34255 transitions. [2021-07-13 19:26:31,386 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) [2021-07-13 19:26:31,387 INFO L276 IsEmpty]: Start isEmpty. Operand 8319 states and 34255 transitions. [2021-07-13 19:26:31,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 19:26:31,405 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:31,405 INFO L508 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] [2021-07-13 19:26:31,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-07-13 19:26:31,621 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:31,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:31,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1546556397, now seen corresponding path program 6 times [2021-07-13 19:26:31,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:31,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133365779] [2021-07-13 19:26:31,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:31,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:31,643 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:31,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:31,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133365779] [2021-07-13 19:26:31,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133365779] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:31,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642924247] [2021-07-13 19:26:31,643 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 [2021-07-13 19:26:31,674 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:26:31,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:31,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:26:31,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:31,753 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:31,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642924247] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:31,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:31,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-07-13 19:26:31,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846803387] [2021-07-13 19:26:31,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:26:31,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:31,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:26:31,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:26:31,755 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) [2021-07-13 19:26:32,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:32,136 INFO L93 Difference]: Finished difference Result 16184 states and 62633 transitions. [2021-07-13 19:26:32,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:26:32,137 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 [2021-07-13 19:26:32,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:32,182 INFO L225 Difference]: With dead ends: 16184 [2021-07-13 19:26:32,182 INFO L226 Difference]: Without dead ends: 16184 [2021-07-13 19:26:32,183 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 126.8ms TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:26:32,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16184 states. [2021-07-13 19:26:32,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16184 to 8319. [2021-07-13 19:26:32,549 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) [2021-07-13 19:26:32,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8319 states to 8319 states and 34096 transitions. [2021-07-13 19:26:32,578 INFO L78 Accepts]: Start accepts. Automaton has 8319 states and 34096 transitions. Word has length 28 [2021-07-13 19:26:32,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:32,579 INFO L482 AbstractCegarLoop]: Abstraction has 8319 states and 34096 transitions. [2021-07-13 19:26:32,579 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) [2021-07-13 19:26:32,579 INFO L276 IsEmpty]: Start isEmpty. Operand 8319 states and 34096 transitions. [2021-07-13 19:26:32,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 19:26:32,597 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:32,598 INFO L508 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] [2021-07-13 19:26:32,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-07-13 19:26:32,800 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:32,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:32,800 INFO L82 PathProgramCache]: Analyzing trace with hash 2142952270, now seen corresponding path program 7 times [2021-07-13 19:26:32,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:32,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415329390] [2021-07-13 19:26:32,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:32,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:32,822 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:32,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:32,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415329390] [2021-07-13 19:26:32,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415329390] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:32,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78880334] [2021-07-13 19:26:32,823 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 [2021-07-13 19:26:32,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:32,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:26:32,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:32,929 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:32,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78880334] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:32,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:32,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-07-13 19:26:32,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597033032] [2021-07-13 19:26:32,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:26:32,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:32,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:26:32,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:26:32,930 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) [2021-07-13 19:26:33,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:33,355 INFO L93 Difference]: Finished difference Result 10083 states and 39959 transitions. [2021-07-13 19:26:33,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:26:33,356 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 [2021-07-13 19:26:33,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:33,385 INFO L225 Difference]: With dead ends: 10083 [2021-07-13 19:26:33,386 INFO L226 Difference]: Without dead ends: 10027 [2021-07-13 19:26:33,386 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 162.2ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:26:33,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10027 states. [2021-07-13 19:26:33,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10027 to 8326. [2021-07-13 19:26:33,558 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) [2021-07-13 19:26:33,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8326 states to 8326 states and 34099 transitions. [2021-07-13 19:26:33,585 INFO L78 Accepts]: Start accepts. Automaton has 8326 states and 34099 transitions. Word has length 28 [2021-07-13 19:26:33,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:33,585 INFO L482 AbstractCegarLoop]: Abstraction has 8326 states and 34099 transitions. [2021-07-13 19:26:33,585 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) [2021-07-13 19:26:33,585 INFO L276 IsEmpty]: Start isEmpty. Operand 8326 states and 34099 transitions. [2021-07-13 19:26:33,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 19:26:33,602 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:33,603 INFO L508 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] [2021-07-13 19:26:33,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:33,803 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:33,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:33,804 INFO L82 PathProgramCache]: Analyzing trace with hash -270034728, now seen corresponding path program 8 times [2021-07-13 19:26:33,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:33,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978971317] [2021-07-13 19:26:33,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:33,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:33,893 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:26:33,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:33,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978971317] [2021-07-13 19:26:33,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978971317] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:33,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974401652] [2021-07-13 19:26:33,893 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 [2021-07-13 19:26:33,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:26:33,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:33,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:26:33,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:34,032 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:34,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974401652] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:34,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:34,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 9 [2021-07-13 19:26:34,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133226079] [2021-07-13 19:26:34,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:26:34,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:34,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:26:34,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:26:34,034 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) [2021-07-13 19:26:34,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:34,567 INFO L93 Difference]: Finished difference Result 17529 states and 67736 transitions. [2021-07-13 19:26:34,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:26:34,568 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 [2021-07-13 19:26:34,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:34,668 INFO L225 Difference]: With dead ends: 17529 [2021-07-13 19:26:34,668 INFO L226 Difference]: Without dead ends: 17529 [2021-07-13 19:26:34,669 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 209.9ms TimeCoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:26:34,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17529 states. [2021-07-13 19:26:34,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17529 to 8432. [2021-07-13 19:26:34,884 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) [2021-07-13 19:26:34,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8432 states to 8432 states and 34460 transitions. [2021-07-13 19:26:34,965 INFO L78 Accepts]: Start accepts. Automaton has 8432 states and 34460 transitions. Word has length 28 [2021-07-13 19:26:34,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:34,965 INFO L482 AbstractCegarLoop]: Abstraction has 8432 states and 34460 transitions. [2021-07-13 19:26:34,965 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) [2021-07-13 19:26:34,966 INFO L276 IsEmpty]: Start isEmpty. Operand 8432 states and 34460 transitions. [2021-07-13 19:26:34,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 19:26:34,982 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:34,982 INFO L508 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] [2021-07-13 19:26:35,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:35,183 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:35,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:35,184 INFO L82 PathProgramCache]: Analyzing trace with hash -2015724689, now seen corresponding path program 9 times [2021-07-13 19:26:35,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:35,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801486937] [2021-07-13 19:26:35,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:35,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:35,205 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:26:35,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:35,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801486937] [2021-07-13 19:26:35,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801486937] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:35,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089954886] [2021-07-13 19:26:35,205 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 [2021-07-13 19:26:35,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:26:35,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:35,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:26:35,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:35,328 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:35,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089954886] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:35,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:35,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 9 [2021-07-13 19:26:35,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861515011] [2021-07-13 19:26:35,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:26:35,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:35,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:26:35,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:26:35,329 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) [2021-07-13 19:26:35,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:35,782 INFO L93 Difference]: Finished difference Result 15647 states and 60285 transitions. [2021-07-13 19:26:35,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:26:35,782 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 [2021-07-13 19:26:35,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:35,894 INFO L225 Difference]: With dead ends: 15647 [2021-07-13 19:26:35,894 INFO L226 Difference]: Without dead ends: 15587 [2021-07-13 19:26:35,895 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 145.1ms TimeCoverageRelationStatistics Valid=144, Invalid=456, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:26:35,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15587 states. [2021-07-13 19:26:36,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15587 to 8432. [2021-07-13 19:26:36,132 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) [2021-07-13 19:26:36,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8432 states to 8432 states and 34440 transitions. [2021-07-13 19:26:36,236 INFO L78 Accepts]: Start accepts. Automaton has 8432 states and 34440 transitions. Word has length 28 [2021-07-13 19:26:36,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:36,236 INFO L482 AbstractCegarLoop]: Abstraction has 8432 states and 34440 transitions. [2021-07-13 19:26:36,236 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) [2021-07-13 19:26:36,236 INFO L276 IsEmpty]: Start isEmpty. Operand 8432 states and 34440 transitions. [2021-07-13 19:26:36,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 19:26:36,254 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:36,254 INFO L508 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] [2021-07-13 19:26:36,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:36,461 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:36,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:36,461 INFO L82 PathProgramCache]: Analyzing trace with hash 946388915, now seen corresponding path program 10 times [2021-07-13 19:26:36,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:36,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289980388] [2021-07-13 19:26:36,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:36,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:36,483 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:36,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:36,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289980388] [2021-07-13 19:26:36,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289980388] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:36,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140742518] [2021-07-13 19:26:36,483 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 [2021-07-13 19:26:36,507 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:26:36,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:36,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:26:36,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:36,598 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:36,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140742518] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:36,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:36,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 9 [2021-07-13 19:26:36,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683875319] [2021-07-13 19:26:36,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:26:36,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:36,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:26:36,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:26:36,599 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) [2021-07-13 19:26:37,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:37,203 INFO L93 Difference]: Finished difference Result 18798 states and 72632 transitions. [2021-07-13 19:26:37,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:26:37,204 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 [2021-07-13 19:26:37,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:37,261 INFO L225 Difference]: With dead ends: 18798 [2021-07-13 19:26:37,261 INFO L226 Difference]: Without dead ends: 18798 [2021-07-13 19:26:37,262 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 176.3ms TimeCoverageRelationStatistics Valid=184, Invalid=572, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:26:37,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18798 states. [2021-07-13 19:26:37,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18798 to 8538. [2021-07-13 19:26:37,507 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) [2021-07-13 19:26:37,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8538 states to 8538 states and 34854 transitions. [2021-07-13 19:26:37,540 INFO L78 Accepts]: Start accepts. Automaton has 8538 states and 34854 transitions. Word has length 28 [2021-07-13 19:26:37,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:37,541 INFO L482 AbstractCegarLoop]: Abstraction has 8538 states and 34854 transitions. [2021-07-13 19:26:37,541 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) [2021-07-13 19:26:37,541 INFO L276 IsEmpty]: Start isEmpty. Operand 8538 states and 34854 transitions. [2021-07-13 19:26:37,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 19:26:37,559 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:37,559 INFO L508 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] [2021-07-13 19:26:37,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-07-13 19:26:37,760 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:37,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:37,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1542784788, now seen corresponding path program 11 times [2021-07-13 19:26:37,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:37,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614306867] [2021-07-13 19:26:37,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:37,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:37,788 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:37,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:37,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614306867] [2021-07-13 19:26:37,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614306867] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:37,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021128379] [2021-07-13 19:26:37,788 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 [2021-07-13 19:26:37,816 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:26:37,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:37,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:26:37,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:37,949 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:37,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021128379] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:37,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:37,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 9 [2021-07-13 19:26:37,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45914028] [2021-07-13 19:26:37,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:26:37,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:37,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:26:37,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:26:37,950 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) [2021-07-13 19:26:38,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:38,443 INFO L93 Difference]: Finished difference Result 14070 states and 54143 transitions. [2021-07-13 19:26:38,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:26:38,444 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 [2021-07-13 19:26:38,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:38,486 INFO L225 Difference]: With dead ends: 14070 [2021-07-13 19:26:38,486 INFO L226 Difference]: Without dead ends: 14014 [2021-07-13 19:26:38,487 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 134.9ms TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:26:38,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14014 states. [2021-07-13 19:26:38,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14014 to 8538. [2021-07-13 19:26:38,692 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) [2021-07-13 19:26:38,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8538 states to 8538 states and 34834 transitions. [2021-07-13 19:26:38,821 INFO L78 Accepts]: Start accepts. Automaton has 8538 states and 34834 transitions. Word has length 28 [2021-07-13 19:26:38,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:38,821 INFO L482 AbstractCegarLoop]: Abstraction has 8538 states and 34834 transitions. [2021-07-13 19:26:38,822 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) [2021-07-13 19:26:38,822 INFO L276 IsEmpty]: Start isEmpty. Operand 8538 states and 34834 transitions. [2021-07-13 19:26:38,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 19:26:38,840 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:38,840 INFO L508 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] [2021-07-13 19:26:39,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:39,061 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:39,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:39,061 INFO L82 PathProgramCache]: Analyzing trace with hash 477986465, now seen corresponding path program 12 times [2021-07-13 19:26:39,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:39,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246484635] [2021-07-13 19:26:39,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:39,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:39,087 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:39,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:39,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246484635] [2021-07-13 19:26:39,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246484635] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:39,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518349914] [2021-07-13 19:26:39,087 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 [2021-07-13 19:26:39,113 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:26:39,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:39,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:26:39,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:39,220 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:39,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518349914] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:39,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:39,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-13 19:26:39,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789631685] [2021-07-13 19:26:39,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:26:39,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:39,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:26:39,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:26:39,221 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) [2021-07-13 19:26:40,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:40,085 INFO L93 Difference]: Finished difference Result 18926 states and 73169 transitions. [2021-07-13 19:26:40,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:26:40,086 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 [2021-07-13 19:26:40,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:40,152 INFO L225 Difference]: With dead ends: 18926 [2021-07-13 19:26:40,152 INFO L226 Difference]: Without dead ends: 18926 [2021-07-13 19:26:40,153 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 262.1ms TimeCoverageRelationStatistics Valid=215, Invalid=777, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:26:40,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18926 states. [2021-07-13 19:26:40,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18926 to 8689. [2021-07-13 19:26:40,459 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) [2021-07-13 19:26:40,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8689 states to 8689 states and 35261 transitions. [2021-07-13 19:26:40,492 INFO L78 Accepts]: Start accepts. Automaton has 8689 states and 35261 transitions. Word has length 28 [2021-07-13 19:26:40,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:40,492 INFO L482 AbstractCegarLoop]: Abstraction has 8689 states and 35261 transitions. [2021-07-13 19:26:40,492 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) [2021-07-13 19:26:40,492 INFO L276 IsEmpty]: Start isEmpty. Operand 8689 states and 35261 transitions. [2021-07-13 19:26:40,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 19:26:40,511 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:40,511 INFO L508 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] [2021-07-13 19:26:40,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-07-13 19:26:40,728 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:40,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:40,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1479976792, now seen corresponding path program 13 times [2021-07-13 19:26:40,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:40,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959670439] [2021-07-13 19:26:40,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:40,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:40,759 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:40,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:40,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959670439] [2021-07-13 19:26:40,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959670439] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:40,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531756840] [2021-07-13 19:26:40,760 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 [2021-07-13 19:26:40,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:40,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:26:40,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:40,876 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:40,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531756840] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:40,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:40,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-13 19:26:40,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192413513] [2021-07-13 19:26:40,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:26:40,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:40,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:26:40,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:26:40,878 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) [2021-07-13 19:26:41,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:41,405 INFO L93 Difference]: Finished difference Result 12612 states and 48542 transitions. [2021-07-13 19:26:41,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:26:41,406 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 [2021-07-13 19:26:41,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:41,447 INFO L225 Difference]: With dead ends: 12612 [2021-07-13 19:26:41,447 INFO L226 Difference]: Without dead ends: 12556 [2021-07-13 19:26:41,447 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 157.6ms TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:26:41,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12556 states. [2021-07-13 19:26:41,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12556 to 8811. [2021-07-13 19:26:41,704 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) [2021-07-13 19:26:41,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8811 states to 8811 states and 35684 transitions. [2021-07-13 19:26:41,730 INFO L78 Accepts]: Start accepts. Automaton has 8811 states and 35684 transitions. Word has length 28 [2021-07-13 19:26:41,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:41,730 INFO L482 AbstractCegarLoop]: Abstraction has 8811 states and 35684 transitions. [2021-07-13 19:26:41,730 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) [2021-07-13 19:26:41,730 INFO L276 IsEmpty]: Start isEmpty. Operand 8811 states and 35684 transitions. [2021-07-13 19:26:41,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 19:26:41,747 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:41,747 INFO L508 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] [2021-07-13 19:26:41,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:41,948 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:41,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:41,948 INFO L82 PathProgramCache]: Analyzing trace with hash -549507314, now seen corresponding path program 14 times [2021-07-13 19:26:41,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:41,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956514344] [2021-07-13 19:26:41,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:41,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:41,968 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:26:41,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:41,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956514344] [2021-07-13 19:26:41,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956514344] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:41,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064966513] [2021-07-13 19:26:41,968 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 [2021-07-13 19:26:41,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:26:41,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:41,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:26:41,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:42,074 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:42,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064966513] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:42,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:42,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-07-13 19:26:42,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218385294] [2021-07-13 19:26:42,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:26:42,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:42,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:26:42,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:26:42,076 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) [2021-07-13 19:26:42,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:42,461 INFO L93 Difference]: Finished difference Result 16530 states and 63291 transitions. [2021-07-13 19:26:42,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:26:42,462 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 [2021-07-13 19:26:42,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:42,516 INFO L225 Difference]: With dead ends: 16530 [2021-07-13 19:26:42,516 INFO L226 Difference]: Without dead ends: 16530 [2021-07-13 19:26:42,516 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 117.0ms TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:26:42,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16530 states. [2021-07-13 19:26:42,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16530 to 8811. [2021-07-13 19:26:42,767 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) [2021-07-13 19:26:42,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8811 states to 8811 states and 35631 transitions. [2021-07-13 19:26:42,794 INFO L78 Accepts]: Start accepts. Automaton has 8811 states and 35631 transitions. Word has length 28 [2021-07-13 19:26:42,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:42,794 INFO L482 AbstractCegarLoop]: Abstraction has 8811 states and 35631 transitions. [2021-07-13 19:26:42,794 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) [2021-07-13 19:26:42,794 INFO L276 IsEmpty]: Start isEmpty. Operand 8811 states and 35631 transitions. [2021-07-13 19:26:42,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 19:26:42,811 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:42,811 INFO L508 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] [2021-07-13 19:26:43,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-07-13 19:26:43,012 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:43,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:43,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1999770021, now seen corresponding path program 15 times [2021-07-13 19:26:43,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:43,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523680664] [2021-07-13 19:26:43,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:43,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:43,032 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:26:43,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:43,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523680664] [2021-07-13 19:26:43,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523680664] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:43,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887268461] [2021-07-13 19:26:43,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:26:43,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:26:43,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:43,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:26:43,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:43,136 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:43,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887268461] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:43,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:43,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-07-13 19:26:43,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265069249] [2021-07-13 19:26:43,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:26:43,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:43,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:26:43,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:26:43,137 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) [2021-07-13 19:26:43,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:43,493 INFO L93 Difference]: Finished difference Result 11652 states and 45517 transitions. [2021-07-13 19:26:43,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:26:43,493 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 [2021-07-13 19:26:43,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:43,528 INFO L225 Difference]: With dead ends: 11652 [2021-07-13 19:26:43,528 INFO L226 Difference]: Without dead ends: 11632 [2021-07-13 19:26:43,529 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 90.5ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:26:43,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11632 states. [2021-07-13 19:26:43,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11632 to 8811. [2021-07-13 19:26:43,727 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) [2021-07-13 19:26:43,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8811 states to 8811 states and 35621 transitions. [2021-07-13 19:26:43,757 INFO L78 Accepts]: Start accepts. Automaton has 8811 states and 35621 transitions. Word has length 28 [2021-07-13 19:26:43,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:43,758 INFO L482 AbstractCegarLoop]: Abstraction has 8811 states and 35621 transitions. [2021-07-13 19:26:43,758 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) [2021-07-13 19:26:43,758 INFO L276 IsEmpty]: Start isEmpty. Operand 8811 states and 35621 transitions. [2021-07-13 19:26:43,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 19:26:43,775 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:43,775 INFO L508 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] [2021-07-13 19:26:43,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-07-13 19:26:43,976 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:43,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:43,977 INFO L82 PathProgramCache]: Analyzing trace with hash 666916329, now seen corresponding path program 16 times [2021-07-13 19:26:43,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:43,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565819256] [2021-07-13 19:26:43,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:43,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:43,999 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:26:43,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:43,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565819256] [2021-07-13 19:26:43,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565819256] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:43,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635922612] [2021-07-13 19:26:43,999 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 [2021-07-13 19:26:44,025 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:26:44,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:44,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:26:44,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:44,125 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:44,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635922612] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:44,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:44,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-07-13 19:26:44,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362817260] [2021-07-13 19:26:44,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:26:44,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:44,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:26:44,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:26:44,127 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) [2021-07-13 19:26:44,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:44,566 INFO L93 Difference]: Finished difference Result 13573 states and 53112 transitions. [2021-07-13 19:26:44,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:26:44,567 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 [2021-07-13 19:26:44,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:44,611 INFO L225 Difference]: With dead ends: 13573 [2021-07-13 19:26:44,612 INFO L226 Difference]: Without dead ends: 13573 [2021-07-13 19:26:44,612 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 129.9ms TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:26:44,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13573 states. [2021-07-13 19:26:44,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13573 to 8864. [2021-07-13 19:26:44,799 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) [2021-07-13 19:26:44,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8864 states to 8864 states and 35828 transitions. [2021-07-13 19:26:44,826 INFO L78 Accepts]: Start accepts. Automaton has 8864 states and 35828 transitions. Word has length 28 [2021-07-13 19:26:44,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:44,826 INFO L482 AbstractCegarLoop]: Abstraction has 8864 states and 35828 transitions. [2021-07-13 19:26:44,826 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) [2021-07-13 19:26:44,826 INFO L276 IsEmpty]: Start isEmpty. Operand 8864 states and 35828 transitions. [2021-07-13 19:26:44,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 19:26:44,842 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:44,842 INFO L508 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] [2021-07-13 19:26:45,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-07-13 19:26:45,043 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:45,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:45,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1263312202, now seen corresponding path program 17 times [2021-07-13 19:26:45,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:45,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654896072] [2021-07-13 19:26:45,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:45,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:45,079 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:26:45,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:45,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654896072] [2021-07-13 19:26:45,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654896072] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:45,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240079504] [2021-07-13 19:26:45,079 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 [2021-07-13 19:26:45,106 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:26:45,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:45,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:26:45,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:45,178 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:45,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240079504] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:45,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:45,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-07-13 19:26:45,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847867211] [2021-07-13 19:26:45,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:26:45,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:45,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:26:45,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:26:45,179 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) [2021-07-13 19:26:45,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:45,646 INFO L93 Difference]: Finished difference Result 14465 states and 55050 transitions. [2021-07-13 19:26:45,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:26:45,647 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 [2021-07-13 19:26:45,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:45,703 INFO L225 Difference]: With dead ends: 14465 [2021-07-13 19:26:45,703 INFO L226 Difference]: Without dead ends: 14437 [2021-07-13 19:26:45,705 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 132.4ms TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:26:45,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14437 states. [2021-07-13 19:26:45,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14437 to 8864. [2021-07-13 19:26:45,986 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) [2021-07-13 19:26:46,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8864 states to 8864 states and 35818 transitions. [2021-07-13 19:26:46,017 INFO L78 Accepts]: Start accepts. Automaton has 8864 states and 35818 transitions. Word has length 28 [2021-07-13 19:26:46,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:46,017 INFO L482 AbstractCegarLoop]: Abstraction has 8864 states and 35818 transitions. [2021-07-13 19:26:46,017 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) [2021-07-13 19:26:46,017 INFO L276 IsEmpty]: Start isEmpty. Operand 8864 states and 35818 transitions. [2021-07-13 19:26:46,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 19:26:46,035 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:46,035 INFO L508 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] [2021-07-13 19:26:46,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-07-13 19:26:46,236 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:46,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:46,236 INFO L82 PathProgramCache]: Analyzing trace with hash 198513879, now seen corresponding path program 18 times [2021-07-13 19:26:46,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:46,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631902750] [2021-07-13 19:26:46,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:46,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:46,273 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:46,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:46,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631902750] [2021-07-13 19:26:46,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631902750] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:46,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611110205] [2021-07-13 19:26:46,273 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 [2021-07-13 19:26:46,301 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:26:46,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:46,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:26:46,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:46,379 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:46,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611110205] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:46,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:46,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-07-13 19:26:46,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327988625] [2021-07-13 19:26:46,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:26:46,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:46,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:26:46,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:26:46,380 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) [2021-07-13 19:26:47,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:47,133 INFO L93 Difference]: Finished difference Result 17059 states and 67264 transitions. [2021-07-13 19:26:47,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:26:47,133 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 [2021-07-13 19:26:47,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:47,190 INFO L225 Difference]: With dead ends: 17059 [2021-07-13 19:26:47,190 INFO L226 Difference]: Without dead ends: 17059 [2021-07-13 19:26:47,191 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 209.3ms TimeCoverageRelationStatistics Valid=185, Invalid=745, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:26:47,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17059 states. [2021-07-13 19:26:47,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17059 to 8917. [2021-07-13 19:26:47,521 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) [2021-07-13 19:26:47,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8917 states to 8917 states and 36025 transitions. [2021-07-13 19:26:47,549 INFO L78 Accepts]: Start accepts. Automaton has 8917 states and 36025 transitions. Word has length 28 [2021-07-13 19:26:47,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:47,549 INFO L482 AbstractCegarLoop]: Abstraction has 8917 states and 36025 transitions. [2021-07-13 19:26:47,549 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) [2021-07-13 19:26:47,549 INFO L276 IsEmpty]: Start isEmpty. Operand 8917 states and 36025 transitions. [2021-07-13 19:26:47,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 19:26:47,566 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:47,566 INFO L508 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] [2021-07-13 19:26:47,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:47,767 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:47,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:47,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1200504206, now seen corresponding path program 19 times [2021-07-13 19:26:47,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:47,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133056946] [2021-07-13 19:26:47,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:47,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:47,804 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:47,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:47,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133056946] [2021-07-13 19:26:47,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133056946] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:47,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47457565] [2021-07-13 19:26:47,804 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 [2021-07-13 19:26:47,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:47,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:26:47,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:47,898 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:47,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47457565] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:47,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:47,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-07-13 19:26:47,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821861138] [2021-07-13 19:26:47,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:26:47,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:47,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:26:47,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:26:47,899 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) [2021-07-13 19:26:48,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:48,448 INFO L93 Difference]: Finished difference Result 17336 states and 65142 transitions. [2021-07-13 19:26:48,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:26:48,448 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 [2021-07-13 19:26:48,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:48,505 INFO L225 Difference]: With dead ends: 17336 [2021-07-13 19:26:48,505 INFO L226 Difference]: Without dead ends: 17224 [2021-07-13 19:26:48,506 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 227.1ms TimeCoverageRelationStatistics Valid=211, Invalid=781, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:26:48,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17224 states. [2021-07-13 19:26:48,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17224 to 8917. [2021-07-13 19:26:48,755 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) [2021-07-13 19:26:48,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8917 states to 8917 states and 36015 transitions. [2021-07-13 19:26:48,783 INFO L78 Accepts]: Start accepts. Automaton has 8917 states and 36015 transitions. Word has length 28 [2021-07-13 19:26:48,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:48,783 INFO L482 AbstractCegarLoop]: Abstraction has 8917 states and 36015 transitions. [2021-07-13 19:26:48,783 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) [2021-07-13 19:26:48,783 INFO L276 IsEmpty]: Start isEmpty. Operand 8917 states and 36015 transitions. [2021-07-13 19:26:48,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 19:26:48,800 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:48,800 INFO L508 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] [2021-07-13 19:26:49,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:49,005 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:49,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:49,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1319877997, now seen corresponding path program 20 times [2021-07-13 19:26:49,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:49,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964992227] [2021-07-13 19:26:49,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:49,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:49,039 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:49,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:49,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964992227] [2021-07-13 19:26:49,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964992227] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:49,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319256059] [2021-07-13 19:26:49,039 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 [2021-07-13 19:26:49,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:26:49,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:49,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:26:49,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:49,128 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:49,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319256059] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:49,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:49,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-13 19:26:49,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490307251] [2021-07-13 19:26:49,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:26:49,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:49,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:26:49,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:26:49,129 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) [2021-07-13 19:26:49,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:49,922 INFO L93 Difference]: Finished difference Result 13676 states and 54158 transitions. [2021-07-13 19:26:49,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:26:49,922 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 [2021-07-13 19:26:49,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:49,960 INFO L225 Difference]: With dead ends: 13676 [2021-07-13 19:26:49,961 INFO L226 Difference]: Without dead ends: 13676 [2021-07-13 19:26:49,961 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 300.5ms TimeCoverageRelationStatistics Valid=267, Invalid=923, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:26:49,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13676 states. [2021-07-13 19:26:50,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13676 to 9131. [2021-07-13 19:26:50,145 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) [2021-07-13 19:26:50,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9131 states to 9131 states and 36726 transitions. [2021-07-13 19:26:50,172 INFO L78 Accepts]: Start accepts. Automaton has 9131 states and 36726 transitions. Word has length 28 [2021-07-13 19:26:50,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:50,172 INFO L482 AbstractCegarLoop]: Abstraction has 9131 states and 36726 transitions. [2021-07-13 19:26:50,172 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) [2021-07-13 19:26:50,172 INFO L276 IsEmpty]: Start isEmpty. Operand 9131 states and 36726 transitions. [2021-07-13 19:26:50,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 19:26:50,189 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:50,189 INFO L508 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] [2021-07-13 19:26:50,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-07-13 19:26:50,390 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:50,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:50,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1439601334, now seen corresponding path program 21 times [2021-07-13 19:26:50,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:50,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172366204] [2021-07-13 19:26:50,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:50,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:50,442 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:50,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:50,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172366204] [2021-07-13 19:26:50,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172366204] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:50,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133845761] [2021-07-13 19:26:50,443 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 [2021-07-13 19:26:50,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:26:50,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:50,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:26:50,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:50,531 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:50,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133845761] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:50,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:50,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-13 19:26:50,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583823912] [2021-07-13 19:26:50,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:26:50,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:50,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:26:50,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:26:50,532 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) [2021-07-13 19:26:51,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:51,112 INFO L93 Difference]: Finished difference Result 15155 states and 56901 transitions. [2021-07-13 19:26:51,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:26:51,113 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 [2021-07-13 19:26:51,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:51,163 INFO L225 Difference]: With dead ends: 15155 [2021-07-13 19:26:51,163 INFO L226 Difference]: Without dead ends: 15043 [2021-07-13 19:26:51,164 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 237.5ms TimeCoverageRelationStatistics Valid=198, Invalid=732, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:26:51,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15043 states. [2021-07-13 19:26:51,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15043 to 9347. [2021-07-13 19:26:51,425 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) [2021-07-13 19:26:51,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9347 states to 9347 states and 37461 transitions. [2021-07-13 19:26:51,459 INFO L78 Accepts]: Start accepts. Automaton has 9347 states and 37461 transitions. Word has length 28 [2021-07-13 19:26:51,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:51,459 INFO L482 AbstractCegarLoop]: Abstraction has 9347 states and 37461 transitions. [2021-07-13 19:26:51,459 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) [2021-07-13 19:26:51,459 INFO L276 IsEmpty]: Start isEmpty. Operand 9347 states and 37461 transitions. [2021-07-13 19:26:51,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 19:26:51,481 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:51,481 INFO L508 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] [2021-07-13 19:26:51,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:51,681 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:51,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:51,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1045336016, now seen corresponding path program 22 times [2021-07-13 19:26:51,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:51,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387666717] [2021-07-13 19:26:51,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:51,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:51,708 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:51,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:51,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387666717] [2021-07-13 19:26:51,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387666717] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:51,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634789093] [2021-07-13 19:26:51,709 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 [2021-07-13 19:26:51,757 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:26:51,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:51,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:26:51,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:51,835 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:51,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634789093] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:51,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:51,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-13 19:26:51,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117176233] [2021-07-13 19:26:51,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:26:51,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:51,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:26:51,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:26:51,838 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) [2021-07-13 19:26:52,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:52,552 INFO L93 Difference]: Finished difference Result 16354 states and 63144 transitions. [2021-07-13 19:26:52,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:26:52,553 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 [2021-07-13 19:26:52,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:52,606 INFO L225 Difference]: With dead ends: 16354 [2021-07-13 19:26:52,606 INFO L226 Difference]: Without dead ends: 16354 [2021-07-13 19:26:52,606 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 234.7ms TimeCoverageRelationStatistics Valid=215, Invalid=777, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:26:52,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16354 states. [2021-07-13 19:26:52,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16354 to 9241. [2021-07-13 19:26:52,863 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) [2021-07-13 19:26:52,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9241 states to 9241 states and 36941 transitions. [2021-07-13 19:26:52,894 INFO L78 Accepts]: Start accepts. Automaton has 9241 states and 36941 transitions. Word has length 28 [2021-07-13 19:26:52,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:52,895 INFO L482 AbstractCegarLoop]: Abstraction has 9241 states and 36941 transitions. [2021-07-13 19:26:52,895 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) [2021-07-13 19:26:52,895 INFO L276 IsEmpty]: Start isEmpty. Operand 9241 states and 36941 transitions. [2021-07-13 19:26:52,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 19:26:52,914 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:52,914 INFO L508 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] [2021-07-13 19:26:53,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-07-13 19:26:53,115 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:53,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:53,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1291785701, now seen corresponding path program 23 times [2021-07-13 19:26:53,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:53,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852356724] [2021-07-13 19:26:53,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:53,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:53,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:53,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:53,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852356724] [2021-07-13 19:26:53,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852356724] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:53,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778552679] [2021-07-13 19:26:53,140 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 [2021-07-13 19:26:53,168 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:26:53,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:53,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:26:53,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:53,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:53,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778552679] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:53,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:53,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-13 19:26:53,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524241747] [2021-07-13 19:26:53,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:26:53,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:53,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:26:53,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:26:53,258 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) [2021-07-13 19:26:53,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:53,754 INFO L93 Difference]: Finished difference Result 12762 states and 48779 transitions. [2021-07-13 19:26:53,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:26:53,754 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 [2021-07-13 19:26:53,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:53,792 INFO L225 Difference]: With dead ends: 12762 [2021-07-13 19:26:53,792 INFO L226 Difference]: Without dead ends: 12722 [2021-07-13 19:26:53,792 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 198.7ms TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:26:53,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12722 states. [2021-07-13 19:26:53,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12722 to 8983. [2021-07-13 19:26:53,997 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) [2021-07-13 19:26:54,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8983 states to 8983 states and 35960 transitions. [2021-07-13 19:26:54,028 INFO L78 Accepts]: Start accepts. Automaton has 8983 states and 35960 transitions. Word has length 28 [2021-07-13 19:26:54,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:54,028 INFO L482 AbstractCegarLoop]: Abstraction has 8983 states and 35960 transitions. [2021-07-13 19:26:54,028 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) [2021-07-13 19:26:54,028 INFO L276 IsEmpty]: Start isEmpty. Operand 8983 states and 35960 transitions. [2021-07-13 19:26:54,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 19:26:54,046 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:54,046 INFO L508 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] [2021-07-13 19:26:54,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-07-13 19:26:54,246 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:54,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:54,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1628155237, now seen corresponding path program 4 times [2021-07-13 19:26:54,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:54,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690226462] [2021-07-13 19:26:54,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:54,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:54,278 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:54,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:54,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690226462] [2021-07-13 19:26:54,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690226462] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:54,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534665742] [2021-07-13 19:26:54,279 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 [2021-07-13 19:26:54,305 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:26:54,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:54,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:26:54,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:54,378 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:54,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534665742] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:54,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:54,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-13 19:26:54,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843373531] [2021-07-13 19:26:54,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:26:54,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:54,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:26:54,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:26:54,379 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) [2021-07-13 19:26:55,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:55,168 INFO L93 Difference]: Finished difference Result 30234 states and 120265 transitions. [2021-07-13 19:26:55,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:26:55,169 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 [2021-07-13 19:26:55,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:55,268 INFO L225 Difference]: With dead ends: 30234 [2021-07-13 19:26:55,268 INFO L226 Difference]: Without dead ends: 30234 [2021-07-13 19:26:55,268 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 279.0ms TimeCoverageRelationStatistics Valid=267, Invalid=923, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:26:55,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30234 states. [2021-07-13 19:26:55,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30234 to 14412. [2021-07-13 19:26:55,699 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) [2021-07-13 19:26:55,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14412 states to 14412 states and 59081 transitions. [2021-07-13 19:26:55,747 INFO L78 Accepts]: Start accepts. Automaton has 14412 states and 59081 transitions. Word has length 28 [2021-07-13 19:26:55,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:55,747 INFO L482 AbstractCegarLoop]: Abstraction has 14412 states and 59081 transitions. [2021-07-13 19:26:55,747 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) [2021-07-13 19:26:55,747 INFO L276 IsEmpty]: Start isEmpty. Operand 14412 states and 59081 transitions. [2021-07-13 19:26:55,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 19:26:55,776 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:55,776 INFO L508 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] [2021-07-13 19:26:55,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-07-13 19:26:55,977 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:55,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:55,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1254864512, now seen corresponding path program 5 times [2021-07-13 19:26:55,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:55,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814389242] [2021-07-13 19:26:55,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:55,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:56,005 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:56,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:56,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814389242] [2021-07-13 19:26:56,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814389242] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:56,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502875886] [2021-07-13 19:26:56,006 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 [2021-07-13 19:26:56,029 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:26:56,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:56,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:26:56,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:56,086 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:56,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502875886] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:56,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:56,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-13 19:26:56,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771512406] [2021-07-13 19:26:56,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:26:56,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:56,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:26:56,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:26:56,087 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) [2021-07-13 19:26:56,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:56,792 INFO L93 Difference]: Finished difference Result 40819 states and 161536 transitions. [2021-07-13 19:26:56,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:26:56,793 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 [2021-07-13 19:26:56,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:56,949 INFO L225 Difference]: With dead ends: 40819 [2021-07-13 19:26:56,949 INFO L226 Difference]: Without dead ends: 40578 [2021-07-13 19:26:56,949 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 232.0ms TimeCoverageRelationStatistics Valid=229, Invalid=827, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:26:57,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40578 states. [2021-07-13 19:26:57,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40578 to 24036. [2021-07-13 19:26:57,717 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) [2021-07-13 19:26:57,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24036 states to 24036 states and 102137 transitions. [2021-07-13 19:26:57,821 INFO L78 Accepts]: Start accepts. Automaton has 24036 states and 102137 transitions. Word has length 28 [2021-07-13 19:26:57,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:57,822 INFO L482 AbstractCegarLoop]: Abstraction has 24036 states and 102137 transitions. [2021-07-13 19:26:57,822 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) [2021-07-13 19:26:57,822 INFO L276 IsEmpty]: Start isEmpty. Operand 24036 states and 102137 transitions. [2021-07-13 19:26:57,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 19:26:57,885 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:57,885 INFO L508 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] [2021-07-13 19:26:58,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-07-13 19:26:58,086 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:58,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:58,086 INFO L82 PathProgramCache]: Analyzing trace with hash 165103934, now seen corresponding path program 6 times [2021-07-13 19:26:58,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:58,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076194311] [2021-07-13 19:26:58,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:58,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:58,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:58,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:58,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076194311] [2021-07-13 19:26:58,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076194311] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:58,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708838945] [2021-07-13 19:26:58,105 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 [2021-07-13 19:26:58,131 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:26:58,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:58,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:26:58,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:58,207 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:58,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708838945] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:58,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:58,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-07-13 19:26:58,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218584312] [2021-07-13 19:26:58,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:26:58,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:58,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:26:58,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:26:58,209 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) [2021-07-13 19:26:58,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:58,931 INFO L93 Difference]: Finished difference Result 42953 states and 171667 transitions. [2021-07-13 19:26:58,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:26:58,932 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 [2021-07-13 19:26:58,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:59,109 INFO L225 Difference]: With dead ends: 42953 [2021-07-13 19:26:59,110 INFO L226 Difference]: Without dead ends: 42953 [2021-07-13 19:26:59,110 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 130.4ms TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:26:59,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42953 states. [2021-07-13 19:26:59,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42953 to 24036. [2021-07-13 19:26:59,910 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) [2021-07-13 19:27:00,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24036 states to 24036 states and 101627 transitions. [2021-07-13 19:27:00,017 INFO L78 Accepts]: Start accepts. Automaton has 24036 states and 101627 transitions. Word has length 28 [2021-07-13 19:27:00,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:00,017 INFO L482 AbstractCegarLoop]: Abstraction has 24036 states and 101627 transitions. [2021-07-13 19:27:00,017 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) [2021-07-13 19:27:00,017 INFO L276 IsEmpty]: Start isEmpty. Operand 24036 states and 101627 transitions. [2021-07-13 19:27:00,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 19:27:00,076 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:00,076 INFO L508 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] [2021-07-13 19:27:00,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-07-13 19:27:00,285 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:00,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:00,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1784850851, now seen corresponding path program 7 times [2021-07-13 19:27:00,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:00,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613421499] [2021-07-13 19:27:00,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:00,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:00,317 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:00,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:00,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613421499] [2021-07-13 19:27:00,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613421499] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:00,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191031036] [2021-07-13 19:27:00,318 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 [2021-07-13 19:27:00,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:00,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:27:00,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:00,412 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:00,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191031036] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:00,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:00,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-07-13 19:27:00,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71987356] [2021-07-13 19:27:00,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:27:00,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:00,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:27:00,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:27:00,413 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) [2021-07-13 19:27:00,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:00,811 INFO L93 Difference]: Finished difference Result 29179 states and 119232 transitions. [2021-07-13 19:27:00,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:27:00,811 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 [2021-07-13 19:27:00,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:00,927 INFO L225 Difference]: With dead ends: 29179 [2021-07-13 19:27:00,927 INFO L226 Difference]: Without dead ends: 29131 [2021-07-13 19:27:00,928 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 89.5ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:27:00,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29131 states. [2021-07-13 19:27:01,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29131 to 24202. [2021-07-13 19:27:01,570 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) [2021-07-13 19:27:01,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24202 states to 24202 states and 102208 transitions. [2021-07-13 19:27:01,658 INFO L78 Accepts]: Start accepts. Automaton has 24202 states and 102208 transitions. Word has length 28 [2021-07-13 19:27:01,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:01,658 INFO L482 AbstractCegarLoop]: Abstraction has 24202 states and 102208 transitions. [2021-07-13 19:27:01,659 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) [2021-07-13 19:27:01,659 INFO L276 IsEmpty]: Start isEmpty. Operand 24202 states and 102208 transitions. [2021-07-13 19:27:01,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 19:27:01,710 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:01,710 INFO L508 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] [2021-07-13 19:27:01,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:27:01,911 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:01,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:01,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1672080553, now seen corresponding path program 8 times [2021-07-13 19:27:01,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:01,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987957683] [2021-07-13 19:27:01,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:01,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:01,947 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:27:01,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:01,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987957683] [2021-07-13 19:27:01,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987957683] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:01,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637387801] [2021-07-13 19:27:01,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:27:01,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:27:01,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:27:01,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:27:01,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:02,048 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:02,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637387801] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:02,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:02,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 9 [2021-07-13 19:27:02,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869363528] [2021-07-13 19:27:02,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:27:02,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:02,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:27:02,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:27:02,049 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) [2021-07-13 19:27:02,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:02,720 INFO L93 Difference]: Finished difference Result 49310 states and 196485 transitions. [2021-07-13 19:27:02,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:27:02,720 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 [2021-07-13 19:27:02,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:02,933 INFO L225 Difference]: With dead ends: 49310 [2021-07-13 19:27:02,933 INFO L226 Difference]: Without dead ends: 49310 [2021-07-13 19:27:02,934 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 144.0ms TimeCoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:27:03,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49310 states. [2021-07-13 19:27:03,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49310 to 24542. [2021-07-13 19:27:03,862 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) [2021-07-13 19:27:03,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24542 states to 24542 states and 103408 transitions. [2021-07-13 19:27:03,961 INFO L78 Accepts]: Start accepts. Automaton has 24542 states and 103408 transitions. Word has length 28 [2021-07-13 19:27:03,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:03,961 INFO L482 AbstractCegarLoop]: Abstraction has 24542 states and 103408 transitions. [2021-07-13 19:27:03,962 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) [2021-07-13 19:27:03,962 INFO L276 IsEmpty]: Start isEmpty. Operand 24542 states and 103408 transitions. [2021-07-13 19:27:04,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 19:27:04,022 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:04,022 INFO L508 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] [2021-07-13 19:27:04,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-07-13 19:27:04,223 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:04,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:04,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1854451132, now seen corresponding path program 9 times [2021-07-13 19:27:04,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:04,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441291279] [2021-07-13 19:27:04,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:04,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:04,243 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:27:04,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:04,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441291279] [2021-07-13 19:27:04,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441291279] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:04,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869030997] [2021-07-13 19:27:04,243 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 [2021-07-13 19:27:04,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:27:04,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:27:04,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:27:04,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:04,350 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:04,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869030997] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:04,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:04,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 9 [2021-07-13 19:27:04,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210046371] [2021-07-13 19:27:04,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:27:04,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:04,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:27:04,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:27:04,352 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) [2021-07-13 19:27:05,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:05,001 INFO L93 Difference]: Finished difference Result 43190 states and 171488 transitions. [2021-07-13 19:27:05,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:27:05,001 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 [2021-07-13 19:27:05,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:05,157 INFO L225 Difference]: With dead ends: 43190 [2021-07-13 19:27:05,158 INFO L226 Difference]: Without dead ends: 43115 [2021-07-13 19:27:05,158 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 143.2ms TimeCoverageRelationStatistics Valid=144, Invalid=456, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:27:05,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43115 states. [2021-07-13 19:27:05,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43115 to 24542. [2021-07-13 19:27:05,952 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) [2021-07-13 19:27:06,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24542 states to 24542 states and 103384 transitions. [2021-07-13 19:27:06,055 INFO L78 Accepts]: Start accepts. Automaton has 24542 states and 103384 transitions. Word has length 28 [2021-07-13 19:27:06,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:06,055 INFO L482 AbstractCegarLoop]: Abstraction has 24542 states and 103384 transitions. [2021-07-13 19:27:06,055 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) [2021-07-13 19:27:06,055 INFO L276 IsEmpty]: Start isEmpty. Operand 24542 states and 103384 transitions. [2021-07-13 19:27:06,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 19:27:06,115 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:06,115 INFO L508 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] [2021-07-13 19:27:06,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-07-13 19:27:06,316 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:06,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:06,316 INFO L82 PathProgramCache]: Analyzing trace with hash 975011082, now seen corresponding path program 10 times [2021-07-13 19:27:06,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:06,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744550152] [2021-07-13 19:27:06,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:06,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:06,338 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:06,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:06,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744550152] [2021-07-13 19:27:06,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744550152] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:06,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087963236] [2021-07-13 19:27:06,339 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 [2021-07-13 19:27:06,365 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:27:06,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:27:06,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:27:06,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:06,442 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:06,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087963236] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:06,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:06,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 9 [2021-07-13 19:27:06,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171885550] [2021-07-13 19:27:06,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:27:06,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:06,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:27:06,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:27:06,443 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) [2021-07-13 19:27:07,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:07,232 INFO L93 Difference]: Finished difference Result 51588 states and 205543 transitions. [2021-07-13 19:27:07,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:27:07,232 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 [2021-07-13 19:27:07,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:07,956 INFO L225 Difference]: With dead ends: 51588 [2021-07-13 19:27:07,956 INFO L226 Difference]: Without dead ends: 51588 [2021-07-13 19:27:07,956 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 173.5ms TimeCoverageRelationStatistics Valid=184, Invalid=572, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:27:08,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51588 states. [2021-07-13 19:27:09,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51588 to 24882. [2021-07-13 19:27:09,170 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) [2021-07-13 19:27:09,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24882 states to 24882 states and 104754 transitions. [2021-07-13 19:27:09,444 INFO L78 Accepts]: Start accepts. Automaton has 24882 states and 104754 transitions. Word has length 28 [2021-07-13 19:27:09,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:09,444 INFO L482 AbstractCegarLoop]: Abstraction has 24882 states and 104754 transitions. [2021-07-13 19:27:09,444 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) [2021-07-13 19:27:09,444 INFO L276 IsEmpty]: Start isEmpty. Operand 24882 states and 104754 transitions. [2021-07-13 19:27:09,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 19:27:09,535 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:09,535 INFO L508 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] [2021-07-13 19:27:09,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:27:09,736 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:09,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:09,736 INFO L82 PathProgramCache]: Analyzing trace with hash -974943703, now seen corresponding path program 11 times [2021-07-13 19:27:09,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:09,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050820895] [2021-07-13 19:27:09,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:09,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:09,759 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:09,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:09,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050820895] [2021-07-13 19:27:09,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050820895] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:09,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410181497] [2021-07-13 19:27:09,759 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 [2021-07-13 19:27:09,784 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:27:09,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:27:09,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:27:09,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:09,854 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:09,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410181497] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:09,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:09,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 9 [2021-07-13 19:27:09,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665662740] [2021-07-13 19:27:09,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:27:09,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:09,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:27:09,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:27:09,855 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) [2021-07-13 19:27:10,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:10,591 INFO L93 Difference]: Finished difference Result 39744 states and 158044 transitions. [2021-07-13 19:27:10,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:27:10,592 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 [2021-07-13 19:27:10,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:10,877 INFO L225 Difference]: With dead ends: 39744 [2021-07-13 19:27:10,877 INFO L226 Difference]: Without dead ends: 39696 [2021-07-13 19:27:10,878 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 127.8ms TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:27:10,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39696 states. [2021-07-13 19:27:11,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39696 to 24882. [2021-07-13 19:27:11,707 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) [2021-07-13 19:27:11,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24882 states to 24882 states and 104730 transitions. [2021-07-13 19:27:11,813 INFO L78 Accepts]: Start accepts. Automaton has 24882 states and 104730 transitions. Word has length 28 [2021-07-13 19:27:11,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:11,813 INFO L482 AbstractCegarLoop]: Abstraction has 24882 states and 104730 transitions. [2021-07-13 19:27:11,814 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) [2021-07-13 19:27:11,814 INFO L276 IsEmpty]: Start isEmpty. Operand 24882 states and 104730 transitions. [2021-07-13 19:27:11,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 19:27:11,888 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:11,888 INFO L508 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] [2021-07-13 19:27:12,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-07-13 19:27:12,088 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:12,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:12,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1393922136, now seen corresponding path program 12 times [2021-07-13 19:27:12,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:12,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812604264] [2021-07-13 19:27:12,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:12,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:12,111 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:12,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:12,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812604264] [2021-07-13 19:27:12,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812604264] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:12,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338410040] [2021-07-13 19:27:12,112 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 [2021-07-13 19:27:12,137 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:27:12,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:27:12,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:27:12,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:12,211 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:12,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338410040] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:12,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:12,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-13 19:27:12,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653800044] [2021-07-13 19:27:12,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:27:12,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:12,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:27:12,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:27:12,213 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) [2021-07-13 19:27:13,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:13,450 INFO L93 Difference]: Finished difference Result 51567 states and 205376 transitions. [2021-07-13 19:27:13,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:27:13,451 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 [2021-07-13 19:27:13,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:13,699 INFO L225 Difference]: With dead ends: 51567 [2021-07-13 19:27:13,700 INFO L226 Difference]: Without dead ends: 51567 [2021-07-13 19:27:13,700 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 224.5ms TimeCoverageRelationStatistics Valid=215, Invalid=777, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:27:13,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51567 states. [2021-07-13 19:27:14,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51567 to 25308. [2021-07-13 19:27:14,802 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) [2021-07-13 19:27:14,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25308 states to 25308 states and 105837 transitions. [2021-07-13 19:27:14,913 INFO L78 Accepts]: Start accepts. Automaton has 25308 states and 105837 transitions. Word has length 28 [2021-07-13 19:27:14,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:14,913 INFO L482 AbstractCegarLoop]: Abstraction has 25308 states and 105837 transitions. [2021-07-13 19:27:14,913 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) [2021-07-13 19:27:14,913 INFO L276 IsEmpty]: Start isEmpty. Operand 25308 states and 105837 transitions. [2021-07-13 19:27:15,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 19:27:15,177 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:15,177 INFO L508 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] [2021-07-13 19:27:15,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:27:15,378 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:15,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:15,378 INFO L82 PathProgramCache]: Analyzing trace with hash 770340333, now seen corresponding path program 13 times [2021-07-13 19:27:15,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:15,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260206215] [2021-07-13 19:27:15,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:15,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:15,405 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:15,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:15,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260206215] [2021-07-13 19:27:15,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260206215] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:15,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504052968] [2021-07-13 19:27:15,406 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:27:15,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:15,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:27:15,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:15,510 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:15,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504052968] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:15,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:15,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-13 19:27:15,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518998814] [2021-07-13 19:27:15,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:27:15,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:15,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:27:15,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:27:15,512 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) [2021-07-13 19:27:16,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:16,253 INFO L93 Difference]: Finished difference Result 35545 states and 141251 transitions. [2021-07-13 19:27:16,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:27:16,253 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 [2021-07-13 19:27:16,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:16,412 INFO L225 Difference]: With dead ends: 35545 [2021-07-13 19:27:16,412 INFO L226 Difference]: Without dead ends: 35497 [2021-07-13 19:27:16,413 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 154.5ms TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:27:16,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35497 states. [2021-07-13 19:27:17,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35497 to 25624. [2021-07-13 19:27:17,391 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) [2021-07-13 19:27:17,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25624 states to 25624 states and 106941 transitions. [2021-07-13 19:27:17,498 INFO L78 Accepts]: Start accepts. Automaton has 25624 states and 106941 transitions. Word has length 28 [2021-07-13 19:27:17,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:17,498 INFO L482 AbstractCegarLoop]: Abstraction has 25624 states and 106941 transitions. [2021-07-13 19:27:17,498 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) [2021-07-13 19:27:17,498 INFO L276 IsEmpty]: Start isEmpty. Operand 25624 states and 106941 transitions. [2021-07-13 19:27:17,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 19:27:17,567 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:17,567 INFO L508 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] [2021-07-13 19:27:17,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-07-13 19:27:17,769 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:17,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:17,769 INFO L82 PathProgramCache]: Analyzing trace with hash 778555929, now seen corresponding path program 14 times [2021-07-13 19:27:17,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:17,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31978622] [2021-07-13 19:27:17,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:17,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:17,788 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:27:17,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:17,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31978622] [2021-07-13 19:27:17,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31978622] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:17,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146700156] [2021-07-13 19:27:17,789 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 [2021-07-13 19:27:17,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:27:17,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:27:17,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:27:17,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:17,903 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:17,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146700156] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:17,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:17,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-07-13 19:27:17,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589613045] [2021-07-13 19:27:17,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:27:17,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:17,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:27:17,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:27:17,904 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) [2021-07-13 19:27:18,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:18,592 INFO L93 Difference]: Finished difference Result 46151 states and 182270 transitions. [2021-07-13 19:27:18,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:27:18,593 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 [2021-07-13 19:27:18,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:18,798 INFO L225 Difference]: With dead ends: 46151 [2021-07-13 19:27:18,798 INFO L226 Difference]: Without dead ends: 46151 [2021-07-13 19:27:18,799 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 113.4ms TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:27:19,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46151 states. [2021-07-13 19:27:19,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46151 to 25624. [2021-07-13 19:27:19,886 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) [2021-07-13 19:27:20,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25624 states to 25624 states and 106771 transitions. [2021-07-13 19:27:20,014 INFO L78 Accepts]: Start accepts. Automaton has 25624 states and 106771 transitions. Word has length 28 [2021-07-13 19:27:20,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:20,014 INFO L482 AbstractCegarLoop]: Abstraction has 25624 states and 106771 transitions. [2021-07-13 19:27:20,015 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) [2021-07-13 19:27:20,015 INFO L276 IsEmpty]: Start isEmpty. Operand 25624 states and 106771 transitions. [2021-07-13 19:27:20,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 19:27:20,101 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:20,101 INFO L508 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] [2021-07-13 19:27:20,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-07-13 19:27:20,302 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:20,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:20,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1546991540, now seen corresponding path program 15 times [2021-07-13 19:27:20,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:20,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613944689] [2021-07-13 19:27:20,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:20,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:20,330 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:27:20,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:20,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613944689] [2021-07-13 19:27:20,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613944689] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:20,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041924910] [2021-07-13 19:27:20,331 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 [2021-07-13 19:27:20,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:27:20,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:27:20,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:27:20,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:20,590 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:20,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041924910] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:20,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:20,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-07-13 19:27:20,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585823708] [2021-07-13 19:27:20,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:27:20,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:20,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:27:20,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:27:20,591 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) [2021-07-13 19:27:21,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:21,097 INFO L93 Difference]: Finished difference Result 32707 states and 131617 transitions. [2021-07-13 19:27:21,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:27:21,098 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 [2021-07-13 19:27:21,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:21,366 INFO L225 Difference]: With dead ends: 32707 [2021-07-13 19:27:21,366 INFO L226 Difference]: Without dead ends: 32682 [2021-07-13 19:27:21,366 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 95.9ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:27:21,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32682 states. [2021-07-13 19:27:21,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32682 to 25624. [2021-07-13 19:27:21,962 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) [2021-07-13 19:27:22,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25624 states to 25624 states and 106759 transitions. [2021-07-13 19:27:22,076 INFO L78 Accepts]: Start accepts. Automaton has 25624 states and 106759 transitions. Word has length 28 [2021-07-13 19:27:22,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:22,076 INFO L482 AbstractCegarLoop]: Abstraction has 25624 states and 106759 transitions. [2021-07-13 19:27:22,076 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) [2021-07-13 19:27:22,076 INFO L276 IsEmpty]: Start isEmpty. Operand 25624 states and 106759 transitions. [2021-07-13 19:27:22,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 19:27:22,149 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:22,150 INFO L508 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] [2021-07-13 19:27:22,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-07-13 19:27:22,350 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:22,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:22,351 INFO L82 PathProgramCache]: Analyzing trace with hash 81486458, now seen corresponding path program 16 times [2021-07-13 19:27:22,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:22,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618492127] [2021-07-13 19:27:22,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:22,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:22,377 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:27:22,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:22,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618492127] [2021-07-13 19:27:22,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618492127] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:22,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621302972] [2021-07-13 19:27:22,378 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 [2021-07-13 19:27:22,402 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:27:22,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:27:22,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:27:22,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:22,463 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:22,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621302972] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:22,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:22,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-07-13 19:27:22,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413472325] [2021-07-13 19:27:22,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:27:22,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:22,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:27:22,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:27:22,464 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) [2021-07-13 19:27:23,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:23,241 INFO L93 Difference]: Finished difference Result 38112 states and 153561 transitions. [2021-07-13 19:27:23,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:27:23,241 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 [2021-07-13 19:27:23,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:23,405 INFO L225 Difference]: With dead ends: 38112 [2021-07-13 19:27:23,405 INFO L226 Difference]: Without dead ends: 38112 [2021-07-13 19:27:23,406 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 130.3ms TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:27:23,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38112 states. [2021-07-13 19:27:24,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38112 to 25794. [2021-07-13 19:27:24,314 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) [2021-07-13 19:27:24,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25794 states to 25794 states and 107444 transitions. [2021-07-13 19:27:24,423 INFO L78 Accepts]: Start accepts. Automaton has 25794 states and 107444 transitions. Word has length 28 [2021-07-13 19:27:24,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:24,423 INFO L482 AbstractCegarLoop]: Abstraction has 25794 states and 107444 transitions. [2021-07-13 19:27:24,423 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) [2021-07-13 19:27:24,423 INFO L276 IsEmpty]: Start isEmpty. Operand 25794 states and 107444 transitions. [2021-07-13 19:27:24,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 19:27:24,492 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:24,492 INFO L508 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] [2021-07-13 19:27:24,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-07-13 19:27:24,695 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:24,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:24,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1868468327, now seen corresponding path program 17 times [2021-07-13 19:27:24,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:24,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573449959] [2021-07-13 19:27:24,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:24,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:24,716 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:27:24,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:24,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573449959] [2021-07-13 19:27:24,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573449959] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:24,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133655929] [2021-07-13 19:27:24,717 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 [2021-07-13 19:27:24,741 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:27:24,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:27:24,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:27:24,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:24,811 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:24,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133655929] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:24,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:24,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-07-13 19:27:24,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955628259] [2021-07-13 19:27:24,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:27:24,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:24,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:27:24,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:27:24,812 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) [2021-07-13 19:27:25,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:25,525 INFO L93 Difference]: Finished difference Result 39804 states and 156168 transitions. [2021-07-13 19:27:25,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:27:25,525 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 [2021-07-13 19:27:25,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:25,683 INFO L225 Difference]: With dead ends: 39804 [2021-07-13 19:27:25,683 INFO L226 Difference]: Without dead ends: 39780 [2021-07-13 19:27:25,684 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 121.2ms TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:27:25,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39780 states. [2021-07-13 19:27:26,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39780 to 25794. [2021-07-13 19:27:26,688 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) [2021-07-13 19:27:26,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25794 states to 25794 states and 107432 transitions. [2021-07-13 19:27:26,808 INFO L78 Accepts]: Start accepts. Automaton has 25794 states and 107432 transitions. Word has length 28 [2021-07-13 19:27:26,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:26,808 INFO L482 AbstractCegarLoop]: Abstraction has 25794 states and 107432 transitions. [2021-07-13 19:27:26,808 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) [2021-07-13 19:27:26,808 INFO L276 IsEmpty]: Start isEmpty. Operand 25794 states and 107432 transitions. [2021-07-13 19:27:26,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 19:27:26,881 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:26,881 INFO L508 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] [2021-07-13 19:27:27,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:27:27,082 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:27,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:27,082 INFO L82 PathProgramCache]: Analyzing trace with hash 2007520536, now seen corresponding path program 18 times [2021-07-13 19:27:27,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:27,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729206900] [2021-07-13 19:27:27,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:27,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:27,103 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:27,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:27,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729206900] [2021-07-13 19:27:27,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729206900] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:27,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274868988] [2021-07-13 19:27:27,104 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 [2021-07-13 19:27:27,135 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:27:27,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:27:27,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:27:27,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:27,194 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:27,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274868988] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:27,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:27,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-07-13 19:27:27,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796286351] [2021-07-13 19:27:27,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:27:27,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:27,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:27:27,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:27:27,195 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) [2021-07-13 19:27:28,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:28,315 INFO L93 Difference]: Finished difference Result 48289 states and 195910 transitions. [2021-07-13 19:27:28,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:27:28,315 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 [2021-07-13 19:27:28,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:28,675 INFO L225 Difference]: With dead ends: 48289 [2021-07-13 19:27:28,676 INFO L226 Difference]: Without dead ends: 48289 [2021-07-13 19:27:28,676 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 204.1ms TimeCoverageRelationStatistics Valid=185, Invalid=745, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:27:28,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48289 states. [2021-07-13 19:27:29,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48289 to 25964. [2021-07-13 19:27:29,551 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) [2021-07-13 19:27:29,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25964 states to 25964 states and 108117 transitions. [2021-07-13 19:27:29,661 INFO L78 Accepts]: Start accepts. Automaton has 25964 states and 108117 transitions. Word has length 28 [2021-07-13 19:27:29,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:29,661 INFO L482 AbstractCegarLoop]: Abstraction has 25964 states and 108117 transitions. [2021-07-13 19:27:29,661 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) [2021-07-13 19:27:29,661 INFO L276 IsEmpty]: Start isEmpty. Operand 25964 states and 108117 transitions. [2021-07-13 19:27:29,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 19:27:29,725 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:29,725 INFO L508 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] [2021-07-13 19:27:29,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-07-13 19:27:29,926 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:29,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:29,926 INFO L82 PathProgramCache]: Analyzing trace with hash -123184291, now seen corresponding path program 19 times [2021-07-13 19:27:29,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:29,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550812460] [2021-07-13 19:27:29,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:29,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:29,948 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:29,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:29,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550812460] [2021-07-13 19:27:29,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550812460] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:29,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193923869] [2021-07-13 19:27:29,949 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 [2021-07-13 19:27:29,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:29,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:27:29,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:30,058 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:30,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193923869] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:30,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:30,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-07-13 19:27:30,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509951179] [2021-07-13 19:27:30,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:27:30,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:30,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:27:30,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:27:30,059 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) [2021-07-13 19:27:30,362 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2021-07-13 19:27:31,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:31,022 INFO L93 Difference]: Finished difference Result 47194 states and 183148 transitions. [2021-07-13 19:27:31,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:27:31,023 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 [2021-07-13 19:27:31,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:31,461 INFO L225 Difference]: With dead ends: 47194 [2021-07-13 19:27:31,461 INFO L226 Difference]: Without dead ends: 47098 [2021-07-13 19:27:31,461 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 462.8ms TimeCoverageRelationStatistics Valid=211, Invalid=781, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:27:31,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47098 states. [2021-07-13 19:27:32,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47098 to 25964. [2021-07-13 19:27:32,317 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) [2021-07-13 19:27:32,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25964 states to 25964 states and 108105 transitions. [2021-07-13 19:27:32,423 INFO L78 Accepts]: Start accepts. Automaton has 25964 states and 108105 transitions. Word has length 28 [2021-07-13 19:27:32,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:32,423 INFO L482 AbstractCegarLoop]: Abstraction has 25964 states and 108105 transitions. [2021-07-13 19:27:32,423 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) [2021-07-13 19:27:32,423 INFO L276 IsEmpty]: Start isEmpty. Operand 25964 states and 108105 transitions. [2021-07-13 19:27:32,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 19:27:32,657 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:32,657 INFO L508 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] [2021-07-13 19:27:32,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:27:32,873 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:32,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:32,874 INFO L82 PathProgramCache]: Analyzing trace with hash 740063358, now seen corresponding path program 20 times [2021-07-13 19:27:32,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:32,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797752528] [2021-07-13 19:27:32,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:32,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:32,907 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:32,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:32,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797752528] [2021-07-13 19:27:32,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797752528] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:32,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156906297] [2021-07-13 19:27:32,907 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 [2021-07-13 19:27:32,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:27:32,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:27:32,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:27:32,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:33,026 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:33,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156906297] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:33,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:33,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-13 19:27:33,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940612221] [2021-07-13 19:27:33,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:27:33,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:33,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:27:33,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:27:33,028 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) [2021-07-13 19:27:34,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:34,115 INFO L93 Difference]: Finished difference Result 38914 states and 158503 transitions. [2021-07-13 19:27:34,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:27:34,115 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 [2021-07-13 19:27:34,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:34,284 INFO L225 Difference]: With dead ends: 38914 [2021-07-13 19:27:34,284 INFO L226 Difference]: Without dead ends: 38914 [2021-07-13 19:27:34,284 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 309.9ms TimeCoverageRelationStatistics Valid=267, Invalid=923, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:27:34,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38914 states. [2021-07-13 19:27:34,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38914 to 26620. [2021-07-13 19:27:35,030 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) [2021-07-13 19:27:35,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26620 states to 26620 states and 110209 transitions. [2021-07-13 19:27:35,141 INFO L78 Accepts]: Start accepts. Automaton has 26620 states and 110209 transitions. Word has length 28 [2021-07-13 19:27:35,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:35,141 INFO L482 AbstractCegarLoop]: Abstraction has 26620 states and 110209 transitions. [2021-07-13 19:27:35,141 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) [2021-07-13 19:27:35,141 INFO L276 IsEmpty]: Start isEmpty. Operand 26620 states and 110209 transitions. [2021-07-13 19:27:35,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 19:27:35,214 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:35,214 INFO L508 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] [2021-07-13 19:27:35,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:27:35,415 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:35,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:35,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1153142681, now seen corresponding path program 21 times [2021-07-13 19:27:35,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:35,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837802469] [2021-07-13 19:27:35,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:35,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:35,447 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:35,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:35,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837802469] [2021-07-13 19:27:35,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837802469] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:35,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765777687] [2021-07-13 19:27:35,447 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 [2021-07-13 19:27:35,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:27:35,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:27:35,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:27:35,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:35,733 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:35,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765777687] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:35,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:35,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-13 19:27:35,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032345375] [2021-07-13 19:27:35,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:27:35,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:35,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:27:35,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:27:35,734 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) [2021-07-13 19:27:36,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:36,469 INFO L93 Difference]: Finished difference Result 41610 states and 161108 transitions. [2021-07-13 19:27:36,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:27:36,469 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 [2021-07-13 19:27:36,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:36,805 INFO L225 Difference]: With dead ends: 41610 [2021-07-13 19:27:36,805 INFO L226 Difference]: Without dead ends: 41514 [2021-07-13 19:27:36,805 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 429.7ms TimeCoverageRelationStatistics Valid=198, Invalid=732, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:27:36,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41514 states. [2021-07-13 19:27:37,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41514 to 27244. [2021-07-13 19:27:37,638 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) [2021-07-13 19:27:37,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27244 states to 27244 states and 112395 transitions. [2021-07-13 19:27:37,757 INFO L78 Accepts]: Start accepts. Automaton has 27244 states and 112395 transitions. Word has length 28 [2021-07-13 19:27:37,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:37,757 INFO L482 AbstractCegarLoop]: Abstraction has 27244 states and 112395 transitions. [2021-07-13 19:27:37,757 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) [2021-07-13 19:27:37,757 INFO L276 IsEmpty]: Start isEmpty. Operand 27244 states and 112395 transitions. [2021-07-13 19:27:37,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 19:27:37,829 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:37,829 INFO L508 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] [2021-07-13 19:27:38,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-07-13 19:27:38,029 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:38,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:38,030 INFO L82 PathProgramCache]: Analyzing trace with hash -73330929, now seen corresponding path program 22 times [2021-07-13 19:27:38,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:38,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120798492] [2021-07-13 19:27:38,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:38,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:38,066 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:38,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:38,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120798492] [2021-07-13 19:27:38,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120798492] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:38,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503521178] [2021-07-13 19:27:38,066 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 [2021-07-13 19:27:38,089 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:27:38,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:27:38,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:27:38,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:38,181 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:38,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503521178] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:38,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:38,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-13 19:27:38,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203591581] [2021-07-13 19:27:38,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:27:38,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:38,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:27:38,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:27:38,182 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) [2021-07-13 19:27:39,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:39,238 INFO L93 Difference]: Finished difference Result 48209 states and 191672 transitions. [2021-07-13 19:27:39,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:27:39,239 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 [2021-07-13 19:27:39,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:39,644 INFO L225 Difference]: With dead ends: 48209 [2021-07-13 19:27:39,644 INFO L226 Difference]: Without dead ends: 48209 [2021-07-13 19:27:39,644 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 215.1ms TimeCoverageRelationStatistics Valid=215, Invalid=777, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:27:39,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48209 states. [2021-07-13 19:27:40,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48209 to 26904. [2021-07-13 19:27:40,538 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) [2021-07-13 19:27:40,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26904 states to 26904 states and 110685 transitions. [2021-07-13 19:27:40,652 INFO L78 Accepts]: Start accepts. Automaton has 26904 states and 110685 transitions. Word has length 28 [2021-07-13 19:27:40,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:40,652 INFO L482 AbstractCegarLoop]: Abstraction has 26904 states and 110685 transitions. [2021-07-13 19:27:40,652 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) [2021-07-13 19:27:40,652 INFO L276 IsEmpty]: Start isEmpty. Operand 26904 states and 110685 transitions. [2021-07-13 19:27:40,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 19:27:40,722 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:40,722 INFO L508 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] [2021-07-13 19:27:40,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:27:40,929 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:40,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:40,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1673828536, now seen corresponding path program 23 times [2021-07-13 19:27:40,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:40,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791986417] [2021-07-13 19:27:40,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:40,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:40,956 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:40,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:40,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791986417] [2021-07-13 19:27:40,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791986417] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:40,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051473607] [2021-07-13 19:27:40,957 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:27:40,980 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:27:40,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:27:40,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:27:40,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:41,053 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:41,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051473607] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:41,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:41,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-13 19:27:41,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647419774] [2021-07-13 19:27:41,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:27:41,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:41,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:27:41,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:27:41,054 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) [2021-07-13 19:27:41,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:41,827 INFO L93 Difference]: Finished difference Result 35478 states and 139558 transitions. [2021-07-13 19:27:41,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:27:41,827 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 [2021-07-13 19:27:41,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:41,955 INFO L225 Difference]: With dead ends: 35478 [2021-07-13 19:27:41,955 INFO L226 Difference]: Without dead ends: 35428 [2021-07-13 19:27:41,955 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 155.4ms TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:27:42,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35428 states. [2021-07-13 19:27:42,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35428 to 26239. [2021-07-13 19:27:42,923 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) [2021-07-13 19:27:43,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26239 states to 26239 states and 107985 transitions. [2021-07-13 19:27:43,045 INFO L78 Accepts]: Start accepts. Automaton has 26239 states and 107985 transitions. Word has length 28 [2021-07-13 19:27:43,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:43,045 INFO L482 AbstractCegarLoop]: Abstraction has 26239 states and 107985 transitions. [2021-07-13 19:27:43,045 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) [2021-07-13 19:27:43,045 INFO L276 IsEmpty]: Start isEmpty. Operand 26239 states and 107985 transitions. [2021-07-13 19:27:43,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 19:27:43,122 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:43,122 INFO L508 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] [2021-07-13 19:27:43,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-07-13 19:27:43,339 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:43,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:43,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1595574120, now seen corresponding path program 24 times [2021-07-13 19:27:43,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:43,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026231763] [2021-07-13 19:27:43,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:43,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:43,400 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:43,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:43,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026231763] [2021-07-13 19:27:43,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026231763] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:43,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701128344] [2021-07-13 19:27:43,400 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 [2021-07-13 19:27:43,430 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:27:43,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:27:43,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:27:43,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:43,704 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:43,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701128344] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:43,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:43,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10] total 10 [2021-07-13 19:27:43,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834350090] [2021-07-13 19:27:43,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:27:43,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:43,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:27:43,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:27:43,706 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) [2021-07-13 19:27:44,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:44,555 INFO L93 Difference]: Finished difference Result 29258 states and 119012 transitions. [2021-07-13 19:27:44,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:27:44,556 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 [2021-07-13 19:27:44,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:44,663 INFO L225 Difference]: With dead ends: 29258 [2021-07-13 19:27:44,663 INFO L226 Difference]: Without dead ends: 29122 [2021-07-13 19:27:44,663 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 119.8ms TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:27:44,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29122 states. [2021-07-13 19:27:45,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29122 to 26985. [2021-07-13 19:27:45,327 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) [2021-07-13 19:27:45,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26985 states to 26985 states and 110935 transitions. [2021-07-13 19:27:45,593 INFO L78 Accepts]: Start accepts. Automaton has 26985 states and 110935 transitions. Word has length 31 [2021-07-13 19:27:45,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:45,593 INFO L482 AbstractCegarLoop]: Abstraction has 26985 states and 110935 transitions. [2021-07-13 19:27:45,593 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) [2021-07-13 19:27:45,593 INFO L276 IsEmpty]: Start isEmpty. Operand 26985 states and 110935 transitions. [2021-07-13 19:27:45,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 19:27:45,668 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:45,668 INFO L508 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] [2021-07-13 19:27:45,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:27:45,868 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:45,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:45,869 INFO L82 PathProgramCache]: Analyzing trace with hash -457978980, now seen corresponding path program 25 times [2021-07-13 19:27:45,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:45,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039326005] [2021-07-13 19:27:45,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:45,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:45,928 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:27:45,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:45,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039326005] [2021-07-13 19:27:45,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039326005] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:45,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73205564] [2021-07-13 19:27:45,929 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 [2021-07-13 19:27:46,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:46,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:27:46,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:46,247 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:46,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73205564] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:46,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:46,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10] total 11 [2021-07-13 19:27:46,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507131855] [2021-07-13 19:27:46,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:27:46,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:46,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:27:46,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:27:46,248 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) [2021-07-13 19:27:47,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:47,200 INFO L93 Difference]: Finished difference Result 30378 states and 123415 transitions. [2021-07-13 19:27:47,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:27:47,201 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 [2021-07-13 19:27:47,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:47,317 INFO L225 Difference]: With dead ends: 30378 [2021-07-13 19:27:47,318 INFO L226 Difference]: Without dead ends: 30174 [2021-07-13 19:27:47,318 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 148.9ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:27:47,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30174 states. [2021-07-13 19:27:47,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30174 to 27681. [2021-07-13 19:27:48,036 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) [2021-07-13 19:27:48,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27681 states to 27681 states and 113847 transitions. [2021-07-13 19:27:48,154 INFO L78 Accepts]: Start accepts. Automaton has 27681 states and 113847 transitions. Word has length 31 [2021-07-13 19:27:48,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:48,154 INFO L482 AbstractCegarLoop]: Abstraction has 27681 states and 113847 transitions. [2021-07-13 19:27:48,154 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) [2021-07-13 19:27:48,154 INFO L276 IsEmpty]: Start isEmpty. Operand 27681 states and 113847 transitions. [2021-07-13 19:27:48,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 19:27:48,225 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:48,225 INFO L508 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] [2021-07-13 19:27:48,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-07-13 19:27:48,425 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:48,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:48,426 INFO L82 PathProgramCache]: Analyzing trace with hash 383912552, now seen corresponding path program 26 times [2021-07-13 19:27:48,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:48,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346253806] [2021-07-13 19:27:48,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:48,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:48,478 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:27:48,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:48,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346253806] [2021-07-13 19:27:48,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346253806] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:48,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399718045] [2021-07-13 19:27:48,478 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 [2021-07-13 19:27:48,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:27:48,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:27:48,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:27:48,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:48,762 WARN L348 FreeRefinementEngine]: Global settings require throwing the following exception [2021-07-13 19:27:48,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-07-13 19:27:48,981 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:597) 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:367) 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) [2021-07-13 19:27:48,987 INFO L168 Benchmark]: Toolchain (without parser) took 86783.80 ms. Allocated memory was 177.2 MB in the beginning and 7.6 GB in the end (delta: 7.4 GB). Free memory was 157.1 MB in the beginning and 6.6 GB in the end (delta: -6.4 GB). Peak memory consumption was 992.1 MB. Max. memory is 8.0 GB. [2021-07-13 19:27:48,987 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 177.2 MB. Free memory is still 158.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-13 19:27:48,988 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.14 ms. Allocated memory is still 177.2 MB. Free memory was 157.1 MB in the beginning and 155.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-13 19:27:48,988 INFO L168 Benchmark]: Boogie Preprocessor took 14.18 ms. Allocated memory is still 177.2 MB. Free memory was 155.7 MB in the beginning and 154.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-13 19:27:48,988 INFO L168 Benchmark]: RCFGBuilder took 203.07 ms. Allocated memory is still 177.2 MB. Free memory was 154.6 MB in the beginning and 142.6 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-07-13 19:27:48,988 INFO L168 Benchmark]: TraceAbstraction took 86543.52 ms. Allocated memory was 177.2 MB in the beginning and 7.6 GB in the end (delta: 7.4 GB). Free memory was 142.3 MB in the beginning and 6.6 GB in the end (delta: -6.4 GB). Peak memory consumption was 977.4 MB. Max. memory is 8.0 GB. [2021-07-13 19:27:48,990 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 177.2 MB. Free memory is still 158.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 19.14 ms. Allocated memory is still 177.2 MB. Free memory was 157.1 MB in the beginning and 155.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 14.18 ms. Allocated memory is still 177.2 MB. Free memory was 155.7 MB in the beginning and 154.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 203.07 ms. Allocated memory is still 177.2 MB. Free memory was 154.6 MB in the beginning and 142.6 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 86543.52 ms. Allocated memory was 177.2 MB in the beginning and 7.6 GB in the end (delta: 7.4 GB). Free memory was 142.3 MB in the beginning and 6.6 GB in the end (delta: -6.4 GB). Peak memory consumption was 977.4 MB. Max. memory is 8.0 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...