/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/parray-copy.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-06 00:20:05,096 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-06 00:20:05,098 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-06 00:20:05,133 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-06 00:20:05,185 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-06 00:20:05,221 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-06 00:20:05,221 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-06 00:20:05,222 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-06 00:20:05,222 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-06 00:20:05,224 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-06 00:20:05,224 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-06 00:20:05,225 INFO L138 SettingsManager]: * Use SBE=true [2021-06-06 00:20:05,225 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-06 00:20:05,225 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-06 00:20:05,225 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-06 00:20:05,226 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-06 00:20:05,226 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-06 00:20:05,227 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-06 00:20:05,227 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-06 00:20:05,227 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-06 00:20:05,227 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-06 00:20:05,227 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-06 00:20:05,227 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-06 00:20:05,227 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-06 00:20:05,228 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-06 00:20:05,228 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-06 00:20:05,228 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-06 00:20:05,228 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-06 00:20:05,228 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-06 00:20:05,228 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-06 00:20:05,229 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-06 00:20:05,229 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-06 00:20:05,229 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-06 00:20:05,229 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-06 00:20:05,229 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-06 00:20:05,229 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-06 00:20:05,229 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-06 00:20:05,572 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-06 00:20:05,605 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-06 00:20:05,608 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-06 00:20:05,609 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-06 00:20:05,610 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-06 00:20:05,611 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/parray-copy.wvr.bpl [2021-06-06 00:20:05,611 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/parray-copy.wvr.bpl' [2021-06-06 00:20:05,649 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-06 00:20:05,650 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-06 00:20:05,651 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-06 00:20:05,652 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-06 00:20:05,652 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-06 00:20:05,664 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:20:05" (1/1) ... [2021-06-06 00:20:05,672 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:20:05" (1/1) ... [2021-06-06 00:20:05,679 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-06 00:20:05,680 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-06 00:20:05,680 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-06 00:20:05,681 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-06 00:20:05,688 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:20:05" (1/1) ... [2021-06-06 00:20:05,689 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:20:05" (1/1) ... [2021-06-06 00:20:05,690 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:20:05" (1/1) ... [2021-06-06 00:20:05,690 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:20:05" (1/1) ... [2021-06-06 00:20:05,693 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:20:05" (1/1) ... [2021-06-06 00:20:05,699 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:20:05" (1/1) ... [2021-06-06 00:20:05,699 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:20:05" (1/1) ... [2021-06-06 00:20:05,701 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-06 00:20:05,702 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-06 00:20:05,702 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-06 00:20:05,703 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-06 00:20:05,705 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:20:05" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-06 00:20:05,775 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-06 00:20:05,775 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-06 00:20:05,776 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-06 00:20:05,776 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-06 00:20:05,776 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-06 00:20:05,776 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-06 00:20:05,776 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-06 00:20:05,776 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-06 00:20:05,777 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-06 00:20:05,777 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-06 00:20:05,777 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-06 00:20:05,778 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-06 00:20:05,779 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-06 00:20:06,036 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-06 00:20:06,037 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-06 00:20:06,038 INFO L202 PluginConnector]: Adding new model parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.06 12:20:06 BoogieIcfgContainer [2021-06-06 00:20:06,038 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-06 00:20:06,040 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-06 00:20:06,040 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-06 00:20:06,042 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-06 00:20:06,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:20:05" (1/2) ... [2021-06-06 00:20:06,043 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d87ae2d and model type parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.06 12:20:06, skipping insertion in model container [2021-06-06 00:20:06,043 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.06 12:20:06" (2/2) ... [2021-06-06 00:20:06,044 INFO L111 eAbstractionObserver]: Analyzing ICFG parray-copy.wvr.bpl [2021-06-06 00:20:06,053 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-06 00:20:06,054 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-06 00:20:06,054 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-06 00:20:06,054 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-06 00:20:06,088 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-06 00:20:06,106 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-06 00:20:06,148 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-06 00:20:06,148 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-06 00:20:06,148 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-06 00:20:06,148 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-06 00:20:06,148 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-06 00:20:06,149 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-06 00:20:06,149 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-06 00:20:06,149 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-06 00:20:06,160 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 38 places, 31 transitions, 86 flow [2021-06-06 00:20:06,186 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 116 states, 114 states have (on average 2.7719298245614037) internal successors, (316), 115 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:06,188 INFO L276 IsEmpty]: Start isEmpty. Operand has 116 states, 114 states have (on average 2.7719298245614037) internal successors, (316), 115 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:06,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-06 00:20:06,199 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:20:06,199 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:20:06,200 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:20:06,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:20:06,206 INFO L82 PathProgramCache]: Analyzing trace with hash -482426042, now seen corresponding path program 1 times [2021-06-06 00:20:06,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:20:06,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281560355] [2021-06-06 00:20:06,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:20:06,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:20:06,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:06,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:20:06,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281560355] [2021-06-06 00:20:06,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281560355] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:20:06,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-06 00:20:06,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-06 00:20:06,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208718285] [2021-06-06 00:20:06,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-06 00:20:06,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:20:06,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-06 00:20:06,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-06 00:20:06,401 INFO L87 Difference]: Start difference. First operand has 116 states, 114 states have (on average 2.7719298245614037) internal successors, (316), 115 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:06,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:20:06,490 INFO L93 Difference]: Finished difference Result 135 states and 376 transitions. [2021-06-06 00:20:06,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-06 00:20:06,492 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-06 00:20:06,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:20:06,509 INFO L225 Difference]: With dead ends: 135 [2021-06-06 00:20:06,510 INFO L226 Difference]: Without dead ends: 135 [2021-06-06 00:20:06,511 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-06 00:20:06,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-06-06 00:20:06,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2021-06-06 00:20:06,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.8059701492537314) internal successors, (376), 134 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:06,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 376 transitions. [2021-06-06 00:20:06,547 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 376 transitions. Word has length 20 [2021-06-06 00:20:06,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:20:06,548 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 376 transitions. [2021-06-06 00:20:06,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:06,548 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 376 transitions. [2021-06-06 00:20:06,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-06 00:20:06,550 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:20:06,550 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:20:06,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-06 00:20:06,551 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:20:06,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:20:06,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1659723100, now seen corresponding path program 1 times [2021-06-06 00:20:06,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:20:06,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977885780] [2021-06-06 00:20:06,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:20:06,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:20:06,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:20:06,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:20:06,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977885780] [2021-06-06 00:20:06,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977885780] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:20:06,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-06 00:20:06,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-06 00:20:06,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437579767] [2021-06-06 00:20:06,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-06 00:20:06,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:20:06,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-06 00:20:06,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-06 00:20:06,603 INFO L87 Difference]: Start difference. First operand 135 states and 376 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:06,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:20:06,662 INFO L93 Difference]: Finished difference Result 185 states and 524 transitions. [2021-06-06 00:20:06,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-06 00:20:06,662 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-06 00:20:06,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:20:06,668 INFO L225 Difference]: With dead ends: 185 [2021-06-06 00:20:06,668 INFO L226 Difference]: Without dead ends: 185 [2021-06-06 00:20:06,669 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.0ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-06 00:20:06,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-06-06 00:20:06,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 160. [2021-06-06 00:20:06,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.830188679245283) internal successors, (450), 159 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:06,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 450 transitions. [2021-06-06 00:20:06,694 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 450 transitions. Word has length 22 [2021-06-06 00:20:06,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:20:06,694 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 450 transitions. [2021-06-06 00:20:06,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:06,694 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 450 transitions. [2021-06-06 00:20:06,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:20:06,696 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:20:06,696 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:20:06,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-06 00:20:06,696 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:20:06,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:20:06,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1666279556, now seen corresponding path program 1 times [2021-06-06 00:20:06,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:20:06,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239598476] [2021-06-06 00:20:06,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:20:06,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:20:07,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:07,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:20:07,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239598476] [2021-06-06 00:20:07,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239598476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:07,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446499529] [2021-06-06 00:20:07,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:20:07,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:20:07,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-06 00:20:07,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:20:07,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-06-06 00:20:07,521 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:20:07,529 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:20:07,534 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-06 00:20:07,535 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:20 [2021-06-06 00:20:07,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:07,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446499529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:07,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:20:07,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-06-06 00:20:07,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893686700] [2021-06-06 00:20:07,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:20:07,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:20:07,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:20:07,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:20:07,582 INFO L87 Difference]: Start difference. First operand 160 states and 450 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:08,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:20:08,066 INFO L93 Difference]: Finished difference Result 395 states and 1116 transitions. [2021-06-06 00:20:08,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-06 00:20:08,067 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:20:08,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:20:08,069 INFO L225 Difference]: With dead ends: 395 [2021-06-06 00:20:08,069 INFO L226 Difference]: Without dead ends: 280 [2021-06-06 00:20:08,069 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 662.6ms TimeCoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2021-06-06 00:20:08,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-06-06 00:20:08,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 194. [2021-06-06 00:20:08,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.8911917098445596) internal successors, (558), 193 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:08,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 558 transitions. [2021-06-06 00:20:08,084 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 558 transitions. Word has length 24 [2021-06-06 00:20:08,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:20:08,084 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 558 transitions. [2021-06-06 00:20:08,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:08,085 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 558 transitions. [2021-06-06 00:20:08,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:20:08,087 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:20:08,087 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:20:08,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-06-06 00:20:08,308 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:20:08,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:20:08,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1670859648, now seen corresponding path program 2 times [2021-06-06 00:20:08,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:20:08,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610254898] [2021-06-06 00:20:08,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:20:08,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:20:08,628 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:08,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:20:08,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610254898] [2021-06-06 00:20:08,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610254898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:08,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890767290] [2021-06-06 00:20:08,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:20:08,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:20:08,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:20:08,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-06 00:20:08,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:20:08,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-06-06 00:20:08,854 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:20:08,863 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:20:08,867 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-06 00:20:08,867 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:23 [2021-06-06 00:20:08,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:08,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890767290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:08,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:20:08,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-06 00:20:08,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302346679] [2021-06-06 00:20:08,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:20:08,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:20:08,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:20:08,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:20:08,991 INFO L87 Difference]: Start difference. First operand 194 states and 558 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:10,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:20:10,119 INFO L93 Difference]: Finished difference Result 639 states and 1800 transitions. [2021-06-06 00:20:10,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-06 00:20:10,120 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:20:10,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:20:10,124 INFO L225 Difference]: With dead ends: 639 [2021-06-06 00:20:10,124 INFO L226 Difference]: Without dead ends: 546 [2021-06-06 00:20:10,125 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 1072.2ms TimeCoverageRelationStatistics Valid=307, Invalid=1253, Unknown=0, NotChecked=0, Total=1560 [2021-06-06 00:20:10,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-06-06 00:20:10,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 281. [2021-06-06 00:20:10,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 2.8892857142857142) internal successors, (809), 280 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:10,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 809 transitions. [2021-06-06 00:20:10,143 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 809 transitions. Word has length 24 [2021-06-06 00:20:10,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:20:10,143 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 809 transitions. [2021-06-06 00:20:10,143 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:10,143 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 809 transitions. [2021-06-06 00:20:10,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:20:10,146 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:20:10,146 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:20:10,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:20:10,357 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:20:10,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:20:10,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1190941142, now seen corresponding path program 3 times [2021-06-06 00:20:10,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:20:10,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689505725] [2021-06-06 00:20:10,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:20:10,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:20:10,430 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:10,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:20:10,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689505725] [2021-06-06 00:20:10,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689505725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:10,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294159107] [2021-06-06 00:20:10,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:20:10,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-06 00:20:10,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:20:10,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-06 00:20:10,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:20:10,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-06-06 00:20:10,572 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:20:10,582 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:20:10,585 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-06 00:20:10,586 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:25 [2021-06-06 00:20:10,730 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-06 00:20:10,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294159107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:10,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:20:10,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-06 00:20:10,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935576938] [2021-06-06 00:20:10,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:20:10,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:20:10,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:20:10,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:20:10,732 INFO L87 Difference]: Start difference. First operand 281 states and 809 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:12,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:20:12,134 INFO L93 Difference]: Finished difference Result 1001 states and 2814 transitions. [2021-06-06 00:20:12,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-06 00:20:12,135 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:20:12,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:20:12,140 INFO L225 Difference]: With dead ends: 1001 [2021-06-06 00:20:12,140 INFO L226 Difference]: Without dead ends: 966 [2021-06-06 00:20:12,142 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 848.9ms TimeCoverageRelationStatistics Valid=549, Invalid=2757, Unknown=0, NotChecked=0, Total=3306 [2021-06-06 00:20:12,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 966 states. [2021-06-06 00:20:12,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 966 to 305. [2021-06-06 00:20:12,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.924342105263158) internal successors, (889), 304 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:12,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 889 transitions. [2021-06-06 00:20:12,158 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 889 transitions. Word has length 26 [2021-06-06 00:20:12,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:20:12,159 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 889 transitions. [2021-06-06 00:20:12,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:12,159 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 889 transitions. [2021-06-06 00:20:12,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:20:12,161 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:20:12,161 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:20:12,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:20:12,384 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:20:12,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:20:12,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1175480346, now seen corresponding path program 4 times [2021-06-06 00:20:12,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:20:12,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786004069] [2021-06-06 00:20:12,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:20:12,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:20:12,447 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:12,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:20:12,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786004069] [2021-06-06 00:20:12,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786004069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:12,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954366999] [2021-06-06 00:20:12,448 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:20:12,489 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:20:12,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:20:12,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:20:12,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:20:12,591 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:12,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954366999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:12,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:20:12,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-06 00:20:12,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477570367] [2021-06-06 00:20:12,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:20:12,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:20:12,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:20:12,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:20:12,593 INFO L87 Difference]: Start difference. First operand 305 states and 889 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:13,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:20:13,440 INFO L93 Difference]: Finished difference Result 1201 states and 3376 transitions. [2021-06-06 00:20:13,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-06 00:20:13,441 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:20:13,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:20:13,447 INFO L225 Difference]: With dead ends: 1201 [2021-06-06 00:20:13,447 INFO L226 Difference]: Without dead ends: 1201 [2021-06-06 00:20:13,448 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 516.1ms TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-06-06 00:20:13,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2021-06-06 00:20:13,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 365. [2021-06-06 00:20:13,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 3.0961538461538463) internal successors, (1127), 364 states have internal predecessors, (1127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:13,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 1127 transitions. [2021-06-06 00:20:13,467 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 1127 transitions. Word has length 26 [2021-06-06 00:20:13,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:20:13,468 INFO L482 AbstractCegarLoop]: Abstraction has 365 states and 1127 transitions. [2021-06-06 00:20:13,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:13,468 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 1127 transitions. [2021-06-06 00:20:13,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:20:13,470 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:20:13,470 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:20:13,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:20:13,684 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:20:13,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:20:13,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1693913438, now seen corresponding path program 5 times [2021-06-06 00:20:13,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:20:13,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73517187] [2021-06-06 00:20:13,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:20:13,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:20:13,750 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:13,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:20:13,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73517187] [2021-06-06 00:20:13,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73517187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:13,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853464090] [2021-06-06 00:20:13,751 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:20:13,778 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:20:13,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:20:13,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:20:13,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:20:13,876 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:13,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853464090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:13,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:20:13,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-06 00:20:13,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631153988] [2021-06-06 00:20:13,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:20:13,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:20:13,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:20:13,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:20:13,878 INFO L87 Difference]: Start difference. First operand 365 states and 1127 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:14,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:20:14,777 INFO L93 Difference]: Finished difference Result 1858 states and 5235 transitions. [2021-06-06 00:20:14,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-06 00:20:14,778 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:20:14,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:20:14,788 INFO L225 Difference]: With dead ends: 1858 [2021-06-06 00:20:14,789 INFO L226 Difference]: Without dead ends: 1858 [2021-06-06 00:20:14,789 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 503.9ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-06-06 00:20:14,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1858 states. [2021-06-06 00:20:14,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1858 to 388. [2021-06-06 00:20:14,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 3.1834625322997416) internal successors, (1232), 387 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:14,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 1232 transitions. [2021-06-06 00:20:14,818 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 1232 transitions. Word has length 26 [2021-06-06 00:20:14,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:20:14,818 INFO L482 AbstractCegarLoop]: Abstraction has 388 states and 1232 transitions. [2021-06-06 00:20:14,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:14,818 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 1232 transitions. [2021-06-06 00:20:14,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:20:14,821 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:20:14,821 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:20:15,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-06-06 00:20:15,037 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:20:15,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:20:15,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1481056820, now seen corresponding path program 6 times [2021-06-06 00:20:15,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:20:15,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279813423] [2021-06-06 00:20:15,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:20:15,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:20:15,101 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:15,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:20:15,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279813423] [2021-06-06 00:20:15,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279813423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:15,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163826601] [2021-06-06 00:20:15,103 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:20:15,145 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:20:15,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:20:15,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:20:15,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:20:15,238 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:15,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163826601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:15,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:20:15,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-06 00:20:15,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840921136] [2021-06-06 00:20:15,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:20:15,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:20:15,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:20:15,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:20:15,240 INFO L87 Difference]: Start difference. First operand 388 states and 1232 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:15,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:20:15,903 INFO L93 Difference]: Finished difference Result 1674 states and 4689 transitions. [2021-06-06 00:20:15,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-06 00:20:15,903 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:20:15,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:20:15,911 INFO L225 Difference]: With dead ends: 1674 [2021-06-06 00:20:15,912 INFO L226 Difference]: Without dead ends: 1670 [2021-06-06 00:20:15,912 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 365.1ms TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-06-06 00:20:15,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1670 states. [2021-06-06 00:20:15,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1670 to 402. [2021-06-06 00:20:15,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 3.1645885286783044) internal successors, (1269), 401 states have internal predecessors, (1269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:15,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1269 transitions. [2021-06-06 00:20:15,937 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1269 transitions. Word has length 26 [2021-06-06 00:20:15,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:20:15,938 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 1269 transitions. [2021-06-06 00:20:15,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:15,938 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1269 transitions. [2021-06-06 00:20:15,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:20:15,939 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:20:15,939 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:20:16,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:20:16,163 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:20:16,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:20:16,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1751566512, now seen corresponding path program 7 times [2021-06-06 00:20:16,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:20:16,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241398512] [2021-06-06 00:20:16,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:20:16,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:20:16,211 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:16,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:20:16,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241398512] [2021-06-06 00:20:16,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241398512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:16,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698224371] [2021-06-06 00:20:16,211 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:20:16,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:20:16,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:20:16,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:20:16,354 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:16,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698224371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:16,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:20:16,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-06 00:20:16,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468155329] [2021-06-06 00:20:16,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:20:16,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:20:16,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:20:16,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:20:16,359 INFO L87 Difference]: Start difference. First operand 402 states and 1269 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:17,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:20:17,045 INFO L93 Difference]: Finished difference Result 1844 states and 5052 transitions. [2021-06-06 00:20:17,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-06 00:20:17,045 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:20:17,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:20:17,053 INFO L225 Difference]: With dead ends: 1844 [2021-06-06 00:20:17,053 INFO L226 Difference]: Without dead ends: 1844 [2021-06-06 00:20:17,054 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 371.0ms TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2021-06-06 00:20:17,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2021-06-06 00:20:17,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 400. [2021-06-06 00:20:17,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 3.1679197994987467) internal successors, (1264), 399 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:17,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 1264 transitions. [2021-06-06 00:20:17,077 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 1264 transitions. Word has length 26 [2021-06-06 00:20:17,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:20:17,078 INFO L482 AbstractCegarLoop]: Abstraction has 400 states and 1264 transitions. [2021-06-06 00:20:17,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:17,078 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 1264 transitions. [2021-06-06 00:20:17,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:20:17,079 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:20:17,079 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:20:17,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:20:17,302 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:20:17,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:20:17,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1992513178, now seen corresponding path program 8 times [2021-06-06 00:20:17,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:20:17,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685608788] [2021-06-06 00:20:17,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:20:17,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:20:17,344 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:17,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:20:17,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685608788] [2021-06-06 00:20:17,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685608788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:17,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104380979] [2021-06-06 00:20:17,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:20:17,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:20:17,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:20:17,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:20:17,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:20:17,475 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:17,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104380979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:17,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:20:17,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-06 00:20:17,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831675137] [2021-06-06 00:20:17,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:20:17,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:20:17,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:20:17,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:20:17,477 INFO L87 Difference]: Start difference. First operand 400 states and 1264 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:17,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:20:17,974 INFO L93 Difference]: Finished difference Result 1308 states and 3890 transitions. [2021-06-06 00:20:17,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-06 00:20:17,974 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:20:17,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:20:17,979 INFO L225 Difference]: With dead ends: 1308 [2021-06-06 00:20:17,979 INFO L226 Difference]: Without dead ends: 1308 [2021-06-06 00:20:17,979 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 310.7ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:20:17,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2021-06-06 00:20:17,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 415. [2021-06-06 00:20:17,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 3.2294685990338166) internal successors, (1337), 414 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:17,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1337 transitions. [2021-06-06 00:20:17,997 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1337 transitions. Word has length 26 [2021-06-06 00:20:17,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:20:17,997 INFO L482 AbstractCegarLoop]: Abstraction has 415 states and 1337 transitions. [2021-06-06 00:20:17,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:17,997 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1337 transitions. [2021-06-06 00:20:17,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:20:17,999 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:20:17,999 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:20:18,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-06 00:20:18,213 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:20:18,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:20:18,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1182457080, now seen corresponding path program 9 times [2021-06-06 00:20:18,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:20:18,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280101670] [2021-06-06 00:20:18,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:20:18,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:20:18,264 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:18,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:20:18,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280101670] [2021-06-06 00:20:18,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280101670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:18,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595994053] [2021-06-06 00:20:18,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:20:18,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:20:18,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:20:18,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:20:18,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:20:18,372 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:18,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595994053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:18,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:20:18,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-06 00:20:18,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115536008] [2021-06-06 00:20:18,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:20:18,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:20:18,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:20:18,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:20:18,374 INFO L87 Difference]: Start difference. First operand 415 states and 1337 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:18,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:20:18,793 INFO L93 Difference]: Finished difference Result 1124 states and 3354 transitions. [2021-06-06 00:20:18,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-06 00:20:18,794 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:20:18,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:20:18,799 INFO L225 Difference]: With dead ends: 1124 [2021-06-06 00:20:18,799 INFO L226 Difference]: Without dead ends: 1120 [2021-06-06 00:20:18,799 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 241.2ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-06-06 00:20:18,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2021-06-06 00:20:18,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 421. [2021-06-06 00:20:18,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 3.2333333333333334) internal successors, (1358), 420 states have internal predecessors, (1358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:18,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 1358 transitions. [2021-06-06 00:20:18,814 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 1358 transitions. Word has length 26 [2021-06-06 00:20:18,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:20:18,815 INFO L482 AbstractCegarLoop]: Abstraction has 421 states and 1358 transitions. [2021-06-06 00:20:18,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:18,815 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 1358 transitions. [2021-06-06 00:20:18,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:20:18,816 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:20:18,816 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:20:19,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:20:19,017 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:20:19,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:20:19,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1452966772, now seen corresponding path program 10 times [2021-06-06 00:20:19,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:20:19,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090544156] [2021-06-06 00:20:19,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:20:19,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:20:19,055 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:19,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:20:19,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090544156] [2021-06-06 00:20:19,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090544156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:19,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325311207] [2021-06-06 00:20:19,056 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:20:19,081 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:20:19,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:20:19,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:20:19,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:20:19,168 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:19,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325311207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:19,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:20:19,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-06 00:20:19,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411933759] [2021-06-06 00:20:19,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:20:19,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:20:19,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:20:19,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:20:19,170 INFO L87 Difference]: Start difference. First operand 421 states and 1358 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:19,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:20:19,591 INFO L93 Difference]: Finished difference Result 1207 states and 3549 transitions. [2021-06-06 00:20:19,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-06 00:20:19,592 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:20:19,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:20:19,596 INFO L225 Difference]: With dead ends: 1207 [2021-06-06 00:20:19,596 INFO L226 Difference]: Without dead ends: 1207 [2021-06-06 00:20:19,596 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 270.6ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-06-06 00:20:19,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1207 states. [2021-06-06 00:20:19,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1207 to 415. [2021-06-06 00:20:19,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 3.2294685990338166) internal successors, (1337), 414 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:19,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1337 transitions. [2021-06-06 00:20:19,611 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1337 transitions. Word has length 26 [2021-06-06 00:20:19,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:20:19,612 INFO L482 AbstractCegarLoop]: Abstraction has 415 states and 1337 transitions. [2021-06-06 00:20:19,612 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:19,612 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1337 transitions. [2021-06-06 00:20:19,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:20:19,613 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:20:19,613 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:20:19,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:20:19,829 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:20:19,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:20:19,829 INFO L82 PathProgramCache]: Analyzing trace with hash 2037994958, now seen corresponding path program 11 times [2021-06-06 00:20:19,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:20:19,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447236111] [2021-06-06 00:20:19,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:20:19,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:20:19,875 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:19,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:20:19,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447236111] [2021-06-06 00:20:19,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447236111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:19,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474564881] [2021-06-06 00:20:19,875 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:20:19,929 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:20:19,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:20:19,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:20:19,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:20:20,002 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:20,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474564881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:20,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:20:20,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-06 00:20:20,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215999901] [2021-06-06 00:20:20,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:20:20,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:20:20,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:20:20,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:20:20,005 INFO L87 Difference]: Start difference. First operand 415 states and 1337 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:20,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:20:20,224 INFO L93 Difference]: Finished difference Result 824 states and 2512 transitions. [2021-06-06 00:20:20,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-06 00:20:20,224 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:20:20,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:20:20,228 INFO L225 Difference]: With dead ends: 824 [2021-06-06 00:20:20,228 INFO L226 Difference]: Without dead ends: 812 [2021-06-06 00:20:20,228 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 133.9ms TimeCoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2021-06-06 00:20:20,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2021-06-06 00:20:20,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 433. [2021-06-06 00:20:20,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 3.2175925925925926) internal successors, (1390), 432 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:20,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 1390 transitions. [2021-06-06 00:20:20,240 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 1390 transitions. Word has length 26 [2021-06-06 00:20:20,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:20:20,241 INFO L482 AbstractCegarLoop]: Abstraction has 433 states and 1390 transitions. [2021-06-06 00:20:20,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:20,241 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 1390 transitions. [2021-06-06 00:20:20,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:20:20,242 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:20:20,242 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:20:20,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-06-06 00:20:20,465 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:20:20,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:20:20,466 INFO L82 PathProgramCache]: Analyzing trace with hash 545990226, now seen corresponding path program 12 times [2021-06-06 00:20:20,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:20:20,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010353492] [2021-06-06 00:20:20,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:20:20,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:20:20,509 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:20,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:20:20,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010353492] [2021-06-06 00:20:20,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010353492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:20,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135868019] [2021-06-06 00:20:20,510 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:20:20,544 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:20:20,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:20:20,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:20:20,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:20:20,614 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:20,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135868019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:20,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:20:20,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-06 00:20:20,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833888743] [2021-06-06 00:20:20,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:20:20,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:20:20,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:20:20,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:20:20,616 INFO L87 Difference]: Start difference. First operand 433 states and 1390 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:20,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:20:20,875 INFO L93 Difference]: Finished difference Result 999 states and 2955 transitions. [2021-06-06 00:20:20,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-06 00:20:20,875 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:20:20,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:20:20,878 INFO L225 Difference]: With dead ends: 999 [2021-06-06 00:20:20,879 INFO L226 Difference]: Without dead ends: 995 [2021-06-06 00:20:20,879 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 162.4ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-06-06 00:20:20,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2021-06-06 00:20:20,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 472. [2021-06-06 00:20:20,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 471 states have (on average 3.2229299363057327) internal successors, (1518), 471 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:20,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 1518 transitions. [2021-06-06 00:20:20,892 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 1518 transitions. Word has length 26 [2021-06-06 00:20:20,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:20:20,892 INFO L482 AbstractCegarLoop]: Abstraction has 472 states and 1518 transitions. [2021-06-06 00:20:20,892 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:20,892 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 1518 transitions. [2021-06-06 00:20:20,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:20:20,893 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:20:20,893 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:20:21,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-06 00:20:21,109 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:20:21,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:20:21,109 INFO L82 PathProgramCache]: Analyzing trace with hash 816499918, now seen corresponding path program 13 times [2021-06-06 00:20:21,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:20:21,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172561783] [2021-06-06 00:20:21,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:20:21,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:20:21,151 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:21,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:20:21,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172561783] [2021-06-06 00:20:21,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172561783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:21,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025041441] [2021-06-06 00:20:21,152 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:20:21,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:20:21,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:20:21,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:20:21,258 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:21,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025041441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:21,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:20:21,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-06 00:20:21,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486361106] [2021-06-06 00:20:21,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:20:21,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:20:21,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:20:21,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:20:21,259 INFO L87 Difference]: Start difference. First operand 472 states and 1518 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:21,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:20:21,613 INFO L93 Difference]: Finished difference Result 1053 states and 3099 transitions. [2021-06-06 00:20:21,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-06 00:20:21,613 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:20:21,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:20:21,617 INFO L225 Difference]: With dead ends: 1053 [2021-06-06 00:20:21,617 INFO L226 Difference]: Without dead ends: 1053 [2021-06-06 00:20:21,618 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 222.3ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-06-06 00:20:21,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1053 states. [2021-06-06 00:20:21,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1053 to 464. [2021-06-06 00:20:21,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 3.2311015118790496) internal successors, (1496), 463 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:21,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1496 transitions. [2021-06-06 00:20:21,630 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1496 transitions. Word has length 26 [2021-06-06 00:20:21,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:20:21,630 INFO L482 AbstractCegarLoop]: Abstraction has 464 states and 1496 transitions. [2021-06-06 00:20:21,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:21,630 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1496 transitions. [2021-06-06 00:20:21,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:20:21,631 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:20:21,632 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:20:21,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-06 00:20:21,845 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:20:21,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:20:21,845 INFO L82 PathProgramCache]: Analyzing trace with hash -980752764, now seen corresponding path program 1 times [2021-06-06 00:20:21,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:20:21,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987931566] [2021-06-06 00:20:21,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:20:21,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:20:22,163 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:22,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:20:22,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987931566] [2021-06-06 00:20:22,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987931566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:22,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847775406] [2021-06-06 00:20:22,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:20:22,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:20:22,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-06 00:20:22,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:20:22,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-06-06 00:20:22,379 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:20:22,385 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:20:22,386 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:20:22,386 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:20 [2021-06-06 00:20:22,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:20:22,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-06-06 00:20:22,430 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:20:22,438 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:20:22,440 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-06 00:20:22,440 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:27 [2021-06-06 00:20:22,491 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:22,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847775406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:22,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:20:22,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-06 00:20:22,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001838970] [2021-06-06 00:20:22,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-06 00:20:22,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:20:22,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-06 00:20:22,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-06-06 00:20:22,492 INFO L87 Difference]: Start difference. First operand 464 states and 1496 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:22,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:20:22,974 INFO L93 Difference]: Finished difference Result 853 states and 2545 transitions. [2021-06-06 00:20:22,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-06 00:20:22,975 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:20:22,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:20:22,978 INFO L225 Difference]: With dead ends: 853 [2021-06-06 00:20:22,978 INFO L226 Difference]: Without dead ends: 766 [2021-06-06 00:20:22,979 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 637.4ms TimeCoverageRelationStatistics Valid=193, Invalid=799, Unknown=0, NotChecked=0, Total=992 [2021-06-06 00:20:22,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2021-06-06 00:20:22,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 490. [2021-06-06 00:20:22,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 3.216768916155419) internal successors, (1573), 489 states have internal predecessors, (1573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:22,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1573 transitions. [2021-06-06 00:20:22,992 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1573 transitions. Word has length 28 [2021-06-06 00:20:22,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:20:22,992 INFO L482 AbstractCegarLoop]: Abstraction has 490 states and 1573 transitions. [2021-06-06 00:20:22,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:22,992 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1573 transitions. [2021-06-06 00:20:22,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:20:22,993 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:20:22,993 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:20:23,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:20:23,209 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:20:23,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:20:23,209 INFO L82 PathProgramCache]: Analyzing trace with hash 735427332, now seen corresponding path program 2 times [2021-06-06 00:20:23,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:20:23,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805240504] [2021-06-06 00:20:23,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:20:23,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:20:23,602 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:23,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:20:23,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805240504] [2021-06-06 00:20:23,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805240504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:23,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152971992] [2021-06-06 00:20:23,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:20:23,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:20:23,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:20:23,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-06 00:20:23,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:20:23,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-06-06 00:20:23,744 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:20:23,752 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:20:23,753 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-06 00:20:23,753 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:25 [2021-06-06 00:20:23,845 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-06-06 00:20:23,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-06 00:20:23,846 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:20:23,855 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:20:23,857 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-06 00:20:23,857 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:29 [2021-06-06 00:20:23,961 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-06 00:20:23,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152971992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:23,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:20:23,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-06-06 00:20:23,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548969412] [2021-06-06 00:20:23,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:20:23,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:20:23,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:20:23,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:20:23,962 INFO L87 Difference]: Start difference. First operand 490 states and 1573 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:25,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:20:25,404 INFO L93 Difference]: Finished difference Result 1130 states and 3345 transitions. [2021-06-06 00:20:25,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-06 00:20:25,405 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:20:25,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:20:25,407 INFO L225 Difference]: With dead ends: 1130 [2021-06-06 00:20:25,407 INFO L226 Difference]: Without dead ends: 998 [2021-06-06 00:20:25,408 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 1455.3ms TimeCoverageRelationStatistics Valid=417, Invalid=2235, Unknown=0, NotChecked=0, Total=2652 [2021-06-06 00:20:25,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2021-06-06 00:20:25,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 537. [2021-06-06 00:20:25,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 536 states have (on average 3.1940298507462686) internal successors, (1712), 536 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:25,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 1712 transitions. [2021-06-06 00:20:25,421 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 1712 transitions. Word has length 28 [2021-06-06 00:20:25,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:20:25,421 INFO L482 AbstractCegarLoop]: Abstraction has 537 states and 1712 transitions. [2021-06-06 00:20:25,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:25,421 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 1712 transitions. [2021-06-06 00:20:25,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:20:25,422 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:20:25,422 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:20:25,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-06 00:20:25,637 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:20:25,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:20:25,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1417721472, now seen corresponding path program 14 times [2021-06-06 00:20:25,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:20:25,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942787559] [2021-06-06 00:20:25,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:20:25,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:20:26,027 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:26,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:20:26,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942787559] [2021-06-06 00:20:26,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942787559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:26,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734093746] [2021-06-06 00:20:26,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:20:26,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:20:26,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:20:26,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:20:26,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:20:26,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-06-06 00:20:26,179 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:20:26,185 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:20:26,187 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-06 00:20:26,187 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:22 [2021-06-06 00:20:26,230 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-06-06 00:20:26,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-06 00:20:26,231 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:20:26,240 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:20:26,244 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-06 00:20:26,245 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:34 [2021-06-06 00:20:26,340 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-06 00:20:26,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734093746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:26,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:20:26,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-06-06 00:20:26,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560980283] [2021-06-06 00:20:26,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-06 00:20:26,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:20:26,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-06 00:20:26,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-06 00:20:26,342 INFO L87 Difference]: Start difference. First operand 537 states and 1712 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:27,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:20:27,612 INFO L93 Difference]: Finished difference Result 1024 states and 3050 transitions. [2021-06-06 00:20:27,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-06 00:20:27,612 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:20:27,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:20:27,614 INFO L225 Difference]: With dead ends: 1024 [2021-06-06 00:20:27,614 INFO L226 Difference]: Without dead ends: 946 [2021-06-06 00:20:27,615 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 1222.3ms TimeCoverageRelationStatistics Valid=419, Invalid=1837, Unknown=0, NotChecked=0, Total=2256 [2021-06-06 00:20:27,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2021-06-06 00:20:27,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 637. [2021-06-06 00:20:27,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 636 states have (on average 3.10062893081761) internal successors, (1972), 636 states have internal predecessors, (1972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:27,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 1972 transitions. [2021-06-06 00:20:27,626 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 1972 transitions. Word has length 28 [2021-06-06 00:20:27,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:20:27,627 INFO L482 AbstractCegarLoop]: Abstraction has 637 states and 1972 transitions. [2021-06-06 00:20:27,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:27,627 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 1972 transitions. [2021-06-06 00:20:27,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:20:27,628 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:20:27,628 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:20:27,845 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-06 00:20:27,845 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:20:27,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:20:27,846 INFO L82 PathProgramCache]: Analyzing trace with hash 916230348, now seen corresponding path program 3 times [2021-06-06 00:20:27,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:20:27,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525805156] [2021-06-06 00:20:27,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:20:27,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:20:28,188 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:28,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:20:28,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525805156] [2021-06-06 00:20:28,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525805156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:28,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134467624] [2021-06-06 00:20:28,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:20:28,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-06 00:20:28,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:20:28,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:20:28,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:20:28,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-06-06 00:20:28,296 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:20:28,305 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:20:28,307 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-06 00:20:28,307 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:25 [2021-06-06 00:20:28,356 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-06-06 00:20:28,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-06 00:20:28,358 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:20:28,368 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:20:28,371 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-06 00:20:28,371 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:37 [2021-06-06 00:20:28,528 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-06 00:20:28,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134467624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:28,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:20:28,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-06-06 00:20:28,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562378585] [2021-06-06 00:20:28,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:20:28,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:20:28,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:20:28,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:20:28,531 INFO L87 Difference]: Start difference. First operand 637 states and 1972 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:31,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:20:31,092 INFO L93 Difference]: Finished difference Result 1838 states and 5313 transitions. [2021-06-06 00:20:31,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-06 00:20:31,092 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:20:31,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:20:31,096 INFO L225 Difference]: With dead ends: 1838 [2021-06-06 00:20:31,096 INFO L226 Difference]: Without dead ends: 1655 [2021-06-06 00:20:31,097 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 2020.0ms TimeCoverageRelationStatistics Valid=569, Invalid=3091, Unknown=0, NotChecked=0, Total=3660 [2021-06-06 00:20:31,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1655 states. [2021-06-06 00:20:31,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1655 to 692. [2021-06-06 00:20:31,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 691 states have (on average 3.1577424023154848) internal successors, (2182), 691 states have internal predecessors, (2182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:31,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 2182 transitions. [2021-06-06 00:20:31,115 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 2182 transitions. Word has length 28 [2021-06-06 00:20:31,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:20:31,115 INFO L482 AbstractCegarLoop]: Abstraction has 692 states and 2182 transitions. [2021-06-06 00:20:31,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:31,115 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 2182 transitions. [2021-06-06 00:20:31,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:20:31,117 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:20:31,117 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:20:31,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:20:31,340 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:20:31,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:20:31,341 INFO L82 PathProgramCache]: Analyzing trace with hash 937707268, now seen corresponding path program 15 times [2021-06-06 00:20:31,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:20:31,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740965112] [2021-06-06 00:20:31,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:20:31,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:20:31,653 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:31,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:20:31,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740965112] [2021-06-06 00:20:31,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740965112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:31,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117535415] [2021-06-06 00:20:31,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:20:31,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:20:31,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:20:31,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:20:31,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:20:31,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-06-06 00:20:31,771 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:20:31,779 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:20:31,781 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-06 00:20:31,781 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:25 [2021-06-06 00:20:31,871 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-06-06 00:20:31,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-06 00:20:31,872 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:20:31,882 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:20:31,886 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-06 00:20:31,886 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:34 [2021-06-06 00:20:31,987 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-06 00:20:31,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117535415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:31,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:20:31,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-06-06 00:20:31,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962126355] [2021-06-06 00:20:31,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-06 00:20:31,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:20:31,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-06 00:20:31,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-06-06 00:20:31,989 INFO L87 Difference]: Start difference. First operand 692 states and 2182 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:33,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:20:33,258 INFO L93 Difference]: Finished difference Result 1136 states and 3439 transitions. [2021-06-06 00:20:33,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-06 00:20:33,259 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:20:33,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:20:33,260 INFO L225 Difference]: With dead ends: 1136 [2021-06-06 00:20:33,261 INFO L226 Difference]: Without dead ends: 1058 [2021-06-06 00:20:33,261 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 1222.4ms TimeCoverageRelationStatistics Valid=406, Invalid=2044, Unknown=0, NotChecked=0, Total=2450 [2021-06-06 00:20:33,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1058 states. [2021-06-06 00:20:33,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1058 to 680. [2021-06-06 00:20:33,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 680 states, 679 states have (on average 3.1723122238586154) internal successors, (2154), 679 states have internal predecessors, (2154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:33,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 2154 transitions. [2021-06-06 00:20:33,273 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 2154 transitions. Word has length 28 [2021-06-06 00:20:33,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:20:33,273 INFO L482 AbstractCegarLoop]: Abstraction has 680 states and 2154 transitions. [2021-06-06 00:20:33,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:33,273 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 2154 transitions. [2021-06-06 00:20:33,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:20:33,275 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:20:33,275 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:20:33,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:20:33,498 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:20:33,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:20:33,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1490293068, now seen corresponding path program 16 times [2021-06-06 00:20:33,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:20:33,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908080957] [2021-06-06 00:20:33,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:20:33,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:20:33,849 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:33,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:20:33,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908080957] [2021-06-06 00:20:33,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908080957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:33,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800544121] [2021-06-06 00:20:33,849 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:20:33,874 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:20:33,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:20:33,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-06 00:20:33,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:20:34,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-06 00:20:34,052 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:20:34,061 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:20:34,061 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:20:34,062 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:24 [2021-06-06 00:20:34,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:20:34,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-06-06 00:20:34,130 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:20:34,139 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:20:34,141 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-06 00:20:34,141 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:31 [2021-06-06 00:20:34,215 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:34,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800544121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:34,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:20:34,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 24 [2021-06-06 00:20:34,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111137957] [2021-06-06 00:20:34,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-06 00:20:34,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:20:34,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-06 00:20:34,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-06-06 00:20:34,218 INFO L87 Difference]: Start difference. First operand 680 states and 2154 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:36,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:20:36,319 INFO L93 Difference]: Finished difference Result 1629 states and 4937 transitions. [2021-06-06 00:20:36,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-06 00:20:36,319 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:20:36,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:20:36,322 INFO L225 Difference]: With dead ends: 1629 [2021-06-06 00:20:36,323 INFO L226 Difference]: Without dead ends: 1293 [2021-06-06 00:20:36,324 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1282 ImplicationChecksByTransitivity, 1991.6ms TimeCoverageRelationStatistics Valid=735, Invalid=3425, Unknown=0, NotChecked=0, Total=4160 [2021-06-06 00:20:36,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1293 states. [2021-06-06 00:20:36,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1293 to 920. [2021-06-06 00:20:36,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 920 states, 919 states have (on average 3.263329706202394) internal successors, (2999), 919 states have internal predecessors, (2999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:36,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 920 states to 920 states and 2999 transitions. [2021-06-06 00:20:36,345 INFO L78 Accepts]: Start accepts. Automaton has 920 states and 2999 transitions. Word has length 28 [2021-06-06 00:20:36,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:20:36,345 INFO L482 AbstractCegarLoop]: Abstraction has 920 states and 2999 transitions. [2021-06-06 00:20:36,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:36,345 INFO L276 IsEmpty]: Start isEmpty. Operand 920 states and 2999 transitions. [2021-06-06 00:20:36,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:20:36,347 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:20:36,347 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:20:36,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:20:36,561 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:20:36,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:20:36,561 INFO L82 PathProgramCache]: Analyzing trace with hash -836691140, now seen corresponding path program 4 times [2021-06-06 00:20:36,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:20:36,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699932496] [2021-06-06 00:20:36,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:20:36,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:20:36,966 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:36,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:20:36,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699932496] [2021-06-06 00:20:36,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699932496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:36,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350220520] [2021-06-06 00:20:36,967 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:20:37,001 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:20:37,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:20:37,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-06 00:20:37,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:20:37,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-06-06 00:20:37,095 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:20:37,101 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:20:37,101 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:20:37,102 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:20 [2021-06-06 00:20:37,166 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-06-06 00:20:37,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-06 00:20:37,167 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:20:37,175 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:20:37,176 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-06 00:20:37,176 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:29 [2021-06-06 00:20:37,268 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:20:37,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350220520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:37,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:20:37,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-06-06 00:20:37,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079149774] [2021-06-06 00:20:37,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:20:37,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:20:37,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:20:37,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:20:37,270 INFO L87 Difference]: Start difference. First operand 920 states and 2999 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:38,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:20:38,560 INFO L93 Difference]: Finished difference Result 1908 states and 5865 transitions. [2021-06-06 00:20:38,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-06 00:20:38,560 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:20:38,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:20:38,563 INFO L225 Difference]: With dead ends: 1908 [2021-06-06 00:20:38,563 INFO L226 Difference]: Without dead ends: 1792 [2021-06-06 00:20:38,564 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 1394.1ms TimeCoverageRelationStatistics Valid=320, Invalid=1402, Unknown=0, NotChecked=0, Total=1722 [2021-06-06 00:20:38,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1792 states. [2021-06-06 00:20:38,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1792 to 1049. [2021-06-06 00:20:38,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1049 states, 1048 states have (on average 3.25381679389313) internal successors, (3410), 1048 states have internal predecessors, (3410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:38,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1049 states to 1049 states and 3410 transitions. [2021-06-06 00:20:38,588 INFO L78 Accepts]: Start accepts. Automaton has 1049 states and 3410 transitions. Word has length 28 [2021-06-06 00:20:38,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:20:38,588 INFO L482 AbstractCegarLoop]: Abstraction has 1049 states and 3410 transitions. [2021-06-06 00:20:38,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:38,588 INFO L276 IsEmpty]: Start isEmpty. Operand 1049 states and 3410 transitions. [2021-06-06 00:20:38,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:20:38,590 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:20:38,591 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:20:38,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-06 00:20:38,805 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:20:38,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:20:38,805 INFO L82 PathProgramCache]: Analyzing trace with hash -556203584, now seen corresponding path program 5 times [2021-06-06 00:20:38,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:20:38,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038668935] [2021-06-06 00:20:38,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:20:38,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:20:39,057 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:39,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:20:39,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038668935] [2021-06-06 00:20:39,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038668935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:39,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932738667] [2021-06-06 00:20:39,058 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:20:39,081 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:20:39,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:20:39,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-06 00:20:39,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:20:39,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-06-06 00:20:39,161 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:20:39,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:20:39,166 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:20:39,166 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:17 [2021-06-06 00:20:39,227 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-06-06 00:20:39,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-06 00:20:39,228 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:20:39,241 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:20:39,242 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-06 00:20:39,242 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:32 [2021-06-06 00:20:39,385 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:39,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932738667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:39,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:20:39,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-06 00:20:39,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033813829] [2021-06-06 00:20:39,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:20:39,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:20:39,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:20:39,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:20:39,387 INFO L87 Difference]: Start difference. First operand 1049 states and 3410 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:41,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:20:41,487 INFO L93 Difference]: Finished difference Result 1982 states and 6072 transitions. [2021-06-06 00:20:41,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-06 00:20:41,487 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:20:41,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:20:41,490 INFO L225 Difference]: With dead ends: 1982 [2021-06-06 00:20:41,491 INFO L226 Difference]: Without dead ends: 1756 [2021-06-06 00:20:41,491 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 1835.0ms TimeCoverageRelationStatistics Valid=554, Invalid=2416, Unknown=0, NotChecked=0, Total=2970 [2021-06-06 00:20:41,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1756 states. [2021-06-06 00:20:41,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1756 to 1070. [2021-06-06 00:20:41,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1070 states, 1069 states have (on average 3.2198316183348923) internal successors, (3442), 1069 states have internal predecessors, (3442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:41,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1070 states to 1070 states and 3442 transitions. [2021-06-06 00:20:41,515 INFO L78 Accepts]: Start accepts. Automaton has 1070 states and 3442 transitions. Word has length 28 [2021-06-06 00:20:41,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:20:41,515 INFO L482 AbstractCegarLoop]: Abstraction has 1070 states and 3442 transitions. [2021-06-06 00:20:41,515 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:41,515 INFO L276 IsEmpty]: Start isEmpty. Operand 1070 states and 3442 transitions. [2021-06-06 00:20:41,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:20:41,518 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:20:41,518 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:20:41,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-06 00:20:41,740 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:20:41,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:20:41,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1520630964, now seen corresponding path program 6 times [2021-06-06 00:20:41,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:20:41,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384949536] [2021-06-06 00:20:41,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:20:41,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:20:42,124 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:42,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:20:42,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384949536] [2021-06-06 00:20:42,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384949536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:42,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167912887] [2021-06-06 00:20:42,124 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:20:42,148 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:20:42,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:20:42,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-06 00:20:42,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:20:42,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-06-06 00:20:42,246 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:20:42,257 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:20:42,258 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:20:42,258 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:23 [2021-06-06 00:20:42,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:20:42,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-06-06 00:20:42,290 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:20:42,300 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:20:42,302 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-06 00:20:42,302 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:30 [2021-06-06 00:20:42,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:20:42,377 INFO L354 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2021-06-06 00:20:42,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2021-06-06 00:20:42,379 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:20:42,392 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:20:42,394 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-06 00:20:42,395 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:42 [2021-06-06 00:20:42,559 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:42,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167912887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:42,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:20:42,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2021-06-06 00:20:42,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298107046] [2021-06-06 00:20:42,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-06 00:20:42,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:20:42,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-06 00:20:42,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:20:42,560 INFO L87 Difference]: Start difference. First operand 1070 states and 3442 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:44,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:20:44,137 INFO L93 Difference]: Finished difference Result 2007 states and 6151 transitions. [2021-06-06 00:20:44,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-06 00:20:44,137 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:20:44,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:20:44,142 INFO L225 Difference]: With dead ends: 2007 [2021-06-06 00:20:44,143 INFO L226 Difference]: Without dead ends: 1842 [2021-06-06 00:20:44,143 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 1479.6ms TimeCoverageRelationStatistics Valid=307, Invalid=2045, Unknown=0, NotChecked=0, Total=2352 [2021-06-06 00:20:44,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1842 states. [2021-06-06 00:20:44,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1842 to 1157. [2021-06-06 00:20:44,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1157 states, 1156 states have (on average 3.222318339100346) internal successors, (3725), 1156 states have internal predecessors, (3725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:44,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1157 states to 1157 states and 3725 transitions. [2021-06-06 00:20:44,170 INFO L78 Accepts]: Start accepts. Automaton has 1157 states and 3725 transitions. Word has length 28 [2021-06-06 00:20:44,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:20:44,170 INFO L482 AbstractCegarLoop]: Abstraction has 1157 states and 3725 transitions. [2021-06-06 00:20:44,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:44,171 INFO L276 IsEmpty]: Start isEmpty. Operand 1157 states and 3725 transitions. [2021-06-06 00:20:44,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:20:44,173 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:20:44,173 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:20:44,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:20:44,389 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:20:44,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:20:44,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1530790852, now seen corresponding path program 7 times [2021-06-06 00:20:44,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:20:44,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112816568] [2021-06-06 00:20:44,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:20:44,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:20:44,735 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:44,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:20:44,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112816568] [2021-06-06 00:20:44,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112816568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:44,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770903810] [2021-06-06 00:20:44,736 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:20:44,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:20:44,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-06 00:20:44,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:20:44,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-06-06 00:20:44,876 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:20:44,883 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:20:44,883 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:20:44,884 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-06 00:20:44,916 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-06-06 00:20:44,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-06 00:20:44,917 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:20:44,927 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:20:44,929 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-06 00:20:44,929 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:37 [2021-06-06 00:20:44,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:20:44,980 INFO L354 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2021-06-06 00:20:44,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2021-06-06 00:20:44,982 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:20:44,993 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:20:44,995 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-06 00:20:44,995 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:45, output treesize:44 [2021-06-06 00:20:45,147 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:45,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770903810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:45,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:20:45,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-06 00:20:45,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371156686] [2021-06-06 00:20:45,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-06 00:20:45,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:20:45,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-06 00:20:45,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-06-06 00:20:45,148 INFO L87 Difference]: Start difference. First operand 1157 states and 3725 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:45,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:20:45,952 INFO L93 Difference]: Finished difference Result 2244 states and 7072 transitions. [2021-06-06 00:20:45,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-06 00:20:45,953 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:20:45,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:20:45,960 INFO L225 Difference]: With dead ends: 2244 [2021-06-06 00:20:45,960 INFO L226 Difference]: Without dead ends: 1887 [2021-06-06 00:20:45,961 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 839.3ms TimeCoverageRelationStatistics Valid=247, Invalid=1085, Unknown=0, NotChecked=0, Total=1332 [2021-06-06 00:20:45,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1887 states. [2021-06-06 00:20:45,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1887 to 1173. [2021-06-06 00:20:45,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1173 states, 1172 states have (on average 3.2380546075085324) internal successors, (3795), 1172 states have internal predecessors, (3795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:45,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1173 states to 1173 states and 3795 transitions. [2021-06-06 00:20:45,993 INFO L78 Accepts]: Start accepts. Automaton has 1173 states and 3795 transitions. Word has length 28 [2021-06-06 00:20:45,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:20:45,993 INFO L482 AbstractCegarLoop]: Abstraction has 1173 states and 3795 transitions. [2021-06-06 00:20:45,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:45,994 INFO L276 IsEmpty]: Start isEmpty. Operand 1173 states and 3795 transitions. [2021-06-06 00:20:45,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:20:45,996 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:20:45,996 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:20:46,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-06 00:20:46,219 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:20:46,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:20:46,219 INFO L82 PathProgramCache]: Analyzing trace with hash 55569732, now seen corresponding path program 8 times [2021-06-06 00:20:46,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:20:46,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348334642] [2021-06-06 00:20:46,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:20:46,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:20:46,709 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:46,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:20:46,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348334642] [2021-06-06 00:20:46,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348334642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:46,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584837600] [2021-06-06 00:20:46,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:20:46,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:20:46,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:20:46,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:20:46,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:20:46,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-06-06 00:20:46,831 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:20:46,845 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:20:46,846 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:20:46,846 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:17 [2021-06-06 00:20:46,878 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-06-06 00:20:46,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-06 00:20:46,879 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:20:46,886 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:20:46,889 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-06 00:20:46,889 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:29 [2021-06-06 00:20:47,019 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:47,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584837600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:47,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:20:47,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2021-06-06 00:20:47,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544928705] [2021-06-06 00:20:47,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:20:47,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:20:47,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:20:47,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:20:47,022 INFO L87 Difference]: Start difference. First operand 1173 states and 3795 transitions. Second operand has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:47,389 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 36 [2021-06-06 00:20:47,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:20:47,752 INFO L93 Difference]: Finished difference Result 2027 states and 6489 transitions. [2021-06-06 00:20:47,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-06 00:20:47,752 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:20:47,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:20:47,755 INFO L225 Difference]: With dead ends: 2027 [2021-06-06 00:20:47,755 INFO L226 Difference]: Without dead ends: 1705 [2021-06-06 00:20:47,755 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 937.2ms TimeCoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2021-06-06 00:20:47,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1705 states. [2021-06-06 00:20:47,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1705 to 1135. [2021-06-06 00:20:47,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1135 states, 1134 states have (on average 3.236331569664903) internal successors, (3670), 1134 states have internal predecessors, (3670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:47,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1135 states to 1135 states and 3670 transitions. [2021-06-06 00:20:47,773 INFO L78 Accepts]: Start accepts. Automaton has 1135 states and 3670 transitions. Word has length 28 [2021-06-06 00:20:47,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:20:47,774 INFO L482 AbstractCegarLoop]: Abstraction has 1135 states and 3670 transitions. [2021-06-06 00:20:47,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:47,774 INFO L276 IsEmpty]: Start isEmpty. Operand 1135 states and 3670 transitions. [2021-06-06 00:20:47,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:20:47,776 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:20:47,776 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:20:47,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:20:47,976 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:20:47,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:20:47,977 INFO L82 PathProgramCache]: Analyzing trace with hash 915430826, now seen corresponding path program 9 times [2021-06-06 00:20:47,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:20:47,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358244893] [2021-06-06 00:20:47,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:20:47,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:20:48,025 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:48,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:20:48,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358244893] [2021-06-06 00:20:48,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358244893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:48,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357752407] [2021-06-06 00:20:48,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:20:48,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-06 00:20:48,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:20:48,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:20:48,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:20:48,177 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:20:48,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357752407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:48,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:20:48,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-06 00:20:48,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778719554] [2021-06-06 00:20:48,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:20:48,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:20:48,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:20:48,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:20:48,178 INFO L87 Difference]: Start difference. First operand 1135 states and 3670 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:49,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:20:49,500 INFO L93 Difference]: Finished difference Result 5166 states and 15294 transitions. [2021-06-06 00:20:49,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-06 00:20:49,501 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:20:49,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:20:49,507 INFO L225 Difference]: With dead ends: 5166 [2021-06-06 00:20:49,507 INFO L226 Difference]: Without dead ends: 5166 [2021-06-06 00:20:49,509 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2985 ImplicationChecksByTransitivity, 901.6ms TimeCoverageRelationStatistics Valid=1515, Invalid=6141, Unknown=0, NotChecked=0, Total=7656 [2021-06-06 00:20:49,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5166 states. [2021-06-06 00:20:49,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5166 to 1295. [2021-06-06 00:20:49,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1295 states, 1294 states have (on average 3.3377125193199384) internal successors, (4319), 1294 states have internal predecessors, (4319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:49,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1295 states to 1295 states and 4319 transitions. [2021-06-06 00:20:49,554 INFO L78 Accepts]: Start accepts. Automaton has 1295 states and 4319 transitions. Word has length 30 [2021-06-06 00:20:49,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:20:49,554 INFO L482 AbstractCegarLoop]: Abstraction has 1295 states and 4319 transitions. [2021-06-06 00:20:49,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:49,554 INFO L276 IsEmpty]: Start isEmpty. Operand 1295 states and 4319 transitions. [2021-06-06 00:20:49,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:20:49,556 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:20:49,556 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:20:49,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-06 00:20:49,761 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:20:49,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:20:49,761 INFO L82 PathProgramCache]: Analyzing trace with hash 930891622, now seen corresponding path program 10 times [2021-06-06 00:20:49,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:20:49,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246222256] [2021-06-06 00:20:49,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:20:49,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:20:49,810 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:49,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:20:49,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246222256] [2021-06-06 00:20:49,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246222256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:49,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698626133] [2021-06-06 00:20:49,811 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:20:49,868 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:20:49,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:20:49,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:20:49,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:20:49,977 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:20:49,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698626133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:49,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:20:49,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-06 00:20:49,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121154999] [2021-06-06 00:20:49,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:20:49,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:20:49,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:20:49,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:20:49,979 INFO L87 Difference]: Start difference. First operand 1295 states and 4319 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:51,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:20:51,369 INFO L93 Difference]: Finished difference Result 5273 states and 15409 transitions. [2021-06-06 00:20:51,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-06 00:20:51,370 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:20:51,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:20:51,377 INFO L225 Difference]: With dead ends: 5273 [2021-06-06 00:20:51,377 INFO L226 Difference]: Without dead ends: 5273 [2021-06-06 00:20:51,379 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3083 ImplicationChecksByTransitivity, 919.8ms TimeCoverageRelationStatistics Valid=1548, Invalid=6284, Unknown=0, NotChecked=0, Total=7832 [2021-06-06 00:20:51,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5273 states. [2021-06-06 00:20:51,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5273 to 1261. [2021-06-06 00:20:51,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1261 states, 1260 states have (on average 3.3119047619047617) internal successors, (4173), 1260 states have internal predecessors, (4173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:51,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1261 states to 1261 states and 4173 transitions. [2021-06-06 00:20:51,419 INFO L78 Accepts]: Start accepts. Automaton has 1261 states and 4173 transitions. Word has length 30 [2021-06-06 00:20:51,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:20:51,419 INFO L482 AbstractCegarLoop]: Abstraction has 1261 states and 4173 transitions. [2021-06-06 00:20:51,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:51,420 INFO L276 IsEmpty]: Start isEmpty. Operand 1261 states and 4173 transitions. [2021-06-06 00:20:51,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:20:51,422 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:20:51,422 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:20:51,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-06 00:20:51,629 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:20:51,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:20:51,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1624165858, now seen corresponding path program 11 times [2021-06-06 00:20:51,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:20:51,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233152974] [2021-06-06 00:20:51,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:20:51,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:20:51,671 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:51,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:20:51,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233152974] [2021-06-06 00:20:51,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233152974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:51,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448626249] [2021-06-06 00:20:51,671 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:20:51,696 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-06 00:20:51,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:20:51,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:20:51,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:20:51,802 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:20:51,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448626249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:51,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:20:51,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-06 00:20:51,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162859914] [2021-06-06 00:20:51,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:20:51,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:20:51,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:20:51,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:20:51,803 INFO L87 Difference]: Start difference. First operand 1261 states and 4173 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:52,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:20:52,586 INFO L93 Difference]: Finished difference Result 3862 states and 11266 transitions. [2021-06-06 00:20:52,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-06 00:20:52,586 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:20:52,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:20:52,592 INFO L225 Difference]: With dead ends: 3862 [2021-06-06 00:20:52,592 INFO L226 Difference]: Without dead ends: 3862 [2021-06-06 00:20:52,593 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1240 ImplicationChecksByTransitivity, 491.2ms TimeCoverageRelationStatistics Valid=747, Invalid=2793, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:20:52,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3862 states. [2021-06-06 00:20:52,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3862 to 1267. [2021-06-06 00:20:52,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1267 states, 1266 states have (on average 3.3143759873617693) internal successors, (4196), 1266 states have internal predecessors, (4196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:52,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1267 states to 1267 states and 4196 transitions. [2021-06-06 00:20:52,625 INFO L78 Accepts]: Start accepts. Automaton has 1267 states and 4196 transitions. Word has length 30 [2021-06-06 00:20:52,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:20:52,625 INFO L482 AbstractCegarLoop]: Abstraction has 1267 states and 4196 transitions. [2021-06-06 00:20:52,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:52,626 INFO L276 IsEmpty]: Start isEmpty. Operand 1267 states and 4196 transitions. [2021-06-06 00:20:52,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:20:52,628 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:20:52,628 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:20:52,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-06 00:20:52,833 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:20:52,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:20:52,833 INFO L82 PathProgramCache]: Analyzing trace with hash 568788464, now seen corresponding path program 12 times [2021-06-06 00:20:52,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:20:52,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900286837] [2021-06-06 00:20:52,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:20:52,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:20:52,883 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:52,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:20:52,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900286837] [2021-06-06 00:20:52,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900286837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:52,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456023458] [2021-06-06 00:20:52,884 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:20:52,907 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:20:52,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:20:52,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:20:52,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:20:53,016 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:20:53,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456023458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:53,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:20:53,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-06 00:20:53,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381213941] [2021-06-06 00:20:53,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:20:53,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:20:53,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:20:53,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:20:53,017 INFO L87 Difference]: Start difference. First operand 1267 states and 4196 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:53,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:20:53,745 INFO L93 Difference]: Finished difference Result 3689 states and 10863 transitions. [2021-06-06 00:20:53,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-06 00:20:53,746 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:20:53,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:20:53,750 INFO L225 Difference]: With dead ends: 3689 [2021-06-06 00:20:53,750 INFO L226 Difference]: Without dead ends: 3673 [2021-06-06 00:20:53,751 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 466.7ms TimeCoverageRelationStatistics Valid=710, Invalid=2482, Unknown=0, NotChecked=0, Total=3192 [2021-06-06 00:20:53,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3673 states. [2021-06-06 00:20:53,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3673 to 1255. [2021-06-06 00:20:53,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1255 states, 1254 states have (on average 3.3038277511961724) internal successors, (4143), 1254 states have internal predecessors, (4143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:53,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1255 states to 1255 states and 4143 transitions. [2021-06-06 00:20:53,778 INFO L78 Accepts]: Start accepts. Automaton has 1255 states and 4143 transitions. Word has length 30 [2021-06-06 00:20:53,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:20:53,778 INFO L482 AbstractCegarLoop]: Abstraction has 1255 states and 4143 transitions. [2021-06-06 00:20:53,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:53,778 INFO L276 IsEmpty]: Start isEmpty. Operand 1255 states and 4143 transitions. [2021-06-06 00:20:53,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:20:53,779 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:20:53,779 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:20:53,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:20:53,980 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:20:53,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:20:53,980 INFO L82 PathProgramCache]: Analyzing trace with hash -707538508, now seen corresponding path program 13 times [2021-06-06 00:20:53,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:20:53,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18767929] [2021-06-06 00:20:53,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:20:53,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:20:54,020 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:54,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:20:54,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18767929] [2021-06-06 00:20:54,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18767929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:54,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24412789] [2021-06-06 00:20:54,020 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:20:54,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:20:54,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:20:54,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:20:54,154 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:20:54,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24412789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:54,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:20:54,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-06 00:20:54,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682320307] [2021-06-06 00:20:54,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:20:54,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:20:54,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:20:54,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:20:54,156 INFO L87 Difference]: Start difference. First operand 1255 states and 4143 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:54,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:20:54,872 INFO L93 Difference]: Finished difference Result 4077 states and 11802 transitions. [2021-06-06 00:20:54,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-06 00:20:54,872 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:20:54,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:20:54,877 INFO L225 Difference]: With dead ends: 4077 [2021-06-06 00:20:54,877 INFO L226 Difference]: Without dead ends: 4053 [2021-06-06 00:20:54,877 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1051 ImplicationChecksByTransitivity, 445.6ms TimeCoverageRelationStatistics Valid=680, Invalid=2400, Unknown=0, NotChecked=0, Total=3080 [2021-06-06 00:20:54,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4053 states. [2021-06-06 00:20:54,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4053 to 1269. [2021-06-06 00:20:54,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1269 states, 1268 states have (on average 3.2981072555205047) internal successors, (4182), 1268 states have internal predecessors, (4182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:54,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1269 states to 1269 states and 4182 transitions. [2021-06-06 00:20:54,907 INFO L78 Accepts]: Start accepts. Automaton has 1269 states and 4182 transitions. Word has length 30 [2021-06-06 00:20:54,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:20:54,907 INFO L482 AbstractCegarLoop]: Abstraction has 1269 states and 4182 transitions. [2021-06-06 00:20:54,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:54,907 INFO L276 IsEmpty]: Start isEmpty. Operand 1269 states and 4182 transitions. [2021-06-06 00:20:54,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:20:54,909 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:20:54,909 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:20:55,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-06 00:20:55,113 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:20:55,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:20:55,114 INFO L82 PathProgramCache]: Analyzing trace with hash -437028816, now seen corresponding path program 14 times [2021-06-06 00:20:55,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:20:55,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199009134] [2021-06-06 00:20:55,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:20:55,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:20:55,160 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:55,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:20:55,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199009134] [2021-06-06 00:20:55,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199009134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:55,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406548826] [2021-06-06 00:20:55,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:20:55,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:20:55,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:20:55,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:20:55,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:20:55,287 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:20:55,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406548826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:55,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:20:55,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-06 00:20:55,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337421362] [2021-06-06 00:20:55,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:20:55,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:20:55,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:20:55,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:20:55,288 INFO L87 Difference]: Start difference. First operand 1269 states and 4182 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:56,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:20:56,086 INFO L93 Difference]: Finished difference Result 4229 states and 12165 transitions. [2021-06-06 00:20:56,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-06 00:20:56,087 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:20:56,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:20:56,092 INFO L225 Difference]: With dead ends: 4229 [2021-06-06 00:20:56,092 INFO L226 Difference]: Without dead ends: 4229 [2021-06-06 00:20:56,092 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1262 ImplicationChecksByTransitivity, 478.9ms TimeCoverageRelationStatistics Valid=757, Invalid=2783, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:20:56,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4229 states. [2021-06-06 00:20:56,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4229 to 1092. [2021-06-06 00:20:56,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1092 states, 1091 states have (on average 3.1631530705774518) internal successors, (3451), 1091 states have internal predecessors, (3451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:56,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1092 states to 1092 states and 3451 transitions. [2021-06-06 00:20:56,129 INFO L78 Accepts]: Start accepts. Automaton has 1092 states and 3451 transitions. Word has length 30 [2021-06-06 00:20:56,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:20:56,129 INFO L482 AbstractCegarLoop]: Abstraction has 1092 states and 3451 transitions. [2021-06-06 00:20:56,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:56,129 INFO L276 IsEmpty]: Start isEmpty. Operand 1092 states and 3451 transitions. [2021-06-06 00:20:56,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:20:56,131 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:20:56,131 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:20:56,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:20:56,345 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:20:56,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:20:56,345 INFO L82 PathProgramCache]: Analyzing trace with hash 333072554, now seen corresponding path program 15 times [2021-06-06 00:20:56,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:20:56,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761455137] [2021-06-06 00:20:56,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:20:56,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:20:56,389 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:56,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:20:56,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761455137] [2021-06-06 00:20:56,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761455137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:56,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112278878] [2021-06-06 00:20:56,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:20:56,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-06 00:20:56,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:20:56,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:20:56,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:20:56,507 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:20:56,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112278878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:56,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:20:56,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-06 00:20:56,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095522071] [2021-06-06 00:20:56,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:20:56,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:20:56,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:20:56,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:20:56,508 INFO L87 Difference]: Start difference. First operand 1092 states and 3451 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:57,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:20:57,374 INFO L93 Difference]: Finished difference Result 3880 states and 11526 transitions. [2021-06-06 00:20:57,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-06 00:20:57,374 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:20:57,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:20:57,378 INFO L225 Difference]: With dead ends: 3880 [2021-06-06 00:20:57,379 INFO L226 Difference]: Without dead ends: 3880 [2021-06-06 00:20:57,379 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1384 ImplicationChecksByTransitivity, 588.9ms TimeCoverageRelationStatistics Valid=788, Invalid=3244, Unknown=0, NotChecked=0, Total=4032 [2021-06-06 00:20:57,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3880 states. [2021-06-06 00:20:57,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3880 to 1361. [2021-06-06 00:20:57,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1361 states, 1360 states have (on average 3.2536764705882355) internal successors, (4425), 1360 states have internal predecessors, (4425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:57,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1361 states to 1361 states and 4425 transitions. [2021-06-06 00:20:57,417 INFO L78 Accepts]: Start accepts. Automaton has 1361 states and 4425 transitions. Word has length 30 [2021-06-06 00:20:57,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:20:57,417 INFO L482 AbstractCegarLoop]: Abstraction has 1361 states and 4425 transitions. [2021-06-06 00:20:57,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:57,417 INFO L276 IsEmpty]: Start isEmpty. Operand 1361 states and 4425 transitions. [2021-06-06 00:20:57,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:20:57,419 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:20:57,420 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:20:57,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-06 00:20:57,633 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:20:57,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:20:57,633 INFO L82 PathProgramCache]: Analyzing trace with hash -722304840, now seen corresponding path program 16 times [2021-06-06 00:20:57,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:20:57,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350078095] [2021-06-06 00:20:57,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:20:57,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:20:57,669 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:57,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:20:57,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350078095] [2021-06-06 00:20:57,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350078095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:57,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819581446] [2021-06-06 00:20:57,670 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:20:57,692 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:20:57,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:20:57,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:20:57,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:20:57,783 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:20:57,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819581446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:57,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:20:57,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-06 00:20:57,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239197243] [2021-06-06 00:20:57,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:20:57,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:20:57,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:20:57,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:20:57,784 INFO L87 Difference]: Start difference. First operand 1361 states and 4425 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:58,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:20:58,525 INFO L93 Difference]: Finished difference Result 3700 states and 11089 transitions. [2021-06-06 00:20:58,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-06 00:20:58,525 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:20:58,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:20:58,530 INFO L225 Difference]: With dead ends: 3700 [2021-06-06 00:20:58,530 INFO L226 Difference]: Without dead ends: 3684 [2021-06-06 00:20:58,531 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 486.5ms TimeCoverageRelationStatistics Valid=675, Invalid=2517, Unknown=0, NotChecked=0, Total=3192 [2021-06-06 00:20:58,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3684 states. [2021-06-06 00:20:58,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3684 to 1355. [2021-06-06 00:20:58,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1355 states, 1354 states have (on average 3.2511078286558344) internal successors, (4402), 1354 states have internal predecessors, (4402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:58,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1355 states to 1355 states and 4402 transitions. [2021-06-06 00:20:58,569 INFO L78 Accepts]: Start accepts. Automaton has 1355 states and 4402 transitions. Word has length 30 [2021-06-06 00:20:58,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:20:58,569 INFO L482 AbstractCegarLoop]: Abstraction has 1355 states and 4402 transitions. [2021-06-06 00:20:58,570 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:58,570 INFO L276 IsEmpty]: Start isEmpty. Operand 1355 states and 4402 transitions. [2021-06-06 00:20:58,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:20:58,572 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:20:58,572 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:20:58,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-06 00:20:58,789 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:20:58,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:20:58,789 INFO L82 PathProgramCache]: Analyzing trace with hash 760830098, now seen corresponding path program 17 times [2021-06-06 00:20:58,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:20:58,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160621799] [2021-06-06 00:20:58,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:20:58,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:20:58,829 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:58,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:20:58,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160621799] [2021-06-06 00:20:58,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160621799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:58,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426503246] [2021-06-06 00:20:58,830 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:20:58,860 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:20:58,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:20:58,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:20:58,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:20:58,955 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:20:58,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426503246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:58,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:20:58,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-06 00:20:58,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809265075] [2021-06-06 00:20:58,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:20:58,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:20:58,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:20:58,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:20:58,957 INFO L87 Difference]: Start difference. First operand 1355 states and 4402 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:59,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:20:59,726 INFO L93 Difference]: Finished difference Result 3586 states and 10726 transitions. [2021-06-06 00:20:59,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-06 00:20:59,726 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:20:59,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:20:59,730 INFO L225 Difference]: With dead ends: 3586 [2021-06-06 00:20:59,730 INFO L226 Difference]: Without dead ends: 3538 [2021-06-06 00:20:59,731 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 474.9ms TimeCoverageRelationStatistics Valid=596, Invalid=2160, Unknown=0, NotChecked=0, Total=2756 [2021-06-06 00:20:59,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3538 states. [2021-06-06 00:20:59,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3538 to 1367. [2021-06-06 00:20:59,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1367 states, 1366 states have (on average 3.2423133235724744) internal successors, (4429), 1366 states have internal predecessors, (4429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:59,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1367 states to 1367 states and 4429 transitions. [2021-06-06 00:20:59,757 INFO L78 Accepts]: Start accepts. Automaton has 1367 states and 4429 transitions. Word has length 30 [2021-06-06 00:20:59,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:20:59,757 INFO L482 AbstractCegarLoop]: Abstraction has 1367 states and 4429 transitions. [2021-06-06 00:20:59,757 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:20:59,757 INFO L276 IsEmpty]: Start isEmpty. Operand 1367 states and 4429 transitions. [2021-06-06 00:20:59,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:20:59,759 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:20:59,759 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:20:59,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-06 00:20:59,960 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:20:59,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:20:59,960 INFO L82 PathProgramCache]: Analyzing trace with hash -150600370, now seen corresponding path program 18 times [2021-06-06 00:20:59,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:20:59,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296072836] [2021-06-06 00:20:59,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:20:59,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:21:00,003 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:00,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:21:00,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296072836] [2021-06-06 00:21:00,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296072836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:00,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908010542] [2021-06-06 00:21:00,003 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:21:00,027 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:21:00,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:21:00,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:21:00,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:21:00,126 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:21:00,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908010542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:00,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:21:00,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-06 00:21:00,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81753542] [2021-06-06 00:21:00,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:21:00,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:21:00,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:21:00,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:21:00,127 INFO L87 Difference]: Start difference. First operand 1367 states and 4429 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:00,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:21:00,799 INFO L93 Difference]: Finished difference Result 3947 states and 11608 transitions. [2021-06-06 00:21:00,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-06 00:21:00,800 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:21:00,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:21:00,804 INFO L225 Difference]: With dead ends: 3947 [2021-06-06 00:21:00,804 INFO L226 Difference]: Without dead ends: 3871 [2021-06-06 00:21:00,804 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 431.9ms TimeCoverageRelationStatistics Valid=584, Invalid=2172, Unknown=0, NotChecked=0, Total=2756 [2021-06-06 00:21:00,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3871 states. [2021-06-06 00:21:00,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3871 to 1381. [2021-06-06 00:21:00,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1381 states, 1380 states have (on average 3.2405797101449276) internal successors, (4472), 1380 states have internal predecessors, (4472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:00,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1381 states to 1381 states and 4472 transitions. [2021-06-06 00:21:00,833 INFO L78 Accepts]: Start accepts. Automaton has 1381 states and 4472 transitions. Word has length 30 [2021-06-06 00:21:00,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:21:00,834 INFO L482 AbstractCegarLoop]: Abstraction has 1381 states and 4472 transitions. [2021-06-06 00:21:00,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:00,834 INFO L276 IsEmpty]: Start isEmpty. Operand 1381 states and 4472 transitions. [2021-06-06 00:21:00,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:21:00,836 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:21:00,836 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:21:01,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-06 00:21:01,058 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:21:01,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:21:01,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1642605102, now seen corresponding path program 19 times [2021-06-06 00:21:01,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:21:01,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869695680] [2021-06-06 00:21:01,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:21:01,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:21:01,098 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:01,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:21:01,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869695680] [2021-06-06 00:21:01,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869695680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:01,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252074093] [2021-06-06 00:21:01,099 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:21:01,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:21:01,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:21:01,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:21:01,199 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:21:01,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252074093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:01,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:21:01,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-06 00:21:01,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279816858] [2021-06-06 00:21:01,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:21:01,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:21:01,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:21:01,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:21:01,200 INFO L87 Difference]: Start difference. First operand 1381 states and 4472 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:01,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:21:01,890 INFO L93 Difference]: Finished difference Result 3759 states and 11296 transitions. [2021-06-06 00:21:01,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-06 00:21:01,890 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:21:01,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:21:01,894 INFO L225 Difference]: With dead ends: 3759 [2021-06-06 00:21:01,894 INFO L226 Difference]: Without dead ends: 3739 [2021-06-06 00:21:01,895 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 995 ImplicationChecksByTransitivity, 442.7ms TimeCoverageRelationStatistics Valid=649, Invalid=2431, Unknown=0, NotChecked=0, Total=3080 [2021-06-06 00:21:01,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3739 states. [2021-06-06 00:21:01,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3739 to 1571. [2021-06-06 00:21:01,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1571 states, 1570 states have (on average 3.186624203821656) internal successors, (5003), 1570 states have internal predecessors, (5003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:01,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1571 states to 1571 states and 5003 transitions. [2021-06-06 00:21:01,922 INFO L78 Accepts]: Start accepts. Automaton has 1571 states and 5003 transitions. Word has length 30 [2021-06-06 00:21:01,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:21:01,923 INFO L482 AbstractCegarLoop]: Abstraction has 1571 states and 5003 transitions. [2021-06-06 00:21:01,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:01,923 INFO L276 IsEmpty]: Start isEmpty. Operand 1571 states and 5003 transitions. [2021-06-06 00:21:01,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:21:01,925 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:21:01,925 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:21:02,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-06 00:21:02,125 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:21:02,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:21:02,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1372095410, now seen corresponding path program 20 times [2021-06-06 00:21:02,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:21:02,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782664932] [2021-06-06 00:21:02,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:21:02,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:21:02,163 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:02,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:21:02,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782664932] [2021-06-06 00:21:02,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782664932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:02,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399544197] [2021-06-06 00:21:02,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:21:02,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:21:02,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:21:02,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:21:02,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:21:02,290 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:21:02,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399544197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:02,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:21:02,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-06 00:21:02,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69455808] [2021-06-06 00:21:02,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:21:02,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:21:02,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:21:02,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:21:02,292 INFO L87 Difference]: Start difference. First operand 1571 states and 5003 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:03,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:21:03,133 INFO L93 Difference]: Finished difference Result 4002 states and 11899 transitions. [2021-06-06 00:21:03,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-06 00:21:03,133 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:21:03,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:21:03,138 INFO L225 Difference]: With dead ends: 4002 [2021-06-06 00:21:03,138 INFO L226 Difference]: Without dead ends: 4002 [2021-06-06 00:21:03,138 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1494 ImplicationChecksByTransitivity, 577.6ms TimeCoverageRelationStatistics Valid=869, Invalid=3291, Unknown=0, NotChecked=0, Total=4160 [2021-06-06 00:21:03,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4002 states. [2021-06-06 00:21:03,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4002 to 1386. [2021-06-06 00:21:03,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1386 states, 1385 states have (on average 3.2368231046931406) internal successors, (4483), 1385 states have internal predecessors, (4483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:03,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1386 states to 1386 states and 4483 transitions. [2021-06-06 00:21:03,167 INFO L78 Accepts]: Start accepts. Automaton has 1386 states and 4483 transitions. Word has length 30 [2021-06-06 00:21:03,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:21:03,168 INFO L482 AbstractCegarLoop]: Abstraction has 1386 states and 4483 transitions. [2021-06-06 00:21:03,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:03,168 INFO L276 IsEmpty]: Start isEmpty. Operand 1386 states and 4483 transitions. [2021-06-06 00:21:03,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:21:03,170 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:21:03,170 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:21:03,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-06 00:21:03,385 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:21:03,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:21:03,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1532772694, now seen corresponding path program 21 times [2021-06-06 00:21:03,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:21:03,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643878292] [2021-06-06 00:21:03,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:21:03,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:21:03,434 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:03,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:21:03,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643878292] [2021-06-06 00:21:03,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643878292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:03,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942537628] [2021-06-06 00:21:03,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:21:03,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-06 00:21:03,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:21:03,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:21:03,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:21:03,607 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:03,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942537628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:03,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:21:03,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-06 00:21:03,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811946460] [2021-06-06 00:21:03,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:21:03,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:21:03,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:21:03,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:21:03,609 INFO L87 Difference]: Start difference. First operand 1386 states and 4483 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:04,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:21:04,875 INFO L93 Difference]: Finished difference Result 5413 states and 16415 transitions. [2021-06-06 00:21:04,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-06 00:21:04,876 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:21:04,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:21:04,883 INFO L225 Difference]: With dead ends: 5413 [2021-06-06 00:21:04,883 INFO L226 Difference]: Without dead ends: 5413 [2021-06-06 00:21:04,884 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2469 ImplicationChecksByTransitivity, 911.2ms TimeCoverageRelationStatistics Valid=1250, Invalid=5392, Unknown=0, NotChecked=0, Total=6642 [2021-06-06 00:21:04,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5413 states. [2021-06-06 00:21:04,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5413 to 1890. [2021-06-06 00:21:04,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1890 states, 1889 states have (on average 3.338803599788248) internal successors, (6307), 1889 states have internal predecessors, (6307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:04,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1890 states to 1890 states and 6307 transitions. [2021-06-06 00:21:04,930 INFO L78 Accepts]: Start accepts. Automaton has 1890 states and 6307 transitions. Word has length 30 [2021-06-06 00:21:04,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:21:04,930 INFO L482 AbstractCegarLoop]: Abstraction has 1890 states and 6307 transitions. [2021-06-06 00:21:04,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:04,930 INFO L276 IsEmpty]: Start isEmpty. Operand 1890 states and 6307 transitions. [2021-06-06 00:21:04,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:21:04,932 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:21:04,932 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:21:05,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-06 00:21:05,133 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:21:05,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:21:05,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1706817208, now seen corresponding path program 22 times [2021-06-06 00:21:05,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:21:05,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831516033] [2021-06-06 00:21:05,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:21:05,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:21:05,181 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:05,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:21:05,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831516033] [2021-06-06 00:21:05,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831516033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:05,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341824479] [2021-06-06 00:21:05,182 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:21:05,212 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:21:05,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:21:05,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:21:05,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:21:05,316 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:05,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341824479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:05,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:21:05,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-06 00:21:05,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479949419] [2021-06-06 00:21:05,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:21:05,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:21:05,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:21:05,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:21:05,317 INFO L87 Difference]: Start difference. First operand 1890 states and 6307 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:06,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:21:06,356 INFO L93 Difference]: Finished difference Result 5130 states and 15678 transitions. [2021-06-06 00:21:06,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-06 00:21:06,356 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:21:06,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:21:06,363 INFO L225 Difference]: With dead ends: 5130 [2021-06-06 00:21:06,363 INFO L226 Difference]: Without dead ends: 5114 [2021-06-06 00:21:06,363 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1694 ImplicationChecksByTransitivity, 696.5ms TimeCoverageRelationStatistics Valid=973, Invalid=3857, Unknown=0, NotChecked=0, Total=4830 [2021-06-06 00:21:06,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5114 states. [2021-06-06 00:21:06,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5114 to 1830. [2021-06-06 00:21:06,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1830 states, 1829 states have (on average 3.348824494259158) internal successors, (6125), 1829 states have internal predecessors, (6125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:06,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1830 states to 1830 states and 6125 transitions. [2021-06-06 00:21:06,403 INFO L78 Accepts]: Start accepts. Automaton has 1830 states and 6125 transitions. Word has length 30 [2021-06-06 00:21:06,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:21:06,403 INFO L482 AbstractCegarLoop]: Abstraction has 1830 states and 6125 transitions. [2021-06-06 00:21:06,404 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:06,404 INFO L276 IsEmpty]: Start isEmpty. Operand 1830 states and 6125 transitions. [2021-06-06 00:21:06,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:21:06,407 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:21:06,407 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:21:06,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-06 00:21:06,618 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:21:06,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:21:06,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1105015150, now seen corresponding path program 23 times [2021-06-06 00:21:06,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:21:06,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782614568] [2021-06-06 00:21:06,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:21:06,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:21:06,665 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:06,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:21:06,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782614568] [2021-06-06 00:21:06,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782614568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:06,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251297563] [2021-06-06 00:21:06,665 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:21:06,689 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:21:06,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:21:06,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:21:06,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:21:06,781 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:06,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251297563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:06,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:21:06,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-06 00:21:06,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964137697] [2021-06-06 00:21:06,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:21:06,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:21:06,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:21:06,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:21:06,782 INFO L87 Difference]: Start difference. First operand 1830 states and 6125 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:07,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:21:07,618 INFO L93 Difference]: Finished difference Result 4815 states and 14976 transitions. [2021-06-06 00:21:07,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-06 00:21:07,618 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:21:07,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:21:07,623 INFO L225 Difference]: With dead ends: 4815 [2021-06-06 00:21:07,624 INFO L226 Difference]: Without dead ends: 4767 [2021-06-06 00:21:07,624 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1238 ImplicationChecksByTransitivity, 578.3ms TimeCoverageRelationStatistics Valid=750, Invalid=3032, Unknown=0, NotChecked=0, Total=3782 [2021-06-06 00:21:07,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4767 states. [2021-06-06 00:21:07,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4767 to 1882. [2021-06-06 00:21:07,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1882 states, 1881 states have (on average 3.334928229665072) internal successors, (6273), 1881 states have internal predecessors, (6273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:07,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1882 states to 1882 states and 6273 transitions. [2021-06-06 00:21:07,658 INFO L78 Accepts]: Start accepts. Automaton has 1882 states and 6273 transitions. Word has length 30 [2021-06-06 00:21:07,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:21:07,659 INFO L482 AbstractCegarLoop]: Abstraction has 1882 states and 6273 transitions. [2021-06-06 00:21:07,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:07,659 INFO L276 IsEmpty]: Start isEmpty. Operand 1882 states and 6273 transitions. [2021-06-06 00:21:07,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:21:07,662 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:21:07,662 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:21:07,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:21:07,881 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:21:07,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:21:07,881 INFO L82 PathProgramCache]: Analyzing trace with hash 441056662, now seen corresponding path program 24 times [2021-06-06 00:21:07,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:21:07,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361076437] [2021-06-06 00:21:07,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:21:07,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:21:07,930 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:07,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:21:07,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361076437] [2021-06-06 00:21:07,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361076437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:07,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595640791] [2021-06-06 00:21:07,931 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:21:07,971 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:21:07,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:21:07,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:21:07,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:21:08,060 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:08,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595640791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:08,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:21:08,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-06 00:21:08,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451702662] [2021-06-06 00:21:08,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:21:08,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:21:08,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:21:08,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:21:08,061 INFO L87 Difference]: Start difference. First operand 1882 states and 6273 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:08,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:21:08,860 INFO L93 Difference]: Finished difference Result 4941 states and 15164 transitions. [2021-06-06 00:21:08,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-06 00:21:08,860 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:21:08,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:21:08,867 INFO L225 Difference]: With dead ends: 4941 [2021-06-06 00:21:08,867 INFO L226 Difference]: Without dead ends: 4861 [2021-06-06 00:21:08,867 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 535.6ms TimeCoverageRelationStatistics Valid=696, Invalid=2726, Unknown=0, NotChecked=0, Total=3422 [2021-06-06 00:21:08,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4861 states. [2021-06-06 00:21:08,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4861 to 2178. [2021-06-06 00:21:08,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2178 states, 2177 states have (on average 3.3674781809830043) internal successors, (7331), 2177 states have internal predecessors, (7331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:08,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2178 states to 2178 states and 7331 transitions. [2021-06-06 00:21:08,962 INFO L78 Accepts]: Start accepts. Automaton has 2178 states and 7331 transitions. Word has length 30 [2021-06-06 00:21:08,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:21:08,962 INFO L482 AbstractCegarLoop]: Abstraction has 2178 states and 7331 transitions. [2021-06-06 00:21:08,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:08,962 INFO L276 IsEmpty]: Start isEmpty. Operand 2178 states and 7331 transitions. [2021-06-06 00:21:08,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:21:08,965 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:21:08,965 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:21:09,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:21:09,166 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:21:09,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:21:09,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1158883238, now seen corresponding path program 25 times [2021-06-06 00:21:09,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:21:09,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775543121] [2021-06-06 00:21:09,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:21:09,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:21:09,206 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:09,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:21:09,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775543121] [2021-06-06 00:21:09,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775543121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:09,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937082852] [2021-06-06 00:21:09,207 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:21:09,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:21:09,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:21:09,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:21:09,371 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:09,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937082852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:09,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:21:09,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-06 00:21:09,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159029016] [2021-06-06 00:21:09,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:21:09,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:21:09,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:21:09,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:21:09,373 INFO L87 Difference]: Start difference. First operand 2178 states and 7331 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:10,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:21:10,254 INFO L93 Difference]: Finished difference Result 6842 states and 21215 transitions. [2021-06-06 00:21:10,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-06 00:21:10,254 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:21:10,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:21:10,264 INFO L225 Difference]: With dead ends: 6842 [2021-06-06 00:21:10,264 INFO L226 Difference]: Without dead ends: 6842 [2021-06-06 00:21:10,265 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1351 ImplicationChecksByTransitivity, 580.9ms TimeCoverageRelationStatistics Valid=872, Invalid=3034, Unknown=0, NotChecked=0, Total=3906 [2021-06-06 00:21:10,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6842 states. [2021-06-06 00:21:10,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6842 to 2474. [2021-06-06 00:21:10,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2474 states, 2473 states have (on average 3.4488475535786494) internal successors, (8529), 2473 states have internal predecessors, (8529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:10,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2474 states to 2474 states and 8529 transitions. [2021-06-06 00:21:10,346 INFO L78 Accepts]: Start accepts. Automaton has 2474 states and 8529 transitions. Word has length 30 [2021-06-06 00:21:10,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:21:10,346 INFO L482 AbstractCegarLoop]: Abstraction has 2474 states and 8529 transitions. [2021-06-06 00:21:10,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:10,346 INFO L276 IsEmpty]: Start isEmpty. Operand 2474 states and 8529 transitions. [2021-06-06 00:21:10,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:21:10,350 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:21:10,350 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:21:10,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-06 00:21:10,567 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:21:10,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:21:10,567 INFO L82 PathProgramCache]: Analyzing trace with hash 103505844, now seen corresponding path program 26 times [2021-06-06 00:21:10,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:21:10,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335887865] [2021-06-06 00:21:10,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:21:10,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:21:10,611 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:10,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:21:10,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335887865] [2021-06-06 00:21:10,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335887865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:10,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456938941] [2021-06-06 00:21:10,611 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:21:10,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:21:10,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:21:10,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:21:10,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:21:10,791 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:10,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456938941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:10,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:21:10,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-06 00:21:10,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944079589] [2021-06-06 00:21:10,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:21:10,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:21:10,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:21:10,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:21:10,793 INFO L87 Difference]: Start difference. First operand 2474 states and 8529 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:11,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:21:11,665 INFO L93 Difference]: Finished difference Result 6641 states and 20706 transitions. [2021-06-06 00:21:11,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-06 00:21:11,666 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:21:11,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:21:11,677 INFO L225 Difference]: With dead ends: 6641 [2021-06-06 00:21:11,677 INFO L226 Difference]: Without dead ends: 6617 [2021-06-06 00:21:11,678 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1107 ImplicationChecksByTransitivity, 554.6ms TimeCoverageRelationStatistics Valid=767, Invalid=2539, Unknown=0, NotChecked=0, Total=3306 [2021-06-06 00:21:11,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6617 states. [2021-06-06 00:21:11,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6617 to 2462. [2021-06-06 00:21:11,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2462 states, 2461 states have (on average 3.4461600975213327) internal successors, (8481), 2461 states have internal predecessors, (8481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:11,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2462 states to 2462 states and 8481 transitions. [2021-06-06 00:21:11,733 INFO L78 Accepts]: Start accepts. Automaton has 2462 states and 8481 transitions. Word has length 30 [2021-06-06 00:21:11,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:21:11,733 INFO L482 AbstractCegarLoop]: Abstraction has 2462 states and 8481 transitions. [2021-06-06 00:21:11,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:11,733 INFO L276 IsEmpty]: Start isEmpty. Operand 2462 states and 8481 transitions. [2021-06-06 00:21:11,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:21:11,736 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:21:11,736 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:21:11,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:21:11,937 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:21:11,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:21:11,937 INFO L82 PathProgramCache]: Analyzing trace with hash 954749098, now seen corresponding path program 27 times [2021-06-06 00:21:11,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:21:11,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271254847] [2021-06-06 00:21:11,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:21:11,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:21:11,973 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:11,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:21:11,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271254847] [2021-06-06 00:21:11,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271254847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:11,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437837479] [2021-06-06 00:21:11,973 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:21:11,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:21:11,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:21:11,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-06 00:21:11,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:21:12,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-06 00:21:12,106 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:21:12,112 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:21:12,113 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:21:12,113 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-06 00:21:12,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:21:12,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-06-06 00:21:12,176 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:21:12,186 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:21:12,202 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-06 00:21:12,202 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:41 [2021-06-06 00:21:12,310 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:21:12,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437837479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:12,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:21:12,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14] total 21 [2021-06-06 00:21:12,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068293209] [2021-06-06 00:21:12,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:21:12,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:21:12,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:21:12,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:21:12,311 INFO L87 Difference]: Start difference. First operand 2462 states and 8481 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:16,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:21:16,361 INFO L93 Difference]: Finished difference Result 7094 states and 21992 transitions. [2021-06-06 00:21:16,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2021-06-06 00:21:16,362 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:21:16,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:21:16,372 INFO L225 Difference]: With dead ends: 7094 [2021-06-06 00:21:16,372 INFO L226 Difference]: Without dead ends: 7094 [2021-06-06 00:21:16,373 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7400 ImplicationChecksByTransitivity, 3283.4ms TimeCoverageRelationStatistics Valid=2804, Invalid=16656, Unknown=0, NotChecked=0, Total=19460 [2021-06-06 00:21:16,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7094 states. [2021-06-06 00:21:16,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7094 to 2546. [2021-06-06 00:21:16,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2546 states, 2545 states have (on average 3.4675834970530452) internal successors, (8825), 2545 states have internal predecessors, (8825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:16,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2546 states to 2546 states and 8825 transitions. [2021-06-06 00:21:16,434 INFO L78 Accepts]: Start accepts. Automaton has 2546 states and 8825 transitions. Word has length 30 [2021-06-06 00:21:16,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:21:16,435 INFO L482 AbstractCegarLoop]: Abstraction has 2546 states and 8825 transitions. [2021-06-06 00:21:16,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:16,435 INFO L276 IsEmpty]: Start isEmpty. Operand 2546 states and 8825 transitions. [2021-06-06 00:21:16,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:21:16,440 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:21:16,440 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:21:16,651 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:21:16,651 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:21:16,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:21:16,651 INFO L82 PathProgramCache]: Analyzing trace with hash -52824090, now seen corresponding path program 28 times [2021-06-06 00:21:16,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:21:16,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648657446] [2021-06-06 00:21:16,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:21:16,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:21:16,690 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:16,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:21:16,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648657446] [2021-06-06 00:21:16,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648657446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:16,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112306590] [2021-06-06 00:21:16,691 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:21:16,732 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:21:16,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:21:16,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:21:16,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:21:16,850 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:16,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112306590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:16,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:21:16,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-06 00:21:16,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867115600] [2021-06-06 00:21:16,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:21:16,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:21:16,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:21:16,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:21:16,851 INFO L87 Difference]: Start difference. First operand 2546 states and 8825 transitions. Second operand has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:17,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:21:17,827 INFO L93 Difference]: Finished difference Result 7653 states and 24222 transitions. [2021-06-06 00:21:17,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-06 00:21:17,827 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:21:17,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:21:17,838 INFO L225 Difference]: With dead ends: 7653 [2021-06-06 00:21:17,839 INFO L226 Difference]: Without dead ends: 7653 [2021-06-06 00:21:17,839 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1796 ImplicationChecksByTransitivity, 671.5ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-06-06 00:21:17,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7653 states. [2021-06-06 00:21:17,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7653 to 2551. [2021-06-06 00:21:17,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2551 states, 2550 states have (on average 3.4705882352941178) internal successors, (8850), 2550 states have internal predecessors, (8850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:17,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2551 states to 2551 states and 8850 transitions. [2021-06-06 00:21:17,902 INFO L78 Accepts]: Start accepts. Automaton has 2551 states and 8850 transitions. Word has length 30 [2021-06-06 00:21:17,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:21:17,902 INFO L482 AbstractCegarLoop]: Abstraction has 2551 states and 8850 transitions. [2021-06-06 00:21:17,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:17,902 INFO L276 IsEmpty]: Start isEmpty. Operand 2551 states and 8850 transitions. [2021-06-06 00:21:17,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:21:17,905 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:21:17,905 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:21:18,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-06-06 00:21:18,106 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:21:18,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:21:18,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1172821128, now seen corresponding path program 29 times [2021-06-06 00:21:18,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:21:18,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443762791] [2021-06-06 00:21:18,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:21:18,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:21:18,144 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:18,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:21:18,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443762791] [2021-06-06 00:21:18,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443762791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:18,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101480486] [2021-06-06 00:21:18,145 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:21:18,190 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:21:18,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:21:18,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:21:18,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:21:18,291 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:18,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101480486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:18,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:21:18,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-06 00:21:18,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047398551] [2021-06-06 00:21:18,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:21:18,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:21:18,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:21:18,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:21:18,292 INFO L87 Difference]: Start difference. First operand 2551 states and 8850 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:19,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:21:19,243 INFO L93 Difference]: Finished difference Result 6999 states and 21972 transitions. [2021-06-06 00:21:19,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-06 00:21:19,243 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:21:19,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:21:19,253 INFO L225 Difference]: With dead ends: 6999 [2021-06-06 00:21:19,253 INFO L226 Difference]: Without dead ends: 6979 [2021-06-06 00:21:19,253 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1141 ImplicationChecksByTransitivity, 564.6ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-06-06 00:21:19,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6979 states. [2021-06-06 00:21:19,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6979 to 2561. [2021-06-06 00:21:19,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2561 states, 2560 states have (on average 3.469140625) internal successors, (8881), 2560 states have internal predecessors, (8881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:19,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2561 states to 2561 states and 8881 transitions. [2021-06-06 00:21:19,314 INFO L78 Accepts]: Start accepts. Automaton has 2561 states and 8881 transitions. Word has length 30 [2021-06-06 00:21:19,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:21:19,315 INFO L482 AbstractCegarLoop]: Abstraction has 2561 states and 8881 transitions. [2021-06-06 00:21:19,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:19,315 INFO L276 IsEmpty]: Start isEmpty. Operand 2561 states and 8881 transitions. [2021-06-06 00:21:19,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:21:19,318 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:21:19,318 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:21:19,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-06 00:21:19,519 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:21:19,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:21:19,519 INFO L82 PathProgramCache]: Analyzing trace with hash -902311436, now seen corresponding path program 30 times [2021-06-06 00:21:19,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:21:19,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964355659] [2021-06-06 00:21:19,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:21:19,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:21:19,554 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:19,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:21:19,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964355659] [2021-06-06 00:21:19,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964355659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:19,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688600487] [2021-06-06 00:21:19,554 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:21:19,579 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:21:19,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:21:19,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:21:19,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:21:19,674 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:19,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688600487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:19,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:21:19,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-06 00:21:19,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323607226] [2021-06-06 00:21:19,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:21:19,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:21:19,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:21:19,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:21:19,675 INFO L87 Difference]: Start difference. First operand 2561 states and 8881 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:20,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:21:20,540 INFO L93 Difference]: Finished difference Result 7314 states and 22731 transitions. [2021-06-06 00:21:20,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-06 00:21:20,540 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:21:20,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:21:20,550 INFO L225 Difference]: With dead ends: 7314 [2021-06-06 00:21:20,550 INFO L226 Difference]: Without dead ends: 7314 [2021-06-06 00:21:20,551 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1501 ImplicationChecksByTransitivity, 561.2ms TimeCoverageRelationStatistics Valid=944, Invalid=3216, Unknown=0, NotChecked=0, Total=4160 [2021-06-06 00:21:20,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7314 states. [2021-06-06 00:21:20,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7314 to 2550. [2021-06-06 00:21:20,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2550 states, 2549 states have (on average 3.4699882306786973) internal successors, (8845), 2549 states have internal predecessors, (8845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:20,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2550 states to 2550 states and 8845 transitions. [2021-06-06 00:21:20,618 INFO L78 Accepts]: Start accepts. Automaton has 2550 states and 8845 transitions. Word has length 30 [2021-06-06 00:21:20,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:21:20,618 INFO L482 AbstractCegarLoop]: Abstraction has 2550 states and 8845 transitions. [2021-06-06 00:21:20,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:20,618 INFO L276 IsEmpty]: Start isEmpty. Operand 2550 states and 8845 transitions. [2021-06-06 00:21:20,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:21:20,623 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:21:20,623 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:21:20,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-06 00:21:20,837 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:21:20,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:21:20,837 INFO L82 PathProgramCache]: Analyzing trace with hash -317283250, now seen corresponding path program 31 times [2021-06-06 00:21:20,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:21:20,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915301715] [2021-06-06 00:21:20,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:21:20,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:21:20,878 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:20,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:21:20,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915301715] [2021-06-06 00:21:20,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915301715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:20,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103248576] [2021-06-06 00:21:20,878 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:21:20,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:21:20,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:21:20,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:21:20,997 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:20,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103248576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:20,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:21:20,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-06 00:21:20,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232357957] [2021-06-06 00:21:20,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:21:20,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:21:20,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:21:20,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:21:20,998 INFO L87 Difference]: Start difference. First operand 2550 states and 8845 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:21,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:21:21,583 INFO L93 Difference]: Finished difference Result 5631 states and 17797 transitions. [2021-06-06 00:21:21,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-06 00:21:21,583 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:21:21,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:21:21,590 INFO L225 Difference]: With dead ends: 5631 [2021-06-06 00:21:21,591 INFO L226 Difference]: Without dead ends: 5583 [2021-06-06 00:21:21,591 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 362.3ms TimeCoverageRelationStatistics Valid=498, Invalid=1758, Unknown=0, NotChecked=0, Total=2256 [2021-06-06 00:21:21,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5583 states. [2021-06-06 00:21:21,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5583 to 2564. [2021-06-06 00:21:21,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2564 states, 2563 states have (on average 3.467811158798283) internal successors, (8888), 2563 states have internal predecessors, (8888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:21,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2564 states to 2564 states and 8888 transitions. [2021-06-06 00:21:21,645 INFO L78 Accepts]: Start accepts. Automaton has 2564 states and 8888 transitions. Word has length 30 [2021-06-06 00:21:21,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:21:21,645 INFO L482 AbstractCegarLoop]: Abstraction has 2564 states and 8888 transitions. [2021-06-06 00:21:21,646 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:21,646 INFO L276 IsEmpty]: Start isEmpty. Operand 2564 states and 8888 transitions. [2021-06-06 00:21:21,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:21:21,649 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:21:21,649 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:21:21,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:21:21,850 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:21:21,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:21:21,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1809287982, now seen corresponding path program 32 times [2021-06-06 00:21:21,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:21:21,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13411035] [2021-06-06 00:21:21,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:21:21,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:21:21,890 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:21,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:21:21,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13411035] [2021-06-06 00:21:21,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13411035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:21,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75960170] [2021-06-06 00:21:21,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:21:21,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:21:21,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:21:21,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:21:21,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:21:22,009 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:22,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75960170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:22,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:21:22,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-06 00:21:22,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299127948] [2021-06-06 00:21:22,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:21:22,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:21:22,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:21:22,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:21:22,010 INFO L87 Difference]: Start difference. First operand 2564 states and 8888 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:22,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:21:22,933 INFO L93 Difference]: Finished difference Result 6400 states and 19785 transitions. [2021-06-06 00:21:22,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-06 00:21:22,933 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:21:22,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:21:22,941 INFO L225 Difference]: With dead ends: 6400 [2021-06-06 00:21:22,941 INFO L226 Difference]: Without dead ends: 6384 [2021-06-06 00:21:22,941 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 556.6ms TimeCoverageRelationStatistics Valid=736, Invalid=2804, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:21:22,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6384 states. [2021-06-06 00:21:22,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6384 to 2642. [2021-06-06 00:21:22,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2642 states, 2641 states have (on average 3.452101476713366) internal successors, (9117), 2641 states have internal predecessors, (9117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:22,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2642 states to 2642 states and 9117 transitions. [2021-06-06 00:21:23,000 INFO L78 Accepts]: Start accepts. Automaton has 2642 states and 9117 transitions. Word has length 30 [2021-06-06 00:21:23,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:21:23,000 INFO L482 AbstractCegarLoop]: Abstraction has 2642 states and 9117 transitions. [2021-06-06 00:21:23,000 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:23,000 INFO L276 IsEmpty]: Start isEmpty. Operand 2642 states and 9117 transitions. [2021-06-06 00:21:23,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:21:23,004 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:21:23,004 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:21:23,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-06 00:21:23,204 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:21:23,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:21:23,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1538778290, now seen corresponding path program 33 times [2021-06-06 00:21:23,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:21:23,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581429311] [2021-06-06 00:21:23,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:21:23,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:21:23,243 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:23,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:21:23,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581429311] [2021-06-06 00:21:23,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581429311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:23,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242597516] [2021-06-06 00:21:23,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:21:23,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:21:23,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:21:23,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:21:23,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:21:23,378 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:23,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242597516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:23,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:21:23,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-06 00:21:23,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757148094] [2021-06-06 00:21:23,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:21:23,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:21:23,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:21:23,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:21:23,379 INFO L87 Difference]: Start difference. First operand 2642 states and 9117 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:24,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:21:24,312 INFO L93 Difference]: Finished difference Result 6651 states and 20412 transitions. [2021-06-06 00:21:24,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-06 00:21:24,312 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:21:24,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:21:24,322 INFO L225 Difference]: With dead ends: 6651 [2021-06-06 00:21:24,323 INFO L226 Difference]: Without dead ends: 6651 [2021-06-06 00:21:24,323 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1751 ImplicationChecksByTransitivity, 632.9ms TimeCoverageRelationStatistics Valid=978, Invalid=3714, Unknown=0, NotChecked=0, Total=4692 [2021-06-06 00:21:24,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6651 states. [2021-06-06 00:21:24,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6651 to 2550. [2021-06-06 00:21:24,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2550 states, 2549 states have (on average 3.4699882306786973) internal successors, (8845), 2549 states have internal predecessors, (8845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:24,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2550 states to 2550 states and 8845 transitions. [2021-06-06 00:21:24,384 INFO L78 Accepts]: Start accepts. Automaton has 2550 states and 8845 transitions. Word has length 30 [2021-06-06 00:21:24,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:21:24,384 INFO L482 AbstractCegarLoop]: Abstraction has 2550 states and 8845 transitions. [2021-06-06 00:21:24,384 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:24,385 INFO L276 IsEmpty]: Start isEmpty. Operand 2550 states and 8845 transitions. [2021-06-06 00:21:24,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:21:24,389 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:21:24,389 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:21:24,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:21:24,590 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:21:24,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:21:24,590 INFO L82 PathProgramCache]: Analyzing trace with hash 729705298, now seen corresponding path program 34 times [2021-06-06 00:21:24,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:21:24,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950490580] [2021-06-06 00:21:24,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:21:24,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:21:24,637 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:24,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:21:24,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950490580] [2021-06-06 00:21:24,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950490580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:24,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571239601] [2021-06-06 00:21:24,638 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:21:24,667 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:21:24,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:21:24,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:21:24,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:21:24,749 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:24,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571239601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:24,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:21:24,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-06 00:21:24,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927156955] [2021-06-06 00:21:24,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:21:24,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:21:24,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:21:24,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:21:24,751 INFO L87 Difference]: Start difference. First operand 2550 states and 8845 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:25,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:21:25,608 INFO L93 Difference]: Finished difference Result 6000 states and 18681 transitions. [2021-06-06 00:21:25,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-06 00:21:25,608 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:21:25,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:21:25,616 INFO L225 Difference]: With dead ends: 6000 [2021-06-06 00:21:25,617 INFO L226 Difference]: Without dead ends: 5912 [2021-06-06 00:21:25,617 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1124 ImplicationChecksByTransitivity, 554.9ms TimeCoverageRelationStatistics Valid=722, Invalid=2818, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:21:25,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5912 states. [2021-06-06 00:21:25,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5912 to 2568. [2021-06-06 00:21:25,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2568 states, 2567 states have (on average 3.4678613167121153) internal successors, (8902), 2567 states have internal predecessors, (8902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:25,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2568 states to 2568 states and 8902 transitions. [2021-06-06 00:21:25,693 INFO L78 Accepts]: Start accepts. Automaton has 2568 states and 8902 transitions. Word has length 30 [2021-06-06 00:21:25,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:21:25,693 INFO L482 AbstractCegarLoop]: Abstraction has 2568 states and 8902 transitions. [2021-06-06 00:21:25,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:25,693 INFO L276 IsEmpty]: Start isEmpty. Operand 2568 states and 8902 transitions. [2021-06-06 00:21:25,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:21:25,696 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:21:25,696 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:21:25,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:21:25,897 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:21:25,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:21:25,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1432234710, now seen corresponding path program 35 times [2021-06-06 00:21:25,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:21:25,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114602390] [2021-06-06 00:21:25,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:21:25,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:21:25,945 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:25,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:21:25,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114602390] [2021-06-06 00:21:25,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114602390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:25,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107555946] [2021-06-06 00:21:25,945 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:21:25,976 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:21:25,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:21:25,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:21:25,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:21:26,046 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:26,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107555946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:26,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:21:26,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-06 00:21:26,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729085543] [2021-06-06 00:21:26,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:21:26,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:21:26,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:21:26,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:21:26,047 INFO L87 Difference]: Start difference. First operand 2568 states and 8902 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:26,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:21:26,905 INFO L93 Difference]: Finished difference Result 6028 states and 18895 transitions. [2021-06-06 00:21:26,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-06 00:21:26,905 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:21:26,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:21:26,914 INFO L225 Difference]: With dead ends: 6028 [2021-06-06 00:21:26,914 INFO L226 Difference]: Without dead ends: 5980 [2021-06-06 00:21:26,914 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1340 ImplicationChecksByTransitivity, 566.9ms TimeCoverageRelationStatistics Valid=814, Invalid=3218, Unknown=0, NotChecked=0, Total=4032 [2021-06-06 00:21:26,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5980 states. [2021-06-06 00:21:26,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5980 to 2814. [2021-06-06 00:21:26,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2814 states, 2813 states have (on average 3.407394241023818) internal successors, (9585), 2813 states have internal predecessors, (9585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:26,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2814 states to 2814 states and 9585 transitions. [2021-06-06 00:21:26,977 INFO L78 Accepts]: Start accepts. Automaton has 2814 states and 9585 transitions. Word has length 30 [2021-06-06 00:21:26,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:21:26,977 INFO L482 AbstractCegarLoop]: Abstraction has 2814 states and 9585 transitions. [2021-06-06 00:21:26,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:26,978 INFO L276 IsEmpty]: Start isEmpty. Operand 2814 states and 9585 transitions. [2021-06-06 00:21:26,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:21:26,981 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:21:26,981 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:21:27,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-06-06 00:21:27,181 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:21:27,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:21:27,182 INFO L82 PathProgramCache]: Analyzing trace with hash -2092961066, now seen corresponding path program 36 times [2021-06-06 00:21:27,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:21:27,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596968480] [2021-06-06 00:21:27,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:21:27,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:21:27,239 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:27,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:21:27,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596968480] [2021-06-06 00:21:27,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596968480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:27,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880221280] [2021-06-06 00:21:27,239 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:21:27,283 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:21:27,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:21:27,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:21:27,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:21:27,366 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:27,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880221280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:27,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:21:27,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-06 00:21:27,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468679628] [2021-06-06 00:21:27,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:21:27,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:21:27,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:21:27,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:21:27,367 INFO L87 Difference]: Start difference. First operand 2814 states and 9585 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:28,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:21:28,377 INFO L93 Difference]: Finished difference Result 6722 states and 20709 transitions. [2021-06-06 00:21:28,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-06 00:21:28,377 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:21:28,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:21:28,387 INFO L225 Difference]: With dead ends: 6722 [2021-06-06 00:21:28,387 INFO L226 Difference]: Without dead ends: 6710 [2021-06-06 00:21:28,388 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1865 ImplicationChecksByTransitivity, 660.9ms TimeCoverageRelationStatistics Valid=1035, Invalid=4221, Unknown=0, NotChecked=0, Total=5256 [2021-06-06 00:21:28,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6710 states. [2021-06-06 00:21:28,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6710 to 3090. [2021-06-06 00:21:28,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3090 states, 3089 states have (on average 3.354807381029459) internal successors, (10363), 3089 states have internal predecessors, (10363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:28,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3090 states to 3090 states and 10363 transitions. [2021-06-06 00:21:28,458 INFO L78 Accepts]: Start accepts. Automaton has 3090 states and 10363 transitions. Word has length 30 [2021-06-06 00:21:28,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:21:28,458 INFO L482 AbstractCegarLoop]: Abstraction has 3090 states and 10363 transitions. [2021-06-06 00:21:28,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:28,459 INFO L276 IsEmpty]: Start isEmpty. Operand 3090 states and 10363 transitions. [2021-06-06 00:21:28,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:21:28,463 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:21:28,463 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:21:28,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:21:28,664 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:21:28,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:21:28,664 INFO L82 PathProgramCache]: Analyzing trace with hash -1822451374, now seen corresponding path program 37 times [2021-06-06 00:21:28,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:21:28,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683574594] [2021-06-06 00:21:28,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:21:28,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:21:28,710 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:28,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:21:28,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683574594] [2021-06-06 00:21:28,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683574594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:28,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699266436] [2021-06-06 00:21:28,710 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:21:28,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:21:28,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:21:28,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:21:28,839 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:28,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699266436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:28,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:21:28,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-06 00:21:28,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118063779] [2021-06-06 00:21:28,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:21:28,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:21:28,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:21:28,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:21:28,840 INFO L87 Difference]: Start difference. First operand 3090 states and 10363 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:30,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:21:30,045 INFO L93 Difference]: Finished difference Result 7117 states and 21720 transitions. [2021-06-06 00:21:30,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-06 00:21:30,045 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:21:30,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:21:30,054 INFO L225 Difference]: With dead ends: 7117 [2021-06-06 00:21:30,055 INFO L226 Difference]: Without dead ends: 7117 [2021-06-06 00:21:30,055 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2848 ImplicationChecksByTransitivity, 841.9ms TimeCoverageRelationStatistics Valid=1421, Invalid=5889, Unknown=0, NotChecked=0, Total=7310 [2021-06-06 00:21:30,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7117 states. [2021-06-06 00:21:30,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7117 to 2928. [2021-06-06 00:21:30,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2928 states, 2927 states have (on average 3.3850358729074137) internal successors, (9908), 2927 states have internal predecessors, (9908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:30,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2928 states to 2928 states and 9908 transitions. [2021-06-06 00:21:30,123 INFO L78 Accepts]: Start accepts. Automaton has 2928 states and 9908 transitions. Word has length 30 [2021-06-06 00:21:30,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:21:30,123 INFO L482 AbstractCegarLoop]: Abstraction has 2928 states and 9908 transitions. [2021-06-06 00:21:30,123 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:30,123 INFO L276 IsEmpty]: Start isEmpty. Operand 2928 states and 9908 transitions. [2021-06-06 00:21:30,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-06 00:21:30,126 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:21:30,127 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:21:30,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-06 00:21:30,327 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:21:30,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:21:30,327 INFO L82 PathProgramCache]: Analyzing trace with hash -605801532, now seen corresponding path program 38 times [2021-06-06 00:21:30,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:21:30,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263769564] [2021-06-06 00:21:30,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:21:30,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:21:30,387 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:30,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:21:30,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263769564] [2021-06-06 00:21:30,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263769564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:30,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962047019] [2021-06-06 00:21:30,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:21:30,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:21:30,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:21:30,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-06 00:21:30,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:21:30,541 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:30,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962047019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:30,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:21:30,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-06 00:21:30,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149428345] [2021-06-06 00:21:30,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:21:30,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:21:30,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:21:30,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:21:30,554 INFO L87 Difference]: Start difference. First operand 2928 states and 9908 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:31,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:21:31,525 INFO L93 Difference]: Finished difference Result 11499 states and 37094 transitions. [2021-06-06 00:21:31,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-06 00:21:31,526 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-06 00:21:31,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:21:31,540 INFO L225 Difference]: With dead ends: 11499 [2021-06-06 00:21:31,540 INFO L226 Difference]: Without dead ends: 11499 [2021-06-06 00:21:31,541 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1286 ImplicationChecksByTransitivity, 586.7ms TimeCoverageRelationStatistics Valid=922, Invalid=2984, Unknown=0, NotChecked=0, Total=3906 [2021-06-06 00:21:31,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11499 states. [2021-06-06 00:21:31,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11499 to 3853. [2021-06-06 00:21:31,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3853 states, 3852 states have (on average 3.5983904465212877) internal successors, (13861), 3852 states have internal predecessors, (13861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:31,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3853 states to 3853 states and 13861 transitions. [2021-06-06 00:21:31,644 INFO L78 Accepts]: Start accepts. Automaton has 3853 states and 13861 transitions. Word has length 32 [2021-06-06 00:21:31,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:21:31,645 INFO L482 AbstractCegarLoop]: Abstraction has 3853 states and 13861 transitions. [2021-06-06 00:21:31,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:31,645 INFO L276 IsEmpty]: Start isEmpty. Operand 3853 states and 13861 transitions. [2021-06-06 00:21:31,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-06 00:21:31,652 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:21:31,652 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:21:31,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-06 00:21:31,853 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:21:31,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:21:31,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1297197704, now seen corresponding path program 17 times [2021-06-06 00:21:31,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:21:31,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116155816] [2021-06-06 00:21:31,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:21:31,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:21:31,904 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:31,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:21:31,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116155816] [2021-06-06 00:21:31,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116155816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:31,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527771160] [2021-06-06 00:21:31,905 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:21:31,931 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-06 00:21:31,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:21:31,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-06 00:21:31,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:21:32,060 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:32,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527771160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:32,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:21:32,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-06 00:21:32,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26745701] [2021-06-06 00:21:32,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:21:32,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:21:32,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:21:32,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:21:32,062 INFO L87 Difference]: Start difference. First operand 3853 states and 13861 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:33,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:21:33,118 INFO L93 Difference]: Finished difference Result 11274 states and 36638 transitions. [2021-06-06 00:21:33,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-06 00:21:33,119 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-06 00:21:33,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:21:33,135 INFO L225 Difference]: With dead ends: 11274 [2021-06-06 00:21:33,135 INFO L226 Difference]: Without dead ends: 11274 [2021-06-06 00:21:33,136 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 642.4ms TimeCoverageRelationStatistics Valid=918, Invalid=3114, Unknown=0, NotChecked=0, Total=4032 [2021-06-06 00:21:33,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11274 states. [2021-06-06 00:21:33,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11274 to 3659. [2021-06-06 00:21:33,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3659 states, 3658 states have (on average 3.548933843630399) internal successors, (12982), 3658 states have internal predecessors, (12982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:33,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3659 states to 3659 states and 12982 transitions. [2021-06-06 00:21:33,235 INFO L78 Accepts]: Start accepts. Automaton has 3659 states and 12982 transitions. Word has length 32 [2021-06-06 00:21:33,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:21:33,235 INFO L482 AbstractCegarLoop]: Abstraction has 3659 states and 12982 transitions. [2021-06-06 00:21:33,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:33,235 INFO L276 IsEmpty]: Start isEmpty. Operand 3659 states and 12982 transitions. [2021-06-06 00:21:33,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-06 00:21:33,239 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:21:33,239 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:21:33,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:21:33,440 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:21:33,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:21:33,440 INFO L82 PathProgramCache]: Analyzing trace with hash 600098510, now seen corresponding path program 39 times [2021-06-06 00:21:33,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:21:33,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204212837] [2021-06-06 00:21:33,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:21:33,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:21:33,479 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:33,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:21:33,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204212837] [2021-06-06 00:21:33,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204212837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:33,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527384213] [2021-06-06 00:21:33,480 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:21:33,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-06 00:21:33,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:21:33,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-06 00:21:33,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:21:33,630 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:33,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527384213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:33,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:21:33,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-06 00:21:33,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572374622] [2021-06-06 00:21:33,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:21:33,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:21:33,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:21:33,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:21:33,631 INFO L87 Difference]: Start difference. First operand 3659 states and 12982 transitions. Second operand has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:34,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:21:34,226 INFO L93 Difference]: Finished difference Result 9494 states and 30497 transitions. [2021-06-06 00:21:34,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-06 00:21:34,227 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-06 00:21:34,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:21:34,241 INFO L225 Difference]: With dead ends: 9494 [2021-06-06 00:21:34,241 INFO L226 Difference]: Without dead ends: 9486 [2021-06-06 00:21:34,241 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 302.0ms TimeCoverageRelationStatistics Valid=396, Invalid=1244, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:21:34,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9486 states. [2021-06-06 00:21:34,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9486 to 3671. [2021-06-06 00:21:34,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3671 states, 3670 states have (on average 3.5498637602179834) internal successors, (13028), 3670 states have internal predecessors, (13028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:34,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3671 states to 3671 states and 13028 transitions. [2021-06-06 00:21:34,360 INFO L78 Accepts]: Start accepts. Automaton has 3671 states and 13028 transitions. Word has length 32 [2021-06-06 00:21:34,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:21:34,360 INFO L482 AbstractCegarLoop]: Abstraction has 3671 states and 13028 transitions. [2021-06-06 00:21:34,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:34,360 INFO L276 IsEmpty]: Start isEmpty. Operand 3671 states and 13028 transitions. [2021-06-06 00:21:34,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-06 00:21:34,365 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:21:34,365 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:21:34,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-06 00:21:34,567 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:21:34,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:21:34,567 INFO L82 PathProgramCache]: Analyzing trace with hash 870608202, now seen corresponding path program 40 times [2021-06-06 00:21:34,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:21:34,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13267597] [2021-06-06 00:21:34,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:21:34,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:21:34,609 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:34,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:21:34,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13267597] [2021-06-06 00:21:34,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13267597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:34,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216104623] [2021-06-06 00:21:34,609 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:21:34,649 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:21:34,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:21:34,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-06 00:21:34,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:21:34,767 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:34,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216104623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:34,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:21:34,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-06 00:21:34,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039934908] [2021-06-06 00:21:34,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:21:34,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:21:34,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:21:34,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:21:34,769 INFO L87 Difference]: Start difference. First operand 3671 states and 13028 transitions. Second operand has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:35,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:21:35,478 INFO L93 Difference]: Finished difference Result 10005 states and 31855 transitions. [2021-06-06 00:21:35,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-06 00:21:35,478 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-06 00:21:35,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:21:35,494 INFO L225 Difference]: With dead ends: 10005 [2021-06-06 00:21:35,494 INFO L226 Difference]: Without dead ends: 10005 [2021-06-06 00:21:35,494 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 389.1ms TimeCoverageRelationStatistics Valid=480, Invalid=1412, Unknown=0, NotChecked=0, Total=1892 [2021-06-06 00:21:35,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10005 states. [2021-06-06 00:21:35,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10005 to 3659. [2021-06-06 00:21:35,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3659 states, 3658 states have (on average 3.548933843630399) internal successors, (12982), 3658 states have internal predecessors, (12982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:35,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3659 states to 3659 states and 12982 transitions. [2021-06-06 00:21:35,596 INFO L78 Accepts]: Start accepts. Automaton has 3659 states and 12982 transitions. Word has length 32 [2021-06-06 00:21:35,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:21:35,597 INFO L482 AbstractCegarLoop]: Abstraction has 3659 states and 12982 transitions. [2021-06-06 00:21:35,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:35,597 INFO L276 IsEmpty]: Start isEmpty. Operand 3659 states and 12982 transitions. [2021-06-06 00:21:35,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-06 00:21:35,602 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:21:35,602 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:21:35,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:21:35,802 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:21:35,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:21:35,803 INFO L82 PathProgramCache]: Analyzing trace with hash 2007937660, now seen corresponding path program 18 times [2021-06-06 00:21:35,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:21:35,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476011031] [2021-06-06 00:21:35,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:21:35,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:21:35,855 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:35,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:21:35,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476011031] [2021-06-06 00:21:35,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476011031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:35,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564675169] [2021-06-06 00:21:35,856 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:21:35,899 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-06 00:21:35,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:21:35,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:21:35,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:21:36,094 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:21:36,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564675169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:36,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:21:36,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-06-06 00:21:36,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143591852] [2021-06-06 00:21:36,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:21:36,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:21:36,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:21:36,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:21:36,095 INFO L87 Difference]: Start difference. First operand 3659 states and 12982 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:37,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:21:37,794 INFO L93 Difference]: Finished difference Result 10824 states and 34873 transitions. [2021-06-06 00:21:37,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-06-06 00:21:37,795 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-06 00:21:37,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:21:37,811 INFO L225 Difference]: With dead ends: 10824 [2021-06-06 00:21:37,811 INFO L226 Difference]: Without dead ends: 10824 [2021-06-06 00:21:37,811 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3112 ImplicationChecksByTransitivity, 1056.5ms TimeCoverageRelationStatistics Valid=1649, Invalid=7281, Unknown=0, NotChecked=0, Total=8930 [2021-06-06 00:21:37,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10824 states. [2021-06-06 00:21:37,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10824 to 4026. [2021-06-06 00:21:37,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4026 states, 4025 states have (on average 3.570683229813665) internal successors, (14372), 4025 states have internal predecessors, (14372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:37,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4026 states to 4026 states and 14372 transitions. [2021-06-06 00:21:37,931 INFO L78 Accepts]: Start accepts. Automaton has 4026 states and 14372 transitions. Word has length 32 [2021-06-06 00:21:37,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:21:37,931 INFO L482 AbstractCegarLoop]: Abstraction has 4026 states and 14372 transitions. [2021-06-06 00:21:37,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:37,931 INFO L276 IsEmpty]: Start isEmpty. Operand 4026 states and 14372 transitions. [2021-06-06 00:21:37,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-06 00:21:37,936 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:21:37,937 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:21:38,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-06 00:21:38,137 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:21:38,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:21:38,138 INFO L82 PathProgramCache]: Analyzing trace with hash -383319252, now seen corresponding path program 41 times [2021-06-06 00:21:38,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:21:38,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846952661] [2021-06-06 00:21:38,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:21:38,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:21:38,185 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:38,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:21:38,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846952661] [2021-06-06 00:21:38,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846952661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:38,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188335631] [2021-06-06 00:21:38,185 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:21:38,212 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-06 00:21:38,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:21:38,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:21:38,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:21:38,360 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:21:38,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188335631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:38,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:21:38,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-06 00:21:38,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393177768] [2021-06-06 00:21:38,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:21:38,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:21:38,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:21:38,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:21:38,361 INFO L87 Difference]: Start difference. First operand 4026 states and 14372 transitions. Second operand has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:40,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:21:40,322 INFO L93 Difference]: Finished difference Result 11450 states and 37158 transitions. [2021-06-06 00:21:40,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-06-06 00:21:40,323 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-06 00:21:40,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:21:40,341 INFO L225 Difference]: With dead ends: 11450 [2021-06-06 00:21:40,341 INFO L226 Difference]: Without dead ends: 11402 [2021-06-06 00:21:40,342 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4651 ImplicationChecksByTransitivity, 1318.3ms TimeCoverageRelationStatistics Valid=2133, Invalid=10299, Unknown=0, NotChecked=0, Total=12432 [2021-06-06 00:21:40,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11402 states. [2021-06-06 00:21:40,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11402 to 4295. [2021-06-06 00:21:40,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4295 states, 4294 states have (on average 3.6313460642757334) internal successors, (15593), 4294 states have internal predecessors, (15593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:40,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4295 states to 4295 states and 15593 transitions. [2021-06-06 00:21:40,458 INFO L78 Accepts]: Start accepts. Automaton has 4295 states and 15593 transitions. Word has length 32 [2021-06-06 00:21:40,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:21:40,458 INFO L482 AbstractCegarLoop]: Abstraction has 4295 states and 15593 transitions. [2021-06-06 00:21:40,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:40,458 INFO L276 IsEmpty]: Start isEmpty. Operand 4295 states and 15593 transitions. [2021-06-06 00:21:40,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-06 00:21:40,464 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:21:40,464 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:21:40,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:21:40,665 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:21:40,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:21:40,665 INFO L82 PathProgramCache]: Analyzing trace with hash 717122884, now seen corresponding path program 19 times [2021-06-06 00:21:40,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:21:40,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267848745] [2021-06-06 00:21:40,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:21:40,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:21:40,712 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:21:40,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:21:40,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267848745] [2021-06-06 00:21:40,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267848745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:40,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486083002] [2021-06-06 00:21:40,713 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:21:40,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:21:40,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-06 00:21:40,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:21:40,896 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:40,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486083002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:40,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:21:40,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-06 00:21:40,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980532913] [2021-06-06 00:21:40,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:21:40,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:21:40,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:21:40,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:21:40,897 INFO L87 Difference]: Start difference. First operand 4295 states and 15593 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:41,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:21:41,776 INFO L93 Difference]: Finished difference Result 11886 states and 38735 transitions. [2021-06-06 00:21:41,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-06 00:21:41,776 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-06 00:21:41,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:21:41,800 INFO L225 Difference]: With dead ends: 11886 [2021-06-06 00:21:41,800 INFO L226 Difference]: Without dead ends: 11886 [2021-06-06 00:21:41,801 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 545.1ms TimeCoverageRelationStatistics Valid=740, Invalid=2016, Unknown=0, NotChecked=0, Total=2756 [2021-06-06 00:21:41,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11886 states. [2021-06-06 00:21:41,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11886 to 4493. [2021-06-06 00:21:41,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4493 states, 4492 states have (on average 3.610418521816563) internal successors, (16218), 4492 states have internal predecessors, (16218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:41,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4493 states to 4493 states and 16218 transitions. [2021-06-06 00:21:41,963 INFO L78 Accepts]: Start accepts. Automaton has 4493 states and 16218 transitions. Word has length 32 [2021-06-06 00:21:41,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:21:41,964 INFO L482 AbstractCegarLoop]: Abstraction has 4493 states and 16218 transitions. [2021-06-06 00:21:41,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:41,964 INFO L276 IsEmpty]: Start isEmpty. Operand 4493 states and 16218 transitions. [2021-06-06 00:21:41,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-06 00:21:41,970 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:21:41,970 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:21:42,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-06-06 00:21:42,171 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:21:42,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:21:42,171 INFO L82 PathProgramCache]: Analyzing trace with hash -338254510, now seen corresponding path program 20 times [2021-06-06 00:21:42,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:21:42,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615962138] [2021-06-06 00:21:42,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:21:42,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:21:42,218 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:21:42,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:21:42,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615962138] [2021-06-06 00:21:42,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615962138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:42,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044781268] [2021-06-06 00:21:42,219 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:21:42,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:21:42,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:21:42,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:21:42,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:21:42,381 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:21:42,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044781268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:42,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:21:42,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-06 00:21:42,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302871311] [2021-06-06 00:21:42,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:21:42,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:21:42,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:21:42,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:21:42,382 INFO L87 Difference]: Start difference. First operand 4493 states and 16218 transitions. Second operand has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:44,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:21:44,045 INFO L93 Difference]: Finished difference Result 12030 states and 39107 transitions. [2021-06-06 00:21:44,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-06-06 00:21:44,046 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-06 00:21:44,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:21:44,063 INFO L225 Difference]: With dead ends: 12030 [2021-06-06 00:21:44,064 INFO L226 Difference]: Without dead ends: 12026 [2021-06-06 00:21:44,064 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3145 ImplicationChecksByTransitivity, 1016.0ms TimeCoverageRelationStatistics Valid=1618, Invalid=7124, Unknown=0, NotChecked=0, Total=8742 [2021-06-06 00:21:44,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12026 states. [2021-06-06 00:21:44,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12026 to 4522. [2021-06-06 00:21:44,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4522 states, 4521 states have (on average 3.6051758460517584) internal successors, (16299), 4521 states have internal predecessors, (16299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:44,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4522 states to 4522 states and 16299 transitions. [2021-06-06 00:21:44,190 INFO L78 Accepts]: Start accepts. Automaton has 4522 states and 16299 transitions. Word has length 32 [2021-06-06 00:21:44,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:21:44,191 INFO L482 AbstractCegarLoop]: Abstraction has 4522 states and 16299 transitions. [2021-06-06 00:21:44,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:44,191 INFO L276 IsEmpty]: Start isEmpty. Operand 4522 states and 16299 transitions. [2021-06-06 00:21:44,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-06 00:21:44,198 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:21:44,198 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:21:44,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:21:44,411 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:21:44,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:21:44,411 INFO L82 PathProgramCache]: Analyzing trace with hash 956690446, now seen corresponding path program 21 times [2021-06-06 00:21:44,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:21:44,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698637153] [2021-06-06 00:21:44,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:21:44,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:21:44,456 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:44,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:21:44,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698637153] [2021-06-06 00:21:44,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698637153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:44,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816038929] [2021-06-06 00:21:44,456 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:21:44,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-06 00:21:44,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:21:44,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-06 00:21:44,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:21:44,607 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:44,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816038929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:44,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:21:44,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-06 00:21:44,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063479706] [2021-06-06 00:21:44,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:21:44,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:21:44,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:21:44,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:21:44,609 INFO L87 Difference]: Start difference. First operand 4522 states and 16299 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:45,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:21:45,812 INFO L93 Difference]: Finished difference Result 11020 states and 36349 transitions. [2021-06-06 00:21:45,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-06 00:21:45,812 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-06 00:21:45,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:21:45,861 INFO L225 Difference]: With dead ends: 11020 [2021-06-06 00:21:45,861 INFO L226 Difference]: Without dead ends: 10988 [2021-06-06 00:21:45,861 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1744 ImplicationChecksByTransitivity, 714.9ms TimeCoverageRelationStatistics Valid=1165, Invalid=4237, Unknown=0, NotChecked=0, Total=5402 [2021-06-06 00:21:45,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10988 states. [2021-06-06 00:21:45,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10988 to 4521. [2021-06-06 00:21:45,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4521 states, 4520 states have (on average 3.604424778761062) internal successors, (16292), 4520 states have internal predecessors, (16292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:45,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4521 states to 4521 states and 16292 transitions. [2021-06-06 00:21:45,968 INFO L78 Accepts]: Start accepts. Automaton has 4521 states and 16292 transitions. Word has length 32 [2021-06-06 00:21:45,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:21:45,968 INFO L482 AbstractCegarLoop]: Abstraction has 4521 states and 16292 transitions. [2021-06-06 00:21:45,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:45,968 INFO L276 IsEmpty]: Start isEmpty. Operand 4521 states and 16292 transitions. [2021-06-06 00:21:45,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-06 00:21:45,974 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:21:45,975 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:21:46,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-06-06 00:21:46,175 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:21:46,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:21:46,176 INFO L82 PathProgramCache]: Analyzing trace with hash 313112068, now seen corresponding path program 42 times [2021-06-06 00:21:46,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:21:46,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605428671] [2021-06-06 00:21:46,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:21:46,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:21:46,633 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:46,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:21:46,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605428671] [2021-06-06 00:21:46,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605428671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:46,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155479138] [2021-06-06 00:21:46,634 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:21:46,659 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:21:46,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:21:46,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-06 00:21:46,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:21:46,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-06-06 00:21:46,773 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:21:46,782 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:21:46,783 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-06 00:21:46,783 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:30 [2021-06-06 00:21:46,829 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-06-06 00:21:46,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-06 00:21:46,830 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:21:46,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:21:46,844 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-06 00:21:46,844 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:42 [2021-06-06 00:21:46,916 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-06-06 00:21:46,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2021-06-06 00:21:46,918 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:21:46,940 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:21:46,944 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-06 00:21:46,945 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:55, output treesize:54 [2021-06-06 00:21:47,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:21:47,102 INFO L354 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2021-06-06 00:21:47,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2021-06-06 00:21:47,104 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:21:47,128 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:21:47,133 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-06 00:21:47,133 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:58, output treesize:57 [2021-06-06 00:21:47,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:21:47,351 INFO L354 Elim1Store]: treesize reduction 64, result has 20.0 percent of original size [2021-06-06 00:21:47,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 38 [2021-06-06 00:21:47,353 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:21:47,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:21:47,380 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-06 00:21:47,381 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:64, output treesize:63 [2021-06-06 00:21:47,540 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:21:47,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155479138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:47,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:21:47,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2021-06-06 00:21:47,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277005126] [2021-06-06 00:21:47,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-06 00:21:47,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:21:47,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-06 00:21:47,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2021-06-06 00:21:47,541 INFO L87 Difference]: Start difference. First operand 4521 states and 16292 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:48,140 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 63 [2021-06-06 00:21:50,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:21:50,382 INFO L93 Difference]: Finished difference Result 6435 states and 22058 transitions. [2021-06-06 00:21:50,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-06 00:21:50,383 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-06 00:21:50,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:21:50,393 INFO L225 Difference]: With dead ends: 6435 [2021-06-06 00:21:50,393 INFO L226 Difference]: Without dead ends: 6256 [2021-06-06 00:21:50,394 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1196 ImplicationChecksByTransitivity, 2575.0ms TimeCoverageRelationStatistics Valid=509, Invalid=3397, Unknown=0, NotChecked=0, Total=3906 [2021-06-06 00:21:50,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6256 states. [2021-06-06 00:21:50,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6256 to 4629. [2021-06-06 00:21:50,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4629 states, 4628 states have (on average 3.6028522039757993) internal successors, (16674), 4628 states have internal predecessors, (16674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:50,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4629 states to 4629 states and 16674 transitions. [2021-06-06 00:21:50,471 INFO L78 Accepts]: Start accepts. Automaton has 4629 states and 16674 transitions. Word has length 32 [2021-06-06 00:21:50,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:21:50,472 INFO L482 AbstractCegarLoop]: Abstraction has 4629 states and 16674 transitions. [2021-06-06 00:21:50,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:50,472 INFO L276 IsEmpty]: Start isEmpty. Operand 4629 states and 16674 transitions. [2021-06-06 00:21:50,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-06 00:21:50,480 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:21:50,480 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:21:50,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:21:50,693 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:21:50,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:21:50,693 INFO L82 PathProgramCache]: Analyzing trace with hash 2029292164, now seen corresponding path program 43 times [2021-06-06 00:21:50,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:21:50,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693901799] [2021-06-06 00:21:50,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:21:50,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:21:51,161 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:51,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:21:51,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693901799] [2021-06-06 00:21:51,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693901799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:51,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098948883] [2021-06-06 00:21:51,161 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:21:51,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:21:51,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-06 00:21:51,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:21:51,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-06-06 00:21:51,288 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:21:51,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:21:51,298 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:21:51,298 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:28 [2021-06-06 00:21:51,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-06-06 00:21:51,326 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:21:51,336 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:21:51,337 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:21:51,337 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:35 [2021-06-06 00:21:51,384 INFO L354 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2021-06-06 00:21:51,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2021-06-06 00:21:51,385 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:21:51,398 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:21:51,411 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-06 00:21:51,411 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:47 [2021-06-06 00:21:51,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:21:51,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:21:51,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:21:51,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 33 [2021-06-06 00:21:51,552 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:21:51,563 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:21:51,567 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-06 00:21:51,567 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:42 [2021-06-06 00:21:51,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:21:51,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:21:51,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 33 [2021-06-06 00:21:51,646 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:21:51,659 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:21:51,662 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-06 00:21:51,663 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:47, output treesize:39 [2021-06-06 00:21:51,750 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:51,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098948883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:51,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:21:51,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2021-06-06 00:21:51,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68984412] [2021-06-06 00:21:51,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-06 00:21:51,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:21:51,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-06 00:21:51,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2021-06-06 00:21:51,752 INFO L87 Difference]: Start difference. First operand 4629 states and 16674 transitions. Second operand has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:53,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:21:53,344 INFO L93 Difference]: Finished difference Result 6469 states and 22175 transitions. [2021-06-06 00:21:53,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-06 00:21:53,344 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-06 00:21:53,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:21:53,354 INFO L225 Difference]: With dead ends: 6469 [2021-06-06 00:21:53,354 INFO L226 Difference]: Without dead ends: 6146 [2021-06-06 00:21:53,354 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 1678.7ms TimeCoverageRelationStatistics Valid=413, Invalid=1939, Unknown=0, NotChecked=0, Total=2352 [2021-06-06 00:21:53,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6146 states. [2021-06-06 00:21:53,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6146 to 4719. [2021-06-06 00:21:53,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4719 states, 4718 states have (on average 3.5938957185247986) internal successors, (16956), 4718 states have internal predecessors, (16956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:53,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4719 states to 4719 states and 16956 transitions. [2021-06-06 00:21:53,440 INFO L78 Accepts]: Start accepts. Automaton has 4719 states and 16956 transitions. Word has length 32 [2021-06-06 00:21:53,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:21:53,440 INFO L482 AbstractCegarLoop]: Abstraction has 4719 states and 16956 transitions. [2021-06-06 00:21:53,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:53,440 INFO L276 IsEmpty]: Start isEmpty. Operand 4719 states and 16956 transitions. [2021-06-06 00:21:53,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-06 00:21:53,446 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:21:53,446 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:21:53,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-06 00:21:53,647 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:21:53,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:21:53,647 INFO L82 PathProgramCache]: Analyzing trace with hash -500654400, now seen corresponding path program 44 times [2021-06-06 00:21:53,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:21:53,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345165358] [2021-06-06 00:21:53,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:21:53,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:21:54,150 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:54,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:21:54,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345165358] [2021-06-06 00:21:54,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345165358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:54,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423165160] [2021-06-06 00:21:54,150 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:21:54,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:21:54,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:21:54,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-06 00:21:54,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:21:54,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-06 00:21:54,284 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:21:54,293 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:21:54,293 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:21:54,293 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-06-06 00:21:54,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:21:54,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-06-06 00:21:54,331 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:21:54,345 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:21:54,346 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:21:54,346 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:41 [2021-06-06 00:21:54,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:21:54,404 INFO L354 Elim1Store]: treesize reduction 38, result has 25.5 percent of original size [2021-06-06 00:21:54,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 32 [2021-06-06 00:21:54,405 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:21:54,418 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:21:54,419 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-06 00:21:54,419 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:53 [2021-06-06 00:21:54,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:21:54,509 INFO L354 Elim1Store]: treesize reduction 35, result has 12.5 percent of original size [2021-06-06 00:21:54,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 37 [2021-06-06 00:21:54,511 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:21:54,528 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:21:54,532 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-06 00:21:54,532 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:61, output treesize:53 [2021-06-06 00:21:54,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:21:54,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:21:54,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:21:54,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:21:54,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:21:54,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 37 [2021-06-06 00:21:54,690 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:21:54,702 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:21:54,706 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-06 00:21:54,706 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:56, output treesize:48 [2021-06-06 00:21:54,783 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:54,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423165160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:54,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:21:54,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-06-06 00:21:54,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796769071] [2021-06-06 00:21:54,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-06 00:21:54,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:21:54,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-06 00:21:54,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2021-06-06 00:21:54,784 INFO L87 Difference]: Start difference. First operand 4719 states and 16956 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:55,152 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2021-06-06 00:21:55,943 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 41 [2021-06-06 00:21:56,332 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 71 [2021-06-06 00:21:57,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:21:57,512 INFO L93 Difference]: Finished difference Result 7571 states and 25578 transitions. [2021-06-06 00:21:57,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-06 00:21:57,513 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-06 00:21:57,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:21:57,524 INFO L225 Difference]: With dead ends: 7571 [2021-06-06 00:21:57,524 INFO L226 Difference]: Without dead ends: 7144 [2021-06-06 00:21:57,524 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1068 ImplicationChecksByTransitivity, 2642.9ms TimeCoverageRelationStatistics Valid=604, Invalid=2936, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:21:57,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7144 states. [2021-06-06 00:21:57,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7144 to 4997. [2021-06-06 00:21:57,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4997 states, 4996 states have (on average 3.5712570056044837) internal successors, (17842), 4996 states have internal predecessors, (17842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:57,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4997 states to 4997 states and 17842 transitions. [2021-06-06 00:21:57,604 INFO L78 Accepts]: Start accepts. Automaton has 4997 states and 17842 transitions. Word has length 32 [2021-06-06 00:21:57,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:21:57,604 INFO L482 AbstractCegarLoop]: Abstraction has 4997 states and 17842 transitions. [2021-06-06 00:21:57,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:57,604 INFO L276 IsEmpty]: Start isEmpty. Operand 4997 states and 17842 transitions. [2021-06-06 00:21:57,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-06 00:21:57,610 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:21:57,610 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:21:57,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-06 00:21:57,811 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:21:57,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:21:57,811 INFO L82 PathProgramCache]: Analyzing trace with hash 457173692, now seen corresponding path program 45 times [2021-06-06 00:21:57,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:21:57,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674148667] [2021-06-06 00:21:57,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:21:57,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:21:58,332 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:58,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:21:58,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674148667] [2021-06-06 00:21:58,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674148667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:58,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060421167] [2021-06-06 00:21:58,333 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:21:58,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-06 00:21:58,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:21:58,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-06 00:21:58,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:21:58,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-06-06 00:21:58,491 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:21:58,501 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:21:58,503 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-06 00:21:58,503 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:33 [2021-06-06 00:21:58,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:21:58,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-06-06 00:21:58,549 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:21:58,561 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:21:58,564 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-06 00:21:58,564 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:41, output treesize:40 [2021-06-06 00:21:58,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:21:58,635 INFO L354 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2021-06-06 00:21:58,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2021-06-06 00:21:58,637 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:21:58,652 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:21:58,656 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-06 00:21:58,656 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:53, output treesize:52 [2021-06-06 00:21:58,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:21:58,819 INFO L354 Elim1Store]: treesize reduction 64, result has 20.0 percent of original size [2021-06-06 00:21:58,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 38 [2021-06-06 00:21:58,827 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:21:58,847 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:21:58,852 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-06 00:21:58,852 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:68, output treesize:67 [2021-06-06 00:21:59,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:21:59,074 INFO L354 Elim1Store]: treesize reduction 104, result has 16.8 percent of original size [2021-06-06 00:21:59,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 37 treesize of output 48 [2021-06-06 00:21:59,076 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:21:59,097 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:21:59,103 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2021-06-06 00:21:59,104 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:76, output treesize:75 [2021-06-06 00:21:59,537 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:59,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060421167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:59,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:21:59,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-06-06 00:21:59,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692921232] [2021-06-06 00:21:59,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-06 00:21:59,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:21:59,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-06 00:21:59,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2021-06-06 00:21:59,538 INFO L87 Difference]: Start difference. First operand 4997 states and 17842 transitions. Second operand has 31 states, 31 states have (on average 2.0) internal successors, (62), 31 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:21:59,960 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 68 [2021-06-06 00:22:00,373 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 66 [2021-06-06 00:22:00,526 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 73 [2021-06-06 00:22:00,968 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 66 [2021-06-06 00:22:01,289 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 50 [2021-06-06 00:22:02,194 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 55 [2021-06-06 00:22:02,873 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 81 [2021-06-06 00:22:03,713 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 81 [2021-06-06 00:22:03,930 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 73 [2021-06-06 00:22:04,264 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 86 [2021-06-06 00:22:05,311 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 85 [2021-06-06 00:22:05,797 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 86 [2021-06-06 00:22:05,988 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 83 [2021-06-06 00:22:08,242 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2021-06-06 00:22:10,485 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 88 [2021-06-06 00:22:12,222 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 87 [2021-06-06 00:22:13,693 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 85 [2021-06-06 00:22:16,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:22:16,549 INFO L93 Difference]: Finished difference Result 7614 states and 26316 transitions. [2021-06-06 00:22:16,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-06 00:22:16,549 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 31 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-06 00:22:16,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:22:16,566 INFO L225 Difference]: With dead ends: 7614 [2021-06-06 00:22:16,566 INFO L226 Difference]: Without dead ends: 7468 [2021-06-06 00:22:16,567 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1908 ImplicationChecksByTransitivity, 6207.3ms TimeCoverageRelationStatistics Valid=951, Invalid=5369, Unknown=0, NotChecked=0, Total=6320 [2021-06-06 00:22:16,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7468 states. [2021-06-06 00:22:16,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7468 to 5655. [2021-06-06 00:22:16,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5655 states, 5654 states have (on average 3.5951538733639903) internal successors, (20327), 5654 states have internal predecessors, (20327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:16,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5655 states to 5655 states and 20327 transitions. [2021-06-06 00:22:16,672 INFO L78 Accepts]: Start accepts. Automaton has 5655 states and 20327 transitions. Word has length 32 [2021-06-06 00:22:16,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:22:16,673 INFO L482 AbstractCegarLoop]: Abstraction has 5655 states and 20327 transitions. [2021-06-06 00:22:16,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 31 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:16,673 INFO L276 IsEmpty]: Start isEmpty. Operand 5655 states and 20327 transitions. [2021-06-06 00:22:16,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-06 00:22:16,680 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:22:16,680 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:22:16,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-06 00:22:16,881 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:22:16,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:22:16,881 INFO L82 PathProgramCache]: Analyzing trace with hash 737661248, now seen corresponding path program 46 times [2021-06-06 00:22:16,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:22:16,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363731473] [2021-06-06 00:22:16,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:22:16,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:22:17,345 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:17,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:22:17,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363731473] [2021-06-06 00:22:17,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363731473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:17,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091391796] [2021-06-06 00:22:17,346 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:22:17,383 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:22:17,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:22:17,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-06 00:22:17,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:22:17,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-06 00:22:17,531 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:22:17,538 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:22:17,539 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:22:17,539 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-06-06 00:22:17,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:22:17,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-06-06 00:22:17,573 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:22:17,582 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:22:17,582 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:22:17,583 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-06-06 00:22:17,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:22:17,634 INFO L354 Elim1Store]: treesize reduction 38, result has 25.5 percent of original size [2021-06-06 00:22:17,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 32 [2021-06-06 00:22:17,645 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:22:17,657 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:22:17,659 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-06 00:22:17,659 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:48 [2021-06-06 00:22:17,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:22:17,718 INFO L354 Elim1Store]: treesize reduction 35, result has 12.5 percent of original size [2021-06-06 00:22:17,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 37 [2021-06-06 00:22:17,720 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:22:17,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:22:17,735 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-06 00:22:17,735 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:48 [2021-06-06 00:22:17,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:22:17,847 INFO L354 Elim1Store]: treesize reduction 72, result has 20.0 percent of original size [2021-06-06 00:22:17,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 42 [2021-06-06 00:22:17,848 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:22:17,864 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:22:17,867 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-06 00:22:17,868 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:61, output treesize:60 [2021-06-06 00:22:18,125 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:18,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091391796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:18,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:22:18,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-06-06 00:22:18,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722282605] [2021-06-06 00:22:18,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-06 00:22:18,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:22:18,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-06 00:22:18,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-06-06 00:22:18,126 INFO L87 Difference]: Start difference. First operand 5655 states and 20327 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:23,392 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 81 [2021-06-06 00:22:23,560 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 73 [2021-06-06 00:22:24,152 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 77 [2021-06-06 00:22:24,343 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 71 [2021-06-06 00:22:24,563 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 75 [2021-06-06 00:22:24,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:22:24,651 INFO L93 Difference]: Finished difference Result 9721 states and 32858 transitions. [2021-06-06 00:22:24,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-06 00:22:24,651 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-06 00:22:24,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:22:24,665 INFO L225 Difference]: With dead ends: 9721 [2021-06-06 00:22:24,665 INFO L226 Difference]: Without dead ends: 9341 [2021-06-06 00:22:24,666 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2164 ImplicationChecksByTransitivity, 5175.9ms TimeCoverageRelationStatistics Valid=1229, Invalid=6253, Unknown=0, NotChecked=0, Total=7482 [2021-06-06 00:22:24,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9341 states. [2021-06-06 00:22:24,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9341 to 5540. [2021-06-06 00:22:24,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5540 states, 5539 states have (on average 3.6270084852861526) internal successors, (20090), 5539 states have internal predecessors, (20090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:24,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5540 states to 5540 states and 20090 transitions. [2021-06-06 00:22:24,763 INFO L78 Accepts]: Start accepts. Automaton has 5540 states and 20090 transitions. Word has length 32 [2021-06-06 00:22:24,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:22:24,763 INFO L482 AbstractCegarLoop]: Abstraction has 5540 states and 20090 transitions. [2021-06-06 00:22:24,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:24,763 INFO L276 IsEmpty]: Start isEmpty. Operand 5540 states and 20090 transitions. [2021-06-06 00:22:24,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-06 00:22:24,771 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:22:24,771 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:22:24,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:22:24,971 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:22:24,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:22:24,972 INFO L82 PathProgramCache]: Analyzing trace with hash -2125295156, now seen corresponding path program 47 times [2021-06-06 00:22:24,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:22:24,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792154247] [2021-06-06 00:22:24,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:22:24,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:22:25,389 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:25,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:22:25,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792154247] [2021-06-06 00:22:25,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792154247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:25,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816210846] [2021-06-06 00:22:25,390 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:22:25,414 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:22:25,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:22:25,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-06 00:22:25,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:22:25,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-06-06 00:22:25,504 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:22:25,512 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:22:25,512 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:22:25,512 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:23 [2021-06-06 00:22:25,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-06-06 00:22:25,561 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:22:25,571 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:22:25,572 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:22:25,572 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-06-06 00:22:25,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-06-06 00:22:25,608 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:22:25,615 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:22:25,616 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:22:25,616 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:27 [2021-06-06 00:22:25,661 INFO L354 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2021-06-06 00:22:25,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2021-06-06 00:22:25,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:22:25,673 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:22:25,674 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-06 00:22:25,674 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:39 [2021-06-06 00:22:25,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:22:25,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:22:25,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:22:25,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 33 [2021-06-06 00:22:25,798 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:22:25,808 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:22:25,811 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-06 00:22:25,812 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:49, output treesize:41 [2021-06-06 00:22:25,907 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:25,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816210846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:25,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:22:25,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-06-06 00:22:25,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564735912] [2021-06-06 00:22:25,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-06 00:22:25,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:22:25,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-06 00:22:25,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=643, Unknown=0, NotChecked=0, Total=756 [2021-06-06 00:22:25,908 INFO L87 Difference]: Start difference. First operand 5540 states and 20090 transitions. Second operand has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:27,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:22:27,726 INFO L93 Difference]: Finished difference Result 8803 states and 30962 transitions. [2021-06-06 00:22:27,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-06 00:22:27,726 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-06 00:22:27,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:22:27,740 INFO L225 Difference]: With dead ends: 8803 [2021-06-06 00:22:27,740 INFO L226 Difference]: Without dead ends: 8465 [2021-06-06 00:22:27,741 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 960 ImplicationChecksByTransitivity, 1710.1ms TimeCoverageRelationStatistics Valid=462, Invalid=2844, Unknown=0, NotChecked=0, Total=3306 [2021-06-06 00:22:27,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8465 states. [2021-06-06 00:22:27,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8465 to 6862. [2021-06-06 00:22:27,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6862 states, 6861 states have (on average 3.6003498032356798) internal successors, (24702), 6861 states have internal predecessors, (24702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:27,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6862 states to 6862 states and 24702 transitions. [2021-06-06 00:22:27,848 INFO L78 Accepts]: Start accepts. Automaton has 6862 states and 24702 transitions. Word has length 32 [2021-06-06 00:22:27,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:22:27,848 INFO L482 AbstractCegarLoop]: Abstraction has 6862 states and 24702 transitions. [2021-06-06 00:22:27,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:27,848 INFO L276 IsEmpty]: Start isEmpty. Operand 6862 states and 24702 transitions. [2021-06-06 00:22:27,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-06 00:22:27,858 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:22:27,858 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:22:28,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-06 00:22:28,061 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:22:28,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:22:28,061 INFO L82 PathProgramCache]: Analyzing trace with hash -787029172, now seen corresponding path program 48 times [2021-06-06 00:22:28,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:22:28,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936169858] [2021-06-06 00:22:28,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:22:28,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:22:28,506 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:28,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:22:28,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936169858] [2021-06-06 00:22:28,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936169858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:28,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645833034] [2021-06-06 00:22:28,507 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:22:28,535 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-06 00:22:28,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:22:28,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-06 00:22:28,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:22:28,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-06-06 00:22:28,649 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:22:28,658 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:22:28,659 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-06 00:22:28,659 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:30 [2021-06-06 00:22:28,707 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-06-06 00:22:28,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-06 00:22:28,709 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:22:28,719 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:22:28,720 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-06 00:22:28,720 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:39 [2021-06-06 00:22:28,821 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-06-06 00:22:28,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2021-06-06 00:22:28,822 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:22:28,836 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:22:28,838 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-06 00:22:28,838 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:52, output treesize:51 [2021-06-06 00:22:28,921 INFO L354 Elim1Store]: treesize reduction 72, result has 18.2 percent of original size [2021-06-06 00:22:28,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 38 [2021-06-06 00:22:28,922 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:22:28,940 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:22:28,943 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-06 00:22:28,944 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:64, output treesize:63 [2021-06-06 00:22:29,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:22:29,066 INFO L354 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2021-06-06 00:22:29,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2021-06-06 00:22:29,067 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:22:29,079 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:22:29,083 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-06 00:22:29,083 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:47, output treesize:46 [2021-06-06 00:22:29,206 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:22:29,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645833034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:29,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:22:29,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2021-06-06 00:22:29,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791370979] [2021-06-06 00:22:29,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-06 00:22:29,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:22:29,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-06 00:22:29,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-06-06 00:22:29,207 INFO L87 Difference]: Start difference. First operand 6862 states and 24702 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:33,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:22:33,441 INFO L93 Difference]: Finished difference Result 10382 states and 35158 transitions. [2021-06-06 00:22:33,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-06 00:22:33,441 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-06 00:22:33,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:22:33,457 INFO L225 Difference]: With dead ends: 10382 [2021-06-06 00:22:33,458 INFO L226 Difference]: Without dead ends: 10079 [2021-06-06 00:22:33,458 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2404 ImplicationChecksByTransitivity, 3675.0ms TimeCoverageRelationStatistics Valid=964, Invalid=6518, Unknown=0, NotChecked=0, Total=7482 [2021-06-06 00:22:33,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10079 states. [2021-06-06 00:22:33,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10079 to 7386. [2021-06-06 00:22:33,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7386 states, 7385 states have (on average 3.6106973595125256) internal successors, (26665), 7385 states have internal predecessors, (26665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:33,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7386 states to 7386 states and 26665 transitions. [2021-06-06 00:22:33,634 INFO L78 Accepts]: Start accepts. Automaton has 7386 states and 26665 transitions. Word has length 32 [2021-06-06 00:22:33,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:22:33,634 INFO L482 AbstractCegarLoop]: Abstraction has 7386 states and 26665 transitions. [2021-06-06 00:22:33,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:33,635 INFO L276 IsEmpty]: Start isEmpty. Operand 7386 states and 26665 transitions. [2021-06-06 00:22:33,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-06 00:22:33,644 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:22:33,644 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:22:33,845 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:22:33,845 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:22:33,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:22:33,845 INFO L82 PathProgramCache]: Analyzing trace with hash -700345780, now seen corresponding path program 49 times [2021-06-06 00:22:33,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:22:33,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680618162] [2021-06-06 00:22:33,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:22:33,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:22:34,248 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:34,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:22:34,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680618162] [2021-06-06 00:22:34,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680618162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:34,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150645434] [2021-06-06 00:22:34,248 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:22:34,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:22:34,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-06 00:22:34,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:22:34,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-06-06 00:22:34,369 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:22:34,377 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:22:34,378 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-06 00:22:34,378 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:25 [2021-06-06 00:22:34,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:22:34,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-06-06 00:22:34,421 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:22:34,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:22:34,435 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-06 00:22:34,435 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:37 [2021-06-06 00:22:34,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:22:34,492 INFO L354 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2021-06-06 00:22:34,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2021-06-06 00:22:34,493 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:22:34,507 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:22:34,511 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-06 00:22:34,512 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:50, output treesize:49 [2021-06-06 00:22:34,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:22:34,593 INFO L354 Elim1Store]: treesize reduction 64, result has 20.0 percent of original size [2021-06-06 00:22:34,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 38 [2021-06-06 00:22:34,595 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:22:34,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:22:34,618 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-06 00:22:34,618 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:62, output treesize:61 [2021-06-06 00:22:34,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:22:34,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:22:34,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:22:34,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:22:34,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:22:34,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:22:34,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:22:34,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 38 [2021-06-06 00:22:34,833 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:22:34,865 INFO L628 ElimStorePlain]: treesize reduction 7, result has 88.9 percent of original size [2021-06-06 00:22:34,874 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-06 00:22:34,875 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:71, output treesize:51 [2021-06-06 00:22:35,086 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:35,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150645434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:35,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:22:35,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 27 [2021-06-06 00:22:35,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841675132] [2021-06-06 00:22:35,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-06 00:22:35,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:22:35,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-06 00:22:35,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2021-06-06 00:22:35,087 INFO L87 Difference]: Start difference. First operand 7386 states and 26665 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:35,944 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 49 [2021-06-06 00:22:37,499 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-06-06 00:22:38,779 WARN L205 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 55 [2021-06-06 00:22:42,240 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 59 [2021-06-06 00:22:46,251 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 68 [2021-06-06 00:22:48,834 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2021-06-06 00:22:50,028 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2021-06-06 00:22:51,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:22:51,614 INFO L93 Difference]: Finished difference Result 13949 states and 48004 transitions. [2021-06-06 00:22:51,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-06 00:22:51,614 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-06 00:22:51,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:22:51,636 INFO L225 Difference]: With dead ends: 13949 [2021-06-06 00:22:51,636 INFO L226 Difference]: Without dead ends: 12941 [2021-06-06 00:22:51,636 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1634 ImplicationChecksByTransitivity, 10134.0ms TimeCoverageRelationStatistics Valid=957, Invalid=4445, Unknown=0, NotChecked=0, Total=5402 [2021-06-06 00:22:51,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12941 states. [2021-06-06 00:22:51,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12941 to 9690. [2021-06-06 00:22:51,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9690 states, 9689 states have (on average 3.617297966766436) internal successors, (35048), 9689 states have internal predecessors, (35048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:51,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9690 states to 9690 states and 35048 transitions. [2021-06-06 00:22:51,797 INFO L78 Accepts]: Start accepts. Automaton has 9690 states and 35048 transitions. Word has length 32 [2021-06-06 00:22:51,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:22:51,797 INFO L482 AbstractCegarLoop]: Abstraction has 9690 states and 35048 transitions. [2021-06-06 00:22:51,798 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:51,798 INFO L276 IsEmpty]: Start isEmpty. Operand 9690 states and 35048 transitions. [2021-06-06 00:22:51,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-06 00:22:51,811 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:22:51,811 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:22:52,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-06-06 00:22:52,012 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:22:52,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:22:52,012 INFO L82 PathProgramCache]: Analyzing trace with hash -643597936, now seen corresponding path program 50 times [2021-06-06 00:22:52,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:22:52,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977998074] [2021-06-06 00:22:52,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:22:52,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:22:52,426 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:52,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:22:52,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977998074] [2021-06-06 00:22:52,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977998074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:52,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16306476] [2021-06-06 00:22:52,426 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:22:52,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:22:52,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:22:52,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-06 00:22:52,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:22:52,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-06-06 00:22:52,562 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:22:52,571 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:22:52,571 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:22:52,571 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-06 00:22:52,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-06-06 00:22:52,601 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:22:52,611 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:22:52,612 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:22:52,612 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:33 [2021-06-06 00:22:52,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-06-06 00:22:52,644 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:22:52,654 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:22:52,655 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:22:52,655 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:33 [2021-06-06 00:22:52,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 28 [2021-06-06 00:22:52,739 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:22:52,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:22:52,751 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:22:52,751 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:40 [2021-06-06 00:22:52,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:22:52,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:22:52,838 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-06-06 00:22:52,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 38 [2021-06-06 00:22:52,839 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:22:52,853 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:22:52,854 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:22:52,854 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:41 [2021-06-06 00:22:52,972 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:52,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16306476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:52,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:22:52,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-06-06 00:22:52,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310757120] [2021-06-06 00:22:52,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-06 00:22:52,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:22:52,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-06 00:22:52,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2021-06-06 00:22:52,973 INFO L87 Difference]: Start difference. First operand 9690 states and 35048 transitions. Second operand has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:54,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:22:54,067 INFO L93 Difference]: Finished difference Result 10881 states and 38680 transitions. [2021-06-06 00:22:54,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-06 00:22:54,067 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-06 00:22:54,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:22:54,087 INFO L225 Difference]: With dead ends: 10881 [2021-06-06 00:22:54,087 INFO L226 Difference]: Without dead ends: 10561 [2021-06-06 00:22:54,087 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 1184.5ms TimeCoverageRelationStatistics Valid=299, Invalid=1863, Unknown=0, NotChecked=0, Total=2162 [2021-06-06 00:22:54,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10561 states. [2021-06-06 00:22:54,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10561 to 9690. [2021-06-06 00:22:54,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9690 states, 9689 states have (on average 3.6100732789761585) internal successors, (34978), 9689 states have internal predecessors, (34978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:54,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9690 states to 9690 states and 34978 transitions. [2021-06-06 00:22:54,253 INFO L78 Accepts]: Start accepts. Automaton has 9690 states and 34978 transitions. Word has length 32 [2021-06-06 00:22:54,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:22:54,253 INFO L482 AbstractCegarLoop]: Abstraction has 9690 states and 34978 transitions. [2021-06-06 00:22:54,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:54,253 INFO L276 IsEmpty]: Start isEmpty. Operand 9690 states and 34978 transitions. [2021-06-06 00:22:54,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-06 00:22:54,267 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:22:54,267 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:22:54,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:22:54,468 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:22:54,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:22:54,468 INFO L82 PathProgramCache]: Analyzing trace with hash 42131912, now seen corresponding path program 51 times [2021-06-06 00:22:54,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:22:54,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516978485] [2021-06-06 00:22:54,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:22:54,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:22:54,864 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:54,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:22:54,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516978485] [2021-06-06 00:22:54,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516978485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:54,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931728486] [2021-06-06 00:22:54,865 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:22:54,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-06 00:22:54,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:22:54,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-06 00:22:54,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:22:54,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-06 00:22:54,965 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:22:54,971 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:22:54,972 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:22:54,972 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:24 [2021-06-06 00:22:54,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:22:54,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-06-06 00:22:54,998 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:22:55,004 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:22:55,005 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:22:55,005 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:28 [2021-06-06 00:22:55,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-06-06 00:22:55,031 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:22:55,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:22:55,037 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:22:55,037 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:24 [2021-06-06 00:22:55,079 INFO L354 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2021-06-06 00:22:55,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2021-06-06 00:22:55,080 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:22:55,089 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:22:55,090 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-06 00:22:55,090 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:36 [2021-06-06 00:22:55,150 INFO L354 Elim1Store]: treesize reduction 64, result has 20.0 percent of original size [2021-06-06 00:22:55,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 38 [2021-06-06 00:22:55,152 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:22:55,162 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:22:55,164 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-06 00:22:55,164 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:44, output treesize:43 [2021-06-06 00:22:55,253 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:22:55,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931728486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:55,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:22:55,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 24 [2021-06-06 00:22:55,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497110365] [2021-06-06 00:22:55,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-06 00:22:55,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:22:55,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-06 00:22:55,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-06-06 00:22:55,254 INFO L87 Difference]: Start difference. First operand 9690 states and 34978 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:56,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:22:56,275 INFO L93 Difference]: Finished difference Result 13901 states and 49107 transitions. [2021-06-06 00:22:56,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-06 00:22:56,275 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-06 00:22:56,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:22:56,299 INFO L225 Difference]: With dead ends: 13901 [2021-06-06 00:22:56,299 INFO L226 Difference]: Without dead ends: 13475 [2021-06-06 00:22:56,299 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 977.2ms TimeCoverageRelationStatistics Valid=282, Invalid=1358, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:22:56,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13475 states. [2021-06-06 00:22:56,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13475 to 8431. [2021-06-06 00:22:56,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8431 states, 8430 states have (on average 3.5896797153024913) internal successors, (30261), 8430 states have internal predecessors, (30261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:56,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8431 states to 8431 states and 30261 transitions. [2021-06-06 00:22:56,449 INFO L78 Accepts]: Start accepts. Automaton has 8431 states and 30261 transitions. Word has length 32 [2021-06-06 00:22:56,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:22:56,450 INFO L482 AbstractCegarLoop]: Abstraction has 8431 states and 30261 transitions. [2021-06-06 00:22:56,450 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:56,450 INFO L276 IsEmpty]: Start isEmpty. Operand 8431 states and 30261 transitions. [2021-06-06 00:22:56,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-06 00:22:56,461 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:22:56,461 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:22:56,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:22:56,665 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:22:56,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:22:56,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1250586420, now seen corresponding path program 52 times [2021-06-06 00:22:56,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:22:56,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476397051] [2021-06-06 00:22:56,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:22:56,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:22:57,077 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:57,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:22:57,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476397051] [2021-06-06 00:22:57,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476397051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:57,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399935291] [2021-06-06 00:22:57,077 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:22:57,102 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:22:57,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:22:57,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-06 00:22:57,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:22:57,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-06 00:22:57,218 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:22:57,226 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:22:57,227 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:22:57,227 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-06 00:22:57,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-06-06 00:22:57,254 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:22:57,263 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:22:57,264 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:22:57,264 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-06-06 00:22:57,308 INFO L354 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2021-06-06 00:22:57,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2021-06-06 00:22:57,310 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:22:57,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:22:57,323 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-06 00:22:57,323 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:44 [2021-06-06 00:22:57,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:22:57,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:22:57,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:22:57,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 33 [2021-06-06 00:22:57,408 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:22:57,418 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:22:57,420 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-06 00:22:57,420 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:47, output treesize:34 [2021-06-06 00:22:57,477 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:57,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399935291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:57,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:22:57,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 25 [2021-06-06 00:22:57,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314315852] [2021-06-06 00:22:57,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-06 00:22:57,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:22:57,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-06 00:22:57,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2021-06-06 00:22:57,478 INFO L87 Difference]: Start difference. First operand 8431 states and 30261 transitions. Second operand has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:58,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:22:58,140 INFO L93 Difference]: Finished difference Result 10312 states and 36179 transitions. [2021-06-06 00:22:58,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-06 00:22:58,140 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-06 00:22:58,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:22:58,156 INFO L225 Difference]: With dead ends: 10312 [2021-06-06 00:22:58,156 INFO L226 Difference]: Without dead ends: 10002 [2021-06-06 00:22:58,156 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 850.7ms TimeCoverageRelationStatistics Valid=241, Invalid=1241, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:22:58,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10002 states. [2021-06-06 00:22:58,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10002 to 8831. [2021-06-06 00:22:58,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8831 states, 8830 states have (on average 3.5691959229898074) internal successors, (31516), 8830 states have internal predecessors, (31516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:58,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8831 states to 8831 states and 31516 transitions. [2021-06-06 00:22:58,288 INFO L78 Accepts]: Start accepts. Automaton has 8831 states and 31516 transitions. Word has length 32 [2021-06-06 00:22:58,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:22:58,288 INFO L482 AbstractCegarLoop]: Abstraction has 8831 states and 31516 transitions. [2021-06-06 00:22:58,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:58,288 INFO L276 IsEmpty]: Start isEmpty. Operand 8831 states and 31516 transitions. [2021-06-06 00:22:58,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-06 00:22:58,301 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:22:58,301 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:22:58,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:22:58,501 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:22:58,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:22:58,501 INFO L82 PathProgramCache]: Analyzing trace with hash -564856572, now seen corresponding path program 53 times [2021-06-06 00:22:58,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:22:58,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755432691] [2021-06-06 00:22:58,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:22:58,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:22:58,879 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:58,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:22:58,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755432691] [2021-06-06 00:22:58,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755432691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:58,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986061245] [2021-06-06 00:22:58,879 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:22:58,903 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:22:58,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:22:58,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-06 00:22:58,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:22:58,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-06-06 00:22:58,976 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:22:58,981 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:22:58,982 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:22:58,982 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:17 [2021-06-06 00:22:59,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-06-06 00:22:59,006 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:22:59,012 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:22:59,012 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:22:59,012 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:24 [2021-06-06 00:22:59,055 INFO L354 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2021-06-06 00:22:59,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2021-06-06 00:22:59,058 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:22:59,067 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:22:59,068 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-06 00:22:59,068 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:36 [2021-06-06 00:22:59,157 INFO L354 Elim1Store]: treesize reduction 64, result has 20.0 percent of original size [2021-06-06 00:22:59,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 38 [2021-06-06 00:22:59,158 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:22:59,171 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:22:59,173 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-06 00:22:59,173 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:52, output treesize:51 [2021-06-06 00:22:59,398 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:59,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986061245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:59,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:22:59,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 26 [2021-06-06 00:22:59,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661355827] [2021-06-06 00:22:59,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-06 00:22:59,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:22:59,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-06 00:22:59,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-06-06 00:22:59,399 INFO L87 Difference]: Start difference. First operand 8831 states and 31516 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:01,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:23:01,073 INFO L93 Difference]: Finished difference Result 16437 states and 56867 transitions. [2021-06-06 00:23:01,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-06 00:23:01,074 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-06 00:23:01,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:23:01,102 INFO L225 Difference]: With dead ends: 16437 [2021-06-06 00:23:01,102 INFO L226 Difference]: Without dead ends: 15835 [2021-06-06 00:23:01,102 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 1373.5ms TimeCoverageRelationStatistics Valid=422, Invalid=2334, Unknown=0, NotChecked=0, Total=2756 [2021-06-06 00:23:01,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15835 states. [2021-06-06 00:23:01,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15835 to 8581. [2021-06-06 00:23:01,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8581 states, 8580 states have (on average 3.5440559440559443) internal successors, (30408), 8580 states have internal predecessors, (30408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:01,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8581 states to 8581 states and 30408 transitions. [2021-06-06 00:23:01,273 INFO L78 Accepts]: Start accepts. Automaton has 8581 states and 30408 transitions. Word has length 32 [2021-06-06 00:23:01,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:23:01,273 INFO L482 AbstractCegarLoop]: Abstraction has 8581 states and 30408 transitions. [2021-06-06 00:23:01,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:01,273 INFO L276 IsEmpty]: Start isEmpty. Operand 8581 states and 30408 transitions. [2021-06-06 00:23:01,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:23:01,285 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:23:01,285 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:23:01,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-06-06 00:23:01,486 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:23:01,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:23:01,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1781126392, now seen corresponding path program 54 times [2021-06-06 00:23:01,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:23:01,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790590786] [2021-06-06 00:23:01,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:23:01,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:01,554 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:01,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:23:01,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790590786] [2021-06-06 00:23:01,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790590786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:01,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463559011] [2021-06-06 00:23:01,555 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:23:01,579 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-06 00:23:01,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:23:01,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-06 00:23:01,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:23:01,740 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:23:01,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463559011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:01,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:23:01,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2021-06-06 00:23:01,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654477318] [2021-06-06 00:23:01,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-06 00:23:01,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:23:01,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-06 00:23:01,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:23:01,741 INFO L87 Difference]: Start difference. First operand 8581 states and 30408 transitions. Second operand has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:04,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:23:04,695 INFO L93 Difference]: Finished difference Result 24214 states and 79256 transitions. [2021-06-06 00:23:04,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2021-06-06 00:23:04,695 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:23:04,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:23:04,733 INFO L225 Difference]: With dead ends: 24214 [2021-06-06 00:23:04,733 INFO L226 Difference]: Without dead ends: 24214 [2021-06-06 00:23:04,734 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7207 ImplicationChecksByTransitivity, 1955.3ms TimeCoverageRelationStatistics Valid=3677, Invalid=15505, Unknown=0, NotChecked=0, Total=19182 [2021-06-06 00:23:04,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24214 states. [2021-06-06 00:23:04,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24214 to 9398. [2021-06-06 00:23:04,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9398 states, 9397 states have (on average 3.6118974140683195) internal successors, (33941), 9397 states have internal predecessors, (33941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:05,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9398 states to 9398 states and 33941 transitions. [2021-06-06 00:23:05,018 INFO L78 Accepts]: Start accepts. Automaton has 9398 states and 33941 transitions. Word has length 36 [2021-06-06 00:23:05,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:23:05,018 INFO L482 AbstractCegarLoop]: Abstraction has 9398 states and 33941 transitions. [2021-06-06 00:23:05,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:05,018 INFO L276 IsEmpty]: Start isEmpty. Operand 9398 states and 33941 transitions. [2021-06-06 00:23:05,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:23:05,030 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:23:05,031 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:23:05,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:23:05,231 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:23:05,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:23:05,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1765665596, now seen corresponding path program 55 times [2021-06-06 00:23:05,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:23:05,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592092915] [2021-06-06 00:23:05,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:23:05,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:05,299 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:05,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:23:05,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592092915] [2021-06-06 00:23:05,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592092915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:05,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56190517] [2021-06-06 00:23:05,300 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:23:05,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:05,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:23:05,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:23:05,506 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:05,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56190517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:05,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:23:05,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-06 00:23:05,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230739391] [2021-06-06 00:23:05,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-06 00:23:05,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:23:05,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-06 00:23:05,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:23:05,507 INFO L87 Difference]: Start difference. First operand 9398 states and 33941 transitions. Second operand has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:07,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:23:07,037 INFO L93 Difference]: Finished difference Result 23183 states and 75907 transitions. [2021-06-06 00:23:07,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-06 00:23:07,038 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:23:07,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:23:07,077 INFO L225 Difference]: With dead ends: 23183 [2021-06-06 00:23:07,077 INFO L226 Difference]: Without dead ends: 23183 [2021-06-06 00:23:07,078 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2349 ImplicationChecksByTransitivity, 933.9ms TimeCoverageRelationStatistics Valid=1560, Invalid=5246, Unknown=0, NotChecked=0, Total=6806 [2021-06-06 00:23:07,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23183 states. [2021-06-06 00:23:07,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23183 to 9263. [2021-06-06 00:23:07,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9263 states, 9262 states have (on average 3.587670049665299) internal successors, (33229), 9262 states have internal predecessors, (33229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:07,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9263 states to 9263 states and 33229 transitions. [2021-06-06 00:23:07,350 INFO L78 Accepts]: Start accepts. Automaton has 9263 states and 33229 transitions. Word has length 36 [2021-06-06 00:23:07,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:23:07,350 INFO L482 AbstractCegarLoop]: Abstraction has 9263 states and 33229 transitions. [2021-06-06 00:23:07,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:07,350 INFO L276 IsEmpty]: Start isEmpty. Operand 9263 states and 33229 transitions. [2021-06-06 00:23:07,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:23:07,363 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:23:07,363 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:23:07,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:23:07,563 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:23:07,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:23:07,564 INFO L82 PathProgramCache]: Analyzing trace with hash -610681024, now seen corresponding path program 56 times [2021-06-06 00:23:07,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:23:07,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054072963] [2021-06-06 00:23:07,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:23:07,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:07,639 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:07,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:23:07,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054072963] [2021-06-06 00:23:07,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054072963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:07,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537280813] [2021-06-06 00:23:07,639 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:23:07,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:23:07,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:23:07,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:23:07,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:23:07,819 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:07,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537280813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:07,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:23:07,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-06 00:23:07,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196239040] [2021-06-06 00:23:07,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:23:07,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:23:07,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:23:07,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:23:07,820 INFO L87 Difference]: Start difference. First operand 9263 states and 33229 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:08,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:23:08,862 INFO L93 Difference]: Finished difference Result 19614 states and 64898 transitions. [2021-06-06 00:23:08,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-06 00:23:08,863 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:23:08,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:23:08,896 INFO L225 Difference]: With dead ends: 19614 [2021-06-06 00:23:08,896 INFO L226 Difference]: Without dead ends: 19614 [2021-06-06 00:23:08,896 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1076 ImplicationChecksByTransitivity, 564.6ms TimeCoverageRelationStatistics Valid=763, Invalid=2777, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:23:08,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19614 states. [2021-06-06 00:23:09,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19614 to 9363. [2021-06-06 00:23:09,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9363 states, 9362 states have (on average 3.5803247169408245) internal successors, (33519), 9362 states have internal predecessors, (33519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:09,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9363 states to 9363 states and 33519 transitions. [2021-06-06 00:23:09,124 INFO L78 Accepts]: Start accepts. Automaton has 9363 states and 33519 transitions. Word has length 36 [2021-06-06 00:23:09,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:23:09,124 INFO L482 AbstractCegarLoop]: Abstraction has 9363 states and 33519 transitions. [2021-06-06 00:23:09,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:09,124 INFO L276 IsEmpty]: Start isEmpty. Operand 9363 states and 33519 transitions. [2021-06-06 00:23:09,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:23:09,136 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:23:09,136 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:23:09,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-06-06 00:23:09,336 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:23:09,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:23:09,337 INFO L82 PathProgramCache]: Analyzing trace with hash -2146021892, now seen corresponding path program 57 times [2021-06-06 00:23:09,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:23:09,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795008697] [2021-06-06 00:23:09,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:23:09,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:09,399 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:09,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:23:09,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795008697] [2021-06-06 00:23:09,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795008697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:09,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131050784] [2021-06-06 00:23:09,399 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:23:09,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-06 00:23:09,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:23:09,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-06 00:23:09,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:23:09,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-06-06 00:23:09,504 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:23:09,511 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:23:09,512 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-06 00:23:09,512 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:25 [2021-06-06 00:23:09,548 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-06-06 00:23:09,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-06 00:23:09,549 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:23:09,560 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:23:09,561 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-06 00:23:09,561 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:37 [2021-06-06 00:23:09,666 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-06-06 00:23:09,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2021-06-06 00:23:09,667 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:23:09,679 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:23:09,683 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-06 00:23:09,683 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:47, output treesize:46 [2021-06-06 00:23:09,785 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-06-06 00:23:09,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131050784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:09,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:23:09,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-06-06 00:23:09,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653622177] [2021-06-06 00:23:09,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-06 00:23:09,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:23:09,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-06 00:23:09,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-06-06 00:23:09,787 INFO L87 Difference]: Start difference. First operand 9363 states and 33519 transitions. Second operand has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:16,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:23:16,920 INFO L93 Difference]: Finished difference Result 23064 states and 74612 transitions. [2021-06-06 00:23:16,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2021-06-06 00:23:16,920 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:23:16,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:23:16,956 INFO L225 Difference]: With dead ends: 23064 [2021-06-06 00:23:16,956 INFO L226 Difference]: Without dead ends: 22846 [2021-06-06 00:23:16,957 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9982 ImplicationChecksByTransitivity, 3713.7ms TimeCoverageRelationStatistics Valid=3338, Invalid=23068, Unknown=0, NotChecked=0, Total=26406 [2021-06-06 00:23:16,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22846 states. [2021-06-06 00:23:17,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22846 to 10239. [2021-06-06 00:23:17,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10239 states, 10238 states have (on average 3.6391873412775935) internal successors, (37258), 10238 states have internal predecessors, (37258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:17,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10239 states to 10239 states and 37258 transitions. [2021-06-06 00:23:17,223 INFO L78 Accepts]: Start accepts. Automaton has 10239 states and 37258 transitions. Word has length 36 [2021-06-06 00:23:17,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:23:17,223 INFO L482 AbstractCegarLoop]: Abstraction has 10239 states and 37258 transitions. [2021-06-06 00:23:17,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:17,224 INFO L276 IsEmpty]: Start isEmpty. Operand 10239 states and 37258 transitions. [2021-06-06 00:23:17,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:23:17,238 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:23:17,238 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:23:17,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-06 00:23:17,438 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:23:17,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:23:17,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1242329482, now seen corresponding path program 58 times [2021-06-06 00:23:17,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:23:17,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383844558] [2021-06-06 00:23:17,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:23:17,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:17,489 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:17,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:23:17,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383844558] [2021-06-06 00:23:17,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383844558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:17,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880225474] [2021-06-06 00:23:17,489 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:23:17,513 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:23:17,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:23:17,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-06 00:23:17,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:23:17,666 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:23:17,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880225474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:17,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:23:17,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-06-06 00:23:17,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135100279] [2021-06-06 00:23:17,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:23:17,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:23:17,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:23:17,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:23:17,667 INFO L87 Difference]: Start difference. First operand 10239 states and 37258 transitions. Second operand has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:19,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:23:19,903 INFO L93 Difference]: Finished difference Result 24062 states and 79366 transitions. [2021-06-06 00:23:19,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-06-06 00:23:19,904 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:23:19,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:23:19,947 INFO L225 Difference]: With dead ends: 24062 [2021-06-06 00:23:19,947 INFO L226 Difference]: Without dead ends: 24054 [2021-06-06 00:23:19,948 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4827 ImplicationChecksByTransitivity, 1325.7ms TimeCoverageRelationStatistics Valid=2444, Invalid=10212, Unknown=0, NotChecked=0, Total=12656 [2021-06-06 00:23:19,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24054 states. [2021-06-06 00:23:20,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24054 to 10176. [2021-06-06 00:23:20,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10176 states, 10175 states have (on average 3.6354791154791153) internal successors, (36991), 10175 states have internal predecessors, (36991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:20,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10176 states to 10176 states and 36991 transitions. [2021-06-06 00:23:20,267 INFO L78 Accepts]: Start accepts. Automaton has 10176 states and 36991 transitions. Word has length 36 [2021-06-06 00:23:20,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:23:20,267 INFO L482 AbstractCegarLoop]: Abstraction has 10176 states and 36991 transitions. [2021-06-06 00:23:20,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:20,268 INFO L276 IsEmpty]: Start isEmpty. Operand 10176 states and 36991 transitions. [2021-06-06 00:23:20,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:23:20,282 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:23:20,282 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:23:20,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:23:20,483 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:23:20,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:23:20,483 INFO L82 PathProgramCache]: Analyzing trace with hash -999630980, now seen corresponding path program 59 times [2021-06-06 00:23:20,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:23:20,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022498344] [2021-06-06 00:23:20,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:23:20,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:20,534 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:20,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:23:20,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022498344] [2021-06-06 00:23:20,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022498344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:20,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949410649] [2021-06-06 00:23:20,535 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:23:20,570 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-06 00:23:20,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:23:20,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-06 00:23:20,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:23:20,760 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:23:20,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949410649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:20,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:23:20,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-06-06 00:23:20,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903524697] [2021-06-06 00:23:20,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:23:20,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:23:20,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:23:20,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:23:20,762 INFO L87 Difference]: Start difference. First operand 10176 states and 36991 transitions. Second operand has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:23,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:23:23,723 INFO L93 Difference]: Finished difference Result 27302 states and 90504 transitions. [2021-06-06 00:23:23,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2021-06-06 00:23:23,723 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:23:23,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:23:23,772 INFO L225 Difference]: With dead ends: 27302 [2021-06-06 00:23:23,773 INFO L226 Difference]: Without dead ends: 27302 [2021-06-06 00:23:23,774 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8677 ImplicationChecksByTransitivity, 2011.5ms TimeCoverageRelationStatistics Valid=3708, Invalid=17754, Unknown=0, NotChecked=0, Total=21462 [2021-06-06 00:23:23,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27302 states. [2021-06-06 00:23:24,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27302 to 10278. [2021-06-06 00:23:24,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10278 states, 10277 states have (on average 3.647562518244624) internal successors, (37486), 10277 states have internal predecessors, (37486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:24,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10278 states to 10278 states and 37486 transitions. [2021-06-06 00:23:24,140 INFO L78 Accepts]: Start accepts. Automaton has 10278 states and 37486 transitions. Word has length 36 [2021-06-06 00:23:24,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:23:24,140 INFO L482 AbstractCegarLoop]: Abstraction has 10278 states and 37486 transitions. [2021-06-06 00:23:24,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:24,140 INFO L276 IsEmpty]: Start isEmpty. Operand 10278 states and 37486 transitions. [2021-06-06 00:23:24,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:23:24,154 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:23:24,154 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:23:24,355 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:23:24,355 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:23:24,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:23:24,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1594791238, now seen corresponding path program 60 times [2021-06-06 00:23:24,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:23:24,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48515554] [2021-06-06 00:23:24,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:23:24,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:24,400 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:24,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:23:24,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48515554] [2021-06-06 00:23:24,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48515554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:24,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168870889] [2021-06-06 00:23:24,400 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:23:24,427 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-06 00:23:24,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:23:24,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:23:24,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:23:24,572 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:24,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168870889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:24,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:23:24,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2021-06-06 00:23:24,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942788227] [2021-06-06 00:23:24,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:23:24,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:23:24,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:23:24,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:23:24,573 INFO L87 Difference]: Start difference. First operand 10278 states and 37486 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:25,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:23:25,550 INFO L93 Difference]: Finished difference Result 23076 states and 77948 transitions. [2021-06-06 00:23:25,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-06 00:23:25,551 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:23:25,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:23:25,592 INFO L225 Difference]: With dead ends: 23076 [2021-06-06 00:23:25,592 INFO L226 Difference]: Without dead ends: 23064 [2021-06-06 00:23:25,592 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 907 ImplicationChecksByTransitivity, 539.3ms TimeCoverageRelationStatistics Valid=771, Invalid=2535, Unknown=0, NotChecked=0, Total=3306 [2021-06-06 00:23:25,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23064 states. [2021-06-06 00:23:25,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23064 to 10277. [2021-06-06 00:23:25,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10277 states, 10276 states have (on average 3.6474309069676916) internal successors, (37481), 10276 states have internal predecessors, (37481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:25,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10277 states to 10277 states and 37481 transitions. [2021-06-06 00:23:25,963 INFO L78 Accepts]: Start accepts. Automaton has 10277 states and 37481 transitions. Word has length 36 [2021-06-06 00:23:25,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:23:25,963 INFO L482 AbstractCegarLoop]: Abstraction has 10277 states and 37481 transitions. [2021-06-06 00:23:25,963 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:25,963 INFO L276 IsEmpty]: Start isEmpty. Operand 10277 states and 37481 transitions. [2021-06-06 00:23:25,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:23:25,978 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:23:25,978 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:23:26,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:23:26,179 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:23:26,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:23:26,179 INFO L82 PathProgramCache]: Analyzing trace with hash 619738612, now seen corresponding path program 61 times [2021-06-06 00:23:26,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:23:26,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176776380] [2021-06-06 00:23:26,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:23:26,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:26,251 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:26,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:23:26,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176776380] [2021-06-06 00:23:26,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176776380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:26,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787948938] [2021-06-06 00:23:26,251 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:23:26,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:26,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:23:26,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:23:26,466 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:26,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787948938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:26,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:23:26,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-06 00:23:26,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075997652] [2021-06-06 00:23:26,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:23:26,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:23:26,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:23:26,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:23:26,467 INFO L87 Difference]: Start difference. First operand 10277 states and 37481 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:27,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:23:27,269 INFO L93 Difference]: Finished difference Result 21184 states and 71447 transitions. [2021-06-06 00:23:27,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-06 00:23:27,270 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:23:27,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:23:27,308 INFO L225 Difference]: With dead ends: 21184 [2021-06-06 00:23:27,308 INFO L226 Difference]: Without dead ends: 21184 [2021-06-06 00:23:27,308 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 722 ImplicationChecksByTransitivity, 465.6ms TimeCoverageRelationStatistics Valid=579, Invalid=1971, Unknown=0, NotChecked=0, Total=2550 [2021-06-06 00:23:27,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21184 states. [2021-06-06 00:23:27,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21184 to 10309. [2021-06-06 00:23:27,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10309 states, 10308 states have (on average 3.646779200620877) internal successors, (37591), 10308 states have internal predecessors, (37591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:27,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10309 states to 10309 states and 37591 transitions. [2021-06-06 00:23:27,610 INFO L78 Accepts]: Start accepts. Automaton has 10309 states and 37591 transitions. Word has length 36 [2021-06-06 00:23:27,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:23:27,610 INFO L482 AbstractCegarLoop]: Abstraction has 10309 states and 37591 transitions. [2021-06-06 00:23:27,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:27,610 INFO L276 IsEmpty]: Start isEmpty. Operand 10309 states and 37591 transitions. [2021-06-06 00:23:27,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:23:27,626 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:23:27,626 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:23:27,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:23:27,826 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:23:27,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:23:27,827 INFO L82 PathProgramCache]: Analyzing trace with hash 334296516, now seen corresponding path program 62 times [2021-06-06 00:23:27,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:23:27,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228190426] [2021-06-06 00:23:27,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:23:27,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:27,882 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:27,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:23:27,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228190426] [2021-06-06 00:23:27,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228190426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:27,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063418182] [2021-06-06 00:23:27,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:23:27,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:23:27,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:23:27,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:23:27,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:23:28,067 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:28,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063418182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:28,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:23:28,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-06-06 00:23:28,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012109489] [2021-06-06 00:23:28,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:23:28,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:23:28,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:23:28,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:23:28,068 INFO L87 Difference]: Start difference. First operand 10309 states and 37591 transitions. Second operand has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 21 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:29,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:23:29,278 INFO L93 Difference]: Finished difference Result 22583 states and 75226 transitions. [2021-06-06 00:23:29,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-06 00:23:29,278 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 21 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:23:29,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:23:29,316 INFO L225 Difference]: With dead ends: 22583 [2021-06-06 00:23:29,317 INFO L226 Difference]: Without dead ends: 22583 [2021-06-06 00:23:29,317 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1627 ImplicationChecksByTransitivity, 749.7ms TimeCoverageRelationStatistics Valid=1128, Invalid=3984, Unknown=0, NotChecked=0, Total=5112 [2021-06-06 00:23:29,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22583 states. [2021-06-06 00:23:29,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22583 to 10288. [2021-06-06 00:23:29,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10288 states, 10287 states have (on average 3.621950034023525) internal successors, (37259), 10287 states have internal predecessors, (37259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:29,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10288 states to 10288 states and 37259 transitions. [2021-06-06 00:23:29,617 INFO L78 Accepts]: Start accepts. Automaton has 10288 states and 37259 transitions. Word has length 36 [2021-06-06 00:23:29,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:23:29,617 INFO L482 AbstractCegarLoop]: Abstraction has 10288 states and 37259 transitions. [2021-06-06 00:23:29,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 21 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:29,617 INFO L276 IsEmpty]: Start isEmpty. Operand 10288 states and 37259 transitions. [2021-06-06 00:23:29,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:23:29,633 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:23:29,633 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:23:29,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:23:29,833 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:23:29,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:23:29,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1645233024, now seen corresponding path program 63 times [2021-06-06 00:23:29,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:23:29,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771213696] [2021-06-06 00:23:29,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:23:29,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:29,890 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:29,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:23:29,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771213696] [2021-06-06 00:23:29,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771213696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:29,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83332498] [2021-06-06 00:23:29,891 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:23:29,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-06 00:23:29,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:23:29,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-06 00:23:29,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:23:30,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-06-06 00:23:30,032 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:23:30,038 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:23:30,039 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:23:30,039 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:22 [2021-06-06 00:23:30,071 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-06-06 00:23:30,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-06 00:23:30,073 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:23:30,082 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:23:30,083 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-06 00:23:30,083 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:34 [2021-06-06 00:23:30,161 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-06-06 00:23:30,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2021-06-06 00:23:30,162 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:23:30,176 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:23:30,178 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-06 00:23:30,178 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:49 [2021-06-06 00:23:30,328 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-06-06 00:23:30,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83332498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:30,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:23:30,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-06-06 00:23:30,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659981156] [2021-06-06 00:23:30,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-06 00:23:30,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:23:30,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-06 00:23:30,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-06-06 00:23:30,329 INFO L87 Difference]: Start difference. First operand 10288 states and 37259 transitions. Second operand has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:34,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:23:34,650 INFO L93 Difference]: Finished difference Result 20591 states and 67124 transitions. [2021-06-06 00:23:34,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-06-06 00:23:34,650 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:23:34,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:23:34,681 INFO L225 Difference]: With dead ends: 20591 [2021-06-06 00:23:34,681 INFO L226 Difference]: Without dead ends: 20576 [2021-06-06 00:23:34,682 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5098 ImplicationChecksByTransitivity, 2932.8ms TimeCoverageRelationStatistics Valid=1942, Invalid=12578, Unknown=0, NotChecked=0, Total=14520 [2021-06-06 00:23:34,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20576 states. [2021-06-06 00:23:34,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20576 to 11680. [2021-06-06 00:23:34,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11680 states, 11679 states have (on average 3.5503895881496703) internal successors, (41465), 11679 states have internal predecessors, (41465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:34,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11680 states to 11680 states and 41465 transitions. [2021-06-06 00:23:34,947 INFO L78 Accepts]: Start accepts. Automaton has 11680 states and 41465 transitions. Word has length 36 [2021-06-06 00:23:34,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:23:34,947 INFO L482 AbstractCegarLoop]: Abstraction has 11680 states and 41465 transitions. [2021-06-06 00:23:34,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:34,947 INFO L276 IsEmpty]: Start isEmpty. Operand 11680 states and 41465 transitions. [2021-06-06 00:23:34,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:23:34,963 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:23:34,963 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:23:35,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-06-06 00:23:35,163 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:23:35,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:23:35,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1594356878, now seen corresponding path program 64 times [2021-06-06 00:23:35,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:23:35,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579178250] [2021-06-06 00:23:35,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:23:35,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:35,222 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:35,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:23:35,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579178250] [2021-06-06 00:23:35,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579178250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:35,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224895838] [2021-06-06 00:23:35,222 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:23:35,249 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:23:35,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:23:35,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-06 00:23:35,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:23:35,413 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:23:35,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224895838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:35,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:23:35,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-06 00:23:35,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371984701] [2021-06-06 00:23:35,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-06 00:23:35,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:23:35,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-06 00:23:35,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-06-06 00:23:35,414 INFO L87 Difference]: Start difference. First operand 11680 states and 41465 transitions. Second operand has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:37,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:23:37,797 INFO L93 Difference]: Finished difference Result 24526 states and 80567 transitions. [2021-06-06 00:23:37,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-06-06 00:23:37,798 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:23:37,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:23:37,838 INFO L225 Difference]: With dead ends: 24526 [2021-06-06 00:23:37,838 INFO L226 Difference]: Without dead ends: 24518 [2021-06-06 00:23:37,839 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5034 ImplicationChecksByTransitivity, 1503.0ms TimeCoverageRelationStatistics Valid=2276, Invalid=11766, Unknown=0, NotChecked=0, Total=14042 [2021-06-06 00:23:37,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24518 states. [2021-06-06 00:23:38,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24518 to 10224. [2021-06-06 00:23:38,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10224 states, 10223 states have (on average 3.5769343636897193) internal successors, (36567), 10223 states have internal predecessors, (36567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:38,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10224 states to 10224 states and 36567 transitions. [2021-06-06 00:23:38,142 INFO L78 Accepts]: Start accepts. Automaton has 10224 states and 36567 transitions. Word has length 36 [2021-06-06 00:23:38,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:23:38,142 INFO L482 AbstractCegarLoop]: Abstraction has 10224 states and 36567 transitions. [2021-06-06 00:23:38,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:38,142 INFO L276 IsEmpty]: Start isEmpty. Operand 10224 states and 36567 transitions. [2021-06-06 00:23:38,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:23:38,156 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:23:38,156 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:23:38,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:23:38,357 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:23:38,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:23:38,357 INFO L82 PathProgramCache]: Analyzing trace with hash 649769798, now seen corresponding path program 22 times [2021-06-06 00:23:38,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:23:38,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251061133] [2021-06-06 00:23:38,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:23:38,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:38,406 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:38,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:23:38,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251061133] [2021-06-06 00:23:38,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251061133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:38,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538402777] [2021-06-06 00:23:38,406 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:23:38,430 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:23:38,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:23:38,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:23:38,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:23:38,574 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:38,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538402777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:38,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:23:38,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-06-06 00:23:38,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959712709] [2021-06-06 00:23:38,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:23:38,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:23:38,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:23:38,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:23:38,575 INFO L87 Difference]: Start difference. First operand 10224 states and 36567 transitions. Second operand has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:39,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:23:39,855 INFO L93 Difference]: Finished difference Result 23351 states and 75809 transitions. [2021-06-06 00:23:39,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-06 00:23:39,855 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:23:39,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:23:39,892 INFO L225 Difference]: With dead ends: 23351 [2021-06-06 00:23:39,892 INFO L226 Difference]: Without dead ends: 23351 [2021-06-06 00:23:39,893 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1978 ImplicationChecksByTransitivity, 770.3ms TimeCoverageRelationStatistics Valid=1338, Invalid=4514, Unknown=0, NotChecked=0, Total=5852 [2021-06-06 00:23:39,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23351 states. [2021-06-06 00:23:40,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23351 to 10314. [2021-06-06 00:23:40,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10314 states, 10313 states have (on average 3.570638999321245) internal successors, (36824), 10313 states have internal predecessors, (36824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:40,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10314 states to 10314 states and 36824 transitions. [2021-06-06 00:23:40,172 INFO L78 Accepts]: Start accepts. Automaton has 10314 states and 36824 transitions. Word has length 36 [2021-06-06 00:23:40,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:23:40,172 INFO L482 AbstractCegarLoop]: Abstraction has 10314 states and 36824 transitions. [2021-06-06 00:23:40,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:40,172 INFO L276 IsEmpty]: Start isEmpty. Operand 10314 states and 36824 transitions. [2021-06-06 00:23:40,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:23:40,187 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:23:40,187 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:23:40,387 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-06-06 00:23:40,387 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:23:40,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:23:40,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1914163660, now seen corresponding path program 23 times [2021-06-06 00:23:40,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:23:40,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154248209] [2021-06-06 00:23:40,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:23:40,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:40,448 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:40,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:23:40,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154248209] [2021-06-06 00:23:40,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154248209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:40,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421382444] [2021-06-06 00:23:40,448 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:23:40,479 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-06 00:23:40,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:23:40,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-06 00:23:40,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:23:40,631 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:23:40,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421382444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:40,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:23:40,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-06 00:23:40,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401402227] [2021-06-06 00:23:40,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:23:40,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:23:40,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:23:40,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:23:40,632 INFO L87 Difference]: Start difference. First operand 10314 states and 36824 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 21 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:44,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:23:44,083 INFO L93 Difference]: Finished difference Result 25345 states and 80932 transitions. [2021-06-06 00:23:44,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2021-06-06 00:23:44,084 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 21 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:23:44,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:23:44,133 INFO L225 Difference]: With dead ends: 25345 [2021-06-06 00:23:44,133 INFO L226 Difference]: Without dead ends: 25341 [2021-06-06 00:23:44,135 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12290 ImplicationChecksByTransitivity, 2452.2ms TimeCoverageRelationStatistics Valid=4827, Invalid=25275, Unknown=0, NotChecked=0, Total=30102 [2021-06-06 00:23:44,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25341 states. [2021-06-06 00:23:44,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25341 to 10697. [2021-06-06 00:23:44,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10697 states, 10696 states have (on average 3.5331899775617055) internal successors, (37791), 10696 states have internal predecessors, (37791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:44,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10697 states to 10697 states and 37791 transitions. [2021-06-06 00:23:44,459 INFO L78 Accepts]: Start accepts. Automaton has 10697 states and 37791 transitions. Word has length 36 [2021-06-06 00:23:44,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:23:44,459 INFO L482 AbstractCegarLoop]: Abstraction has 10697 states and 37791 transitions. [2021-06-06 00:23:44,459 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 21 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:44,459 INFO L276 IsEmpty]: Start isEmpty. Operand 10697 states and 37791 transitions. [2021-06-06 00:23:44,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:23:44,473 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:23:44,473 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:23:44,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-06-06 00:23:44,674 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:23:44,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:23:44,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1955379200, now seen corresponding path program 65 times [2021-06-06 00:23:44,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:23:44,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159969636] [2021-06-06 00:23:44,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:23:44,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:44,722 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:23:44,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:23:44,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159969636] [2021-06-06 00:23:44,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159969636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:44,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269297589] [2021-06-06 00:23:44,723 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:23:44,756 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-06 00:23:44,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:23:44,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:23:44,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:23:44,896 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:44,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269297589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:44,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:23:44,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-06 00:23:44,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948310179] [2021-06-06 00:23:44,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:23:44,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:23:44,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:23:44,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:23:44,901 INFO L87 Difference]: Start difference. First operand 10697 states and 37791 transitions. Second operand has 18 states, 18 states have (on average 3.5) internal successors, (63), 18 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:45,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:23:45,980 INFO L93 Difference]: Finished difference Result 28584 states and 95318 transitions. [2021-06-06 00:23:45,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-06 00:23:45,980 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 18 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:23:45,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:23:46,039 INFO L225 Difference]: With dead ends: 28584 [2021-06-06 00:23:46,039 INFO L226 Difference]: Without dead ends: 28584 [2021-06-06 00:23:46,039 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1334 ImplicationChecksByTransitivity, 581.5ms TimeCoverageRelationStatistics Valid=1025, Invalid=2757, Unknown=0, NotChecked=0, Total=3782 [2021-06-06 00:23:46,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28584 states. [2021-06-06 00:23:46,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28584 to 11040. [2021-06-06 00:23:46,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11040 states, 11039 states have (on average 3.5667179998188243) internal successors, (39373), 11039 states have internal predecessors, (39373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:46,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11040 states to 11040 states and 39373 transitions. [2021-06-06 00:23:46,407 INFO L78 Accepts]: Start accepts. Automaton has 11040 states and 39373 transitions. Word has length 36 [2021-06-06 00:23:46,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:23:46,407 INFO L482 AbstractCegarLoop]: Abstraction has 11040 states and 39373 transitions. [2021-06-06 00:23:46,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 18 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:46,407 INFO L276 IsEmpty]: Start isEmpty. Operand 11040 states and 39373 transitions. [2021-06-06 00:23:46,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:23:46,422 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:23:46,422 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:23:46,622 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:23:46,623 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:23:46,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:23:46,623 INFO L82 PathProgramCache]: Analyzing trace with hash 835382162, now seen corresponding path program 66 times [2021-06-06 00:23:46,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:23:46,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250372875] [2021-06-06 00:23:46,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:23:46,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:46,667 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:46,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:23:46,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250372875] [2021-06-06 00:23:46,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250372875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:46,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413957481] [2021-06-06 00:23:46,668 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:23:46,693 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-06 00:23:46,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:23:46,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-06 00:23:46,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:23:46,866 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:23:46,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413957481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:46,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:23:46,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-06-06 00:23:46,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846944431] [2021-06-06 00:23:46,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:23:46,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:23:46,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:23:46,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:23:46,868 INFO L87 Difference]: Start difference. First operand 11040 states and 39373 transitions. Second operand has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:49,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:23:49,089 INFO L93 Difference]: Finished difference Result 28065 states and 91868 transitions. [2021-06-06 00:23:49,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-06-06 00:23:49,090 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:23:49,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:23:49,150 INFO L225 Difference]: With dead ends: 28065 [2021-06-06 00:23:49,150 INFO L226 Difference]: Without dead ends: 28057 [2021-06-06 00:23:49,151 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4765 ImplicationChecksByTransitivity, 1412.9ms TimeCoverageRelationStatistics Valid=2261, Invalid=10171, Unknown=0, NotChecked=0, Total=12432 [2021-06-06 00:23:49,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28057 states. [2021-06-06 00:23:49,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28057 to 11031. [2021-06-06 00:23:49,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11031 states, 11030 states have (on average 3.565185856754306) internal successors, (39324), 11030 states have internal predecessors, (39324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:49,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11031 states to 11031 states and 39324 transitions. [2021-06-06 00:23:49,560 INFO L78 Accepts]: Start accepts. Automaton has 11031 states and 39324 transitions. Word has length 36 [2021-06-06 00:23:49,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:23:49,560 INFO L482 AbstractCegarLoop]: Abstraction has 11031 states and 39324 transitions. [2021-06-06 00:23:49,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:49,560 INFO L276 IsEmpty]: Start isEmpty. Operand 11031 states and 39324 transitions. [2021-06-06 00:23:49,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:23:49,576 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:23:49,576 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:23:49,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:23:49,776 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:23:49,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:23:49,777 INFO L82 PathProgramCache]: Analyzing trace with hash -645736056, now seen corresponding path program 67 times [2021-06-06 00:23:49,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:23:49,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558189988] [2021-06-06 00:23:49,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:23:49,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:49,831 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:49,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:23:49,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558189988] [2021-06-06 00:23:49,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558189988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:49,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814858485] [2021-06-06 00:23:49,831 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:23:49,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:49,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:23:49,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:23:50,004 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:50,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814858485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:50,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:23:50,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-06-06 00:23:50,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39642317] [2021-06-06 00:23:50,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:23:50,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:23:50,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:23:50,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:23:50,006 INFO L87 Difference]: Start difference. First operand 11031 states and 39324 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:51,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:23:51,339 INFO L93 Difference]: Finished difference Result 25852 states and 84621 transitions. [2021-06-06 00:23:51,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-06 00:23:51,346 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:23:51,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:23:51,394 INFO L225 Difference]: With dead ends: 25852 [2021-06-06 00:23:51,394 INFO L226 Difference]: Without dead ends: 25852 [2021-06-06 00:23:51,394 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1736 ImplicationChecksByTransitivity, 837.2ms TimeCoverageRelationStatistics Valid=1383, Invalid=4019, Unknown=0, NotChecked=0, Total=5402 [2021-06-06 00:23:51,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25852 states. [2021-06-06 00:23:51,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25852 to 11109. [2021-06-06 00:23:51,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11109 states, 11108 states have (on average 3.5620273676629455) internal successors, (39567), 11108 states have internal predecessors, (39567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:51,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11109 states to 11109 states and 39567 transitions. [2021-06-06 00:23:51,718 INFO L78 Accepts]: Start accepts. Automaton has 11109 states and 39567 transitions. Word has length 36 [2021-06-06 00:23:51,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:23:51,718 INFO L482 AbstractCegarLoop]: Abstraction has 11109 states and 39567 transitions. [2021-06-06 00:23:51,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:51,718 INFO L276 IsEmpty]: Start isEmpty. Operand 11109 states and 39567 transitions. [2021-06-06 00:23:51,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:23:51,734 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:23:51,734 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:23:51,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:23:51,935 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:23:51,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:23:51,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1701113450, now seen corresponding path program 68 times [2021-06-06 00:23:51,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:23:51,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60394076] [2021-06-06 00:23:51,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:23:51,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:52,070 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:52,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:23:52,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60394076] [2021-06-06 00:23:52,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60394076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:52,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188459994] [2021-06-06 00:23:52,070 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:23:52,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:23:52,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:23:52,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-06 00:23:52,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:23:52,291 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:23:52,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188459994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:52,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:23:52,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-06 00:23:52,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533964318] [2021-06-06 00:23:52,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:23:52,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:23:52,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:23:52,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:23:52,293 INFO L87 Difference]: Start difference. First operand 11109 states and 39567 transitions. Second operand has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:54,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:23:54,886 INFO L93 Difference]: Finished difference Result 26133 states and 85715 transitions. [2021-06-06 00:23:54,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-06-06 00:23:54,886 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:23:54,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:23:54,934 INFO L225 Difference]: With dead ends: 26133 [2021-06-06 00:23:54,935 INFO L226 Difference]: Without dead ends: 26125 [2021-06-06 00:23:54,936 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5792 ImplicationChecksByTransitivity, 1631.3ms TimeCoverageRelationStatistics Valid=2641, Invalid=12859, Unknown=0, NotChecked=0, Total=15500 [2021-06-06 00:23:54,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26125 states. [2021-06-06 00:23:55,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26125 to 10815. [2021-06-06 00:23:55,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10815 states, 10814 states have (on average 3.549935269095617) internal successors, (38389), 10814 states have internal predecessors, (38389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:55,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10815 states to 10815 states and 38389 transitions. [2021-06-06 00:23:55,258 INFO L78 Accepts]: Start accepts. Automaton has 10815 states and 38389 transitions. Word has length 36 [2021-06-06 00:23:55,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:23:55,258 INFO L482 AbstractCegarLoop]: Abstraction has 10815 states and 38389 transitions. [2021-06-06 00:23:55,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:55,259 INFO L276 IsEmpty]: Start isEmpty. Operand 10815 states and 38389 transitions. [2021-06-06 00:23:55,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:23:55,272 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:23:55,272 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:23:55,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable92 [2021-06-06 00:23:55,473 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:23:55,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:23:55,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1129408980, now seen corresponding path program 69 times [2021-06-06 00:23:55,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:23:55,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956447831] [2021-06-06 00:23:55,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:23:55,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:55,519 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:55,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:23:55,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956447831] [2021-06-06 00:23:55,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956447831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:55,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957041737] [2021-06-06 00:23:55,520 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:23:55,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-06 00:23:55,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:23:55,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:23:55,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:23:55,661 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:55,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957041737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:55,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:23:55,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-06 00:23:55,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98231887] [2021-06-06 00:23:55,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:23:55,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:23:55,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:23:55,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:23:55,662 INFO L87 Difference]: Start difference. First operand 10815 states and 38389 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:57,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:23:57,262 INFO L93 Difference]: Finished difference Result 25481 states and 83280 transitions. [2021-06-06 00:23:57,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-06-06 00:23:57,263 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:23:57,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:23:57,315 INFO L225 Difference]: With dead ends: 25481 [2021-06-06 00:23:57,315 INFO L226 Difference]: Without dead ends: 25421 [2021-06-06 00:23:57,316 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3412 ImplicationChecksByTransitivity, 983.4ms TimeCoverageRelationStatistics Valid=1884, Invalid=7622, Unknown=0, NotChecked=0, Total=9506 [2021-06-06 00:23:57,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25421 states. [2021-06-06 00:23:57,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25421 to 10825. [2021-06-06 00:23:57,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10825 states, 10824 states have (on average 3.5495195861049518) internal successors, (38420), 10824 states have internal predecessors, (38420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:57,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10825 states to 10825 states and 38420 transitions. [2021-06-06 00:23:57,664 INFO L78 Accepts]: Start accepts. Automaton has 10825 states and 38420 transitions. Word has length 36 [2021-06-06 00:23:57,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:23:57,664 INFO L482 AbstractCegarLoop]: Abstraction has 10825 states and 38420 transitions. [2021-06-06 00:23:57,664 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:57,664 INFO L276 IsEmpty]: Start isEmpty. Operand 10825 states and 38420 transitions. [2021-06-06 00:23:57,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:23:57,679 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:23:57,679 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:23:57,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:23:57,885 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:23:57,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:23:57,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1944063276, now seen corresponding path program 70 times [2021-06-06 00:23:57,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:23:57,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774607011] [2021-06-06 00:23:57,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:23:57,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:57,932 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:57,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:23:57,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774607011] [2021-06-06 00:23:57,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774607011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:57,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71530901] [2021-06-06 00:23:57,932 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:23:57,962 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:23:57,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:23:57,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:23:57,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:23:58,085 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:58,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71530901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:58,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:23:58,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-06 00:23:58,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574456997] [2021-06-06 00:23:58,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:23:58,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:23:58,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:23:58,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:23:58,086 INFO L87 Difference]: Start difference. First operand 10825 states and 38420 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:59,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:23:59,234 INFO L93 Difference]: Finished difference Result 25553 states and 83090 transitions. [2021-06-06 00:23:59,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-06 00:23:59,235 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:23:59,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:23:59,288 INFO L225 Difference]: With dead ends: 25553 [2021-06-06 00:23:59,288 INFO L226 Difference]: Without dead ends: 25553 [2021-06-06 00:23:59,289 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1685 ImplicationChecksByTransitivity, 646.2ms TimeCoverageRelationStatistics Valid=1205, Invalid=3625, Unknown=0, NotChecked=0, Total=4830 [2021-06-06 00:23:59,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25553 states. [2021-06-06 00:23:59,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25553 to 11156. [2021-06-06 00:23:59,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11156 states, 11155 states have (on average 3.528731510533393) internal successors, (39363), 11155 states have internal predecessors, (39363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:59,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11156 states to 11156 states and 39363 transitions. [2021-06-06 00:23:59,676 INFO L78 Accepts]: Start accepts. Automaton has 11156 states and 39363 transitions. Word has length 36 [2021-06-06 00:23:59,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:23:59,676 INFO L482 AbstractCegarLoop]: Abstraction has 11156 states and 39363 transitions. [2021-06-06 00:23:59,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:59,676 INFO L276 IsEmpty]: Start isEmpty. Operand 11156 states and 39363 transitions. [2021-06-06 00:23:59,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:23:59,691 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:23:59,691 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:23:59,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-06-06 00:23:59,892 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:23:59,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:23:59,892 INFO L82 PathProgramCache]: Analyzing trace with hash -417474388, now seen corresponding path program 71 times [2021-06-06 00:23:59,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:23:59,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696338539] [2021-06-06 00:23:59,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:23:59,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:59,940 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:59,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:23:59,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696338539] [2021-06-06 00:23:59,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696338539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:59,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285806858] [2021-06-06 00:23:59,940 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:23:59,969 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-06 00:23:59,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:23:59,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:23:59,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:24:00,109 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:00,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285806858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:00,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:24:00,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-06-06 00:24:00,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919638785] [2021-06-06 00:24:00,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:24:00,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:24:00,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:24:00,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:24:00,110 INFO L87 Difference]: Start difference. First operand 11156 states and 39363 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:01,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:24:01,841 INFO L93 Difference]: Finished difference Result 24060 states and 79445 transitions. [2021-06-06 00:24:01,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-06-06 00:24:01,842 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:24:01,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:24:01,882 INFO L225 Difference]: With dead ends: 24060 [2021-06-06 00:24:01,882 INFO L226 Difference]: Without dead ends: 23988 [2021-06-06 00:24:01,883 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3341 ImplicationChecksByTransitivity, 1081.7ms TimeCoverageRelationStatistics Valid=1989, Invalid=7323, Unknown=0, NotChecked=0, Total=9312 [2021-06-06 00:24:01,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23988 states. [2021-06-06 00:24:02,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23988 to 11635. [2021-06-06 00:24:02,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11635 states, 11634 states have (on average 3.5373044524669073) internal successors, (41153), 11634 states have internal predecessors, (41153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:02,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11635 states to 11635 states and 41153 transitions. [2021-06-06 00:24:02,204 INFO L78 Accepts]: Start accepts. Automaton has 11635 states and 41153 transitions. Word has length 36 [2021-06-06 00:24:02,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:24:02,204 INFO L482 AbstractCegarLoop]: Abstraction has 11635 states and 41153 transitions. [2021-06-06 00:24:02,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:02,204 INFO L276 IsEmpty]: Start isEmpty. Operand 11635 states and 41153 transitions. [2021-06-06 00:24:02,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:24:02,222 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:24:02,222 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:24:02,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:24:02,434 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:24:02,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:24:02,434 INFO L82 PathProgramCache]: Analyzing trace with hash -56872508, now seen corresponding path program 72 times [2021-06-06 00:24:02,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:24:02,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684324016] [2021-06-06 00:24:02,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:24:02,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:02,477 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:24:02,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:24:02,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684324016] [2021-06-06 00:24:02,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684324016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:02,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377814420] [2021-06-06 00:24:02,477 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:24:02,507 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-06 00:24:02,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:24:02,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-06 00:24:02,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:24:02,746 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:02,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377814420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:02,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:24:02,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-06-06 00:24:02,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069867082] [2021-06-06 00:24:02,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:24:02,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:24:02,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:24:02,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:24:02,747 INFO L87 Difference]: Start difference. First operand 11635 states and 41153 transitions. Second operand has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:05,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:24:05,276 INFO L93 Difference]: Finished difference Result 32188 states and 105890 transitions. [2021-06-06 00:24:05,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2021-06-06 00:24:05,277 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:24:05,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:24:05,340 INFO L225 Difference]: With dead ends: 32188 [2021-06-06 00:24:05,340 INFO L226 Difference]: Without dead ends: 32188 [2021-06-06 00:24:05,342 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7629 ImplicationChecksByTransitivity, 1736.2ms TimeCoverageRelationStatistics Valid=3449, Invalid=15183, Unknown=0, NotChecked=0, Total=18632 [2021-06-06 00:24:05,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32188 states. [2021-06-06 00:24:05,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32188 to 11859. [2021-06-06 00:24:05,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11859 states, 11858 states have (on average 3.5428402766065106) internal successors, (42011), 11858 states have internal predecessors, (42011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:05,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11859 states to 11859 states and 42011 transitions. [2021-06-06 00:24:05,745 INFO L78 Accepts]: Start accepts. Automaton has 11859 states and 42011 transitions. Word has length 36 [2021-06-06 00:24:05,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:24:05,746 INFO L482 AbstractCegarLoop]: Abstraction has 11859 states and 42011 transitions. [2021-06-06 00:24:05,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:05,746 INFO L276 IsEmpty]: Start isEmpty. Operand 11859 states and 42011 transitions. [2021-06-06 00:24:05,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:24:05,762 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:24:05,762 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:24:05,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:24:05,962 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:24:05,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:24:05,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1328456694, now seen corresponding path program 73 times [2021-06-06 00:24:05,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:24:05,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731362232] [2021-06-06 00:24:05,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:24:05,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:06,044 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:06,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:24:06,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731362232] [2021-06-06 00:24:06,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731362232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:06,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119681094] [2021-06-06 00:24:06,044 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:24:06,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:06,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:24:06,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:24:06,377 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:06,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119681094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:06,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:24:06,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-06-06 00:24:06,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439823498] [2021-06-06 00:24:06,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:24:06,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:24:06,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:24:06,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:24:06,378 INFO L87 Difference]: Start difference. First operand 11859 states and 42011 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:07,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:24:07,386 INFO L93 Difference]: Finished difference Result 21337 states and 71691 transitions. [2021-06-06 00:24:07,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-06 00:24:07,386 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:24:07,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:24:07,442 INFO L225 Difference]: With dead ends: 21337 [2021-06-06 00:24:07,442 INFO L226 Difference]: Without dead ends: 21337 [2021-06-06 00:24:07,443 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 957 ImplicationChecksByTransitivity, 669.8ms TimeCoverageRelationStatistics Valid=705, Invalid=2375, Unknown=0, NotChecked=0, Total=3080 [2021-06-06 00:24:07,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21337 states. [2021-06-06 00:24:07,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21337 to 12014. [2021-06-06 00:24:07,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12014 states, 12013 states have (on average 3.539082660451178) internal successors, (42515), 12013 states have internal predecessors, (42515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:07,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12014 states to 12014 states and 42515 transitions. [2021-06-06 00:24:07,754 INFO L78 Accepts]: Start accepts. Automaton has 12014 states and 42515 transitions. Word has length 36 [2021-06-06 00:24:07,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:24:07,755 INFO L482 AbstractCegarLoop]: Abstraction has 12014 states and 42515 transitions. [2021-06-06 00:24:07,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:07,755 INFO L276 IsEmpty]: Start isEmpty. Operand 12014 states and 42515 transitions. [2021-06-06 00:24:07,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:24:07,770 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:24:07,771 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:24:07,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-06-06 00:24:07,992 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:24:07,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:24:07,992 INFO L82 PathProgramCache]: Analyzing trace with hash -757061290, now seen corresponding path program 74 times [2021-06-06 00:24:07,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:24:07,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734402949] [2021-06-06 00:24:07,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:24:07,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:08,044 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:08,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:24:08,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734402949] [2021-06-06 00:24:08,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734402949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:08,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071479911] [2021-06-06 00:24:08,044 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:24:08,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:24:08,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:24:08,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-06 00:24:08,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:24:08,210 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:24:08,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071479911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:08,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:24:08,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-06-06 00:24:08,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049354379] [2021-06-06 00:24:08,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:24:08,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:24:08,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:24:08,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:24:08,211 INFO L87 Difference]: Start difference. First operand 12014 states and 42515 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:09,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:24:09,997 INFO L93 Difference]: Finished difference Result 23584 states and 78972 transitions. [2021-06-06 00:24:09,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-06-06 00:24:09,998 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:24:09,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:24:10,040 INFO L225 Difference]: With dead ends: 23584 [2021-06-06 00:24:10,040 INFO L226 Difference]: Without dead ends: 23568 [2021-06-06 00:24:10,041 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4149 ImplicationChecksByTransitivity, 1173.5ms TimeCoverageRelationStatistics Valid=2031, Invalid=9311, Unknown=0, NotChecked=0, Total=11342 [2021-06-06 00:24:10,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23568 states. [2021-06-06 00:24:10,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23568 to 12014. [2021-06-06 00:24:10,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12014 states, 12013 states have (on average 3.5387496878381755) internal successors, (42511), 12013 states have internal predecessors, (42511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:10,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12014 states to 12014 states and 42511 transitions. [2021-06-06 00:24:10,343 INFO L78 Accepts]: Start accepts. Automaton has 12014 states and 42511 transitions. Word has length 36 [2021-06-06 00:24:10,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:24:10,343 INFO L482 AbstractCegarLoop]: Abstraction has 12014 states and 42511 transitions. [2021-06-06 00:24:10,343 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:10,344 INFO L276 IsEmpty]: Start isEmpty. Operand 12014 states and 42511 transitions. [2021-06-06 00:24:10,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:24:10,361 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:24:10,361 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:24:10,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:24:10,562 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:24:10,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:24:10,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1893700292, now seen corresponding path program 24 times [2021-06-06 00:24:10,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:24:10,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291188189] [2021-06-06 00:24:10,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:24:10,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:10,698 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:24:10,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:24:10,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291188189] [2021-06-06 00:24:10,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291188189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:10,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501792259] [2021-06-06 00:24:10,699 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:24:10,723 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-06 00:24:10,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:24:10,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-06 00:24:10,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:24:10,876 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:24:10,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501792259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:10,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:24:10,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-06 00:24:10,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800713526] [2021-06-06 00:24:10,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:24:10,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:24:10,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:24:10,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:24:10,877 INFO L87 Difference]: Start difference. First operand 12014 states and 42511 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:14,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:24:14,675 INFO L93 Difference]: Finished difference Result 24185 states and 80281 transitions. [2021-06-06 00:24:14,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 188 states. [2021-06-06 00:24:14,676 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:24:14,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:24:14,719 INFO L225 Difference]: With dead ends: 24185 [2021-06-06 00:24:14,719 INFO L226 Difference]: Without dead ends: 24161 [2021-06-06 00:24:14,722 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15417 ImplicationChecksByTransitivity, 2827.2ms TimeCoverageRelationStatistics Valid=5544, Invalid=31128, Unknown=0, NotChecked=0, Total=36672 [2021-06-06 00:24:14,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24161 states. [2021-06-06 00:24:14,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24161 to 12318. [2021-06-06 00:24:15,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12318 states, 12317 states have (on average 3.522935779816514) internal successors, (43392), 12317 states have internal predecessors, (43392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:15,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12318 states to 12318 states and 43392 transitions. [2021-06-06 00:24:15,033 INFO L78 Accepts]: Start accepts. Automaton has 12318 states and 43392 transitions. Word has length 36 [2021-06-06 00:24:15,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:24:15,033 INFO L482 AbstractCegarLoop]: Abstraction has 12318 states and 43392 transitions. [2021-06-06 00:24:15,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:15,033 INFO L276 IsEmpty]: Start isEmpty. Operand 12318 states and 43392 transitions. [2021-06-06 00:24:15,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:24:15,049 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:24:15,049 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:24:15,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:24:15,249 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:24:15,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:24:15,249 INFO L82 PathProgramCache]: Analyzing trace with hash 14650632, now seen corresponding path program 75 times [2021-06-06 00:24:15,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:24:15,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482839107] [2021-06-06 00:24:15,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:24:15,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:15,377 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:15,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:24:15,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482839107] [2021-06-06 00:24:15,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482839107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:15,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504141755] [2021-06-06 00:24:15,378 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:24:15,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-06 00:24:15,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:24:15,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:24:15,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:24:15,538 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:15,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504141755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:15,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:24:15,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-06-06 00:24:15,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585929265] [2021-06-06 00:24:15,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:24:15,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:24:15,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:24:15,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:24:15,539 INFO L87 Difference]: Start difference. First operand 12318 states and 43392 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:16,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:24:16,588 INFO L93 Difference]: Finished difference Result 30224 states and 99175 transitions. [2021-06-06 00:24:16,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-06 00:24:16,588 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:24:16,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:24:16,642 INFO L225 Difference]: With dead ends: 30224 [2021-06-06 00:24:16,642 INFO L226 Difference]: Without dead ends: 30224 [2021-06-06 00:24:16,643 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1168 ImplicationChecksByTransitivity, 695.8ms TimeCoverageRelationStatistics Valid=959, Invalid=2701, Unknown=0, NotChecked=0, Total=3660 [2021-06-06 00:24:16,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30224 states. [2021-06-06 00:24:16,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30224 to 13376. [2021-06-06 00:24:17,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13376 states, 13375 states have (on average 3.5404859813084113) internal successors, (47354), 13375 states have internal predecessors, (47354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:17,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13376 states to 13376 states and 47354 transitions. [2021-06-06 00:24:17,037 INFO L78 Accepts]: Start accepts. Automaton has 13376 states and 47354 transitions. Word has length 36 [2021-06-06 00:24:17,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:24:17,037 INFO L482 AbstractCegarLoop]: Abstraction has 13376 states and 47354 transitions. [2021-06-06 00:24:17,037 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:17,037 INFO L276 IsEmpty]: Start isEmpty. Operand 13376 states and 47354 transitions. [2021-06-06 00:24:17,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:24:17,057 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:24:17,057 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:24:17,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-06-06 00:24:17,257 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:24:17,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:24:17,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1040726762, now seen corresponding path program 76 times [2021-06-06 00:24:17,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:24:17,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573461585] [2021-06-06 00:24:17,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:24:17,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:17,312 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:17,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:24:17,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573461585] [2021-06-06 00:24:17,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573461585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:17,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574730853] [2021-06-06 00:24:17,313 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:24:17,341 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:24:17,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:24:17,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-06 00:24:17,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:24:17,465 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:24:17,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574730853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:17,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:24:17,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-06-06 00:24:17,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57643283] [2021-06-06 00:24:17,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:24:17,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:24:17,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:24:17,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:24:17,466 INFO L87 Difference]: Start difference. First operand 13376 states and 47354 transitions. Second operand has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:20,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:24:20,012 INFO L93 Difference]: Finished difference Result 31957 states and 103754 transitions. [2021-06-06 00:24:20,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2021-06-06 00:24:20,012 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:24:20,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:24:20,068 INFO L225 Difference]: With dead ends: 31957 [2021-06-06 00:24:20,068 INFO L226 Difference]: Without dead ends: 31941 [2021-06-06 00:24:20,069 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7670 ImplicationChecksByTransitivity, 1813.0ms TimeCoverageRelationStatistics Valid=3631, Invalid=15551, Unknown=0, NotChecked=0, Total=19182 [2021-06-06 00:24:20,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31941 states. [2021-06-06 00:24:20,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31941 to 12804. [2021-06-06 00:24:20,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12804 states, 12803 states have (on average 3.5590096071233304) internal successors, (45566), 12803 states have internal predecessors, (45566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:20,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12804 states to 12804 states and 45566 transitions. [2021-06-06 00:24:20,469 INFO L78 Accepts]: Start accepts. Automaton has 12804 states and 45566 transitions. Word has length 36 [2021-06-06 00:24:20,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:24:20,469 INFO L482 AbstractCegarLoop]: Abstraction has 12804 states and 45566 transitions. [2021-06-06 00:24:20,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:20,469 INFO L276 IsEmpty]: Start isEmpty. Operand 12804 states and 45566 transitions. [2021-06-06 00:24:20,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:24:20,489 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:24:20,489 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:24:20,690 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-06 00:24:20,690 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:24:20,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:24:20,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1670020454, now seen corresponding path program 77 times [2021-06-06 00:24:20,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:24:20,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127465108] [2021-06-06 00:24:20,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:24:20,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:20,747 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:20,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:24:20,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127465108] [2021-06-06 00:24:20,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127465108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:20,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478581757] [2021-06-06 00:24:20,747 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:24:20,774 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-06 00:24:20,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:24:20,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-06 00:24:20,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:24:20,889 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:24:20,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478581757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:20,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:24:20,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-06-06 00:24:20,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289696366] [2021-06-06 00:24:20,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:24:20,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:24:20,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:24:20,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:24:20,890 INFO L87 Difference]: Start difference. First operand 12804 states and 45566 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:22,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:24:22,753 INFO L93 Difference]: Finished difference Result 29035 states and 95366 transitions. [2021-06-06 00:24:22,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-06-06 00:24:22,754 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:24:22,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:24:22,806 INFO L225 Difference]: With dead ends: 29035 [2021-06-06 00:24:22,806 INFO L226 Difference]: Without dead ends: 28951 [2021-06-06 00:24:22,807 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4298 ImplicationChecksByTransitivity, 1212.0ms TimeCoverageRelationStatistics Valid=2386, Invalid=8956, Unknown=0, NotChecked=0, Total=11342 [2021-06-06 00:24:22,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28951 states. [2021-06-06 00:24:23,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28951 to 12660. [2021-06-06 00:24:23,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12660 states, 12659 states have (on average 3.5663164546962633) internal successors, (45146), 12659 states have internal predecessors, (45146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:23,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12660 states to 12660 states and 45146 transitions. [2021-06-06 00:24:23,267 INFO L78 Accepts]: Start accepts. Automaton has 12660 states and 45146 transitions. Word has length 36 [2021-06-06 00:24:23,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:24:23,267 INFO L482 AbstractCegarLoop]: Abstraction has 12660 states and 45146 transitions. [2021-06-06 00:24:23,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:23,267 INFO L276 IsEmpty]: Start isEmpty. Operand 12660 states and 45146 transitions. [2021-06-06 00:24:23,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:24:23,286 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:24:23,286 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:24:23,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-06 00:24:23,487 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:24:23,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:24:23,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1988479988, now seen corresponding path program 78 times [2021-06-06 00:24:23,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:24:23,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18554609] [2021-06-06 00:24:23,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:24:23,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:23,562 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:23,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:24:23,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18554609] [2021-06-06 00:24:23,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18554609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:23,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183966082] [2021-06-06 00:24:23,562 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:24:23,594 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-06 00:24:23,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:24:23,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-06 00:24:23,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:24:23,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-06 00:24:23,788 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:24:23,795 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:24:23,796 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:24:23,796 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:21 [2021-06-06 00:24:23,834 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-06-06 00:24:23,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2021-06-06 00:24:23,836 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:24:23,843 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:24:23,844 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:24:23,844 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-06-06 00:24:23,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:24:23,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:24:23,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:24:23,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 36 [2021-06-06 00:24:23,919 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:24:23,933 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:24:23,935 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-06 00:24:23,935 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:47 [2021-06-06 00:24:24,058 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-06 00:24:24,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183966082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:24,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:24:24,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-06-06 00:24:24,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486581499] [2021-06-06 00:24:24,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-06 00:24:24,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:24:24,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-06 00:24:24,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-06-06 00:24:24,059 INFO L87 Difference]: Start difference. First operand 12660 states and 45146 transitions. Second operand has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:28,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:24:28,013 INFO L93 Difference]: Finished difference Result 27292 states and 89638 transitions. [2021-06-06 00:24:28,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2021-06-06 00:24:28,013 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:24:28,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:24:28,066 INFO L225 Difference]: With dead ends: 27292 [2021-06-06 00:24:28,066 INFO L226 Difference]: Without dead ends: 27101 [2021-06-06 00:24:28,068 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10096 ImplicationChecksByTransitivity, 2945.6ms TimeCoverageRelationStatistics Valid=3156, Invalid=22604, Unknown=0, NotChecked=0, Total=25760 [2021-06-06 00:24:28,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27101 states. [2021-06-06 00:24:28,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27101 to 12693. [2021-06-06 00:24:28,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12693 states, 12692 states have (on average 3.567601638827608) internal successors, (45280), 12692 states have internal predecessors, (45280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:28,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12693 states to 12693 states and 45280 transitions. [2021-06-06 00:24:28,542 INFO L78 Accepts]: Start accepts. Automaton has 12693 states and 45280 transitions. Word has length 36 [2021-06-06 00:24:28,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:24:28,542 INFO L482 AbstractCegarLoop]: Abstraction has 12693 states and 45280 transitions. [2021-06-06 00:24:28,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:28,542 INFO L276 IsEmpty]: Start isEmpty. Operand 12693 states and 45280 transitions. [2021-06-06 00:24:28,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:24:28,561 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:24:28,561 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:24:28,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-06 00:24:28,762 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:24:28,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:24:28,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1792794872, now seen corresponding path program 79 times [2021-06-06 00:24:28,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:24:28,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894844138] [2021-06-06 00:24:28,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:24:28,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:28,814 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:24:28,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:24:28,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894844138] [2021-06-06 00:24:28,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894844138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:28,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676468263] [2021-06-06 00:24:28,814 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:24:28,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:28,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:24:28,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:24:29,001 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:29,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676468263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:29,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:24:29,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-06 00:24:29,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845594836] [2021-06-06 00:24:29,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:24:29,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:24:29,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:24:29,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:24:29,002 INFO L87 Difference]: Start difference. First operand 12693 states and 45280 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:29,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:24:29,831 INFO L93 Difference]: Finished difference Result 30802 states and 102946 transitions. [2021-06-06 00:24:29,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-06 00:24:29,832 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:24:29,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:24:29,892 INFO L225 Difference]: With dead ends: 30802 [2021-06-06 00:24:29,892 INFO L226 Difference]: Without dead ends: 30802 [2021-06-06 00:24:29,892 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 418.3ms TimeCoverageRelationStatistics Valid=588, Invalid=1574, Unknown=0, NotChecked=0, Total=2162 [2021-06-06 00:24:29,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30802 states. [2021-06-06 00:24:30,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30802 to 12697. [2021-06-06 00:24:30,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12697 states, 12696 states have (on average 3.5682104599873976) internal successors, (45302), 12696 states have internal predecessors, (45302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:30,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12697 states to 12697 states and 45302 transitions. [2021-06-06 00:24:30,296 INFO L78 Accepts]: Start accepts. Automaton has 12697 states and 45302 transitions. Word has length 36 [2021-06-06 00:24:30,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:24:30,297 INFO L482 AbstractCegarLoop]: Abstraction has 12697 states and 45302 transitions. [2021-06-06 00:24:30,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:30,297 INFO L276 IsEmpty]: Start isEmpty. Operand 12697 states and 45302 transitions. [2021-06-06 00:24:30,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:24:30,316 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:24:30,316 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:24:30,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-06-06 00:24:30,516 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:24:30,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:24:30,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1230140076, now seen corresponding path program 80 times [2021-06-06 00:24:30,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:24:30,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741643064] [2021-06-06 00:24:30,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:24:30,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:30,570 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:30,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:24:30,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741643064] [2021-06-06 00:24:30,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741643064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:30,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850422535] [2021-06-06 00:24:30,571 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:24:30,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:24:30,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:24:30,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-06 00:24:30,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:24:30,718 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:24:30,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850422535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:30,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:24:30,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-06 00:24:30,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927168621] [2021-06-06 00:24:30,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:24:30,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:24:30,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:24:30,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:24:30,719 INFO L87 Difference]: Start difference. First operand 12697 states and 45302 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:33,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:24:33,797 INFO L93 Difference]: Finished difference Result 33049 states and 107981 transitions. [2021-06-06 00:24:33,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2021-06-06 00:24:33,797 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:24:33,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:24:33,857 INFO L225 Difference]: With dead ends: 33049 [2021-06-06 00:24:33,857 INFO L226 Difference]: Without dead ends: 32977 [2021-06-06 00:24:33,858 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11512 ImplicationChecksByTransitivity, 2128.6ms TimeCoverageRelationStatistics Valid=4716, Invalid=23006, Unknown=0, NotChecked=0, Total=27722 [2021-06-06 00:24:33,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32977 states. [2021-06-06 00:24:34,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32977 to 12738. [2021-06-06 00:24:34,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12738 states, 12737 states have (on average 3.5727408337913165) internal successors, (45506), 12737 states have internal predecessors, (45506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:34,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12738 states to 12738 states and 45506 transitions. [2021-06-06 00:24:34,256 INFO L78 Accepts]: Start accepts. Automaton has 12738 states and 45506 transitions. Word has length 36 [2021-06-06 00:24:34,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:24:34,256 INFO L482 AbstractCegarLoop]: Abstraction has 12738 states and 45506 transitions. [2021-06-06 00:24:34,256 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:34,256 INFO L276 IsEmpty]: Start isEmpty. Operand 12738 states and 45506 transitions. [2021-06-06 00:24:34,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:24:34,275 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:24:34,275 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:24:34,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-06-06 00:24:34,475 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:24:34,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:24:34,476 INFO L82 PathProgramCache]: Analyzing trace with hash -2017838672, now seen corresponding path program 81 times [2021-06-06 00:24:34,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:24:34,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223015764] [2021-06-06 00:24:34,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:24:34,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:34,532 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:34,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:24:34,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223015764] [2021-06-06 00:24:34,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223015764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:34,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650535520] [2021-06-06 00:24:34,532 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:24:34,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-06 00:24:34,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:24:34,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:24:34,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:24:34,664 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:34,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650535520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:34,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:24:34,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2021-06-06 00:24:34,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412131468] [2021-06-06 00:24:34,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:24:34,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:24:34,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:24:34,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:24:34,665 INFO L87 Difference]: Start difference. First operand 12738 states and 45506 transitions. Second operand has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:36,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:24:36,018 INFO L93 Difference]: Finished difference Result 28529 states and 93962 transitions. [2021-06-06 00:24:36,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-06 00:24:36,018 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:24:36,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:24:36,078 INFO L225 Difference]: With dead ends: 28529 [2021-06-06 00:24:36,078 INFO L226 Difference]: Without dead ends: 28385 [2021-06-06 00:24:36,079 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2641 ImplicationChecksByTransitivity, 823.8ms TimeCoverageRelationStatistics Valid=1478, Invalid=6004, Unknown=0, NotChecked=0, Total=7482 [2021-06-06 00:24:36,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28385 states. [2021-06-06 00:24:36,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28385 to 12796. [2021-06-06 00:24:36,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12796 states, 12795 states have (on average 3.569753810082063) internal successors, (45675), 12795 states have internal predecessors, (45675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:36,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12796 states to 12796 states and 45675 transitions. [2021-06-06 00:24:36,462 INFO L78 Accepts]: Start accepts. Automaton has 12796 states and 45675 transitions. Word has length 36 [2021-06-06 00:24:36,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:24:36,462 INFO L482 AbstractCegarLoop]: Abstraction has 12796 states and 45675 transitions. [2021-06-06 00:24:36,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:36,462 INFO L276 IsEmpty]: Start isEmpty. Operand 12796 states and 45675 transitions. [2021-06-06 00:24:36,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:24:36,481 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:24:36,481 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:24:36,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-06-06 00:24:36,681 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:24:36,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:24:36,682 INFO L82 PathProgramCache]: Analyzing trace with hash -545537740, now seen corresponding path program 82 times [2021-06-06 00:24:36,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:24:36,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152685636] [2021-06-06 00:24:36,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:24:36,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:36,735 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:36,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:24:36,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152685636] [2021-06-06 00:24:36,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152685636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:36,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906469174] [2021-06-06 00:24:36,736 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:24:36,760 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:24:36,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:24:36,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-06 00:24:36,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:24:36,874 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:24:36,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906469174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:36,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:24:36,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-06-06 00:24:36,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012170627] [2021-06-06 00:24:36,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:24:36,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:24:36,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:24:36,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:24:36,875 INFO L87 Difference]: Start difference. First operand 12796 states and 45675 transitions. Second operand has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:38,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:24:38,899 INFO L93 Difference]: Finished difference Result 30495 states and 99403 transitions. [2021-06-06 00:24:38,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-06-06 00:24:38,900 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:24:38,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:24:38,954 INFO L225 Difference]: With dead ends: 30495 [2021-06-06 00:24:38,955 INFO L226 Difference]: Without dead ends: 30483 [2021-06-06 00:24:38,956 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5685 ImplicationChecksByTransitivity, 1249.8ms TimeCoverageRelationStatistics Valid=2727, Invalid=11315, Unknown=0, NotChecked=0, Total=14042 [2021-06-06 00:24:38,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30483 states. [2021-06-06 00:24:39,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30483 to 11108. [2021-06-06 00:24:39,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11108 states, 11107 states have (on average 3.466822724408031) internal successors, (38506), 11107 states have internal predecessors, (38506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:39,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11108 states to 11108 states and 38506 transitions. [2021-06-06 00:24:39,307 INFO L78 Accepts]: Start accepts. Automaton has 11108 states and 38506 transitions. Word has length 36 [2021-06-06 00:24:39,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:24:39,307 INFO L482 AbstractCegarLoop]: Abstraction has 11108 states and 38506 transitions. [2021-06-06 00:24:39,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:39,307 INFO L276 IsEmpty]: Start isEmpty. Operand 11108 states and 38506 transitions. [2021-06-06 00:24:39,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:24:39,322 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:24:39,322 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:24:39,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:24:39,523 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:24:39,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:24:39,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1920078252, now seen corresponding path program 83 times [2021-06-06 00:24:39,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:24:39,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229497278] [2021-06-06 00:24:39,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:24:39,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:39,580 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:39,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:24:39,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229497278] [2021-06-06 00:24:39,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229497278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:39,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302463231] [2021-06-06 00:24:39,580 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:24:39,610 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-06 00:24:39,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:24:39,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-06 00:24:39,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:24:39,748 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:24:39,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302463231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:39,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:24:39,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-06-06 00:24:39,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72126576] [2021-06-06 00:24:39,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:24:39,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:24:39,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:24:39,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:24:39,749 INFO L87 Difference]: Start difference. First operand 11108 states and 38506 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:41,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:24:41,522 INFO L93 Difference]: Finished difference Result 23782 states and 78083 transitions. [2021-06-06 00:24:41,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-06-06 00:24:41,522 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:24:41,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:24:41,563 INFO L225 Difference]: With dead ends: 23782 [2021-06-06 00:24:41,564 INFO L226 Difference]: Without dead ends: 23782 [2021-06-06 00:24:41,565 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4543 ImplicationChecksByTransitivity, 1245.8ms TimeCoverageRelationStatistics Valid=2343, Invalid=8999, Unknown=0, NotChecked=0, Total=11342 [2021-06-06 00:24:41,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23782 states. [2021-06-06 00:24:41,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23782 to 11414. [2021-06-06 00:24:41,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11414 states, 11413 states have (on average 3.453517918163498) internal successors, (39415), 11413 states have internal predecessors, (39415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:41,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11414 states to 11414 states and 39415 transitions. [2021-06-06 00:24:41,827 INFO L78 Accepts]: Start accepts. Automaton has 11414 states and 39415 transitions. Word has length 36 [2021-06-06 00:24:41,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:24:41,827 INFO L482 AbstractCegarLoop]: Abstraction has 11414 states and 39415 transitions. [2021-06-06 00:24:41,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:41,827 INFO L276 IsEmpty]: Start isEmpty. Operand 11414 states and 39415 transitions. [2021-06-06 00:24:41,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:24:41,841 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:24:41,841 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:24:42,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:24:42,042 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:24:42,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:24:42,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1278156332, now seen corresponding path program 84 times [2021-06-06 00:24:42,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:24:42,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517882595] [2021-06-06 00:24:42,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:24:42,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:42,101 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:42,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:24:42,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517882595] [2021-06-06 00:24:42,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517882595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:42,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822054762] [2021-06-06 00:24:42,101 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:24:42,125 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-06 00:24:42,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:24:42,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-06 00:24:42,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:24:42,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-06 00:24:42,283 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:24:42,288 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:24:42,289 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:24:42,289 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:21 [2021-06-06 00:24:42,320 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-06-06 00:24:42,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2021-06-06 00:24:42,321 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:24:42,419 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:24:42,420 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:24:42,420 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-06-06 00:24:42,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:24:42,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:24:42,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:24:42,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 36 [2021-06-06 00:24:42,475 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:24:42,486 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:24:42,487 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-06 00:24:42,487 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:47 [2021-06-06 00:24:42,581 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-06 00:24:42,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822054762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:42,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:24:42,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-06-06 00:24:42,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125372184] [2021-06-06 00:24:42,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-06 00:24:42,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:24:42,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-06 00:24:42,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2021-06-06 00:24:42,582 INFO L87 Difference]: Start difference. First operand 11414 states and 39415 transitions. Second operand has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:47,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:24:47,437 INFO L93 Difference]: Finished difference Result 23675 states and 76434 transitions. [2021-06-06 00:24:47,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2021-06-06 00:24:47,437 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:24:47,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:24:47,474 INFO L225 Difference]: With dead ends: 23675 [2021-06-06 00:24:47,474 INFO L226 Difference]: Without dead ends: 23445 [2021-06-06 00:24:47,477 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12718 ImplicationChecksByTransitivity, 3478.5ms TimeCoverageRelationStatistics Valid=3502, Invalid=29078, Unknown=0, NotChecked=0, Total=32580 [2021-06-06 00:24:47,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23445 states. [2021-06-06 00:24:47,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23445 to 11648. [2021-06-06 00:24:47,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11648 states, 11647 states have (on average 3.4537649180046364) internal successors, (40226), 11647 states have internal predecessors, (40226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:47,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11648 states to 11648 states and 40226 transitions. [2021-06-06 00:24:47,766 INFO L78 Accepts]: Start accepts. Automaton has 11648 states and 40226 transitions. Word has length 36 [2021-06-06 00:24:47,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:24:47,766 INFO L482 AbstractCegarLoop]: Abstraction has 11648 states and 40226 transitions. [2021-06-06 00:24:47,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:47,766 INFO L276 IsEmpty]: Start isEmpty. Operand 11648 states and 40226 transitions. [2021-06-06 00:24:47,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:24:47,782 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:24:47,782 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:24:47,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:24:47,985 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:24:47,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:24:47,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1851612882, now seen corresponding path program 85 times [2021-06-06 00:24:47,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:24:47,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58629741] [2021-06-06 00:24:47,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:24:47,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:48,036 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:24:48,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:24:48,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58629741] [2021-06-06 00:24:48,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58629741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:48,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807483275] [2021-06-06 00:24:48,036 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:24:48,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:48,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-06 00:24:48,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:24:48,185 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-06 00:24:48,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807483275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:48,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:24:48,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-06 00:24:48,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717603500] [2021-06-06 00:24:48,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:24:48,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:24:48,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:24:48,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:24:48,186 INFO L87 Difference]: Start difference. First operand 11648 states and 40226 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:49,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:24:49,438 INFO L93 Difference]: Finished difference Result 21100 states and 70299 transitions. [2021-06-06 00:24:49,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-06-06 00:24:49,438 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:24:49,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:24:49,470 INFO L225 Difference]: With dead ends: 21100 [2021-06-06 00:24:49,471 INFO L226 Difference]: Without dead ends: 21088 [2021-06-06 00:24:49,471 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2074 ImplicationChecksByTransitivity, 749.2ms TimeCoverageRelationStatistics Valid=1148, Invalid=4858, Unknown=0, NotChecked=0, Total=6006 [2021-06-06 00:24:49,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21088 states. [2021-06-06 00:24:49,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21088 to 11913. [2021-06-06 00:24:49,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11913 states, 11912 states have (on average 3.4548354600402953) internal successors, (41154), 11912 states have internal predecessors, (41154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:49,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11913 states to 11913 states and 41154 transitions. [2021-06-06 00:24:49,739 INFO L78 Accepts]: Start accepts. Automaton has 11913 states and 41154 transitions. Word has length 36 [2021-06-06 00:24:49,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:24:49,739 INFO L482 AbstractCegarLoop]: Abstraction has 11913 states and 41154 transitions. [2021-06-06 00:24:49,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:49,739 INFO L276 IsEmpty]: Start isEmpty. Operand 11913 states and 41154 transitions. [2021-06-06 00:24:49,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:24:49,756 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:24:49,756 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:24:49,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:24:49,956 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:24:49,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:24:49,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1819802944, now seen corresponding path program 25 times [2021-06-06 00:24:49,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:24:49,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516682089] [2021-06-06 00:24:49,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:24:49,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:49,998 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-06 00:24:49,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:24:49,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516682089] [2021-06-06 00:24:49,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516682089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:49,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523687556] [2021-06-06 00:24:49,998 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:24:50,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:50,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:24:50,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:24:50,195 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:50,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523687556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:50,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:24:50,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 19 [2021-06-06 00:24:50,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238667022] [2021-06-06 00:24:50,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:24:50,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:24:50,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:24:50,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:24:50,197 INFO L87 Difference]: Start difference. First operand 11913 states and 41154 transitions. Second operand has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:51,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:24:51,289 INFO L93 Difference]: Finished difference Result 29397 states and 97752 transitions. [2021-06-06 00:24:51,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-06 00:24:51,290 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:24:51,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:24:51,344 INFO L225 Difference]: With dead ends: 29397 [2021-06-06 00:24:51,344 INFO L226 Difference]: Without dead ends: 29397 [2021-06-06 00:24:51,345 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1059 ImplicationChecksByTransitivity, 652.5ms TimeCoverageRelationStatistics Valid=957, Invalid=2583, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:24:51,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29397 states. [2021-06-06 00:24:51,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29397 to 12618. [2021-06-06 00:24:51,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12618 states, 12617 states have (on average 3.513672029801062) internal successors, (44332), 12617 states have internal predecessors, (44332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:51,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12618 states to 12618 states and 44332 transitions. [2021-06-06 00:24:51,699 INFO L78 Accepts]: Start accepts. Automaton has 12618 states and 44332 transitions. Word has length 36 [2021-06-06 00:24:51,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:24:51,699 INFO L482 AbstractCegarLoop]: Abstraction has 12618 states and 44332 transitions. [2021-06-06 00:24:51,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:51,699 INFO L276 IsEmpty]: Start isEmpty. Operand 12618 states and 44332 transitions. [2021-06-06 00:24:51,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:24:51,715 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:24:51,715 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:24:51,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-06-06 00:24:51,915 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:24:51,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:24:51,916 INFO L82 PathProgramCache]: Analyzing trace with hash 512328654, now seen corresponding path program 26 times [2021-06-06 00:24:51,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:24:51,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866683515] [2021-06-06 00:24:51,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:24:51,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:51,958 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:24:51,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:24:51,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866683515] [2021-06-06 00:24:51,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866683515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:51,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137689504] [2021-06-06 00:24:51,959 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:24:51,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:24:51,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:24:51,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:24:51,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:24:52,121 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:52,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137689504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:52,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:24:52,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 18 [2021-06-06 00:24:52,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759475141] [2021-06-06 00:24:52,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:24:52,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:24:52,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:24:52,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:24:52,122 INFO L87 Difference]: Start difference. First operand 12618 states and 44332 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:53,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:24:53,091 INFO L93 Difference]: Finished difference Result 27598 states and 91849 transitions. [2021-06-06 00:24:53,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-06 00:24:53,091 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:24:53,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:24:53,144 INFO L225 Difference]: With dead ends: 27598 [2021-06-06 00:24:53,144 INFO L226 Difference]: Without dead ends: 27598 [2021-06-06 00:24:53,145 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 937 ImplicationChecksByTransitivity, 573.7ms TimeCoverageRelationStatistics Valid=833, Invalid=2359, Unknown=0, NotChecked=0, Total=3192 [2021-06-06 00:24:53,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27598 states. [2021-06-06 00:24:53,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27598 to 12630. [2021-06-06 00:24:53,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12630 states, 12629 states have (on average 3.5136590387204056) internal successors, (44374), 12629 states have internal predecessors, (44374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:53,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12630 states to 12630 states and 44374 transitions. [2021-06-06 00:24:53,562 INFO L78 Accepts]: Start accepts. Automaton has 12630 states and 44374 transitions. Word has length 36 [2021-06-06 00:24:53,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:24:53,562 INFO L482 AbstractCegarLoop]: Abstraction has 12630 states and 44374 transitions. [2021-06-06 00:24:53,562 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:53,563 INFO L276 IsEmpty]: Start isEmpty. Operand 12630 states and 44374 transitions. [2021-06-06 00:24:53,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:24:53,580 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:24:53,580 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:24:53,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-06 00:24:53,781 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:24:53,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:24:53,781 INFO L82 PathProgramCache]: Analyzing trace with hash -2051604804, now seen corresponding path program 27 times [2021-06-06 00:24:53,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:24:53,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504914675] [2021-06-06 00:24:53,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:24:53,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:53,821 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:24:53,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:24:53,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504914675] [2021-06-06 00:24:53,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504914675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:53,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056857848] [2021-06-06 00:24:53,821 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:24:53,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-06 00:24:53,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:24:53,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:24:53,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:24:54,008 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:54,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056857848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:54,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:24:54,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 18 [2021-06-06 00:24:54,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627517697] [2021-06-06 00:24:54,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:24:54,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:24:54,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:24:54,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:24:54,009 INFO L87 Difference]: Start difference. First operand 12630 states and 44374 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:54,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:24:54,982 INFO L93 Difference]: Finished difference Result 27112 states and 90425 transitions. [2021-06-06 00:24:54,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-06 00:24:54,982 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:24:54,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:24:55,033 INFO L225 Difference]: With dead ends: 27112 [2021-06-06 00:24:55,033 INFO L226 Difference]: Without dead ends: 27108 [2021-06-06 00:24:55,034 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 507.5ms TimeCoverageRelationStatistics Valid=708, Invalid=2048, Unknown=0, NotChecked=0, Total=2756 [2021-06-06 00:24:55,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27108 states. [2021-06-06 00:24:55,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27108 to 12826. [2021-06-06 00:24:55,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12826 states, 12825 states have (on average 3.504093567251462) internal successors, (44940), 12825 states have internal predecessors, (44940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:55,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12826 states to 12826 states and 44940 transitions. [2021-06-06 00:24:55,391 INFO L78 Accepts]: Start accepts. Automaton has 12826 states and 44940 transitions. Word has length 36 [2021-06-06 00:24:55,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:24:55,391 INFO L482 AbstractCegarLoop]: Abstraction has 12826 states and 44940 transitions. [2021-06-06 00:24:55,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:55,391 INFO L276 IsEmpty]: Start isEmpty. Operand 12826 states and 44940 transitions. [2021-06-06 00:24:55,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:24:55,410 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:24:55,410 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:24:55,610 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-06 00:24:55,610 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:24:55,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:24:55,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1246962008, now seen corresponding path program 28 times [2021-06-06 00:24:55,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:24:55,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806130950] [2021-06-06 00:24:55,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:24:55,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:55,659 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:24:55,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:24:55,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806130950] [2021-06-06 00:24:55,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806130950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:55,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322560568] [2021-06-06 00:24:55,659 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:24:55,684 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:24:55,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:24:55,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:24:55,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:24:55,807 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:55,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322560568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:55,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:24:55,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 18 [2021-06-06 00:24:55,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109304503] [2021-06-06 00:24:55,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:24:55,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:24:55,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:24:55,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:24:55,809 INFO L87 Difference]: Start difference. First operand 12826 states and 44940 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:56,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:24:56,841 INFO L93 Difference]: Finished difference Result 26778 states and 89284 transitions. [2021-06-06 00:24:56,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-06 00:24:56,842 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:24:56,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:24:56,892 INFO L225 Difference]: With dead ends: 26778 [2021-06-06 00:24:56,892 INFO L226 Difference]: Without dead ends: 26778 [2021-06-06 00:24:56,892 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1207 ImplicationChecksByTransitivity, 594.4ms TimeCoverageRelationStatistics Valid=956, Invalid=2704, Unknown=0, NotChecked=0, Total=3660 [2021-06-06 00:24:56,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26778 states. [2021-06-06 00:24:57,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26778 to 12913. [2021-06-06 00:24:57,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12913 states, 12912 states have (on average 3.5164188351920695) internal successors, (45404), 12912 states have internal predecessors, (45404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:57,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12913 states to 12913 states and 45404 transitions. [2021-06-06 00:24:57,242 INFO L78 Accepts]: Start accepts. Automaton has 12913 states and 45404 transitions. Word has length 36 [2021-06-06 00:24:57,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:24:57,242 INFO L482 AbstractCegarLoop]: Abstraction has 12913 states and 45404 transitions. [2021-06-06 00:24:57,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:57,242 INFO L276 IsEmpty]: Start isEmpty. Operand 12913 states and 45404 transitions. [2021-06-06 00:24:57,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:24:57,260 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:24:57,260 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:24:57,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-06-06 00:24:57,460 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:24:57,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:24:57,461 INFO L82 PathProgramCache]: Analyzing trace with hash 680135048, now seen corresponding path program 29 times [2021-06-06 00:24:57,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:24:57,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141149774] [2021-06-06 00:24:57,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:24:57,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:57,584 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2021-06-06 00:24:57,616 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:24:57,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:24:57,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141149774] [2021-06-06 00:24:57,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141149774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:57,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506618897] [2021-06-06 00:24:57,616 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:24:57,644 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-06 00:24:57,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:24:57,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-06 00:24:57,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:24:57,790 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:24:57,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506618897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:57,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:24:57,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-06 00:24:57,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42513298] [2021-06-06 00:24:57,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:24:57,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:24:57,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:24:57,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:24:57,791 INFO L87 Difference]: Start difference. First operand 12913 states and 45404 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:02,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:25:02,140 INFO L93 Difference]: Finished difference Result 28407 states and 94171 transitions. [2021-06-06 00:25:02,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 204 states. [2021-06-06 00:25:02,140 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:25:02,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:25:02,192 INFO L225 Difference]: With dead ends: 28407 [2021-06-06 00:25:02,192 INFO L226 Difference]: Without dead ends: 28387 [2021-06-06 00:25:02,196 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18300 ImplicationChecksByTransitivity, 3360.2ms TimeCoverageRelationStatistics Valid=7298, Invalid=36174, Unknown=0, NotChecked=0, Total=43472 [2021-06-06 00:25:02,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28387 states. [2021-06-06 00:25:02,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28387 to 13021. [2021-06-06 00:25:02,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13021 states, 13020 states have (on average 3.526804915514593) internal successors, (45919), 13020 states have internal predecessors, (45919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:02,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13021 states to 13021 states and 45919 transitions. [2021-06-06 00:25:02,570 INFO L78 Accepts]: Start accepts. Automaton has 13021 states and 45919 transitions. Word has length 36 [2021-06-06 00:25:02,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:25:02,570 INFO L482 AbstractCegarLoop]: Abstraction has 13021 states and 45919 transitions. [2021-06-06 00:25:02,570 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:02,570 INFO L276 IsEmpty]: Start isEmpty. Operand 13021 states and 45919 transitions. [2021-06-06 00:25:02,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:25:02,588 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:25:02,588 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:25:02,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:25:02,788 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:25:02,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:25:02,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1847708024, now seen corresponding path program 30 times [2021-06-06 00:25:02,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:25:02,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614787292] [2021-06-06 00:25:02,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:25:02,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:25:02,845 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:02,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:25:02,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614787292] [2021-06-06 00:25:02,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614787292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:02,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724808503] [2021-06-06 00:25:02,846 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:25:02,872 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-06 00:25:02,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:25:02,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-06 00:25:02,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:25:03,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-06 00:25:03,028 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:25:03,033 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:25:03,034 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:25:03,034 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:21 [2021-06-06 00:25:03,063 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-06-06 00:25:03,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2021-06-06 00:25:03,064 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:25:03,071 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:25:03,071 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:25:03,071 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-06-06 00:25:03,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:25:03,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:25:03,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:25:03,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 36 [2021-06-06 00:25:03,204 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:25:03,215 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:25:03,217 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-06 00:25:03,217 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:47 [2021-06-06 00:25:03,315 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-06 00:25:03,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724808503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:03,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:25:03,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-06-06 00:25:03,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410828923] [2021-06-06 00:25:03,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-06 00:25:03,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:25:03,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-06 00:25:03,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-06-06 00:25:03,316 INFO L87 Difference]: Start difference. First operand 13021 states and 45919 transitions. Second operand has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:07,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:25:07,525 INFO L93 Difference]: Finished difference Result 25162 states and 83066 transitions. [2021-06-06 00:25:07,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2021-06-06 00:25:07,525 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:25:07,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:25:07,569 INFO L225 Difference]: With dead ends: 25162 [2021-06-06 00:25:07,569 INFO L226 Difference]: Without dead ends: 24983 [2021-06-06 00:25:07,572 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13764 ImplicationChecksByTransitivity, 3252.6ms TimeCoverageRelationStatistics Valid=4792, Invalid=29248, Unknown=0, NotChecked=0, Total=34040 [2021-06-06 00:25:07,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24983 states. [2021-06-06 00:25:07,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24983 to 13428. [2021-06-06 00:25:07,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13428 states, 13427 states have (on average 3.5044313696283607) internal successors, (47054), 13427 states have internal predecessors, (47054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:07,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13428 states to 13428 states and 47054 transitions. [2021-06-06 00:25:07,924 INFO L78 Accepts]: Start accepts. Automaton has 13428 states and 47054 transitions. Word has length 36 [2021-06-06 00:25:07,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:25:07,924 INFO L482 AbstractCegarLoop]: Abstraction has 13428 states and 47054 transitions. [2021-06-06 00:25:07,924 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:07,924 INFO L276 IsEmpty]: Start isEmpty. Operand 13428 states and 47054 transitions. [2021-06-06 00:25:07,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:25:07,944 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:25:07,944 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:25:08,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-06-06 00:25:08,144 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:25:08,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:25:08,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1284231232, now seen corresponding path program 86 times [2021-06-06 00:25:08,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:25:08,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811426993] [2021-06-06 00:25:08,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:25:08,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:25:08,201 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:25:08,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:25:08,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811426993] [2021-06-06 00:25:08,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811426993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:08,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369919778] [2021-06-06 00:25:08,202 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:25:08,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:25:08,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:25:08,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:25:08,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:25:08,356 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:25:08,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369919778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:08,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:25:08,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-06 00:25:08,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655695112] [2021-06-06 00:25:08,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:25:08,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:25:08,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:25:08,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:25:08,357 INFO L87 Difference]: Start difference. First operand 13428 states and 47054 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:09,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:25:09,194 INFO L93 Difference]: Finished difference Result 24409 states and 81988 transitions. [2021-06-06 00:25:09,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-06 00:25:09,194 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:25:09,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:25:09,236 INFO L225 Difference]: With dead ends: 24409 [2021-06-06 00:25:09,236 INFO L226 Difference]: Without dead ends: 24409 [2021-06-06 00:25:09,236 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 479.8ms TimeCoverageRelationStatistics Valid=614, Invalid=1836, Unknown=0, NotChecked=0, Total=2450 [2021-06-06 00:25:09,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24409 states. [2021-06-06 00:25:09,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24409 to 13273. [2021-06-06 00:25:09,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13273 states, 13272 states have (on average 3.4954792043399636) internal successors, (46392), 13272 states have internal predecessors, (46392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:09,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13273 states to 13273 states and 46392 transitions. [2021-06-06 00:25:09,564 INFO L78 Accepts]: Start accepts. Automaton has 13273 states and 46392 transitions. Word has length 36 [2021-06-06 00:25:09,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:25:09,564 INFO L482 AbstractCegarLoop]: Abstraction has 13273 states and 46392 transitions. [2021-06-06 00:25:09,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:09,564 INFO L276 IsEmpty]: Start isEmpty. Operand 13273 states and 46392 transitions. [2021-06-06 00:25:09,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:25:09,582 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:25:09,582 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:25:09,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:25:09,782 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:25:09,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:25:09,783 INFO L82 PathProgramCache]: Analyzing trace with hash -2050547776, now seen corresponding path program 87 times [2021-06-06 00:25:09,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:25:09,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689868751] [2021-06-06 00:25:09,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:25:09,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:25:09,838 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:25:09,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:25:09,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689868751] [2021-06-06 00:25:09,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689868751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:09,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102287964] [2021-06-06 00:25:09,839 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:25:09,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-06 00:25:09,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:25:09,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:25:09,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:25:10,002 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-06 00:25:10,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102287964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:10,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:25:10,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-06 00:25:10,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513683672] [2021-06-06 00:25:10,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:25:10,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:25:10,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:25:10,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:25:10,003 INFO L87 Difference]: Start difference. First operand 13273 states and 46392 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:10,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:25:10,483 INFO L93 Difference]: Finished difference Result 23775 states and 80054 transitions. [2021-06-06 00:25:10,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-06 00:25:10,483 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:25:10,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:25:10,525 INFO L225 Difference]: With dead ends: 23775 [2021-06-06 00:25:10,525 INFO L226 Difference]: Without dead ends: 23775 [2021-06-06 00:25:10,525 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 257.3ms TimeCoverageRelationStatistics Valid=287, Invalid=835, Unknown=0, NotChecked=0, Total=1122 [2021-06-06 00:25:10,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23775 states. [2021-06-06 00:25:10,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23775 to 13214. [2021-06-06 00:25:10,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13214 states, 13213 states have (on average 3.4921668054189055) internal successors, (46142), 13213 states have internal predecessors, (46142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:10,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13214 states to 13214 states and 46142 transitions. [2021-06-06 00:25:10,853 INFO L78 Accepts]: Start accepts. Automaton has 13214 states and 46142 transitions. Word has length 36 [2021-06-06 00:25:10,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:25:10,853 INFO L482 AbstractCegarLoop]: Abstraction has 13214 states and 46142 transitions. [2021-06-06 00:25:10,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:10,854 INFO L276 IsEmpty]: Start isEmpty. Operand 13214 states and 46142 transitions. [2021-06-06 00:25:10,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:25:10,879 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:25:10,879 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:25:11,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-06-06 00:25:11,090 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:25:11,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:25:11,090 INFO L82 PathProgramCache]: Analyzing trace with hash 281583822, now seen corresponding path program 88 times [2021-06-06 00:25:11,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:25:11,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319245258] [2021-06-06 00:25:11,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:25:11,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:25:11,139 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:25:11,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:25:11,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319245258] [2021-06-06 00:25:11,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319245258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:11,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411595910] [2021-06-06 00:25:11,140 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:25:11,165 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:25:11,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:25:11,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:25:11,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:25:11,266 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-06 00:25:11,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411595910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:11,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:25:11,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2021-06-06 00:25:11,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488688621] [2021-06-06 00:25:11,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:25:11,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:25:11,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:25:11,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:25:11,267 INFO L87 Difference]: Start difference. First operand 13214 states and 46142 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:11,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:25:11,726 INFO L93 Difference]: Finished difference Result 23327 states and 78114 transitions. [2021-06-06 00:25:11,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-06 00:25:11,726 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:25:11,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:25:11,765 INFO L225 Difference]: With dead ends: 23327 [2021-06-06 00:25:11,765 INFO L226 Difference]: Without dead ends: 23327 [2021-06-06 00:25:11,765 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 251.0ms TimeCoverageRelationStatistics Valid=312, Invalid=878, Unknown=0, NotChecked=0, Total=1190 [2021-06-06 00:25:11,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23327 states. [2021-06-06 00:25:12,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23327 to 13240. [2021-06-06 00:25:12,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13240 states, 13239 states have (on average 3.4912757761160207) internal successors, (46221), 13239 states have internal predecessors, (46221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:12,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13240 states to 13240 states and 46221 transitions. [2021-06-06 00:25:12,086 INFO L78 Accepts]: Start accepts. Automaton has 13240 states and 46221 transitions. Word has length 36 [2021-06-06 00:25:12,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:25:12,086 INFO L482 AbstractCegarLoop]: Abstraction has 13240 states and 46221 transitions. [2021-06-06 00:25:12,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:12,086 INFO L276 IsEmpty]: Start isEmpty. Operand 13240 states and 46221 transitions. [2021-06-06 00:25:12,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:25:12,106 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:25:12,106 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:25:12,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2021-06-06 00:25:12,306 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:25:12,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:25:12,306 INFO L82 PathProgramCache]: Analyzing trace with hash 2012617660, now seen corresponding path program 89 times [2021-06-06 00:25:12,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:25:12,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600570505] [2021-06-06 00:25:12,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:25:12,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:25:12,359 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:25:12,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:25:12,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600570505] [2021-06-06 00:25:12,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600570505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:12,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897126116] [2021-06-06 00:25:12,359 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:25:12,386 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-06 00:25:12,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:25:12,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-06 00:25:12,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:25:12,493 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-06 00:25:12,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897126116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:12,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:25:12,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-06 00:25:12,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791563942] [2021-06-06 00:25:12,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:25:12,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:25:12,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:25:12,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:25:12,494 INFO L87 Difference]: Start difference. First operand 13240 states and 46221 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:13,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:25:13,999 INFO L93 Difference]: Finished difference Result 26376 states and 86731 transitions. [2021-06-06 00:25:13,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-06-06 00:25:13,999 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:25:13,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:25:14,049 INFO L225 Difference]: With dead ends: 26376 [2021-06-06 00:25:14,049 INFO L226 Difference]: Without dead ends: 26364 [2021-06-06 00:25:14,050 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2864 ImplicationChecksByTransitivity, 947.1ms TimeCoverageRelationStatistics Valid=1623, Invalid=6387, Unknown=0, NotChecked=0, Total=8010 [2021-06-06 00:25:14,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26364 states. [2021-06-06 00:25:14,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26364 to 13310. [2021-06-06 00:25:14,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13310 states, 13309 states have (on average 3.4776467052370577) internal successors, (46284), 13309 states have internal predecessors, (46284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:14,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13310 states to 13310 states and 46284 transitions. [2021-06-06 00:25:14,389 INFO L78 Accepts]: Start accepts. Automaton has 13310 states and 46284 transitions. Word has length 36 [2021-06-06 00:25:14,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:25:14,390 INFO L482 AbstractCegarLoop]: Abstraction has 13310 states and 46284 transitions. [2021-06-06 00:25:14,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:14,390 INFO L276 IsEmpty]: Start isEmpty. Operand 13310 states and 46284 transitions. [2021-06-06 00:25:14,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:25:14,409 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:25:14,409 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:25:14,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:25:14,609 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:25:14,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:25:14,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1239534524, now seen corresponding path program 90 times [2021-06-06 00:25:14,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:25:14,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420498080] [2021-06-06 00:25:14,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:25:14,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:25:14,657 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:25:14,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:25:14,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420498080] [2021-06-06 00:25:14,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420498080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:14,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995969860] [2021-06-06 00:25:14,657 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:25:14,683 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-06 00:25:14,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:25:14,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-06 00:25:14,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:25:14,762 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-06 00:25:14,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995969860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:14,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:25:14,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2021-06-06 00:25:14,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205120489] [2021-06-06 00:25:14,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:25:14,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:25:14,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:25:14,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:25:14,763 INFO L87 Difference]: Start difference. First operand 13310 states and 46284 transitions. Second operand has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:15,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:25:15,636 INFO L93 Difference]: Finished difference Result 26781 states and 88963 transitions. [2021-06-06 00:25:15,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-06 00:25:15,636 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:25:15,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:25:15,691 INFO L225 Difference]: With dead ends: 26781 [2021-06-06 00:25:15,692 INFO L226 Difference]: Without dead ends: 26737 [2021-06-06 00:25:15,692 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1201 ImplicationChecksByTransitivity, 505.4ms TimeCoverageRelationStatistics Valid=802, Invalid=2858, Unknown=0, NotChecked=0, Total=3660 [2021-06-06 00:25:15,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26737 states. [2021-06-06 00:25:16,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26737 to 13708. [2021-06-06 00:25:16,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13708 states, 13707 states have (on average 3.4510104326256656) internal successors, (47303), 13707 states have internal predecessors, (47303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:16,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13708 states to 13708 states and 47303 transitions. [2021-06-06 00:25:16,047 INFO L78 Accepts]: Start accepts. Automaton has 13708 states and 47303 transitions. Word has length 36 [2021-06-06 00:25:16,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:25:16,047 INFO L482 AbstractCegarLoop]: Abstraction has 13708 states and 47303 transitions. [2021-06-06 00:25:16,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:16,047 INFO L276 IsEmpty]: Start isEmpty. Operand 13708 states and 47303 transitions. [2021-06-06 00:25:16,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:25:16,066 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:25:16,066 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:25:16,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:25:16,267 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:25:16,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:25:16,267 INFO L82 PathProgramCache]: Analyzing trace with hash 790366380, now seen corresponding path program 91 times [2021-06-06 00:25:16,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:25:16,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916146306] [2021-06-06 00:25:16,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:25:16,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:25:16,321 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:25:16,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:25:16,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916146306] [2021-06-06 00:25:16,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916146306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:16,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854613769] [2021-06-06 00:25:16,322 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:25:16,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:25:16,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:25:16,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:25:16,435 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:25:16,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854613769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:16,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:25:16,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 16 [2021-06-06 00:25:16,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717943097] [2021-06-06 00:25:16,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:25:16,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:25:16,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:25:16,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:25:16,436 INFO L87 Difference]: Start difference. First operand 13708 states and 47303 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:17,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:25:17,114 INFO L93 Difference]: Finished difference Result 26715 states and 87686 transitions. [2021-06-06 00:25:17,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-06 00:25:17,114 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:25:17,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:25:17,157 INFO L225 Difference]: With dead ends: 26715 [2021-06-06 00:25:17,157 INFO L226 Difference]: Without dead ends: 26715 [2021-06-06 00:25:17,158 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 808 ImplicationChecksByTransitivity, 393.8ms TimeCoverageRelationStatistics Valid=654, Invalid=1796, Unknown=0, NotChecked=0, Total=2450 [2021-06-06 00:25:17,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26715 states. [2021-06-06 00:25:17,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26715 to 14801. [2021-06-06 00:25:17,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14801 states, 14800 states have (on average 3.4525675675675678) internal successors, (51098), 14800 states have internal predecessors, (51098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:17,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14801 states to 14801 states and 51098 transitions. [2021-06-06 00:25:17,595 INFO L78 Accepts]: Start accepts. Automaton has 14801 states and 51098 transitions. Word has length 36 [2021-06-06 00:25:17,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:25:17,595 INFO L482 AbstractCegarLoop]: Abstraction has 14801 states and 51098 transitions. [2021-06-06 00:25:17,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:17,595 INFO L276 IsEmpty]: Start isEmpty. Operand 14801 states and 51098 transitions. [2021-06-06 00:25:17,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:25:17,620 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:25:17,620 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:25:17,842 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-06-06 00:25:17,843 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:25:17,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:25:17,843 INFO L82 PathProgramCache]: Analyzing trace with hash -2078452856, now seen corresponding path program 92 times [2021-06-06 00:25:17,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:25:17,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110453298] [2021-06-06 00:25:17,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:25:17,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:25:17,906 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:25:17,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:25:17,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110453298] [2021-06-06 00:25:17,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110453298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:17,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077830673] [2021-06-06 00:25:17,906 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:25:17,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:25:17,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:25:17,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-06 00:25:17,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:25:18,033 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-06 00:25:18,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077830673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:18,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:25:18,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-06 00:25:18,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816850514] [2021-06-06 00:25:18,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:25:18,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:25:18,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:25:18,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:25:18,034 INFO L87 Difference]: Start difference. First operand 14801 states and 51098 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:19,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:25:19,059 INFO L93 Difference]: Finished difference Result 26862 states and 89241 transitions. [2021-06-06 00:25:19,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-06 00:25:19,059 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:25:19,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:25:19,113 INFO L225 Difference]: With dead ends: 26862 [2021-06-06 00:25:19,113 INFO L226 Difference]: Without dead ends: 26794 [2021-06-06 00:25:19,113 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1546 ImplicationChecksByTransitivity, 589.0ms TimeCoverageRelationStatistics Valid=916, Invalid=3640, Unknown=0, NotChecked=0, Total=4556 [2021-06-06 00:25:19,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26794 states. [2021-06-06 00:25:19,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26794 to 14135. [2021-06-06 00:25:19,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14135 states, 14134 states have (on average 3.475944530918353) internal successors, (49129), 14134 states have internal predecessors, (49129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:19,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14135 states to 14135 states and 49129 transitions. [2021-06-06 00:25:19,473 INFO L78 Accepts]: Start accepts. Automaton has 14135 states and 49129 transitions. Word has length 36 [2021-06-06 00:25:19,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:25:19,473 INFO L482 AbstractCegarLoop]: Abstraction has 14135 states and 49129 transitions. [2021-06-06 00:25:19,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:19,473 INFO L276 IsEmpty]: Start isEmpty. Operand 14135 states and 49129 transitions. [2021-06-06 00:25:19,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:25:19,492 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:25:19,492 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:25:19,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:25:19,692 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:25:19,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:25:19,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1434655568, now seen corresponding path program 93 times [2021-06-06 00:25:19,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:25:19,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108705465] [2021-06-06 00:25:19,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:25:19,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:25:19,754 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:19,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:25:19,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108705465] [2021-06-06 00:25:19,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108705465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:19,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514161540] [2021-06-06 00:25:19,755 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:25:19,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-06 00:25:19,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:25:19,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:25:19,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:25:19,872 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:19,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514161540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:19,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:25:19,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 17 [2021-06-06 00:25:19,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855102308] [2021-06-06 00:25:19,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:25:19,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:25:19,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:25:19,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:25:19,873 INFO L87 Difference]: Start difference. First operand 14135 states and 49129 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:20,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:25:20,769 INFO L93 Difference]: Finished difference Result 25932 states and 85483 transitions. [2021-06-06 00:25:20,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-06 00:25:20,770 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:25:20,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:25:20,815 INFO L225 Difference]: With dead ends: 25932 [2021-06-06 00:25:20,815 INFO L226 Difference]: Without dead ends: 25932 [2021-06-06 00:25:20,815 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1372 ImplicationChecksByTransitivity, 519.9ms TimeCoverageRelationStatistics Valid=923, Invalid=2983, Unknown=0, NotChecked=0, Total=3906 [2021-06-06 00:25:20,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25932 states. [2021-06-06 00:25:21,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25932 to 14667. [2021-06-06 00:25:21,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14667 states, 14666 states have (on average 3.455407063957453) internal successors, (50677), 14666 states have internal predecessors, (50677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:21,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14667 states to 14667 states and 50677 transitions. [2021-06-06 00:25:21,162 INFO L78 Accepts]: Start accepts. Automaton has 14667 states and 50677 transitions. Word has length 36 [2021-06-06 00:25:21,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:25:21,162 INFO L482 AbstractCegarLoop]: Abstraction has 14667 states and 50677 transitions. [2021-06-06 00:25:21,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:21,162 INFO L276 IsEmpty]: Start isEmpty. Operand 14667 states and 50677 transitions. [2021-06-06 00:25:21,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:25:21,183 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:25:21,183 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:25:21,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-06-06 00:25:21,384 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:25:21,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:25:21,384 INFO L82 PathProgramCache]: Analyzing trace with hash 296378270, now seen corresponding path program 94 times [2021-06-06 00:25:21,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:25:21,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104189661] [2021-06-06 00:25:21,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:25:21,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:25:21,438 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:21,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:25:21,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104189661] [2021-06-06 00:25:21,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104189661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:21,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590551521] [2021-06-06 00:25:21,439 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:25:21,463 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:25:21,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:25:21,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-06 00:25:21,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:25:21,565 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:25:21,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590551521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:21,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:25:21,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-06 00:25:21,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53657546] [2021-06-06 00:25:21,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:25:21,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:25:21,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:25:21,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:25:21,566 INFO L87 Difference]: Start difference. First operand 14667 states and 50677 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:23,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:25:23,291 INFO L93 Difference]: Finished difference Result 27978 states and 91670 transitions. [2021-06-06 00:25:23,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-06-06 00:25:23,292 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:25:23,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:25:23,343 INFO L225 Difference]: With dead ends: 27978 [2021-06-06 00:25:23,343 INFO L226 Difference]: Without dead ends: 27978 [2021-06-06 00:25:23,344 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5435 ImplicationChecksByTransitivity, 1157.6ms TimeCoverageRelationStatistics Valid=2370, Invalid=10740, Unknown=0, NotChecked=0, Total=13110 [2021-06-06 00:25:23,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27978 states. [2021-06-06 00:25:23,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27978 to 13839. [2021-06-06 00:25:23,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13839 states, 13838 states have (on average 3.4976875270992918) internal successors, (48401), 13838 states have internal predecessors, (48401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:23,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13839 states to 13839 states and 48401 transitions. [2021-06-06 00:25:23,703 INFO L78 Accepts]: Start accepts. Automaton has 13839 states and 48401 transitions. Word has length 36 [2021-06-06 00:25:23,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:25:23,704 INFO L482 AbstractCegarLoop]: Abstraction has 13839 states and 48401 transitions. [2021-06-06 00:25:23,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:23,704 INFO L276 IsEmpty]: Start isEmpty. Operand 13839 states and 48401 transitions. [2021-06-06 00:25:23,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:25:23,723 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:25:23,723 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:25:23,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-06 00:25:23,924 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:25:23,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:25:23,924 INFO L82 PathProgramCache]: Analyzing trace with hash -384155512, now seen corresponding path program 95 times [2021-06-06 00:25:23,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:25:23,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998841073] [2021-06-06 00:25:23,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:25:23,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:25:23,989 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:23,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:25:23,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998841073] [2021-06-06 00:25:23,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998841073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:23,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315295332] [2021-06-06 00:25:23,990 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:25:24,017 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-06 00:25:24,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:25:24,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:25:24,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:25:24,107 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:24,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315295332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:24,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:25:24,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 17 [2021-06-06 00:25:24,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499840573] [2021-06-06 00:25:24,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:25:24,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:25:24,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:25:24,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:25:24,108 INFO L87 Difference]: Start difference. First operand 13839 states and 48401 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:25,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:25:25,336 INFO L93 Difference]: Finished difference Result 26069 states and 86821 transitions. [2021-06-06 00:25:25,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-06 00:25:25,336 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:25:25,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:25:25,384 INFO L225 Difference]: With dead ends: 26069 [2021-06-06 00:25:25,384 INFO L226 Difference]: Without dead ends: 25977 [2021-06-06 00:25:25,385 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2317 ImplicationChecksByTransitivity, 734.1ms TimeCoverageRelationStatistics Valid=1207, Invalid=5435, Unknown=0, NotChecked=0, Total=6642 [2021-06-06 00:25:25,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25977 states. [2021-06-06 00:25:25,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25977 to 14407. [2021-06-06 00:25:25,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14407 states, 14406 states have (on average 3.470637234485631) internal successors, (49998), 14406 states have internal predecessors, (49998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:25,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14407 states to 14407 states and 49998 transitions. [2021-06-06 00:25:25,733 INFO L78 Accepts]: Start accepts. Automaton has 14407 states and 49998 transitions. Word has length 36 [2021-06-06 00:25:25,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:25:25,734 INFO L482 AbstractCegarLoop]: Abstraction has 14407 states and 49998 transitions. [2021-06-06 00:25:25,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:25,734 INFO L276 IsEmpty]: Start isEmpty. Operand 14407 states and 49998 transitions. [2021-06-06 00:25:25,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:25:25,753 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:25:25,753 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:25:25,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-06-06 00:25:25,955 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:25:25,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:25:25,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1269898876, now seen corresponding path program 96 times [2021-06-06 00:25:25,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:25:25,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400400152] [2021-06-06 00:25:25,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:25:25,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:25:26,009 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:26,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:25:26,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400400152] [2021-06-06 00:25:26,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400400152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:26,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323206508] [2021-06-06 00:25:26,010 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:25:26,036 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-06 00:25:26,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:25:26,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-06 00:25:26,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:25:26,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-06 00:25:26,125 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:25:26,132 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:25:26,133 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:25:26,133 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-06-06 00:25:26,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:25:26,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-06-06 00:25:26,181 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:25:26,188 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:25:26,189 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:25:26,189 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-06-06 00:25:26,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:25:26,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:25:26,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:25:26,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 32 [2021-06-06 00:25:26,225 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:25:26,234 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:25:26,235 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-06 00:25:26,235 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:38 [2021-06-06 00:25:26,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:25:26,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:25:26,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 33 [2021-06-06 00:25:26,272 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:25:26,281 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:25:26,282 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-06 00:25:26,282 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:34 [2021-06-06 00:25:26,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:25:26,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:25:26,342 INFO L354 Elim1Store]: treesize reduction 48, result has 25.0 percent of original size [2021-06-06 00:25:26,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 38 [2021-06-06 00:25:26,343 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:25:26,354 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:25:26,356 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-06 00:25:26,356 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:47, output treesize:46 [2021-06-06 00:25:26,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:25:26,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:25:26,439 INFO L354 Elim1Store]: treesize reduction 88, result has 19.3 percent of original size [2021-06-06 00:25:26,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 37 treesize of output 48 [2021-06-06 00:25:26,440 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:25:26,456 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:25:26,459 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-06 00:25:26,459 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:59, output treesize:58 [2021-06-06 00:25:26,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:25:26,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:25:26,598 INFO L354 Elim1Store]: treesize reduction 136, result has 16.0 percent of original size [2021-06-06 00:25:26,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 58 [2021-06-06 00:25:26,600 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:25:26,725 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-06-06 00:25:26,726 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:25:26,730 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-06 00:25:26,730 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:71, output treesize:70 [2021-06-06 00:25:26,900 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:26,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323206508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:26,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:25:26,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-06-06 00:25:26,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661327146] [2021-06-06 00:25:26,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-06 00:25:26,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:25:26,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-06 00:25:26,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2021-06-06 00:25:26,901 INFO L87 Difference]: Start difference. First operand 14407 states and 49998 transitions. Second operand has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:29,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:25:29,716 INFO L93 Difference]: Finished difference Result 19437 states and 64480 transitions. [2021-06-06 00:25:29,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-06 00:25:29,716 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:25:29,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:25:29,750 INFO L225 Difference]: With dead ends: 19437 [2021-06-06 00:25:29,750 INFO L226 Difference]: Without dead ends: 19021 [2021-06-06 00:25:29,751 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1992 ImplicationChecksByTransitivity, 1797.8ms TimeCoverageRelationStatistics Valid=651, Invalid=5829, Unknown=0, NotChecked=0, Total=6480 [2021-06-06 00:25:29,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19021 states. [2021-06-06 00:25:30,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19021 to 15957. [2021-06-06 00:25:30,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15957 states, 15956 states have (on average 3.4367009275507647) internal successors, (54836), 15956 states have internal predecessors, (54836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:30,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15957 states to 15957 states and 54836 transitions. [2021-06-06 00:25:30,071 INFO L78 Accepts]: Start accepts. Automaton has 15957 states and 54836 transitions. Word has length 36 [2021-06-06 00:25:30,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:25:30,071 INFO L482 AbstractCegarLoop]: Abstraction has 15957 states and 54836 transitions. [2021-06-06 00:25:30,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:30,072 INFO L276 IsEmpty]: Start isEmpty. Operand 15957 states and 54836 transitions. [2021-06-06 00:25:30,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:25:30,094 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:25:30,094 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:25:30,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:25:30,296 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:25:30,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:25:30,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1525571952, now seen corresponding path program 97 times [2021-06-06 00:25:30,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:25:30,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074663353] [2021-06-06 00:25:30,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:25:30,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:25:30,361 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:30,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:25:30,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074663353] [2021-06-06 00:25:30,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074663353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:30,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037558547] [2021-06-06 00:25:30,361 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:25:30,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:25:30,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:25:30,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:25:30,534 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:30,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037558547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:30,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:25:30,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-06 00:25:30,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129456842] [2021-06-06 00:25:30,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:25:30,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:25:30,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:25:30,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:25:30,535 INFO L87 Difference]: Start difference. First operand 15957 states and 54836 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:31,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:25:31,821 INFO L93 Difference]: Finished difference Result 31024 states and 101059 transitions. [2021-06-06 00:25:31,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-06 00:25:31,822 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:25:31,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:25:31,876 INFO L225 Difference]: With dead ends: 31024 [2021-06-06 00:25:31,876 INFO L226 Difference]: Without dead ends: 31024 [2021-06-06 00:25:31,877 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1828 ImplicationChecksByTransitivity, 836.5ms TimeCoverageRelationStatistics Valid=1344, Invalid=3912, Unknown=0, NotChecked=0, Total=5256 [2021-06-06 00:25:31,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31024 states. [2021-06-06 00:25:32,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31024 to 16979. [2021-06-06 00:25:32,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16979 states, 16978 states have (on average 3.408234185416421) internal successors, (57865), 16978 states have internal predecessors, (57865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:32,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16979 states to 16979 states and 57865 transitions. [2021-06-06 00:25:32,364 INFO L78 Accepts]: Start accepts. Automaton has 16979 states and 57865 transitions. Word has length 36 [2021-06-06 00:25:32,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:25:32,364 INFO L482 AbstractCegarLoop]: Abstraction has 16979 states and 57865 transitions. [2021-06-06 00:25:32,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:32,364 INFO L276 IsEmpty]: Start isEmpty. Operand 16979 states and 57865 transitions. [2021-06-06 00:25:32,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:25:32,388 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:25:32,388 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:25:32,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-06-06 00:25:32,589 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:25:32,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:25:32,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1354812750, now seen corresponding path program 98 times [2021-06-06 00:25:32,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:25:32,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129561337] [2021-06-06 00:25:32,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:25:32,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:25:32,645 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:32,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:25:32,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129561337] [2021-06-06 00:25:32,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129561337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:32,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554422874] [2021-06-06 00:25:32,646 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:25:32,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:25:32,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:25:32,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-06 00:25:32,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:25:32,829 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:25:32,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554422874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:32,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:25:32,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-06 00:25:32,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003322770] [2021-06-06 00:25:32,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:25:32,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:25:32,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:25:32,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:25:32,830 INFO L87 Difference]: Start difference. First operand 16979 states and 57865 transitions. Second operand has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:35,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:25:35,252 INFO L93 Difference]: Finished difference Result 33282 states and 107796 transitions. [2021-06-06 00:25:35,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2021-06-06 00:25:35,252 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:25:35,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:25:35,314 INFO L225 Difference]: With dead ends: 33282 [2021-06-06 00:25:35,314 INFO L226 Difference]: Without dead ends: 33254 [2021-06-06 00:25:35,316 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7204 ImplicationChecksByTransitivity, 1751.6ms TimeCoverageRelationStatistics Valid=3502, Invalid=14320, Unknown=0, NotChecked=0, Total=17822 [2021-06-06 00:25:35,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33254 states. [2021-06-06 00:25:35,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33254 to 16803. [2021-06-06 00:25:35,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16803 states, 16802 states have (on average 3.411082014045947) internal successors, (57313), 16802 states have internal predecessors, (57313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:35,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16803 states to 16803 states and 57313 transitions. [2021-06-06 00:25:35,763 INFO L78 Accepts]: Start accepts. Automaton has 16803 states and 57313 transitions. Word has length 36 [2021-06-06 00:25:35,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:25:35,763 INFO L482 AbstractCegarLoop]: Abstraction has 16803 states and 57313 transitions. [2021-06-06 00:25:35,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:35,764 INFO L276 IsEmpty]: Start isEmpty. Operand 16803 states and 57313 transitions. [2021-06-06 00:25:35,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:25:35,786 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:25:35,786 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:25:35,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-06 00:25:35,987 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:25:35,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:25:35,987 INFO L82 PathProgramCache]: Analyzing trace with hash 2057609742, now seen corresponding path program 99 times [2021-06-06 00:25:35,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:25:35,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194746326] [2021-06-06 00:25:35,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:25:35,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:25:36,042 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:36,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:25:36,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194746326] [2021-06-06 00:25:36,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194746326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:36,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279515068] [2021-06-06 00:25:36,043 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:25:36,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-06 00:25:36,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:25:36,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:25:36,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:25:36,187 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:36,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279515068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:36,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:25:36,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-06 00:25:36,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991381425] [2021-06-06 00:25:36,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:25:36,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:25:36,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:25:36,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:25:36,188 INFO L87 Difference]: Start difference. First operand 16803 states and 57313 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:37,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:25:37,705 INFO L93 Difference]: Finished difference Result 30475 states and 100578 transitions. [2021-06-06 00:25:37,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-06-06 00:25:37,706 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:25:37,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:25:37,755 INFO L225 Difference]: With dead ends: 30475 [2021-06-06 00:25:37,755 INFO L226 Difference]: Without dead ends: 30411 [2021-06-06 00:25:37,755 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2777 ImplicationChecksByTransitivity, 1014.8ms TimeCoverageRelationStatistics Valid=1678, Invalid=5978, Unknown=0, NotChecked=0, Total=7656 [2021-06-06 00:25:37,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30411 states. [2021-06-06 00:25:38,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30411 to 16624. [2021-06-06 00:25:38,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16624 states, 16623 states have (on average 3.411417914937135) internal successors, (56708), 16623 states have internal predecessors, (56708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:38,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16624 states to 16624 states and 56708 transitions. [2021-06-06 00:25:38,157 INFO L78 Accepts]: Start accepts. Automaton has 16624 states and 56708 transitions. Word has length 36 [2021-06-06 00:25:38,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:25:38,157 INFO L482 AbstractCegarLoop]: Abstraction has 16624 states and 56708 transitions. [2021-06-06 00:25:38,157 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:38,157 INFO L276 IsEmpty]: Start isEmpty. Operand 16624 states and 56708 transitions. [2021-06-06 00:25:38,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:25:38,180 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:25:38,180 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:25:38,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:25:38,381 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:25:38,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:25:38,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1448352448, now seen corresponding path program 100 times [2021-06-06 00:25:38,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:25:38,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067189077] [2021-06-06 00:25:38,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:25:38,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:25:38,435 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:38,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:25:38,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067189077] [2021-06-06 00:25:38,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067189077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:38,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497385799] [2021-06-06 00:25:38,435 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:25:38,459 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:25:38,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:25:38,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:25:38,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:25:38,595 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:38,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497385799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:38,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:25:38,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-06-06 00:25:38,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042742530] [2021-06-06 00:25:38,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:25:38,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:25:38,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:25:38,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:25:38,596 INFO L87 Difference]: Start difference. First operand 16624 states and 56708 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:39,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:25:39,601 INFO L93 Difference]: Finished difference Result 32379 states and 105054 transitions. [2021-06-06 00:25:39,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-06 00:25:39,601 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:25:39,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:25:39,663 INFO L225 Difference]: With dead ends: 32379 [2021-06-06 00:25:39,663 INFO L226 Difference]: Without dead ends: 32379 [2021-06-06 00:25:39,664 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 949 ImplicationChecksByTransitivity, 556.6ms TimeCoverageRelationStatistics Valid=832, Invalid=2360, Unknown=0, NotChecked=0, Total=3192 [2021-06-06 00:25:39,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32379 states. [2021-06-06 00:25:40,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32379 to 17402. [2021-06-06 00:25:40,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17402 states, 17401 states have (on average 3.3985977817366817) internal successors, (59139), 17401 states have internal predecessors, (59139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:40,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17402 states to 17402 states and 59139 transitions. [2021-06-06 00:25:40,122 INFO L78 Accepts]: Start accepts. Automaton has 17402 states and 59139 transitions. Word has length 36 [2021-06-06 00:25:40,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:25:40,122 INFO L482 AbstractCegarLoop]: Abstraction has 17402 states and 59139 transitions. [2021-06-06 00:25:40,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:40,122 INFO L276 IsEmpty]: Start isEmpty. Operand 17402 states and 59139 transitions. [2021-06-06 00:25:40,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:25:40,145 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:25:40,145 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:25:40,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:25:40,346 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:25:40,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:25:40,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1791237454, now seen corresponding path program 101 times [2021-06-06 00:25:40,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:25:40,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557608327] [2021-06-06 00:25:40,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:25:40,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:25:40,401 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:40,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:25:40,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557608327] [2021-06-06 00:25:40,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557608327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:40,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286660810] [2021-06-06 00:25:40,402 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:25:40,429 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-06 00:25:40,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:25:40,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:25:40,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:25:40,558 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:40,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286660810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:40,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:25:40,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-06-06 00:25:40,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480309774] [2021-06-06 00:25:40,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:25:40,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:25:40,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:25:40,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:25:40,559 INFO L87 Difference]: Start difference. First operand 17402 states and 59139 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:41,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:25:41,508 INFO L93 Difference]: Finished difference Result 31791 states and 103499 transitions. [2021-06-06 00:25:41,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-06 00:25:41,508 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:25:41,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:25:41,559 INFO L225 Difference]: With dead ends: 31791 [2021-06-06 00:25:41,559 INFO L226 Difference]: Without dead ends: 31779 [2021-06-06 00:25:41,559 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 458.0ms TimeCoverageRelationStatistics Valid=606, Invalid=1944, Unknown=0, NotChecked=0, Total=2550 [2021-06-06 00:25:41,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31779 states. [2021-06-06 00:25:41,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31779 to 17354. [2021-06-06 00:25:41,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17354 states, 17353 states have (on average 3.3990088169192645) internal successors, (58983), 17353 states have internal predecessors, (58983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:41,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17354 states to 17354 states and 58983 transitions. [2021-06-06 00:25:41,963 INFO L78 Accepts]: Start accepts. Automaton has 17354 states and 58983 transitions. Word has length 36 [2021-06-06 00:25:41,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:25:41,963 INFO L482 AbstractCegarLoop]: Abstraction has 17354 states and 58983 transitions. [2021-06-06 00:25:41,963 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:41,963 INFO L276 IsEmpty]: Start isEmpty. Operand 17354 states and 58983 transitions. [2021-06-06 00:25:41,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:25:41,986 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:25:41,986 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:25:42,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:25:42,186 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:25:42,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:25:42,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1020594904, now seen corresponding path program 102 times [2021-06-06 00:25:42,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:25:42,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186966815] [2021-06-06 00:25:42,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:25:42,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:25:42,241 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:42,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:25:42,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186966815] [2021-06-06 00:25:42,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186966815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:42,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587467437] [2021-06-06 00:25:42,241 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:25:42,268 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-06 00:25:42,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:25:42,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-06 00:25:42,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:25:42,392 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:25:42,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587467437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:42,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:25:42,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-06-06 00:25:42,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683649350] [2021-06-06 00:25:42,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:25:42,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:25:42,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:25:42,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:25:42,393 INFO L87 Difference]: Start difference. First operand 17354 states and 58983 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:45,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:25:45,510 INFO L93 Difference]: Finished difference Result 32845 states and 106582 transitions. [2021-06-06 00:25:45,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2021-06-06 00:25:45,511 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:25:45,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:25:45,572 INFO L225 Difference]: With dead ends: 32845 [2021-06-06 00:25:45,572 INFO L226 Difference]: Without dead ends: 32825 [2021-06-06 00:25:45,574 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11588 ImplicationChecksByTransitivity, 2258.7ms TimeCoverageRelationStatistics Valid=4603, Invalid=23453, Unknown=0, NotChecked=0, Total=28056 [2021-06-06 00:25:45,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32825 states. [2021-06-06 00:25:46,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32825 to 17254. [2021-06-06 00:25:46,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17254 states, 17253 states have (on average 3.4028284935953166) internal successors, (58709), 17253 states have internal predecessors, (58709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:46,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17254 states to 17254 states and 58709 transitions. [2021-06-06 00:25:46,124 INFO L78 Accepts]: Start accepts. Automaton has 17254 states and 58709 transitions. Word has length 36 [2021-06-06 00:25:46,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:25:46,124 INFO L482 AbstractCegarLoop]: Abstraction has 17254 states and 58709 transitions. [2021-06-06 00:25:46,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:46,124 INFO L276 IsEmpty]: Start isEmpty. Operand 17254 states and 58709 transitions. [2021-06-06 00:25:46,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:25:46,147 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:25:46,147 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:25:46,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-06-06 00:25:46,347 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:25:46,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:25:46,348 INFO L82 PathProgramCache]: Analyzing trace with hash 590890608, now seen corresponding path program 103 times [2021-06-06 00:25:46,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:25:46,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112940178] [2021-06-06 00:25:46,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:25:46,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:25:46,395 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:25:46,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:25:46,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112940178] [2021-06-06 00:25:46,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112940178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:46,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544666154] [2021-06-06 00:25:46,395 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:25:46,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:25:46,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:25:46,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:25:46,553 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:46,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544666154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:46,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:25:46,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-06 00:25:46,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017228203] [2021-06-06 00:25:46,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:25:46,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:25:46,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:25:46,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:25:46,554 INFO L87 Difference]: Start difference. First operand 17254 states and 58709 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:47,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:25:47,265 INFO L93 Difference]: Finished difference Result 36771 states and 121891 transitions. [2021-06-06 00:25:47,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-06 00:25:47,265 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:25:47,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:25:47,336 INFO L225 Difference]: With dead ends: 36771 [2021-06-06 00:25:47,336 INFO L226 Difference]: Without dead ends: 36771 [2021-06-06 00:25:47,336 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 318.9ms TimeCoverageRelationStatistics Valid=403, Invalid=1157, Unknown=0, NotChecked=0, Total=1560 [2021-06-06 00:25:47,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36771 states. [2021-06-06 00:25:47,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36771 to 17615. [2021-06-06 00:25:47,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17615 states, 17614 states have (on average 3.421653230384921) internal successors, (60269), 17614 states have internal predecessors, (60269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:47,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17615 states to 17615 states and 60269 transitions. [2021-06-06 00:25:47,833 INFO L78 Accepts]: Start accepts. Automaton has 17615 states and 60269 transitions. Word has length 36 [2021-06-06 00:25:47,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:25:47,833 INFO L482 AbstractCegarLoop]: Abstraction has 17615 states and 60269 transitions. [2021-06-06 00:25:47,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:47,833 INFO L276 IsEmpty]: Start isEmpty. Operand 17615 states and 60269 transitions. [2021-06-06 00:25:47,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:25:47,858 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:25:47,858 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:25:48,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-06-06 00:25:48,058 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:25:48,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:25:48,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1255821764, now seen corresponding path program 104 times [2021-06-06 00:25:48,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:25:48,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723653452] [2021-06-06 00:25:48,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:25:48,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:25:48,130 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:48,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:25:48,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723653452] [2021-06-06 00:25:48,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723653452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:48,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036352799] [2021-06-06 00:25:48,130 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:25:48,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:25:48,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:25:48,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-06 00:25:48,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:25:48,295 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:25:48,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036352799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:48,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:25:48,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-06-06 00:25:48,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455657103] [2021-06-06 00:25:48,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-06 00:25:48,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:25:48,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-06 00:25:48,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-06-06 00:25:48,296 INFO L87 Difference]: Start difference. First operand 17615 states and 60269 transitions. Second operand has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:51,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:25:51,468 INFO L93 Difference]: Finished difference Result 43448 states and 142049 transitions. [2021-06-06 00:25:51,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2021-06-06 00:25:51,468 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:25:51,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:25:51,545 INFO L225 Difference]: With dead ends: 43448 [2021-06-06 00:25:51,546 INFO L226 Difference]: Without dead ends: 43448 [2021-06-06 00:25:51,547 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11743 ImplicationChecksByTransitivity, 2297.0ms TimeCoverageRelationStatistics Valid=5181, Invalid=22209, Unknown=0, NotChecked=0, Total=27390 [2021-06-06 00:25:51,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43448 states. [2021-06-06 00:25:52,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43448 to 17843. [2021-06-06 00:25:52,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17843 states, 17842 states have (on average 3.444064566752606) internal successors, (61449), 17842 states have internal predecessors, (61449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:52,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17843 states to 17843 states and 61449 transitions. [2021-06-06 00:25:52,103 INFO L78 Accepts]: Start accepts. Automaton has 17843 states and 61449 transitions. Word has length 36 [2021-06-06 00:25:52,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:25:52,103 INFO L482 AbstractCegarLoop]: Abstraction has 17843 states and 61449 transitions. [2021-06-06 00:25:52,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:52,104 INFO L276 IsEmpty]: Start isEmpty. Operand 17843 states and 61449 transitions. [2021-06-06 00:25:52,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:25:52,130 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:25:52,130 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:25:52,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-06-06 00:25:52,330 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:25:52,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:25:52,330 INFO L82 PathProgramCache]: Analyzing trace with hash -428849322, now seen corresponding path program 105 times [2021-06-06 00:25:52,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:25:52,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058762975] [2021-06-06 00:25:52,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:25:52,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:25:52,393 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:52,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:25:52,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058762975] [2021-06-06 00:25:52,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058762975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:52,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214560948] [2021-06-06 00:25:52,393 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:25:52,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-06 00:25:52,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:25:52,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:25:52,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:25:52,550 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:52,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214560948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:52,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:25:52,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-06 00:25:52,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875687958] [2021-06-06 00:25:52,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:25:52,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:25:52,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:25:52,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:25:52,551 INFO L87 Difference]: Start difference. First operand 17843 states and 61449 transitions. Second operand has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 21 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:54,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:25:54,710 INFO L93 Difference]: Finished difference Result 39837 states and 131123 transitions. [2021-06-06 00:25:54,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-06-06 00:25:54,711 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 21 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:25:54,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:25:54,786 INFO L225 Difference]: With dead ends: 39837 [2021-06-06 00:25:54,787 INFO L226 Difference]: Without dead ends: 39721 [2021-06-06 00:25:54,788 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6312 ImplicationChecksByTransitivity, 1441.3ms TimeCoverageRelationStatistics Valid=3104, Invalid=12396, Unknown=0, NotChecked=0, Total=15500 [2021-06-06 00:25:54,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39721 states. [2021-06-06 00:25:55,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39721 to 17669. [2021-06-06 00:25:55,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17669 states, 17668 states have (on average 3.4479284582295677) internal successors, (60918), 17668 states have internal predecessors, (60918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:55,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17669 states to 17669 states and 60918 transitions. [2021-06-06 00:25:55,415 INFO L78 Accepts]: Start accepts. Automaton has 17669 states and 60918 transitions. Word has length 36 [2021-06-06 00:25:55,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:25:55,415 INFO L482 AbstractCegarLoop]: Abstraction has 17669 states and 60918 transitions. [2021-06-06 00:25:55,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 21 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:55,415 INFO L276 IsEmpty]: Start isEmpty. Operand 17669 states and 60918 transitions. [2021-06-06 00:25:55,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:25:55,439 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:25:55,439 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:25:55,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-06-06 00:25:55,639 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:25:55,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:25:55,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1065316176, now seen corresponding path program 106 times [2021-06-06 00:25:55,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:25:55,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650213844] [2021-06-06 00:25:55,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:25:55,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:25:55,702 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:55,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:25:55,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650213844] [2021-06-06 00:25:55,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650213844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:55,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159037283] [2021-06-06 00:25:55,702 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:25:55,726 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:25:55,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:25:55,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-06 00:25:55,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:25:55,868 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:25:55,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159037283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:55,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:25:55,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 20 [2021-06-06 00:25:55,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342163065] [2021-06-06 00:25:55,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:25:55,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:25:55,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:25:55,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:25:55,869 INFO L87 Difference]: Start difference. First operand 17669 states and 60918 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:57,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:25:57,860 INFO L93 Difference]: Finished difference Result 38843 states and 128526 transitions. [2021-06-06 00:25:57,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2021-06-06 00:25:57,860 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:25:57,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:25:57,933 INFO L225 Difference]: With dead ends: 38843 [2021-06-06 00:25:57,933 INFO L226 Difference]: Without dead ends: 38727 [2021-06-06 00:25:57,934 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5135 ImplicationChecksByTransitivity, 1291.0ms TimeCoverageRelationStatistics Valid=2357, Invalid=10983, Unknown=0, NotChecked=0, Total=13340 [2021-06-06 00:25:57,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38727 states. [2021-06-06 00:25:58,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38727 to 17699. [2021-06-06 00:25:58,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17699 states, 17698 states have (on average 3.446208611142502) internal successors, (60991), 17698 states have internal predecessors, (60991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:58,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17699 states to 17699 states and 60991 transitions. [2021-06-06 00:25:58,485 INFO L78 Accepts]: Start accepts. Automaton has 17699 states and 60991 transitions. Word has length 36 [2021-06-06 00:25:58,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:25:58,485 INFO L482 AbstractCegarLoop]: Abstraction has 17699 states and 60991 transitions. [2021-06-06 00:25:58,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:58,485 INFO L276 IsEmpty]: Start isEmpty. Operand 17699 states and 60991 transitions. [2021-06-06 00:25:58,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:25:58,509 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:25:58,509 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:25:58,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:25:58,710 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:25:58,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:25:58,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1348989260, now seen corresponding path program 107 times [2021-06-06 00:25:58,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:25:58,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917668863] [2021-06-06 00:25:58,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:25:58,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:25:58,774 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:58,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:25:58,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917668863] [2021-06-06 00:25:58,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917668863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:58,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622850617] [2021-06-06 00:25:58,774 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:25:58,802 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-06 00:25:58,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:25:58,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-06 00:25:58,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:25:58,906 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:25:58,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622850617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:58,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:25:58,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 19 [2021-06-06 00:25:58,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99433895] [2021-06-06 00:25:58,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:25:58,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:25:58,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:25:58,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:25:58,907 INFO L87 Difference]: Start difference. First operand 17699 states and 60991 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:00,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:00,792 INFO L93 Difference]: Finished difference Result 37783 states and 125271 transitions. [2021-06-06 00:26:00,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-06-06 00:26:00,793 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:26:00,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:00,861 INFO L225 Difference]: With dead ends: 37783 [2021-06-06 00:26:00,861 INFO L226 Difference]: Without dead ends: 37663 [2021-06-06 00:26:00,862 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4108 ImplicationChecksByTransitivity, 1182.3ms TimeCoverageRelationStatistics Valid=2049, Invalid=9081, Unknown=0, NotChecked=0, Total=11130 [2021-06-06 00:26:00,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37663 states. [2021-06-06 00:26:01,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37663 to 18035. [2021-06-06 00:26:01,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18035 states, 18034 states have (on average 3.456692913385827) internal successors, (62338), 18034 states have internal predecessors, (62338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:01,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18035 states to 18035 states and 62338 transitions. [2021-06-06 00:26:01,365 INFO L78 Accepts]: Start accepts. Automaton has 18035 states and 62338 transitions. Word has length 36 [2021-06-06 00:26:01,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:01,365 INFO L482 AbstractCegarLoop]: Abstraction has 18035 states and 62338 transitions. [2021-06-06 00:26:01,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:01,365 INFO L276 IsEmpty]: Start isEmpty. Operand 18035 states and 62338 transitions. [2021-06-06 00:26:01,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:26:01,389 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:01,389 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:01,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-06-06 00:26:01,590 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:01,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:01,590 INFO L82 PathProgramCache]: Analyzing trace with hash 255839428, now seen corresponding path program 108 times [2021-06-06 00:26:01,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:01,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139329421] [2021-06-06 00:26:01,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:01,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:01,656 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:26:01,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:01,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139329421] [2021-06-06 00:26:01,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139329421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:01,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160058561] [2021-06-06 00:26:01,657 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:01,692 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-06 00:26:01,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:01,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-06 00:26:01,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:01,807 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:01,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160058561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:01,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:01,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-06 00:26:01,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591242177] [2021-06-06 00:26:01,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:26:01,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:01,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:26:01,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:26:01,808 INFO L87 Difference]: Start difference. First operand 18035 states and 62338 transitions. Second operand has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:03,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:03,356 INFO L93 Difference]: Finished difference Result 41243 states and 137063 transitions. [2021-06-06 00:26:03,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-06 00:26:03,357 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:26:03,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:03,445 INFO L225 Difference]: With dead ends: 41243 [2021-06-06 00:26:03,445 INFO L226 Difference]: Without dead ends: 41243 [2021-06-06 00:26:03,446 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2866 ImplicationChecksByTransitivity, 941.4ms TimeCoverageRelationStatistics Valid=1732, Invalid=6100, Unknown=0, NotChecked=0, Total=7832 [2021-06-06 00:26:03,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41243 states. [2021-06-06 00:26:04,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41243 to 18004. [2021-06-06 00:26:04,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18004 states, 18003 states have (on average 3.4605343553852137) internal successors, (62300), 18003 states have internal predecessors, (62300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:04,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18004 states to 18004 states and 62300 transitions. [2021-06-06 00:26:04,256 INFO L78 Accepts]: Start accepts. Automaton has 18004 states and 62300 transitions. Word has length 36 [2021-06-06 00:26:04,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:04,256 INFO L482 AbstractCegarLoop]: Abstraction has 18004 states and 62300 transitions. [2021-06-06 00:26:04,256 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:04,256 INFO L276 IsEmpty]: Start isEmpty. Operand 18004 states and 62300 transitions. [2021-06-06 00:26:04,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:26:04,280 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:04,280 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:04,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-06-06 00:26:04,480 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:04,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:04,481 INFO L82 PathProgramCache]: Analyzing trace with hash 30795628, now seen corresponding path program 109 times [2021-06-06 00:26:04,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:04,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071571757] [2021-06-06 00:26:04,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:04,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:04,545 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:04,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:04,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071571757] [2021-06-06 00:26:04,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071571757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:04,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063518325] [2021-06-06 00:26:04,546 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:04,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:04,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-06 00:26:04,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:04,671 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:26:04,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063518325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:04,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:04,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-06 00:26:04,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775498503] [2021-06-06 00:26:04,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:26:04,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:04,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:26:04,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:26:04,672 INFO L87 Difference]: Start difference. First operand 18004 states and 62300 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:06,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:06,147 INFO L93 Difference]: Finished difference Result 39031 states and 128601 transitions. [2021-06-06 00:26:06,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-06-06 00:26:06,147 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:26:06,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:06,219 INFO L225 Difference]: With dead ends: 39031 [2021-06-06 00:26:06,219 INFO L226 Difference]: Without dead ends: 38811 [2021-06-06 00:26:06,220 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2721 ImplicationChecksByTransitivity, 860.6ms TimeCoverageRelationStatistics Valid=1466, Invalid=6190, Unknown=0, NotChecked=0, Total=7656 [2021-06-06 00:26:06,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38811 states. [2021-06-06 00:26:06,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38811 to 18070. [2021-06-06 00:26:06,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18070 states, 18069 states have (on average 3.458354087110521) internal successors, (62489), 18069 states have internal predecessors, (62489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:06,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18070 states to 18070 states and 62489 transitions. [2021-06-06 00:26:06,760 INFO L78 Accepts]: Start accepts. Automaton has 18070 states and 62489 transitions. Word has length 36 [2021-06-06 00:26:06,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:06,760 INFO L482 AbstractCegarLoop]: Abstraction has 18070 states and 62489 transitions. [2021-06-06 00:26:06,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:06,760 INFO L276 IsEmpty]: Start isEmpty. Operand 18070 states and 62489 transitions. [2021-06-06 00:26:06,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:26:06,784 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:06,784 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:06,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:06,985 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:06,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:06,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1503096560, now seen corresponding path program 110 times [2021-06-06 00:26:06,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:06,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882709155] [2021-06-06 00:26:06,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:06,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:07,042 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:07,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:07,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882709155] [2021-06-06 00:26:07,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882709155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:07,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933822932] [2021-06-06 00:26:07,042 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:07,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:26:07,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:07,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-06 00:26:07,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:07,170 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:26:07,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933822932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:07,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:07,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-06-06 00:26:07,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612205346] [2021-06-06 00:26:07,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:26:07,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:07,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:26:07,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:26:07,171 INFO L87 Difference]: Start difference. First operand 18070 states and 62489 transitions. Second operand has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:09,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:09,482 INFO L93 Difference]: Finished difference Result 41905 states and 136821 transitions. [2021-06-06 00:26:09,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2021-06-06 00:26:09,483 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:26:09,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:09,561 INFO L225 Difference]: With dead ends: 41905 [2021-06-06 00:26:09,561 INFO L226 Difference]: Without dead ends: 41889 [2021-06-06 00:26:09,562 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7569 ImplicationChecksByTransitivity, 1585.2ms TimeCoverageRelationStatistics Valid=3281, Invalid=14541, Unknown=0, NotChecked=0, Total=17822 [2021-06-06 00:26:09,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41889 states. [2021-06-06 00:26:10,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41889 to 18381. [2021-06-06 00:26:10,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18381 states, 18380 states have (on average 3.4394450489662676) internal successors, (63217), 18380 states have internal predecessors, (63217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:10,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18381 states to 18381 states and 63217 transitions. [2021-06-06 00:26:10,135 INFO L78 Accepts]: Start accepts. Automaton has 18381 states and 63217 transitions. Word has length 36 [2021-06-06 00:26:10,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:10,135 INFO L482 AbstractCegarLoop]: Abstraction has 18381 states and 63217 transitions. [2021-06-06 00:26:10,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:10,135 INFO L276 IsEmpty]: Start isEmpty. Operand 18381 states and 63217 transitions. [2021-06-06 00:26:10,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:26:10,159 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:10,159 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:10,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:10,360 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:10,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:10,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1164442992, now seen corresponding path program 111 times [2021-06-06 00:26:10,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:10,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159790632] [2021-06-06 00:26:10,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:10,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:10,422 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:10,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:10,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159790632] [2021-06-06 00:26:10,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159790632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:10,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060517290] [2021-06-06 00:26:10,422 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:10,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-06 00:26:10,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:10,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:26:10,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:10,541 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:10,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060517290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:10,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:10,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 18 [2021-06-06 00:26:10,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816890565] [2021-06-06 00:26:10,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:26:10,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:10,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:26:10,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:26:10,542 INFO L87 Difference]: Start difference. First operand 18381 states and 63217 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:12,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:12,275 INFO L93 Difference]: Finished difference Result 39347 states and 129043 transitions. [2021-06-06 00:26:12,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-06-06 00:26:12,275 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:26:12,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:12,347 INFO L225 Difference]: With dead ends: 39347 [2021-06-06 00:26:12,348 INFO L226 Difference]: Without dead ends: 39111 [2021-06-06 00:26:12,348 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3939 ImplicationChecksByTransitivity, 1083.1ms TimeCoverageRelationStatistics Valid=2013, Invalid=8907, Unknown=0, NotChecked=0, Total=10920 [2021-06-06 00:26:12,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39111 states. [2021-06-06 00:26:12,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39111 to 18459. [2021-06-06 00:26:12,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18459 states, 18458 states have (on average 3.4369920901506124) internal successors, (63440), 18458 states have internal predecessors, (63440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:13,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18459 states to 18459 states and 63440 transitions. [2021-06-06 00:26:13,026 INFO L78 Accepts]: Start accepts. Automaton has 18459 states and 63440 transitions. Word has length 36 [2021-06-06 00:26:13,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:13,026 INFO L482 AbstractCegarLoop]: Abstraction has 18459 states and 63440 transitions. [2021-06-06 00:26:13,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:13,026 INFO L276 IsEmpty]: Start isEmpty. Operand 18459 states and 63440 transitions. [2021-06-06 00:26:13,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:26:13,051 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:13,051 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:13,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:13,252 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:13,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:13,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1293569036, now seen corresponding path program 112 times [2021-06-06 00:26:13,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:13,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242714971] [2021-06-06 00:26:13,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:13,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:13,336 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:13,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:13,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242714971] [2021-06-06 00:26:13,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242714971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:13,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200907192] [2021-06-06 00:26:13,337 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:13,372 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:26:13,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:13,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-06 00:26:13,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:13,464 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:26:13,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200907192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:13,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:13,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 18 [2021-06-06 00:26:13,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214306405] [2021-06-06 00:26:13,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:26:13,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:13,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:26:13,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:26:13,464 INFO L87 Difference]: Start difference. First operand 18459 states and 63440 transitions. Second operand has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:15,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:15,241 INFO L93 Difference]: Finished difference Result 38875 states and 128248 transitions. [2021-06-06 00:26:15,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-06-06 00:26:15,241 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:26:15,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:15,314 INFO L225 Difference]: With dead ends: 38875 [2021-06-06 00:26:15,314 INFO L226 Difference]: Without dead ends: 38767 [2021-06-06 00:26:15,315 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4742 ImplicationChecksByTransitivity, 1134.5ms TimeCoverageRelationStatistics Valid=2364, Invalid=9626, Unknown=0, NotChecked=0, Total=11990 [2021-06-06 00:26:15,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38767 states. [2021-06-06 00:26:15,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38767 to 18901. [2021-06-06 00:26:15,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18901 states, 18900 states have (on average 3.4197354497354495) internal successors, (64633), 18900 states have internal predecessors, (64633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:15,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18901 states to 18901 states and 64633 transitions. [2021-06-06 00:26:15,867 INFO L78 Accepts]: Start accepts. Automaton has 18901 states and 64633 transitions. Word has length 36 [2021-06-06 00:26:15,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:15,867 INFO L482 AbstractCegarLoop]: Abstraction has 18901 states and 64633 transitions. [2021-06-06 00:26:15,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:15,867 INFO L276 IsEmpty]: Start isEmpty. Operand 18901 states and 64633 transitions. [2021-06-06 00:26:15,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:26:15,892 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:15,892 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:16,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2021-06-06 00:26:16,093 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:16,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:16,093 INFO L82 PathProgramCache]: Analyzing trace with hash -253287824, now seen corresponding path program 113 times [2021-06-06 00:26:16,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:16,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079934886] [2021-06-06 00:26:16,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:16,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:16,156 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:16,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:16,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079934886] [2021-06-06 00:26:16,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079934886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:16,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703368545] [2021-06-06 00:26:16,156 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:16,183 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-06 00:26:16,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:16,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-06 00:26:16,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:16,287 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:16,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703368545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:16,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:16,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 19 [2021-06-06 00:26:16,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560603270] [2021-06-06 00:26:16,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:26:16,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:16,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:26:16,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:26:16,288 INFO L87 Difference]: Start difference. First operand 18901 states and 64633 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:18,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:18,861 INFO L93 Difference]: Finished difference Result 40691 states and 133194 transitions. [2021-06-06 00:26:18,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2021-06-06 00:26:18,861 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:26:18,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:18,935 INFO L225 Difference]: With dead ends: 40691 [2021-06-06 00:26:18,936 INFO L226 Difference]: Without dead ends: 40691 [2021-06-06 00:26:18,937 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10041 ImplicationChecksByTransitivity, 1816.3ms TimeCoverageRelationStatistics Valid=4335, Invalid=18315, Unknown=0, NotChecked=0, Total=22650 [2021-06-06 00:26:18,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40691 states. [2021-06-06 00:26:19,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40691 to 17027. [2021-06-06 00:26:19,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17027 states, 17026 states have (on average 3.482086221073652) internal successors, (59286), 17026 states have internal predecessors, (59286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:19,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17027 states to 17027 states and 59286 transitions. [2021-06-06 00:26:19,475 INFO L78 Accepts]: Start accepts. Automaton has 17027 states and 59286 transitions. Word has length 36 [2021-06-06 00:26:19,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:19,476 INFO L482 AbstractCegarLoop]: Abstraction has 17027 states and 59286 transitions. [2021-06-06 00:26:19,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:19,476 INFO L276 IsEmpty]: Start isEmpty. Operand 17027 states and 59286 transitions. [2021-06-06 00:26:19,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:26:19,499 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:19,499 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:19,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-06-06 00:26:19,701 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:19,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:19,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1172720400, now seen corresponding path program 114 times [2021-06-06 00:26:19,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:19,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741768591] [2021-06-06 00:26:19,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:19,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:19,755 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:26:19,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:19,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741768591] [2021-06-06 00:26:19,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741768591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:19,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537374968] [2021-06-06 00:26:19,756 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:19,781 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-06 00:26:19,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:19,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:26:19,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:19,920 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:19,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537374968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:19,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:19,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-06 00:26:19,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961425517] [2021-06-06 00:26:19,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:26:19,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:19,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:26:19,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:26:19,920 INFO L87 Difference]: Start difference. First operand 17027 states and 59286 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:20,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:20,781 INFO L93 Difference]: Finished difference Result 36359 states and 121507 transitions. [2021-06-06 00:26:20,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-06 00:26:20,781 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:26:20,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:20,851 INFO L225 Difference]: With dead ends: 36359 [2021-06-06 00:26:20,851 INFO L226 Difference]: Without dead ends: 36359 [2021-06-06 00:26:20,852 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 418.9ms TimeCoverageRelationStatistics Valid=568, Invalid=1784, Unknown=0, NotChecked=0, Total=2352 [2021-06-06 00:26:20,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36359 states. [2021-06-06 00:26:21,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36359 to 17013. [2021-06-06 00:26:21,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17013 states, 17012 states have (on average 3.477251351986833) internal successors, (59155), 17012 states have internal predecessors, (59155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:21,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17013 states to 17013 states and 59155 transitions. [2021-06-06 00:26:21,323 INFO L78 Accepts]: Start accepts. Automaton has 17013 states and 59155 transitions. Word has length 36 [2021-06-06 00:26:21,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:21,323 INFO L482 AbstractCegarLoop]: Abstraction has 17013 states and 59155 transitions. [2021-06-06 00:26:21,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:21,323 INFO L276 IsEmpty]: Start isEmpty. Operand 17013 states and 59155 transitions. [2021-06-06 00:26:21,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:26:21,346 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:21,346 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:21,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-06-06 00:26:21,547 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:21,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:21,547 INFO L82 PathProgramCache]: Analyzing trace with hash -248629260, now seen corresponding path program 115 times [2021-06-06 00:26:21,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:21,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965329206] [2021-06-06 00:26:21,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:21,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:21,602 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:26:21,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:21,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965329206] [2021-06-06 00:26:21,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965329206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:21,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032227482] [2021-06-06 00:26:21,602 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:21,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:21,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:26:21,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:21,818 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2021-06-06 00:26:21,899 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:21,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032227482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:21,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:21,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-06-06 00:26:21,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455943661] [2021-06-06 00:26:21,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:26:21,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:21,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:26:21,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:26:21,900 INFO L87 Difference]: Start difference. First operand 17013 states and 59155 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:23,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:23,070 INFO L93 Difference]: Finished difference Result 37754 states and 124912 transitions. [2021-06-06 00:26:23,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-06 00:26:23,071 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:26:23,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:23,145 INFO L225 Difference]: With dead ends: 37754 [2021-06-06 00:26:23,145 INFO L226 Difference]: Without dead ends: 37754 [2021-06-06 00:26:23,145 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1251 ImplicationChecksByTransitivity, 596.6ms TimeCoverageRelationStatistics Valid=910, Invalid=2996, Unknown=0, NotChecked=0, Total=3906 [2021-06-06 00:26:23,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37754 states. [2021-06-06 00:26:23,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37754 to 17024. [2021-06-06 00:26:23,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17024 states, 17023 states have (on average 3.4766492392645243) internal successors, (59183), 17023 states have internal predecessors, (59183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:23,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17024 states to 17024 states and 59183 transitions. [2021-06-06 00:26:23,629 INFO L78 Accepts]: Start accepts. Automaton has 17024 states and 59183 transitions. Word has length 36 [2021-06-06 00:26:23,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:23,629 INFO L482 AbstractCegarLoop]: Abstraction has 17024 states and 59183 transitions. [2021-06-06 00:26:23,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:23,629 INFO L276 IsEmpty]: Start isEmpty. Operand 17024 states and 59183 transitions. [2021-06-06 00:26:23,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:26:23,652 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:23,652 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:23,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-06-06 00:26:23,853 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:23,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:23,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1447944180, now seen corresponding path program 116 times [2021-06-06 00:26:23,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:23,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751405650] [2021-06-06 00:26:23,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:23,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:23,907 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:26:23,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:23,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751405650] [2021-06-06 00:26:23,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751405650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:23,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99984297] [2021-06-06 00:26:23,908 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:23,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:26:23,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:23,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:26:23,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:24,100 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:24,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99984297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:24,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:24,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-06 00:26:24,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630667137] [2021-06-06 00:26:24,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-06 00:26:24,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:24,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-06 00:26:24,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-06-06 00:26:24,101 INFO L87 Difference]: Start difference. First operand 17024 states and 59183 transitions. Second operand has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:25,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:25,304 INFO L93 Difference]: Finished difference Result 37846 states and 125454 transitions. [2021-06-06 00:26:25,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-06 00:26:25,305 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:26:25,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:25,374 INFO L225 Difference]: With dead ends: 37846 [2021-06-06 00:26:25,374 INFO L226 Difference]: Without dead ends: 37846 [2021-06-06 00:26:25,375 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1308 ImplicationChecksByTransitivity, 631.8ms TimeCoverageRelationStatistics Valid=959, Invalid=3073, Unknown=0, NotChecked=0, Total=4032 [2021-06-06 00:26:25,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37846 states. [2021-06-06 00:26:25,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37846 to 17016. [2021-06-06 00:26:25,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17016 states, 17015 states have (on average 3.4787540405524537) internal successors, (59191), 17015 states have internal predecessors, (59191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:25,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17016 states to 17016 states and 59191 transitions. [2021-06-06 00:26:25,984 INFO L78 Accepts]: Start accepts. Automaton has 17016 states and 59191 transitions. Word has length 36 [2021-06-06 00:26:25,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:25,984 INFO L482 AbstractCegarLoop]: Abstraction has 17016 states and 59191 transitions. [2021-06-06 00:26:25,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:25,984 INFO L276 IsEmpty]: Start isEmpty. Operand 17016 states and 59191 transitions. [2021-06-06 00:26:26,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:26:26,009 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:26,009 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:26,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-06 00:26:26,209 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:26,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:26,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1463404976, now seen corresponding path program 117 times [2021-06-06 00:26:26,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:26,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912040763] [2021-06-06 00:26:26,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:26,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:26,269 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:26:26,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:26,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912040763] [2021-06-06 00:26:26,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912040763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:26,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141508069] [2021-06-06 00:26:26,269 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:26,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-06 00:26:26,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:26,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-06 00:26:26,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:26,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-06-06 00:26:26,418 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:26:26,428 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:26:26,430 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-06 00:26:26,430 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:30 [2021-06-06 00:26:26,517 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-06-06 00:26:26,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-06 00:26:26,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:26:26,531 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:26:26,533 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-06 00:26:26,533 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:42 [2021-06-06 00:26:26,603 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-06-06 00:26:26,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2021-06-06 00:26:26,604 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:26:26,621 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:26:26,626 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-06 00:26:26,626 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:55, output treesize:54 [2021-06-06 00:26:26,850 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-06 00:26:26,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141508069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:26,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:26,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-06-06 00:26:26,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482738960] [2021-06-06 00:26:26,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-06 00:26:26,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:26,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-06 00:26:26,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-06-06 00:26:26,852 INFO L87 Difference]: Start difference. First operand 17016 states and 59191 transitions. Second operand has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:30,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:30,470 INFO L93 Difference]: Finished difference Result 29934 states and 99159 transitions. [2021-06-06 00:26:30,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-06 00:26:30,470 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:26:30,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:30,527 INFO L225 Difference]: With dead ends: 29934 [2021-06-06 00:26:30,527 INFO L226 Difference]: Without dead ends: 29934 [2021-06-06 00:26:30,528 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3260 ImplicationChecksByTransitivity, 2487.8ms TimeCoverageRelationStatistics Valid=1800, Invalid=8300, Unknown=0, NotChecked=0, Total=10100 [2021-06-06 00:26:30,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29934 states. [2021-06-06 00:26:30,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29934 to 17104. [2021-06-06 00:26:30,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17104 states, 17103 states have (on average 3.484067122727007) internal successors, (59588), 17103 states have internal predecessors, (59588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:30,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17104 states to 17104 states and 59588 transitions. [2021-06-06 00:26:30,939 INFO L78 Accepts]: Start accepts. Automaton has 17104 states and 59588 transitions. Word has length 36 [2021-06-06 00:26:30,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:30,939 INFO L482 AbstractCegarLoop]: Abstraction has 17104 states and 59588 transitions. [2021-06-06 00:26:30,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:30,939 INFO L276 IsEmpty]: Start isEmpty. Operand 17104 states and 59588 transitions. [2021-06-06 00:26:30,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:26:30,963 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:30,963 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:31,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:31,163 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:31,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:31,164 INFO L82 PathProgramCache]: Analyzing trace with hash -784175790, now seen corresponding path program 118 times [2021-06-06 00:26:31,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:31,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761307546] [2021-06-06 00:26:31,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:31,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:31,210 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:26:31,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:31,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761307546] [2021-06-06 00:26:31,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761307546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:31,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398723007] [2021-06-06 00:26:31,211 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:31,235 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:26:31,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:31,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-06 00:26:31,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:31,383 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:26:31,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398723007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:31,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:31,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-06 00:26:31,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341351717] [2021-06-06 00:26:31,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:26:31,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:31,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:26:31,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:26:31,384 INFO L87 Difference]: Start difference. First operand 17104 states and 59588 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:34,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:34,132 INFO L93 Difference]: Finished difference Result 36789 states and 120419 transitions. [2021-06-06 00:26:34,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2021-06-06 00:26:34,133 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:26:34,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:34,199 INFO L225 Difference]: With dead ends: 36789 [2021-06-06 00:26:34,200 INFO L226 Difference]: Without dead ends: 36789 [2021-06-06 00:26:34,201 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7472 ImplicationChecksByTransitivity, 1829.1ms TimeCoverageRelationStatistics Valid=3298, Invalid=15608, Unknown=0, NotChecked=0, Total=18906 [2021-06-06 00:26:34,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36789 states. [2021-06-06 00:26:34,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36789 to 17371. [2021-06-06 00:26:34,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17371 states, 17370 states have (on average 3.482153137593552) internal successors, (60485), 17370 states have internal predecessors, (60485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:34,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17371 states to 17371 states and 60485 transitions. [2021-06-06 00:26:34,671 INFO L78 Accepts]: Start accepts. Automaton has 17371 states and 60485 transitions. Word has length 36 [2021-06-06 00:26:34,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:34,671 INFO L482 AbstractCegarLoop]: Abstraction has 17371 states and 60485 transitions. [2021-06-06 00:26:34,671 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:34,671 INFO L276 IsEmpty]: Start isEmpty. Operand 17371 states and 60485 transitions. [2021-06-06 00:26:34,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:26:34,695 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:34,695 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:34,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-06-06 00:26:34,895 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:34,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:34,896 INFO L82 PathProgramCache]: Analyzing trace with hash -265224148, now seen corresponding path program 119 times [2021-06-06 00:26:34,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:34,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136440502] [2021-06-06 00:26:34,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:34,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:34,950 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:34,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:34,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136440502] [2021-06-06 00:26:34,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136440502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:34,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295885523] [2021-06-06 00:26:34,950 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:34,978 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-06 00:26:34,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:34,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:26:34,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:35,093 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:35,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295885523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:35,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:35,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-06 00:26:35,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81516581] [2021-06-06 00:26:35,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:26:35,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:35,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:26:35,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:26:35,094 INFO L87 Difference]: Start difference. First operand 17371 states and 60485 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:36,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:36,819 INFO L93 Difference]: Finished difference Result 34245 states and 114443 transitions. [2021-06-06 00:26:36,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-06-06 00:26:36,819 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:26:36,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:36,885 INFO L225 Difference]: With dead ends: 34245 [2021-06-06 00:26:36,885 INFO L226 Difference]: Without dead ends: 34173 [2021-06-06 00:26:36,886 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3600 ImplicationChecksByTransitivity, 1113.5ms TimeCoverageRelationStatistics Valid=2064, Invalid=7836, Unknown=0, NotChecked=0, Total=9900 [2021-06-06 00:26:36,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34173 states. [2021-06-06 00:26:37,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34173 to 16919. [2021-06-06 00:26:37,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16919 states, 16918 states have (on average 3.4816763210781416) internal successors, (58903), 16918 states have internal predecessors, (58903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:37,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16919 states to 16919 states and 58903 transitions. [2021-06-06 00:26:37,347 INFO L78 Accepts]: Start accepts. Automaton has 16919 states and 58903 transitions. Word has length 36 [2021-06-06 00:26:37,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:37,347 INFO L482 AbstractCegarLoop]: Abstraction has 16919 states and 58903 transitions. [2021-06-06 00:26:37,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:37,347 INFO L276 IsEmpty]: Start isEmpty. Operand 16919 states and 58903 transitions. [2021-06-06 00:26:37,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:26:37,374 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:37,374 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:37,574 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2021-06-06 00:26:37,574 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:37,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:37,574 INFO L82 PathProgramCache]: Analyzing trace with hash -907070356, now seen corresponding path program 120 times [2021-06-06 00:26:37,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:37,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457925047] [2021-06-06 00:26:37,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:37,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:37,638 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:37,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:37,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457925047] [2021-06-06 00:26:37,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457925047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:37,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743088359] [2021-06-06 00:26:37,639 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:37,666 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-06 00:26:37,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:37,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-06 00:26:37,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:37,785 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:26:37,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743088359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:37,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:37,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-06 00:26:37,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112484283] [2021-06-06 00:26:37,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:26:37,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:37,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:26:37,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:26:37,786 INFO L87 Difference]: Start difference. First operand 16919 states and 58903 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:39,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:39,795 INFO L93 Difference]: Finished difference Result 34016 states and 113681 transitions. [2021-06-06 00:26:39,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-06-06 00:26:39,796 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:26:39,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:39,859 INFO L225 Difference]: With dead ends: 34016 [2021-06-06 00:26:39,859 INFO L226 Difference]: Without dead ends: 33956 [2021-06-06 00:26:39,860 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4457 ImplicationChecksByTransitivity, 1300.0ms TimeCoverageRelationStatistics Valid=2358, Invalid=9852, Unknown=0, NotChecked=0, Total=12210 [2021-06-06 00:26:39,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33956 states. [2021-06-06 00:26:40,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33956 to 16875. [2021-06-06 00:26:40,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16875 states, 16874 states have (on average 3.4836434751688987) internal successors, (58783), 16874 states have internal predecessors, (58783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:40,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16875 states to 16875 states and 58783 transitions. [2021-06-06 00:26:40,278 INFO L78 Accepts]: Start accepts. Automaton has 16875 states and 58783 transitions. Word has length 36 [2021-06-06 00:26:40,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:40,278 INFO L482 AbstractCegarLoop]: Abstraction has 16875 states and 58783 transitions. [2021-06-06 00:26:40,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:40,278 INFO L276 IsEmpty]: Start isEmpty. Operand 16875 states and 58783 transitions. [2021-06-06 00:26:40,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:26:40,300 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:40,300 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:40,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:40,501 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:40,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:40,501 INFO L82 PathProgramCache]: Analyzing trace with hash -719103608, now seen corresponding path program 121 times [2021-06-06 00:26:40,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:40,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341321558] [2021-06-06 00:26:40,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:40,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:40,558 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:40,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:40,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341321558] [2021-06-06 00:26:40,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341321558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:40,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855325410] [2021-06-06 00:26:40,559 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:40,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:40,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:26:40,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:40,736 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:26:40,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855325410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:40,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:40,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-06 00:26:40,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692010904] [2021-06-06 00:26:40,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-06 00:26:40,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:40,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-06 00:26:40,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-06-06 00:26:40,737 INFO L87 Difference]: Start difference. First operand 16875 states and 58783 transitions. Second operand has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:41,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:41,842 INFO L93 Difference]: Finished difference Result 38582 states and 129677 transitions. [2021-06-06 00:26:41,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-06 00:26:41,842 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:26:41,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:41,916 INFO L225 Difference]: With dead ends: 38582 [2021-06-06 00:26:41,916 INFO L226 Difference]: Without dead ends: 38582 [2021-06-06 00:26:41,917 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1240 ImplicationChecksByTransitivity, 618.1ms TimeCoverageRelationStatistics Valid=922, Invalid=3110, Unknown=0, NotChecked=0, Total=4032 [2021-06-06 00:26:41,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38582 states. [2021-06-06 00:26:42,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38582 to 17496. [2021-06-06 00:26:42,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17496 states, 17495 states have (on average 3.5108316661903403) internal successors, (61422), 17495 states have internal predecessors, (61422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:42,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17496 states to 17496 states and 61422 transitions. [2021-06-06 00:26:42,402 INFO L78 Accepts]: Start accepts. Automaton has 17496 states and 61422 transitions. Word has length 36 [2021-06-06 00:26:42,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:42,402 INFO L482 AbstractCegarLoop]: Abstraction has 17496 states and 61422 transitions. [2021-06-06 00:26:42,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:42,402 INFO L276 IsEmpty]: Start isEmpty. Operand 17496 states and 61422 transitions. [2021-06-06 00:26:42,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:26:42,426 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:42,426 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:42,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:42,626 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:42,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:42,626 INFO L82 PathProgramCache]: Analyzing trace with hash -703642812, now seen corresponding path program 122 times [2021-06-06 00:26:42,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:42,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740588960] [2021-06-06 00:26:42,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:42,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:42,683 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:42,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:42,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740588960] [2021-06-06 00:26:42,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740588960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:42,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000513350] [2021-06-06 00:26:42,684 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:42,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:26:42,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:42,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:26:42,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:42,862 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:26:42,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000513350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:42,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:42,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-06 00:26:42,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448928137] [2021-06-06 00:26:42,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-06 00:26:42,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:42,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-06 00:26:42,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-06-06 00:26:42,863 INFO L87 Difference]: Start difference. First operand 17496 states and 61422 transitions. Second operand has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:44,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:44,147 INFO L93 Difference]: Finished difference Result 39068 states and 130518 transitions. [2021-06-06 00:26:44,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-06 00:26:44,147 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:26:44,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:44,334 INFO L225 Difference]: With dead ends: 39068 [2021-06-06 00:26:44,334 INFO L226 Difference]: Without dead ends: 39068 [2021-06-06 00:26:44,334 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1579 ImplicationChecksByTransitivity, 691.9ms TimeCoverageRelationStatistics Valid=1170, Invalid=3660, Unknown=0, NotChecked=0, Total=4830 [2021-06-06 00:26:44,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39068 states. [2021-06-06 00:26:44,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39068 to 17040. [2021-06-06 00:26:44,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17040 states, 17039 states have (on average 3.4929866776219263) internal successors, (59517), 17039 states have internal predecessors, (59517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:44,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17040 states to 17040 states and 59517 transitions. [2021-06-06 00:26:44,793 INFO L78 Accepts]: Start accepts. Automaton has 17040 states and 59517 transitions. Word has length 36 [2021-06-06 00:26:44,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:44,793 INFO L482 AbstractCegarLoop]: Abstraction has 17040 states and 59517 transitions. [2021-06-06 00:26:44,793 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:44,793 INFO L276 IsEmpty]: Start isEmpty. Operand 17040 states and 59517 transitions. [2021-06-06 00:26:44,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:26:44,816 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:44,816 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:45,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:45,017 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:45,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:45,017 INFO L82 PathProgramCache]: Analyzing trace with hash 444490688, now seen corresponding path program 123 times [2021-06-06 00:26:45,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:45,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841467926] [2021-06-06 00:26:45,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:45,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:45,073 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:45,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:45,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841467926] [2021-06-06 00:26:45,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841467926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:45,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706707639] [2021-06-06 00:26:45,074 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:45,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-06 00:26:45,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:45,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:26:45,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:45,246 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:26:45,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706707639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:45,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:45,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-06 00:26:45,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901800380] [2021-06-06 00:26:45,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:26:45,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:45,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:26:45,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:26:45,247 INFO L87 Difference]: Start difference. First operand 17040 states and 59517 transitions. Second operand has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:46,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:46,180 INFO L93 Difference]: Finished difference Result 35719 states and 119509 transitions. [2021-06-06 00:26:46,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-06 00:26:46,180 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:26:46,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:46,246 INFO L225 Difference]: With dead ends: 35719 [2021-06-06 00:26:46,246 INFO L226 Difference]: Without dead ends: 35719 [2021-06-06 00:26:46,246 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 498.8ms TimeCoverageRelationStatistics Valid=703, Invalid=2377, Unknown=0, NotChecked=0, Total=3080 [2021-06-06 00:26:46,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35719 states. [2021-06-06 00:26:46,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35719 to 16855. [2021-06-06 00:26:46,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16855 states, 16854 states have (on average 3.483683398599739) internal successors, (58714), 16854 states have internal predecessors, (58714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:46,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16855 states to 16855 states and 58714 transitions. [2021-06-06 00:26:46,712 INFO L78 Accepts]: Start accepts. Automaton has 16855 states and 58714 transitions. Word has length 36 [2021-06-06 00:26:46,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:46,713 INFO L482 AbstractCegarLoop]: Abstraction has 16855 states and 58714 transitions. [2021-06-06 00:26:46,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:46,713 INFO L276 IsEmpty]: Start isEmpty. Operand 16855 states and 58714 transitions. [2021-06-06 00:26:46,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:26:46,735 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:46,735 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:46,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:46,935 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:46,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:46,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1078249612, now seen corresponding path program 124 times [2021-06-06 00:26:46,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:46,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118462652] [2021-06-06 00:26:46,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:46,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:46,986 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:46,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:46,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118462652] [2021-06-06 00:26:46,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118462652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:46,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390757700] [2021-06-06 00:26:46,987 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 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:47,011 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:26:47,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:47,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:26:47,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:47,151 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:26:47,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390757700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:47,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:47,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-06 00:26:47,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935038347] [2021-06-06 00:26:47,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:26:47,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:47,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:26:47,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:26:47,152 INFO L87 Difference]: Start difference. First operand 16855 states and 58714 transitions. Second operand has 20 states, 20 states have (on average 2.9) internal successors, (58), 20 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:47,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:47,891 INFO L93 Difference]: Finished difference Result 34570 states and 115444 transitions. [2021-06-06 00:26:47,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-06 00:26:47,892 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 20 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:26:47,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:47,964 INFO L225 Difference]: With dead ends: 34570 [2021-06-06 00:26:47,964 INFO L226 Difference]: Without dead ends: 34570 [2021-06-06 00:26:47,964 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 416.1ms TimeCoverageRelationStatistics Valid=555, Invalid=1797, Unknown=0, NotChecked=0, Total=2352 [2021-06-06 00:26:48,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34570 states. [2021-06-06 00:26:48,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34570 to 16873. [2021-06-06 00:26:48,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16873 states, 16872 states have (on average 3.4834637268847795) internal successors, (58773), 16872 states have internal predecessors, (58773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:48,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16873 states to 16873 states and 58773 transitions. [2021-06-06 00:26:48,441 INFO L78 Accepts]: Start accepts. Automaton has 16873 states and 58773 transitions. Word has length 36 [2021-06-06 00:26:48,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:48,441 INFO L482 AbstractCegarLoop]: Abstraction has 16873 states and 58773 transitions. [2021-06-06 00:26:48,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 20 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:48,441 INFO L276 IsEmpty]: Start isEmpty. Operand 16873 states and 58773 transitions. [2021-06-06 00:26:48,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:26:48,576 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:48,576 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:48,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-06-06 00:26:48,777 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:48,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:48,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1249008814, now seen corresponding path program 125 times [2021-06-06 00:26:48,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:48,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569770366] [2021-06-06 00:26:48,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:48,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:48,827 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:48,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:48,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569770366] [2021-06-06 00:26:48,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569770366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:48,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880688723] [2021-06-06 00:26:48,828 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:48,856 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-06 00:26:48,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:48,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-06 00:26:48,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:48,992 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:26:48,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880688723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:48,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:48,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-06 00:26:48,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022573409] [2021-06-06 00:26:48,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:26:48,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:48,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:26:48,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:26:48,993 INFO L87 Difference]: Start difference. First operand 16873 states and 58773 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:51,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:51,066 INFO L93 Difference]: Finished difference Result 36187 states and 119134 transitions. [2021-06-06 00:26:51,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-06-06 00:26:51,066 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:26:51,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:51,134 INFO L225 Difference]: With dead ends: 36187 [2021-06-06 00:26:51,134 INFO L226 Difference]: Without dead ends: 36183 [2021-06-06 00:26:51,135 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4706 ImplicationChecksByTransitivity, 1295.0ms TimeCoverageRelationStatistics Valid=2270, Invalid=10612, Unknown=0, NotChecked=0, Total=12882 [2021-06-06 00:26:51,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36183 states. [2021-06-06 00:26:51,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36183 to 17057. [2021-06-06 00:26:51,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17057 states, 17056 states have (on average 3.480593339587242) internal successors, (59365), 17056 states have internal predecessors, (59365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:51,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17057 states to 17057 states and 59365 transitions. [2021-06-06 00:26:51,597 INFO L78 Accepts]: Start accepts. Automaton has 17057 states and 59365 transitions. Word has length 36 [2021-06-06 00:26:51,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:51,597 INFO L482 AbstractCegarLoop]: Abstraction has 17057 states and 59365 transitions. [2021-06-06 00:26:51,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:51,597 INFO L276 IsEmpty]: Start isEmpty. Operand 17057 states and 59365 transitions. [2021-06-06 00:26:51,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:26:51,620 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:51,620 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:51,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:51,821 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:51,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:51,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1793730568, now seen corresponding path program 126 times [2021-06-06 00:26:51,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:51,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410138047] [2021-06-06 00:26:51,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:51,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:51,874 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:51,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:51,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410138047] [2021-06-06 00:26:51,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410138047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:51,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395121557] [2021-06-06 00:26:51,874 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:51,899 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-06 00:26:51,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:51,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-06 00:26:51,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:52,027 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-06 00:26:52,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395121557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:52,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:52,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-06-06 00:26:52,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123712071] [2021-06-06 00:26:52,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:26:52,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:52,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:26:52,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:26:52,028 INFO L87 Difference]: Start difference. First operand 17057 states and 59365 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:54,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:54,251 INFO L93 Difference]: Finished difference Result 38126 states and 127134 transitions. [2021-06-06 00:26:54,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2021-06-06 00:26:54,252 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:26:54,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:54,323 INFO L225 Difference]: With dead ends: 38126 [2021-06-06 00:26:54,323 INFO L226 Difference]: Without dead ends: 38126 [2021-06-06 00:26:54,324 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5730 ImplicationChecksByTransitivity, 1402.0ms TimeCoverageRelationStatistics Valid=2664, Invalid=11856, Unknown=0, NotChecked=0, Total=14520 [2021-06-06 00:26:54,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38126 states. [2021-06-06 00:26:54,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38126 to 17565. [2021-06-06 00:26:54,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17565 states, 17564 states have (on average 3.4988613072193124) internal successors, (61454), 17564 states have internal predecessors, (61454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:54,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17565 states to 17565 states and 61454 transitions. [2021-06-06 00:26:54,918 INFO L78 Accepts]: Start accepts. Automaton has 17565 states and 61454 transitions. Word has length 36 [2021-06-06 00:26:54,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:54,918 INFO L482 AbstractCegarLoop]: Abstraction has 17565 states and 61454 transitions. [2021-06-06 00:26:54,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:54,918 INFO L276 IsEmpty]: Start isEmpty. Operand 17565 states and 61454 transitions. [2021-06-06 00:26:54,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:26:54,942 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:54,942 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:55,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-06-06 00:26:55,142 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:55,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:55,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1809191364, now seen corresponding path program 127 times [2021-06-06 00:26:55,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:55,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969755943] [2021-06-06 00:26:55,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:55,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:55,193 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:55,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:55,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969755943] [2021-06-06 00:26:55,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969755943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:55,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65882960] [2021-06-06 00:26:55,194 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:55,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:55,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:26:55,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:55,353 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:26:55,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65882960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:55,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:55,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-06-06 00:26:55,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31172204] [2021-06-06 00:26:55,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:26:55,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:55,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:26:55,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:26:55,354 INFO L87 Difference]: Start difference. First operand 17565 states and 61454 transitions. Second operand has 20 states, 20 states have (on average 3.1) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:56,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:56,264 INFO L93 Difference]: Finished difference Result 35670 states and 119988 transitions. [2021-06-06 00:26:56,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-06 00:26:56,265 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:26:56,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:56,346 INFO L225 Difference]: With dead ends: 35670 [2021-06-06 00:26:56,346 INFO L226 Difference]: Without dead ends: 35670 [2021-06-06 00:26:56,347 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 925 ImplicationChecksByTransitivity, 476.4ms TimeCoverageRelationStatistics Valid=748, Invalid=2222, Unknown=0, NotChecked=0, Total=2970 [2021-06-06 00:26:56,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35670 states. [2021-06-06 00:26:56,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35670 to 17384. [2021-06-06 00:26:56,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17384 states, 17383 states have (on average 3.49122706092159) internal successors, (60688), 17383 states have internal predecessors, (60688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:56,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17384 states to 17384 states and 60688 transitions. [2021-06-06 00:26:56,845 INFO L78 Accepts]: Start accepts. Automaton has 17384 states and 60688 transitions. Word has length 36 [2021-06-06 00:26:56,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:56,845 INFO L482 AbstractCegarLoop]: Abstraction has 17384 states and 60688 transitions. [2021-06-06 00:26:56,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:56,845 INFO L276 IsEmpty]: Start isEmpty. Operand 17384 states and 60688 transitions. [2021-06-06 00:26:56,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:26:56,869 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:56,869 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:57,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-06-06 00:26:57,069 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:57,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:57,069 INFO L82 PathProgramCache]: Analyzing trace with hash -530582264, now seen corresponding path program 128 times [2021-06-06 00:26:57,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:57,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618577643] [2021-06-06 00:26:57,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:57,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:57,131 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:57,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:57,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618577643] [2021-06-06 00:26:57,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618577643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:57,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814050082] [2021-06-06 00:26:57,132 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:57,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:26:57,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:57,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-06 00:26:57,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:57,310 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:26:57,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814050082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:57,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:57,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2021-06-06 00:26:57,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180995832] [2021-06-06 00:26:57,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-06 00:26:57,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:57,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-06 00:26:57,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:26:57,311 INFO L87 Difference]: Start difference. First operand 17384 states and 60688 transitions. Second operand has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:00,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:27:00,744 INFO L93 Difference]: Finished difference Result 54535 states and 178905 transitions. [2021-06-06 00:27:00,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2021-06-06 00:27:00,745 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:27:00,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:27:00,855 INFO L225 Difference]: With dead ends: 54535 [2021-06-06 00:27:00,855 INFO L226 Difference]: Without dead ends: 54535 [2021-06-06 00:27:00,856 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12884 ImplicationChecksByTransitivity, 2431.5ms TimeCoverageRelationStatistics Valid=5153, Invalid=24603, Unknown=0, NotChecked=0, Total=29756 [2021-06-06 00:27:00,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54535 states. [2021-06-06 00:27:01,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54535 to 23450. [2021-06-06 00:27:01,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23450 states, 23449 states have (on average 3.4936671073393324) internal successors, (81923), 23449 states have internal predecessors, (81923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:01,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23450 states to 23450 states and 81923 transitions. [2021-06-06 00:27:01,549 INFO L78 Accepts]: Start accepts. Automaton has 23450 states and 81923 transitions. Word has length 36 [2021-06-06 00:27:01,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:27:01,549 INFO L482 AbstractCegarLoop]: Abstraction has 23450 states and 81923 transitions. [2021-06-06 00:27:01,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:01,549 INFO L276 IsEmpty]: Start isEmpty. Operand 23450 states and 81923 transitions. [2021-06-06 00:27:01,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:27:01,580 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:27:01,580 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:27:01,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-06-06 00:27:01,781 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:27:01,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:27:01,781 INFO L82 PathProgramCache]: Analyzing trace with hash 2079713946, now seen corresponding path program 129 times [2021-06-06 00:27:01,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:27:01,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769173125] [2021-06-06 00:27:01,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:27:01,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:01,841 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:01,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:27:01,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769173125] [2021-06-06 00:27:01,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769173125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:01,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387727069] [2021-06-06 00:27:01,841 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 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:01,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-06 00:27:01,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:27:01,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-06 00:27:01,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:27:02,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-06 00:27:02,008 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:27:02,015 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:27:02,015 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:27:02,015 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-06 00:27:02,067 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-06-06 00:27:02,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2021-06-06 00:27:02,068 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:27:02,074 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:27:02,075 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:27:02,075 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-06-06 00:27:02,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:27:02,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:27:02,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:27:02,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 36 [2021-06-06 00:27:02,131 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:27:02,142 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:27:02,143 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-06 00:27:02,143 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:47 [2021-06-06 00:27:02,239 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 24 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-06 00:27:02,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387727069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:02,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:27:02,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-06-06 00:27:02,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440076129] [2021-06-06 00:27:02,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-06 00:27:02,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:27:02,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-06 00:27:02,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2021-06-06 00:27:02,240 INFO L87 Difference]: Start difference. First operand 23450 states and 81923 transitions. Second operand has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:05,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:27:05,285 INFO L93 Difference]: Finished difference Result 43833 states and 145969 transitions. [2021-06-06 00:27:05,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2021-06-06 00:27:05,285 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:27:05,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:27:05,372 INFO L225 Difference]: With dead ends: 43833 [2021-06-06 00:27:05,372 INFO L226 Difference]: Without dead ends: 43801 [2021-06-06 00:27:05,374 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6349 ImplicationChecksByTransitivity, 2298.9ms TimeCoverageRelationStatistics Valid=2492, Invalid=14278, Unknown=0, NotChecked=0, Total=16770 [2021-06-06 00:27:05,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43801 states. [2021-06-06 00:27:06,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43801 to 24220. [2021-06-06 00:27:06,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24220 states, 24219 states have (on average 3.4956852058301333) internal successors, (84662), 24219 states have internal predecessors, (84662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:06,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24220 states to 24220 states and 84662 transitions. [2021-06-06 00:27:06,116 INFO L78 Accepts]: Start accepts. Automaton has 24220 states and 84662 transitions. Word has length 36 [2021-06-06 00:27:06,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:27:06,116 INFO L482 AbstractCegarLoop]: Abstraction has 24220 states and 84662 transitions. [2021-06-06 00:27:06,116 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:06,116 INFO L276 IsEmpty]: Start isEmpty. Operand 24220 states and 84662 transitions. [2021-06-06 00:27:06,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:27:06,149 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:27:06,149 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:27:06,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:06,349 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:27:06,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:27:06,350 INFO L82 PathProgramCache]: Analyzing trace with hash -408762388, now seen corresponding path program 130 times [2021-06-06 00:27:06,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:27:06,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702681640] [2021-06-06 00:27:06,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:27:06,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:06,394 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:06,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:27:06,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702681640] [2021-06-06 00:27:06,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702681640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:06,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371838784] [2021-06-06 00:27:06,395 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 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:06,420 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:27:06,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:27:06,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-06 00:27:06,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:27:06,600 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:27:06,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371838784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:06,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:27:06,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-06 00:27:06,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072761989] [2021-06-06 00:27:06,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:27:06,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:27:06,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:27:06,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:27:06,602 INFO L87 Difference]: Start difference. First operand 24220 states and 84662 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:09,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:27:09,027 INFO L93 Difference]: Finished difference Result 58769 states and 199442 transitions. [2021-06-06 00:27:09,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2021-06-06 00:27:09,027 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:27:09,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:27:09,157 INFO L225 Difference]: With dead ends: 58769 [2021-06-06 00:27:09,157 INFO L226 Difference]: Without dead ends: 58705 [2021-06-06 00:27:09,159 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6795 ImplicationChecksByTransitivity, 1616.4ms TimeCoverageRelationStatistics Valid=2796, Invalid=13716, Unknown=0, NotChecked=0, Total=16512 [2021-06-06 00:27:09,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58705 states. [2021-06-06 00:27:09,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58705 to 25245. [2021-06-06 00:27:09,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25245 states, 25244 states have (on average 3.517627951196324) internal successors, (88799), 25244 states have internal predecessors, (88799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:10,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25245 states to 25245 states and 88799 transitions. [2021-06-06 00:27:10,002 INFO L78 Accepts]: Start accepts. Automaton has 25245 states and 88799 transitions. Word has length 36 [2021-06-06 00:27:10,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:27:10,002 INFO L482 AbstractCegarLoop]: Abstraction has 25245 states and 88799 transitions. [2021-06-06 00:27:10,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:10,002 INFO L276 IsEmpty]: Start isEmpty. Operand 25245 states and 88799 transitions. [2021-06-06 00:27:10,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:27:10,035 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:27:10,035 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:27:10,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2021-06-06 00:27:10,236 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:27:10,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:27:10,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1347426568, now seen corresponding path program 131 times [2021-06-06 00:27:10,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:27:10,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840610172] [2021-06-06 00:27:10,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:27:10,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:10,290 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:10,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:27:10,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840610172] [2021-06-06 00:27:10,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840610172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:10,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260307118] [2021-06-06 00:27:10,291 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:10,320 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-06 00:27:10,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:27:10,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:27:10,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:27:10,476 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:10,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260307118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:10,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:27:10,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2021-06-06 00:27:10,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422808457] [2021-06-06 00:27:10,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:27:10,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:27:10,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:27:10,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:27:10,477 INFO L87 Difference]: Start difference. First operand 25245 states and 88799 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:11,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:27:11,302 INFO L93 Difference]: Finished difference Result 57930 states and 199300 transitions. [2021-06-06 00:27:11,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-06 00:27:11,302 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:27:11,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:27:11,432 INFO L225 Difference]: With dead ends: 57930 [2021-06-06 00:27:11,432 INFO L226 Difference]: Without dead ends: 57930 [2021-06-06 00:27:11,432 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 314.9ms TimeCoverageRelationStatistics Valid=401, Invalid=1081, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:27:11,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57930 states. [2021-06-06 00:27:12,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57930 to 26000. [2021-06-06 00:27:12,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26000 states, 25999 states have (on average 3.5369821916227546) internal successors, (91958), 25999 states have internal predecessors, (91958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:12,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26000 states to 26000 states and 91958 transitions. [2021-06-06 00:27:12,261 INFO L78 Accepts]: Start accepts. Automaton has 26000 states and 91958 transitions. Word has length 36 [2021-06-06 00:27:12,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:27:12,261 INFO L482 AbstractCegarLoop]: Abstraction has 26000 states and 91958 transitions. [2021-06-06 00:27:12,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:12,261 INFO L276 IsEmpty]: Start isEmpty. Operand 26000 states and 91958 transitions. [2021-06-06 00:27:12,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:27:12,294 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:27:12,294 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:27:12,494 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:12,495 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:27:12,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:27:12,495 INFO L82 PathProgramCache]: Analyzing trace with hash 339853380, now seen corresponding path program 132 times [2021-06-06 00:27:12,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:27:12,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991984102] [2021-06-06 00:27:12,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:27:12,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:12,541 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:12,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:27:12,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991984102] [2021-06-06 00:27:12,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991984102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:12,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664937886] [2021-06-06 00:27:12,542 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:12,566 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-06 00:27:12,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:27:12,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-06 00:27:12,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:27:12,710 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:27:12,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664937886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:12,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:27:12,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-06 00:27:12,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900589327] [2021-06-06 00:27:12,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:27:12,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:27:12,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:27:12,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:27:12,711 INFO L87 Difference]: Start difference. First operand 26000 states and 91958 transitions. Second operand has 21 states, 21 states have (on average 3.0) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:15,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:27:15,046 INFO L93 Difference]: Finished difference Result 60488 states and 206164 transitions. [2021-06-06 00:27:15,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2021-06-06 00:27:15,046 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:27:15,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:27:15,180 INFO L225 Difference]: With dead ends: 60488 [2021-06-06 00:27:15,180 INFO L226 Difference]: Without dead ends: 60488 [2021-06-06 00:27:15,182 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6645 ImplicationChecksByTransitivity, 1530.7ms TimeCoverageRelationStatistics Valid=3256, Invalid=12746, Unknown=0, NotChecked=0, Total=16002 [2021-06-06 00:27:15,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60488 states. [2021-06-06 00:27:16,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60488 to 26680. [2021-06-06 00:27:16,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26680 states, 26679 states have (on average 3.5661756437647587) internal successors, (95142), 26679 states have internal predecessors, (95142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:16,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26680 states to 26680 states and 95142 transitions. [2021-06-06 00:27:16,203 INFO L78 Accepts]: Start accepts. Automaton has 26680 states and 95142 transitions. Word has length 36 [2021-06-06 00:27:16,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:27:16,203 INFO L482 AbstractCegarLoop]: Abstraction has 26680 states and 95142 transitions. [2021-06-06 00:27:16,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:16,203 INFO L276 IsEmpty]: Start isEmpty. Operand 26680 states and 95142 transitions. [2021-06-06 00:27:16,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:27:16,245 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:27:16,245 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:27:16,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:16,445 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:27:16,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:27:16,445 INFO L82 PathProgramCache]: Analyzing trace with hash -710764454, now seen corresponding path program 133 times [2021-06-06 00:27:16,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:27:16,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910710697] [2021-06-06 00:27:16,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:27:16,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:16,491 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:16,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:27:16,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910710697] [2021-06-06 00:27:16,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910710697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:16,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390081727] [2021-06-06 00:27:16,491 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:16,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:16,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-06 00:27:16,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:27:16,638 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:27:16,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390081727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:16,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:27:16,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-06 00:27:16,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285276381] [2021-06-06 00:27:16,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:27:16,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:27:16,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:27:16,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:27:16,639 INFO L87 Difference]: Start difference. First operand 26680 states and 95142 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:18,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:27:18,052 INFO L93 Difference]: Finished difference Result 57569 states and 197823 transitions. [2021-06-06 00:27:18,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-06-06 00:27:18,053 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:27:18,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:27:18,191 INFO L225 Difference]: With dead ends: 57569 [2021-06-06 00:27:18,192 INFO L226 Difference]: Without dead ends: 57521 [2021-06-06 00:27:18,192 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2543 ImplicationChecksByTransitivity, 804.0ms TimeCoverageRelationStatistics Valid=1427, Invalid=5379, Unknown=0, NotChecked=0, Total=6806 [2021-06-06 00:27:18,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57521 states. [2021-06-06 00:27:19,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57521 to 26690. [2021-06-06 00:27:19,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26690 states, 26689 states have (on average 3.5660009741841208) internal successors, (95173), 26689 states have internal predecessors, (95173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:19,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26690 states to 26690 states and 95173 transitions. [2021-06-06 00:27:19,222 INFO L78 Accepts]: Start accepts. Automaton has 26690 states and 95173 transitions. Word has length 36 [2021-06-06 00:27:19,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:27:19,222 INFO L482 AbstractCegarLoop]: Abstraction has 26690 states and 95173 transitions. [2021-06-06 00:27:19,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:19,223 INFO L276 IsEmpty]: Start isEmpty. Operand 26690 states and 95173 transitions. [2021-06-06 00:27:19,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:27:19,266 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:27:19,266 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:27:19,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable164 [2021-06-06 00:27:19,467 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:27:19,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:27:19,467 INFO L82 PathProgramCache]: Analyzing trace with hash 329516758, now seen corresponding path program 134 times [2021-06-06 00:27:19,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:27:19,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948275580] [2021-06-06 00:27:19,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:27:19,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:19,523 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:19,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:27:19,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948275580] [2021-06-06 00:27:19,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948275580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:19,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226646478] [2021-06-06 00:27:19,524 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:19,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:27:19,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:27:19,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:27:19,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:27:19,691 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:19,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226646478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:19,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:27:19,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-06-06 00:27:19,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588069653] [2021-06-06 00:27:19,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:27:19,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:27:19,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:27:19,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:27:19,691 INFO L87 Difference]: Start difference. First operand 26690 states and 95173 transitions. Second operand has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:20,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:27:20,458 INFO L93 Difference]: Finished difference Result 57984 states and 198618 transitions. [2021-06-06 00:27:20,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-06 00:27:20,459 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:27:20,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:27:20,596 INFO L225 Difference]: With dead ends: 57984 [2021-06-06 00:27:20,596 INFO L226 Difference]: Without dead ends: 57984 [2021-06-06 00:27:20,596 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 334.3ms TimeCoverageRelationStatistics Valid=474, Invalid=1248, Unknown=0, NotChecked=0, Total=1722 [2021-06-06 00:27:20,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57984 states. [2021-06-06 00:27:21,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57984 to 27762. [2021-06-06 00:27:21,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27762 states, 27761 states have (on average 3.5949353409459315) internal successors, (99799), 27761 states have internal predecessors, (99799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:21,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27762 states to 27762 states and 99799 transitions. [2021-06-06 00:27:21,635 INFO L78 Accepts]: Start accepts. Automaton has 27762 states and 99799 transitions. Word has length 36 [2021-06-06 00:27:21,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:27:21,635 INFO L482 AbstractCegarLoop]: Abstraction has 27762 states and 99799 transitions. [2021-06-06 00:27:21,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:21,635 INFO L276 IsEmpty]: Start isEmpty. Operand 27762 states and 99799 transitions. [2021-06-06 00:27:21,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:27:21,678 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:27:21,678 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:27:21,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:21,878 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:27:21,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:27:21,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1122382768, now seen corresponding path program 135 times [2021-06-06 00:27:21,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:27:21,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488263844] [2021-06-06 00:27:21,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:27:21,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:21,929 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:27:21,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:27:21,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488263844] [2021-06-06 00:27:21,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488263844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:21,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163043820] [2021-06-06 00:27:21,929 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 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:21,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-06 00:27:21,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:27:21,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:27:21,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:27:22,323 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:22,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163043820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:22,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:27:22,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 18 [2021-06-06 00:27:22,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497956365] [2021-06-06 00:27:22,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:27:22,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:27:22,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:27:22,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:27:22,324 INFO L87 Difference]: Start difference. First operand 27762 states and 99799 transitions. Second operand has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:23,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:27:23,451 INFO L93 Difference]: Finished difference Result 54138 states and 184921 transitions. [2021-06-06 00:27:23,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-06 00:27:23,451 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:27:23,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:27:23,564 INFO L225 Difference]: With dead ends: 54138 [2021-06-06 00:27:23,564 INFO L226 Difference]: Without dead ends: 54066 [2021-06-06 00:27:23,564 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1412 ImplicationChecksByTransitivity, 821.3ms TimeCoverageRelationStatistics Valid=855, Invalid=3435, Unknown=0, NotChecked=0, Total=4290 [2021-06-06 00:27:23,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54066 states. [2021-06-06 00:27:24,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54066 to 27784. [2021-06-06 00:27:24,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27784 states, 27783 states have (on average 3.5943562610229276) internal successors, (99862), 27783 states have internal predecessors, (99862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:24,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27784 states to 27784 states and 99862 transitions. [2021-06-06 00:27:24,413 INFO L78 Accepts]: Start accepts. Automaton has 27784 states and 99862 transitions. Word has length 36 [2021-06-06 00:27:24,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:27:24,413 INFO L482 AbstractCegarLoop]: Abstraction has 27784 states and 99862 transitions. [2021-06-06 00:27:24,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:24,413 INFO L276 IsEmpty]: Start isEmpty. Operand 27784 states and 99862 transitions. [2021-06-06 00:27:24,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:27:24,455 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:27:24,455 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:27:24,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:24,656 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:27:24,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:27:24,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1700283596, now seen corresponding path program 136 times [2021-06-06 00:27:24,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:27:24,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512760544] [2021-06-06 00:27:24,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:27:24,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:24,704 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:27:24,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:27:24,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512760544] [2021-06-06 00:27:24,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512760544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:24,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113240753] [2021-06-06 00:27:24,704 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 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:24,732 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:27:24,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:27:24,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-06 00:27:24,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:27:24,852 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:27:24,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113240753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:24,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:27:24,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-06 00:27:24,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892029827] [2021-06-06 00:27:24,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:27:24,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:27:24,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:27:24,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:27:24,853 INFO L87 Difference]: Start difference. First operand 27784 states and 99862 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:27,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:27:27,113 INFO L93 Difference]: Finished difference Result 59804 states and 200815 transitions. [2021-06-06 00:27:27,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-06-06 00:27:27,113 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:27:27,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:27:27,263 INFO L225 Difference]: With dead ends: 59804 [2021-06-06 00:27:27,263 INFO L226 Difference]: Without dead ends: 59804 [2021-06-06 00:27:27,264 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5826 ImplicationChecksByTransitivity, 1440.8ms TimeCoverageRelationStatistics Valid=2466, Invalid=11576, Unknown=0, NotChecked=0, Total=14042 [2021-06-06 00:27:27,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59804 states. [2021-06-06 00:27:28,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59804 to 27938. [2021-06-06 00:27:28,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27938 states, 27937 states have (on average 3.5910441350180764) internal successors, (100323), 27937 states have internal predecessors, (100323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:28,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27938 states to 27938 states and 100323 transitions. [2021-06-06 00:27:28,321 INFO L78 Accepts]: Start accepts. Automaton has 27938 states and 100323 transitions. Word has length 36 [2021-06-06 00:27:28,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:27:28,321 INFO L482 AbstractCegarLoop]: Abstraction has 27938 states and 100323 transitions. [2021-06-06 00:27:28,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:28,321 INFO L276 IsEmpty]: Start isEmpty. Operand 27938 states and 100323 transitions. [2021-06-06 00:27:28,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:27:28,366 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:27:28,366 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:27:28,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-06-06 00:27:28,567 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:27:28,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:27:28,567 INFO L82 PathProgramCache]: Analyzing trace with hash -2038937164, now seen corresponding path program 137 times [2021-06-06 00:27:28,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:27:28,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143522145] [2021-06-06 00:27:28,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:27:28,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:28,632 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:28,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:27:28,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143522145] [2021-06-06 00:27:28,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143522145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:28,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88595750] [2021-06-06 00:27:28,632 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 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:28,659 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-06 00:27:28,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:27:28,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:27:28,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:27:28,793 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:28,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88595750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:28,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:27:28,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 18 [2021-06-06 00:27:28,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006947815] [2021-06-06 00:27:28,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:27:28,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:27:28,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:27:28,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:27:28,794 INFO L87 Difference]: Start difference. First operand 27938 states and 100323 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:30,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:27:30,366 INFO L93 Difference]: Finished difference Result 55738 states and 189163 transitions. [2021-06-06 00:27:30,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-06 00:27:30,366 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:27:30,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:27:30,492 INFO L225 Difference]: With dead ends: 55738 [2021-06-06 00:27:30,492 INFO L226 Difference]: Without dead ends: 55594 [2021-06-06 00:27:30,492 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2045 ImplicationChecksByTransitivity, 881.3ms TimeCoverageRelationStatistics Valid=1122, Invalid=4884, Unknown=0, NotChecked=0, Total=6006 [2021-06-06 00:27:30,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55594 states. [2021-06-06 00:27:31,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55594 to 27966. [2021-06-06 00:27:31,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27966 states, 27965 states have (on average 3.5902377972465582) internal successors, (100401), 27965 states have internal predecessors, (100401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:31,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27966 states to 27966 states and 100401 transitions. [2021-06-06 00:27:31,577 INFO L78 Accepts]: Start accepts. Automaton has 27966 states and 100401 transitions. Word has length 36 [2021-06-06 00:27:31,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:27:31,578 INFO L482 AbstractCegarLoop]: Abstraction has 27966 states and 100401 transitions. [2021-06-06 00:27:31,578 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:31,578 INFO L276 IsEmpty]: Start isEmpty. Operand 27966 states and 100401 transitions. [2021-06-06 00:27:31,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:27:31,619 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:27:31,619 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:27:31,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-06-06 00:27:31,820 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:27:31,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:27:31,820 INFO L82 PathProgramCache]: Analyzing trace with hash -201981896, now seen corresponding path program 138 times [2021-06-06 00:27:31,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:27:31,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016227351] [2021-06-06 00:27:31,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:27:31,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:31,871 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:31,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:27:31,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016227351] [2021-06-06 00:27:31,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016227351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:31,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202288474] [2021-06-06 00:27:31,871 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:31,896 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-06 00:27:31,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:27:31,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-06 00:27:31,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:27:32,024 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:27:32,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202288474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:32,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:27:32,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-06 00:27:32,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128622290] [2021-06-06 00:27:32,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:27:32,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:27:32,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:27:32,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:27:32,025 INFO L87 Difference]: Start difference. First operand 27966 states and 100401 transitions. Second operand has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:33,012 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2021-06-06 00:27:33,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:27:33,796 INFO L93 Difference]: Finished difference Result 58306 states and 196728 transitions. [2021-06-06 00:27:33,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-06-06 00:27:33,797 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:27:33,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:27:33,920 INFO L225 Difference]: With dead ends: 58306 [2021-06-06 00:27:33,920 INFO L226 Difference]: Without dead ends: 58238 [2021-06-06 00:27:33,921 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3796 ImplicationChecksByTransitivity, 1189.0ms TimeCoverageRelationStatistics Valid=1816, Invalid=7886, Unknown=0, NotChecked=0, Total=9702 [2021-06-06 00:27:33,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58238 states. [2021-06-06 00:27:34,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58238 to 28222. [2021-06-06 00:27:34,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28222 states, 28221 states have (on average 3.5836788207363313) internal successors, (101135), 28221 states have internal predecessors, (101135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:35,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28222 states to 28222 states and 101135 transitions. [2021-06-06 00:27:35,015 INFO L78 Accepts]: Start accepts. Automaton has 28222 states and 101135 transitions. Word has length 36 [2021-06-06 00:27:35,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:27:35,015 INFO L482 AbstractCegarLoop]: Abstraction has 28222 states and 101135 transitions. [2021-06-06 00:27:35,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:35,015 INFO L276 IsEmpty]: Start isEmpty. Operand 28222 states and 101135 transitions. [2021-06-06 00:27:35,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:27:35,060 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:27:35,061 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:27:35,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-06-06 00:27:35,261 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:27:35,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:27:35,261 INFO L82 PathProgramCache]: Analyzing trace with hash 838299316, now seen corresponding path program 139 times [2021-06-06 00:27:35,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:27:35,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899332248] [2021-06-06 00:27:35,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:27:35,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:35,323 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:35,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:27:35,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899332248] [2021-06-06 00:27:35,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899332248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:35,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452005107] [2021-06-06 00:27:35,323 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:35,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:35,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:27:35,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:27:35,470 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:35,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452005107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:35,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:27:35,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 18 [2021-06-06 00:27:35,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884508480] [2021-06-06 00:27:35,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:27:35,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:27:35,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:27:35,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:27:35,472 INFO L87 Difference]: Start difference. First operand 28222 states and 101135 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:36,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:27:36,732 INFO L93 Difference]: Finished difference Result 58747 states and 196828 transitions. [2021-06-06 00:27:36,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-06 00:27:36,732 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:27:36,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:27:36,866 INFO L225 Difference]: With dead ends: 58747 [2021-06-06 00:27:36,866 INFO L226 Difference]: Without dead ends: 58747 [2021-06-06 00:27:36,866 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1353 ImplicationChecksByTransitivity, 596.2ms TimeCoverageRelationStatistics Valid=896, Invalid=2886, Unknown=0, NotChecked=0, Total=3782 [2021-06-06 00:27:36,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58747 states. [2021-06-06 00:27:37,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58747 to 28292. [2021-06-06 00:27:37,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28292 states, 28291 states have (on average 3.583259693895585) internal successors, (101374), 28291 states have internal predecessors, (101374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:38,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28292 states to 28292 states and 101374 transitions. [2021-06-06 00:27:38,043 INFO L78 Accepts]: Start accepts. Automaton has 28292 states and 101374 transitions. Word has length 36 [2021-06-06 00:27:38,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:27:38,043 INFO L482 AbstractCegarLoop]: Abstraction has 28292 states and 101374 transitions. [2021-06-06 00:27:38,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:38,043 INFO L276 IsEmpty]: Start isEmpty. Operand 28292 states and 101374 transitions. [2021-06-06 00:27:38,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:27:38,086 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:27:38,086 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:27:38,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:38,287 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:27:38,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:27:38,287 INFO L82 PathProgramCache]: Analyzing trace with hash 769453752, now seen corresponding path program 140 times [2021-06-06 00:27:38,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:27:38,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847417707] [2021-06-06 00:27:38,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:27:38,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:38,349 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:38,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:27:38,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847417707] [2021-06-06 00:27:38,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847417707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:38,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135691485] [2021-06-06 00:27:38,350 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 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:38,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:27:38,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:27:38,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-06 00:27:38,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:27:38,472 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:27:38,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135691485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:38,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:27:38,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 18 [2021-06-06 00:27:38,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680676089] [2021-06-06 00:27:38,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:27:38,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:27:38,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:27:38,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:27:38,472 INFO L87 Difference]: Start difference. First operand 28292 states and 101374 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:40,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:27:40,275 INFO L93 Difference]: Finished difference Result 58143 states and 196081 transitions. [2021-06-06 00:27:40,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-06-06 00:27:40,276 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:27:40,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:27:40,580 INFO L225 Difference]: With dead ends: 58143 [2021-06-06 00:27:40,580 INFO L226 Difference]: Without dead ends: 57927 [2021-06-06 00:27:40,581 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3120 ImplicationChecksByTransitivity, 1152.9ms TimeCoverageRelationStatistics Valid=1531, Invalid=7211, Unknown=0, NotChecked=0, Total=8742 [2021-06-06 00:27:40,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57927 states. [2021-06-06 00:27:41,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57927 to 28406. [2021-06-06 00:27:41,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28406 states, 28405 states have (on average 3.5803907762717833) internal successors, (101701), 28405 states have internal predecessors, (101701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:41,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28406 states to 28406 states and 101701 transitions. [2021-06-06 00:27:41,485 INFO L78 Accepts]: Start accepts. Automaton has 28406 states and 101701 transitions. Word has length 36 [2021-06-06 00:27:41,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:27:41,485 INFO L482 AbstractCegarLoop]: Abstraction has 28406 states and 101701 transitions. [2021-06-06 00:27:41,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:41,485 INFO L276 IsEmpty]: Start isEmpty. Operand 28406 states and 101701 transitions. [2021-06-06 00:27:41,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:27:41,526 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:27:41,526 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:27:41,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2021-06-06 00:27:41,727 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:27:41,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:27:41,727 INFO L82 PathProgramCache]: Analyzing trace with hash 851907644, now seen corresponding path program 141 times [2021-06-06 00:27:41,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:27:41,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340528312] [2021-06-06 00:27:41,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:27:41,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:41,785 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:41,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:27:41,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340528312] [2021-06-06 00:27:41,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340528312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:41,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062594420] [2021-06-06 00:27:41,786 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 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:41,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-06 00:27:41,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:27:41,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:27:41,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:27:41,906 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:41,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062594420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:41,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:27:41,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-06-06 00:27:41,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018940873] [2021-06-06 00:27:41,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:27:41,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:27:41,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:27:41,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:27:41,907 INFO L87 Difference]: Start difference. First operand 28406 states and 101701 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:42,258 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 11 [2021-06-06 00:27:43,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:27:43,872 INFO L93 Difference]: Finished difference Result 56244 states and 191794 transitions. [2021-06-06 00:27:43,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-06-06 00:27:43,873 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:27:43,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:27:44,007 INFO L225 Difference]: With dead ends: 56244 [2021-06-06 00:27:44,007 INFO L226 Difference]: Without dead ends: 56088 [2021-06-06 00:27:44,007 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3741 ImplicationChecksByTransitivity, 1196.5ms TimeCoverageRelationStatistics Valid=1746, Invalid=8154, Unknown=0, NotChecked=0, Total=9900 [2021-06-06 00:27:44,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56088 states. [2021-06-06 00:27:44,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56088 to 28858. [2021-06-06 00:27:44,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28858 states, 28857 states have (on average 3.5620819905049035) internal successors, (102791), 28857 states have internal predecessors, (102791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:45,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28858 states to 28858 states and 102791 transitions. [2021-06-06 00:27:45,033 INFO L78 Accepts]: Start accepts. Automaton has 28858 states and 102791 transitions. Word has length 36 [2021-06-06 00:27:45,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:27:45,033 INFO L482 AbstractCegarLoop]: Abstraction has 28858 states and 102791 transitions. [2021-06-06 00:27:45,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:45,033 INFO L276 IsEmpty]: Start isEmpty. Operand 28858 states and 102791 transitions. [2021-06-06 00:27:45,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:27:45,077 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:27:45,077 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:27:45,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:45,277 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:27:45,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:27:45,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1657232324, now seen corresponding path program 142 times [2021-06-06 00:27:45,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:27:45,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381282281] [2021-06-06 00:27:45,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:27:45,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:45,337 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:45,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:27:45,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381282281] [2021-06-06 00:27:45,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381282281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:45,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257768579] [2021-06-06 00:27:45,337 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 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:45,362 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:27:45,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:27:45,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-06 00:27:45,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:27:45,503 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:27:45,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257768579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:45,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:27:45,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-06-06 00:27:45,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925995593] [2021-06-06 00:27:45,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:27:45,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:27:45,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:27:45,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:27:45,504 INFO L87 Difference]: Start difference. First operand 28858 states and 102791 transitions. Second operand has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:45,885 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 9 [2021-06-06 00:27:48,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:27:48,469 INFO L93 Difference]: Finished difference Result 62328 states and 208262 transitions. [2021-06-06 00:27:48,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2021-06-06 00:27:48,469 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:27:48,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:27:48,606 INFO L225 Difference]: With dead ends: 62328 [2021-06-06 00:27:48,606 INFO L226 Difference]: Without dead ends: 62328 [2021-06-06 00:27:48,607 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10889 ImplicationChecksByTransitivity, 2029.4ms TimeCoverageRelationStatistics Valid=4101, Invalid=20705, Unknown=0, NotChecked=0, Total=24806 [2021-06-06 00:27:48,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62328 states. [2021-06-06 00:27:49,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62328 to 31970. [2021-06-06 00:27:49,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31970 states, 31969 states have (on average 3.5039882386061496) internal successors, (112019), 31969 states have internal predecessors, (112019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:49,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31970 states to 31970 states and 112019 transitions. [2021-06-06 00:27:49,896 INFO L78 Accepts]: Start accepts. Automaton has 31970 states and 112019 transitions. Word has length 36 [2021-06-06 00:27:49,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:27:49,896 INFO L482 AbstractCegarLoop]: Abstraction has 31970 states and 112019 transitions. [2021-06-06 00:27:49,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:49,896 INFO L276 IsEmpty]: Start isEmpty. Operand 31970 states and 112019 transitions. [2021-06-06 00:27:49,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:27:49,942 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:27:49,942 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:27:50,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:50,143 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:27:50,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:27:50,143 INFO L82 PathProgramCache]: Analyzing trace with hash 894177490, now seen corresponding path program 143 times [2021-06-06 00:27:50,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:27:50,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481268825] [2021-06-06 00:27:50,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:27:50,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:50,216 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:50,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:27:50,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481268825] [2021-06-06 00:27:50,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481268825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:50,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556690307] [2021-06-06 00:27:50,217 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 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:50,245 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-06 00:27:50,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:27:50,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-06 00:27:50,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:27:50,376 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:27:50,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556690307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:50,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:27:50,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-06-06 00:27:50,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645299102] [2021-06-06 00:27:50,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:27:50,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:27:50,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:27:50,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:27:50,377 INFO L87 Difference]: Start difference. First operand 31970 states and 112019 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:51,567 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 15 [2021-06-06 00:27:52,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:27:52,059 INFO L93 Difference]: Finished difference Result 58961 states and 202100 transitions. [2021-06-06 00:27:52,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-06 00:27:52,066 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:27:52,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:27:52,192 INFO L225 Difference]: With dead ends: 58961 [2021-06-06 00:27:52,192 INFO L226 Difference]: Without dead ends: 58937 [2021-06-06 00:27:52,193 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2552 ImplicationChecksByTransitivity, 1081.9ms TimeCoverageRelationStatistics Valid=1411, Invalid=5561, Unknown=0, NotChecked=0, Total=6972 [2021-06-06 00:27:52,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58937 states. [2021-06-06 00:27:53,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58937 to 33178. [2021-06-06 00:27:53,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33178 states, 33177 states have (on average 3.5047774060343007) internal successors, (116278), 33177 states have internal predecessors, (116278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:53,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33178 states to 33178 states and 116278 transitions. [2021-06-06 00:27:53,384 INFO L78 Accepts]: Start accepts. Automaton has 33178 states and 116278 transitions. Word has length 36 [2021-06-06 00:27:53,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:27:53,384 INFO L482 AbstractCegarLoop]: Abstraction has 33178 states and 116278 transitions. [2021-06-06 00:27:53,384 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:53,384 INFO L276 IsEmpty]: Start isEmpty. Operand 33178 states and 116278 transitions. [2021-06-06 00:27:53,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:27:53,448 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:27:53,448 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:27:53,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:53,649 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:27:53,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:27:53,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1472010922, now seen corresponding path program 144 times [2021-06-06 00:27:53,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:27:53,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977784112] [2021-06-06 00:27:53,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:27:53,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:53,698 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:53,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:27:53,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977784112] [2021-06-06 00:27:53,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977784112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:53,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967095881] [2021-06-06 00:27:53,699 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:53,726 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-06 00:27:53,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:27:53,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:27:53,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:27:53,864 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:53,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967095881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:53,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:27:53,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-06 00:27:53,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15948765] [2021-06-06 00:27:53,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:27:53,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:27:53,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:27:53,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:27:53,865 INFO L87 Difference]: Start difference. First operand 33178 states and 116278 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:55,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:27:55,581 INFO L93 Difference]: Finished difference Result 61380 states and 207685 transitions. [2021-06-06 00:27:55,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-06 00:27:55,582 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:27:55,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:27:55,718 INFO L225 Difference]: With dead ends: 61380 [2021-06-06 00:27:55,718 INFO L226 Difference]: Without dead ends: 61356 [2021-06-06 00:27:55,718 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2596 ImplicationChecksByTransitivity, 929.2ms TimeCoverageRelationStatistics Valid=1508, Invalid=5464, Unknown=0, NotChecked=0, Total=6972 [2021-06-06 00:27:55,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61356 states. [2021-06-06 00:27:56,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61356 to 33587. [2021-06-06 00:27:56,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33587 states, 33586 states have (on average 3.5085750014887154) internal successors, (117839), 33586 states have internal predecessors, (117839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:56,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33587 states to 33587 states and 117839 transitions. [2021-06-06 00:27:56,740 INFO L78 Accepts]: Start accepts. Automaton has 33587 states and 117839 transitions. Word has length 36 [2021-06-06 00:27:56,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:27:56,740 INFO L482 AbstractCegarLoop]: Abstraction has 33587 states and 117839 transitions. [2021-06-06 00:27:56,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:56,740 INFO L276 IsEmpty]: Start isEmpty. Operand 33587 states and 117839 transitions. [2021-06-06 00:27:56,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:27:56,787 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:27:56,787 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:27:56,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:56,988 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:27:56,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:27:56,988 INFO L82 PathProgramCache]: Analyzing trace with hash 44374, now seen corresponding path program 145 times [2021-06-06 00:27:56,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:27:56,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566852829] [2021-06-06 00:27:56,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:27:56,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:57,037 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:57,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:27:57,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566852829] [2021-06-06 00:27:57,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566852829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:57,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780058704] [2021-06-06 00:27:57,037 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 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:57,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:57,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-06 00:27:57,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:27:57,199 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:27:57,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780058704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:57,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:27:57,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-06 00:27:57,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584037896] [2021-06-06 00:27:57,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:27:57,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:27:57,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:27:57,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:27:57,200 INFO L87 Difference]: Start difference. First operand 33587 states and 117839 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:59,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:27:59,492 INFO L93 Difference]: Finished difference Result 68170 states and 230143 transitions. [2021-06-06 00:27:59,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-06-06 00:27:59,493 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:27:59,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:27:59,661 INFO L225 Difference]: With dead ends: 68170 [2021-06-06 00:27:59,661 INFO L226 Difference]: Without dead ends: 68134 [2021-06-06 00:27:59,662 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4640 ImplicationChecksByTransitivity, 1444.1ms TimeCoverageRelationStatistics Valid=2536, Invalid=9236, Unknown=0, NotChecked=0, Total=11772 [2021-06-06 00:27:59,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68134 states. [2021-06-06 00:28:00,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68134 to 33436. [2021-06-06 00:28:00,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33436 states, 33435 states have (on average 3.5040526394496783) internal successors, (117158), 33435 states have internal predecessors, (117158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:00,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33436 states to 33436 states and 117158 transitions. [2021-06-06 00:28:00,869 INFO L78 Accepts]: Start accepts. Automaton has 33436 states and 117158 transitions. Word has length 36 [2021-06-06 00:28:00,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:00,869 INFO L482 AbstractCegarLoop]: Abstraction has 33436 states and 117158 transitions. [2021-06-06 00:28:00,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:00,869 INFO L276 IsEmpty]: Start isEmpty. Operand 33436 states and 117158 transitions. [2021-06-06 00:28:00,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:28:00,916 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:00,916 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:01,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable176 [2021-06-06 00:28:01,116 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:01,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:01,116 INFO L82 PathProgramCache]: Analyzing trace with hash -988740176, now seen corresponding path program 146 times [2021-06-06 00:28:01,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:01,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786224125] [2021-06-06 00:28:01,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:01,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:01,176 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:01,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:01,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786224125] [2021-06-06 00:28:01,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786224125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:01,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295794819] [2021-06-06 00:28:01,176 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:01,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:28:01,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:28:01,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-06 00:28:01,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:01,328 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:28:01,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295794819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:01,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:01,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-06 00:28:01,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8136712] [2021-06-06 00:28:01,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:28:01,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:01,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:28:01,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:28:01,329 INFO L87 Difference]: Start difference. First operand 33436 states and 117158 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:03,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:03,163 INFO L93 Difference]: Finished difference Result 71028 states and 243828 transitions. [2021-06-06 00:28:03,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-06 00:28:03,163 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:28:03,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:03,327 INFO L225 Difference]: With dead ends: 71028 [2021-06-06 00:28:03,327 INFO L226 Difference]: Without dead ends: 70956 [2021-06-06 00:28:03,328 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3221 ImplicationChecksByTransitivity, 997.5ms TimeCoverageRelationStatistics Valid=1558, Invalid=7184, Unknown=0, NotChecked=0, Total=8742 [2021-06-06 00:28:03,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70956 states. [2021-06-06 00:28:04,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70956 to 33879. [2021-06-06 00:28:04,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33879 states, 33878 states have (on average 3.507792667808017) internal successors, (118837), 33878 states have internal predecessors, (118837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:04,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33879 states to 33879 states and 118837 transitions. [2021-06-06 00:28:04,691 INFO L78 Accepts]: Start accepts. Automaton has 33879 states and 118837 transitions. Word has length 36 [2021-06-06 00:28:04,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:04,691 INFO L482 AbstractCegarLoop]: Abstraction has 33879 states and 118837 transitions. [2021-06-06 00:28:04,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:04,691 INFO L276 IsEmpty]: Start isEmpty. Operand 33879 states and 118837 transitions. [2021-06-06 00:28:04,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:28:04,744 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:04,744 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:04,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-06-06 00:28:04,945 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:04,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:04,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1272413260, now seen corresponding path program 147 times [2021-06-06 00:28:04,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:04,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037501488] [2021-06-06 00:28:04,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:04,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:05,011 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:05,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:05,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037501488] [2021-06-06 00:28:05,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037501488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:05,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372041962] [2021-06-06 00:28:05,012 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 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:05,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-06 00:28:05,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:28:05,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:28:05,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:05,168 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:05,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372041962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:05,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:05,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-06 00:28:05,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013019879] [2021-06-06 00:28:05,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:28:05,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:05,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:28:05,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:28:05,169 INFO L87 Difference]: Start difference. First operand 33879 states and 118837 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:07,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:07,102 INFO L93 Difference]: Finished difference Result 72468 states and 247783 transitions. [2021-06-06 00:28:07,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-06-06 00:28:07,103 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:28:07,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:07,274 INFO L225 Difference]: With dead ends: 72468 [2021-06-06 00:28:07,274 INFO L226 Difference]: Without dead ends: 72348 [2021-06-06 00:28:07,274 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3012 ImplicationChecksByTransitivity, 1019.2ms TimeCoverageRelationStatistics Valid=1503, Invalid=6869, Unknown=0, NotChecked=0, Total=8372 [2021-06-06 00:28:07,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72348 states. [2021-06-06 00:28:08,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72348 to 36408. [2021-06-06 00:28:08,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36408 states, 36407 states have (on average 3.501606833850633) internal successors, (127483), 36407 states have internal predecessors, (127483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:08,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36408 states to 36408 states and 127483 transitions. [2021-06-06 00:28:08,571 INFO L78 Accepts]: Start accepts. Automaton has 36408 states and 127483 transitions. Word has length 36 [2021-06-06 00:28:08,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:08,571 INFO L482 AbstractCegarLoop]: Abstraction has 36408 states and 127483 transitions. [2021-06-06 00:28:08,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:08,571 INFO L276 IsEmpty]: Start isEmpty. Operand 36408 states and 127483 transitions. [2021-06-06 00:28:08,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:28:08,827 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:08,827 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:09,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-06-06 00:28:09,033 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:09,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:09,033 INFO L82 PathProgramCache]: Analyzing trace with hash 995659960, now seen corresponding path program 148 times [2021-06-06 00:28:09,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:09,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865691455] [2021-06-06 00:28:09,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:09,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:09,095 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:09,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:09,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865691455] [2021-06-06 00:28:09,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865691455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:09,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482728529] [2021-06-06 00:28:09,095 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:09,118 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:28:09,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:28:09,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-06 00:28:09,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:09,222 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:28:09,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482728529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:09,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:09,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-06-06 00:28:09,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959575489] [2021-06-06 00:28:09,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:28:09,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:09,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:28:09,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:28:09,223 INFO L87 Difference]: Start difference. First operand 36408 states and 127483 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:10,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:10,954 INFO L93 Difference]: Finished difference Result 71896 states and 245531 transitions. [2021-06-06 00:28:10,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-06 00:28:10,954 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:28:10,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:11,112 INFO L225 Difference]: With dead ends: 71896 [2021-06-06 00:28:11,112 INFO L226 Difference]: Without dead ends: 71728 [2021-06-06 00:28:11,113 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2683 ImplicationChecksByTransitivity, 910.5ms TimeCoverageRelationStatistics Valid=1382, Invalid=6274, Unknown=0, NotChecked=0, Total=7656 [2021-06-06 00:28:11,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71728 states. [2021-06-06 00:28:12,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71728 to 37315. [2021-06-06 00:28:12,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37315 states, 37314 states have (on average 3.4974272391059658) internal successors, (130503), 37314 states have internal predecessors, (130503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:12,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37315 states to 37315 states and 130503 transitions. [2021-06-06 00:28:12,368 INFO L78 Accepts]: Start accepts. Automaton has 37315 states and 130503 transitions. Word has length 36 [2021-06-06 00:28:12,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:12,368 INFO L482 AbstractCegarLoop]: Abstraction has 37315 states and 130503 transitions. [2021-06-06 00:28:12,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:12,368 INFO L276 IsEmpty]: Start isEmpty. Operand 37315 states and 130503 transitions. [2021-06-06 00:28:12,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:28:12,422 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:12,422 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:12,622 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-06-06 00:28:12,622 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:12,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:12,623 INFO L82 PathProgramCache]: Analyzing trace with hash 652323388, now seen corresponding path program 149 times [2021-06-06 00:28:12,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:12,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831923378] [2021-06-06 00:28:12,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:12,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:12,671 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:12,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:12,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831923378] [2021-06-06 00:28:12,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831923378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:12,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891520955] [2021-06-06 00:28:12,672 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:12,698 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-06 00:28:12,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:28:12,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:28:12,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:12,818 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:12,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891520955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:12,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:12,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-06-06 00:28:12,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210991924] [2021-06-06 00:28:12,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:28:12,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:12,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:28:12,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:28:12,819 INFO L87 Difference]: Start difference. First operand 37315 states and 130503 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:13,734 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2021-06-06 00:28:14,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:14,971 INFO L93 Difference]: Finished difference Result 70630 states and 238604 transitions. [2021-06-06 00:28:14,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-06-06 00:28:14,972 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:28:14,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:15,136 INFO L225 Difference]: With dead ends: 70630 [2021-06-06 00:28:15,137 INFO L226 Difference]: Without dead ends: 70602 [2021-06-06 00:28:15,138 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4331 ImplicationChecksByTransitivity, 1368.5ms TimeCoverageRelationStatistics Valid=2360, Invalid=8770, Unknown=0, NotChecked=0, Total=11130 [2021-06-06 00:28:15,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70602 states. [2021-06-06 00:28:16,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70602 to 37553. [2021-06-06 00:28:16,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37553 states, 37552 states have (on average 3.4914518534299104) internal successors, (131111), 37552 states have internal predecessors, (131111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:16,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37553 states to 37553 states and 131111 transitions. [2021-06-06 00:28:16,573 INFO L78 Accepts]: Start accepts. Automaton has 37553 states and 131111 transitions. Word has length 36 [2021-06-06 00:28:16,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:16,573 INFO L482 AbstractCegarLoop]: Abstraction has 37553 states and 131111 transitions. [2021-06-06 00:28:16,573 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:16,573 INFO L276 IsEmpty]: Start isEmpty. Operand 37553 states and 131111 transitions. [2021-06-06 00:28:16,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:28:16,633 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:16,633 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:16,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:16,833 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:16,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:16,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1629303304, now seen corresponding path program 150 times [2021-06-06 00:28:16,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:16,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016876592] [2021-06-06 00:28:16,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:16,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:16,887 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:16,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:16,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016876592] [2021-06-06 00:28:16,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016876592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:16,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475041578] [2021-06-06 00:28:16,888 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:16,913 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:28:16,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:28:16,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:28:16,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:17,028 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:17,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475041578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:17,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:17,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 18 [2021-06-06 00:28:17,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847985684] [2021-06-06 00:28:17,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:28:17,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:17,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:28:17,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:28:17,029 INFO L87 Difference]: Start difference. First operand 37553 states and 131111 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:18,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:18,840 INFO L93 Difference]: Finished difference Result 64800 states and 219489 transitions. [2021-06-06 00:28:18,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-06 00:28:18,840 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:28:18,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:18,984 INFO L225 Difference]: With dead ends: 64800 [2021-06-06 00:28:18,984 INFO L226 Difference]: Without dead ends: 64752 [2021-06-06 00:28:18,985 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2640 ImplicationChecksByTransitivity, 900.8ms TimeCoverageRelationStatistics Valid=1456, Invalid=5854, Unknown=0, NotChecked=0, Total=7310 [2021-06-06 00:28:19,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64752 states. [2021-06-06 00:28:20,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64752 to 38003. [2021-06-06 00:28:20,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38003 states, 38002 states have (on average 3.4817641176780167) internal successors, (132314), 38002 states have internal predecessors, (132314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:20,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38003 states to 38003 states and 132314 transitions. [2021-06-06 00:28:20,191 INFO L78 Accepts]: Start accepts. Automaton has 38003 states and 132314 transitions. Word has length 36 [2021-06-06 00:28:20,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:20,191 INFO L482 AbstractCegarLoop]: Abstraction has 38003 states and 132314 transitions. [2021-06-06 00:28:20,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:20,192 INFO L276 IsEmpty]: Start isEmpty. Operand 38003 states and 132314 transitions. [2021-06-06 00:28:20,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:28:20,245 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:20,245 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:20,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:20,445 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:20,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:20,446 INFO L82 PathProgramCache]: Analyzing trace with hash -971366648, now seen corresponding path program 151 times [2021-06-06 00:28:20,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:20,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414292803] [2021-06-06 00:28:20,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:20,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:20,506 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:20,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:20,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414292803] [2021-06-06 00:28:20,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414292803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:20,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196663681] [2021-06-06 00:28:20,507 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 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:20,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:20,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-06 00:28:20,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:20,623 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:28:20,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196663681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:20,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:20,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-06 00:28:20,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142682219] [2021-06-06 00:28:20,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:28:20,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:20,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:28:20,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:28:20,624 INFO L87 Difference]: Start difference. First operand 38003 states and 132314 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:21,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:21,973 INFO L93 Difference]: Finished difference Result 62672 states and 214949 transitions. [2021-06-06 00:28:21,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-06 00:28:21,974 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:28:21,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:22,115 INFO L225 Difference]: With dead ends: 62672 [2021-06-06 00:28:22,115 INFO L226 Difference]: Without dead ends: 62612 [2021-06-06 00:28:22,115 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1569 ImplicationChecksByTransitivity, 837.7ms TimeCoverageRelationStatistics Valid=939, Invalid=3891, Unknown=0, NotChecked=0, Total=4830 [2021-06-06 00:28:22,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62612 states. [2021-06-06 00:28:23,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62612 to 38019. [2021-06-06 00:28:23,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38019 states, 38018 states have (on average 3.4814561523488874) internal successors, (132358), 38018 states have internal predecessors, (132358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:23,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38019 states to 38019 states and 132358 transitions. [2021-06-06 00:28:23,335 INFO L78 Accepts]: Start accepts. Automaton has 38019 states and 132358 transitions. Word has length 36 [2021-06-06 00:28:23,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:23,335 INFO L482 AbstractCegarLoop]: Abstraction has 38019 states and 132358 transitions. [2021-06-06 00:28:23,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:23,336 INFO L276 IsEmpty]: Start isEmpty. Operand 38019 states and 132358 transitions. [2021-06-06 00:28:23,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:28:23,395 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:23,395 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:23,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:23,596 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:23,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:23,596 INFO L82 PathProgramCache]: Analyzing trace with hash 613711262, now seen corresponding path program 152 times [2021-06-06 00:28:23,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:23,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985046379] [2021-06-06 00:28:23,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:23,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:23,649 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:23,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:23,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985046379] [2021-06-06 00:28:23,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985046379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:23,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426558406] [2021-06-06 00:28:23,649 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 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:23,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:28:23,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:28:23,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-06 00:28:23,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:23,754 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:28:23,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426558406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:23,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:23,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 16 [2021-06-06 00:28:23,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205939523] [2021-06-06 00:28:23,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:28:23,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:23,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:28:23,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:28:23,755 INFO L87 Difference]: Start difference. First operand 38019 states and 132358 transitions. Second operand has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:25,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:25,419 INFO L93 Difference]: Finished difference Result 63919 states and 217939 transitions. [2021-06-06 00:28:25,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-06-06 00:28:25,419 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:28:25,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:25,563 INFO L225 Difference]: With dead ends: 63919 [2021-06-06 00:28:25,563 INFO L226 Difference]: Without dead ends: 63879 [2021-06-06 00:28:25,564 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3003 ImplicationChecksByTransitivity, 891.0ms TimeCoverageRelationStatistics Valid=1540, Invalid=6470, Unknown=0, NotChecked=0, Total=8010 [2021-06-06 00:28:25,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63879 states. [2021-06-06 00:28:26,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63879 to 38411. [2021-06-06 00:28:26,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38411 states, 38410 states have (on average 3.478104660244728) internal successors, (133594), 38410 states have internal predecessors, (133594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:26,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38411 states to 38411 states and 133594 transitions. [2021-06-06 00:28:26,718 INFO L78 Accepts]: Start accepts. Automaton has 38411 states and 133594 transitions. Word has length 36 [2021-06-06 00:28:26,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:26,718 INFO L482 AbstractCegarLoop]: Abstraction has 38411 states and 133594 transitions. [2021-06-06 00:28:26,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:26,718 INFO L276 IsEmpty]: Start isEmpty. Operand 38411 states and 133594 transitions. [2021-06-06 00:28:26,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:28:26,774 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:26,774 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:26,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2021-06-06 00:28:26,975 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:26,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:26,975 INFO L82 PathProgramCache]: Analyzing trace with hash -544224248, now seen corresponding path program 153 times [2021-06-06 00:28:26,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:26,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124242106] [2021-06-06 00:28:26,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:26,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:27,035 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:27,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:27,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124242106] [2021-06-06 00:28:27,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124242106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:27,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788318523] [2021-06-06 00:28:27,035 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:27,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-06 00:28:27,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:28:27,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:28:27,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:27,368 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:27,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788318523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:27,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:27,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 17 [2021-06-06 00:28:27,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073926380] [2021-06-06 00:28:27,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:28:27,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:27,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:28:27,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:28:27,369 INFO L87 Difference]: Start difference. First operand 38411 states and 133594 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:28,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:28,943 INFO L93 Difference]: Finished difference Result 65073 states and 222032 transitions. [2021-06-06 00:28:28,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-06 00:28:28,944 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:28:28,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:29,089 INFO L225 Difference]: With dead ends: 65073 [2021-06-06 00:28:29,089 INFO L226 Difference]: Without dead ends: 64989 [2021-06-06 00:28:29,090 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2584 ImplicationChecksByTransitivity, 897.0ms TimeCoverageRelationStatistics Valid=1344, Invalid=6138, Unknown=0, NotChecked=0, Total=7482 [2021-06-06 00:28:29,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64989 states. [2021-06-06 00:28:30,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64989 to 39127. [2021-06-06 00:28:30,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39127 states, 39126 states have (on average 3.468639779174973) internal successors, (135714), 39126 states have internal predecessors, (135714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:30,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39127 states to 39127 states and 135714 transitions. [2021-06-06 00:28:30,568 INFO L78 Accepts]: Start accepts. Automaton has 39127 states and 135714 transitions. Word has length 36 [2021-06-06 00:28:30,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:30,569 INFO L482 AbstractCegarLoop]: Abstraction has 39127 states and 135714 transitions. [2021-06-06 00:28:30,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:30,569 INFO L276 IsEmpty]: Start isEmpty. Operand 39127 states and 135714 transitions. [2021-06-06 00:28:30,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:28:30,623 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:30,623 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:30,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:30,823 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:30,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:30,823 INFO L82 PathProgramCache]: Analyzing trace with hash -93570350, now seen corresponding path program 154 times [2021-06-06 00:28:30,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:30,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708242864] [2021-06-06 00:28:30,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:30,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:30,866 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:30,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:30,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708242864] [2021-06-06 00:28:30,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708242864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:30,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583703570] [2021-06-06 00:28:30,866 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 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:30,893 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:28:30,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:28:30,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:28:30,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:31,036 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:31,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583703570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:31,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:31,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-06-06 00:28:31,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641045951] [2021-06-06 00:28:31,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:28:31,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:31,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:28:31,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:28:31,036 INFO L87 Difference]: Start difference. First operand 39127 states and 135714 transitions. Second operand has 20 states, 20 states have (on average 2.9) internal successors, (58), 20 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:32,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:32,526 INFO L93 Difference]: Finished difference Result 102660 states and 349317 transitions. [2021-06-06 00:28:32,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-06 00:28:32,529 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 20 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:28:32,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:32,762 INFO L225 Difference]: With dead ends: 102660 [2021-06-06 00:28:32,762 INFO L226 Difference]: Without dead ends: 102660 [2021-06-06 00:28:32,763 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 497.4ms TimeCoverageRelationStatistics Valid=759, Invalid=1791, Unknown=0, NotChecked=0, Total=2550 [2021-06-06 00:28:32,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102660 states. [2021-06-06 00:28:34,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102660 to 43208. [2021-06-06 00:28:34,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43208 states, 43207 states have (on average 3.5571550906103178) internal successors, (153694), 43207 states have internal predecessors, (153694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:34,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43208 states to 43208 states and 153694 transitions. [2021-06-06 00:28:34,390 INFO L78 Accepts]: Start accepts. Automaton has 43208 states and 153694 transitions. Word has length 36 [2021-06-06 00:28:34,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:34,391 INFO L482 AbstractCegarLoop]: Abstraction has 43208 states and 153694 transitions. [2021-06-06 00:28:34,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 20 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:34,391 INFO L276 IsEmpty]: Start isEmpty. Operand 43208 states and 153694 transitions. [2021-06-06 00:28:34,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:28:34,450 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:34,450 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:34,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,185 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:34,650 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:34,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:34,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1644681102, now seen corresponding path program 155 times [2021-06-06 00:28:34,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:34,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930303011] [2021-06-06 00:28:34,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:34,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:34,713 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:34,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:34,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930303011] [2021-06-06 00:28:34,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930303011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:34,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498640986] [2021-06-06 00:28:34,713 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 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:34,739 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-06 00:28:34,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:28:34,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:28:34,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:34,882 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:34,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498640986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:34,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:34,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-06 00:28:34,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508023312] [2021-06-06 00:28:34,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:28:34,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:34,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:28:34,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:28:34,883 INFO L87 Difference]: Start difference. First operand 43208 states and 153694 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:35,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:35,831 INFO L93 Difference]: Finished difference Result 55934 states and 195854 transitions. [2021-06-06 00:28:35,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-06 00:28:35,832 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:28:35,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:35,968 INFO L225 Difference]: With dead ends: 55934 [2021-06-06 00:28:35,969 INFO L226 Difference]: Without dead ends: 55934 [2021-06-06 00:28:35,969 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 350.2ms TimeCoverageRelationStatistics Valid=289, Invalid=833, Unknown=0, NotChecked=0, Total=1122 [2021-06-06 00:28:36,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55934 states. [2021-06-06 00:28:37,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55934 to 44080. [2021-06-06 00:28:37,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44080 states, 44079 states have (on average 3.5467229292860547) internal successors, (156336), 44079 states have internal predecessors, (156336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:37,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44080 states to 44080 states and 156336 transitions. [2021-06-06 00:28:37,250 INFO L78 Accepts]: Start accepts. Automaton has 44080 states and 156336 transitions. Word has length 36 [2021-06-06 00:28:37,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:37,250 INFO L482 AbstractCegarLoop]: Abstraction has 44080 states and 156336 transitions. [2021-06-06 00:28:37,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:37,250 INFO L276 IsEmpty]: Start isEmpty. Operand 44080 states and 156336 transitions. [2021-06-06 00:28:37,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:28:37,313 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:37,313 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:37,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:37,514 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:37,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:37,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1465950898, now seen corresponding path program 156 times [2021-06-06 00:28:37,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:37,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131619147] [2021-06-06 00:28:37,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:37,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:37,572 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:37,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:37,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131619147] [2021-06-06 00:28:37,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131619147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:37,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619454243] [2021-06-06 00:28:37,572 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 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:37,632 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-06 00:28:37,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:28:37,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:28:37,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:37,759 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:37,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619454243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:37,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:37,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-06 00:28:37,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537815830] [2021-06-06 00:28:37,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:28:37,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:37,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:28:37,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:28:37,760 INFO L87 Difference]: Start difference. First operand 44080 states and 156336 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:38,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:38,501 INFO L93 Difference]: Finished difference Result 55590 states and 194951 transitions. [2021-06-06 00:28:38,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-06 00:28:38,502 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:28:38,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:38,639 INFO L225 Difference]: With dead ends: 55590 [2021-06-06 00:28:38,639 INFO L226 Difference]: Without dead ends: 55586 [2021-06-06 00:28:38,640 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 204.5ms TimeCoverageRelationStatistics Valid=158, Invalid=492, Unknown=0, NotChecked=0, Total=650 [2021-06-06 00:28:38,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55586 states. [2021-06-06 00:28:39,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55586 to 44002. [2021-06-06 00:28:39,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44002 states, 44001 states have (on average 3.5471693825140336) internal successors, (156079), 44001 states have internal predecessors, (156079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:39,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44002 states to 44002 states and 156079 transitions. [2021-06-06 00:28:39,793 INFO L78 Accepts]: Start accepts. Automaton has 44002 states and 156079 transitions. Word has length 36 [2021-06-06 00:28:39,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:39,793 INFO L482 AbstractCegarLoop]: Abstraction has 44002 states and 156079 transitions. [2021-06-06 00:28:39,793 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:39,793 INFO L276 IsEmpty]: Start isEmpty. Operand 44002 states and 156079 transitions. [2021-06-06 00:28:39,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:28:39,854 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:39,854 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:40,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:40,054 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:40,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:40,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1660404340, now seen corresponding path program 157 times [2021-06-06 00:28:40,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:40,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551624838] [2021-06-06 00:28:40,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:40,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:40,102 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:40,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:40,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551624838] [2021-06-06 00:28:40,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551624838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:40,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20945605] [2021-06-06 00:28:40,103 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 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:40,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:40,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-06 00:28:40,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:40,264 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:28:40,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20945605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:40,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:40,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-06 00:28:40,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530701113] [2021-06-06 00:28:40,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:28:40,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:40,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:28:40,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:28:40,265 INFO L87 Difference]: Start difference. First operand 44002 states and 156079 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:41,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:41,598 INFO L93 Difference]: Finished difference Result 55904 states and 195900 transitions. [2021-06-06 00:28:41,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-06 00:28:41,599 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:28:41,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:41,742 INFO L225 Difference]: With dead ends: 55904 [2021-06-06 00:28:41,743 INFO L226 Difference]: Without dead ends: 55888 [2021-06-06 00:28:41,743 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 769 ImplicationChecksByTransitivity, 587.2ms TimeCoverageRelationStatistics Valid=557, Invalid=2305, Unknown=0, NotChecked=0, Total=2862 [2021-06-06 00:28:41,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55888 states. [2021-06-06 00:28:42,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55888 to 43876. [2021-06-06 00:28:42,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43876 states, 43875 states have (on average 3.5484900284900287) internal successors, (155690), 43875 states have internal predecessors, (155690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:43,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43876 states to 43876 states and 155690 transitions. [2021-06-06 00:28:43,051 INFO L78 Accepts]: Start accepts. Automaton has 43876 states and 155690 transitions. Word has length 36 [2021-06-06 00:28:43,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:43,051 INFO L482 AbstractCegarLoop]: Abstraction has 43876 states and 155690 transitions. [2021-06-06 00:28:43,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:43,052 INFO L276 IsEmpty]: Start isEmpty. Operand 43876 states and 155690 transitions. [2021-06-06 00:28:43,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:28:43,115 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:43,115 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:43,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2021-06-06 00:28:43,315 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:43,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:43,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1074676232, now seen corresponding path program 158 times [2021-06-06 00:28:43,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:43,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548170581] [2021-06-06 00:28:43,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:43,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:43,362 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:43,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:43,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548170581] [2021-06-06 00:28:43,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548170581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:43,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094720323] [2021-06-06 00:28:43,362 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 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:43,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:28:43,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:28:43,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-06 00:28:43,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:43,552 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:28:43,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094720323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:43,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:43,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-06 00:28:43,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247103428] [2021-06-06 00:28:43,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:28:43,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:43,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:28:43,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:28:43,553 INFO L87 Difference]: Start difference. First operand 43876 states and 155690 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:44,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:44,850 INFO L93 Difference]: Finished difference Result 62055 states and 216765 transitions. [2021-06-06 00:28:44,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-06 00:28:44,850 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:28:44,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:45,315 INFO L225 Difference]: With dead ends: 62055 [2021-06-06 00:28:45,315 INFO L226 Difference]: Without dead ends: 62043 [2021-06-06 00:28:45,315 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1301 ImplicationChecksByTransitivity, 776.4ms TimeCoverageRelationStatistics Valid=806, Invalid=3354, Unknown=0, NotChecked=0, Total=4160 [2021-06-06 00:28:45,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62043 states. [2021-06-06 00:28:46,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62043 to 43875. [2021-06-06 00:28:46,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43875 states, 43874 states have (on average 3.55356247435839) internal successors, (155909), 43874 states have internal predecessors, (155909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:46,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43875 states to 43875 states and 155909 transitions. [2021-06-06 00:28:46,534 INFO L78 Accepts]: Start accepts. Automaton has 43875 states and 155909 transitions. Word has length 36 [2021-06-06 00:28:46,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:46,534 INFO L482 AbstractCegarLoop]: Abstraction has 43875 states and 155909 transitions. [2021-06-06 00:28:46,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:46,534 INFO L276 IsEmpty]: Start isEmpty. Operand 43875 states and 155909 transitions. [2021-06-06 00:28:46,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:28:46,593 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:46,593 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:46,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:46,794 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:46,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:46,794 INFO L82 PathProgramCache]: Analyzing trace with hash -208960008, now seen corresponding path program 159 times [2021-06-06 00:28:46,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:46,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206484599] [2021-06-06 00:28:46,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:46,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:46,845 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:46,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:46,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206484599] [2021-06-06 00:28:46,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206484599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:46,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675349737] [2021-06-06 00:28:46,845 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 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:46,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-06 00:28:46,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:28:46,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-06 00:28:46,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:46,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-06-06 00:28:46,974 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:28:46,981 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:46,982 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-06 00:28:46,982 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:27 [2021-06-06 00:28:47,021 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-06-06 00:28:47,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-06 00:28:47,022 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:28:47,033 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:47,036 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-06 00:28:47,036 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:40, output treesize:39 [2021-06-06 00:28:47,117 INFO L354 Elim1Store]: treesize reduction 52, result has 17.5 percent of original size [2021-06-06 00:28:47,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 32 [2021-06-06 00:28:47,118 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:28:47,129 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:47,132 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-06 00:28:47,132 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:45 [2021-06-06 00:28:47,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:28:47,223 INFO L354 Elim1Store]: treesize reduction 60, result has 15.5 percent of original size [2021-06-06 00:28:47,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 42 [2021-06-06 00:28:47,225 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:28:47,241 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:47,245 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-06 00:28:47,245 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:61, output treesize:60 [2021-06-06 00:28:47,396 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:28:47,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675349737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:47,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:47,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 25 [2021-06-06 00:28:47,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053400327] [2021-06-06 00:28:47,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-06 00:28:47,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:47,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-06 00:28:47,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-06-06 00:28:47,397 INFO L87 Difference]: Start difference. First operand 43875 states and 155909 transitions. Second operand has 25 states, 25 states have (on average 2.68) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:48,972 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 16 [2021-06-06 00:28:51,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:51,153 INFO L93 Difference]: Finished difference Result 63737 states and 220306 transitions. [2021-06-06 00:28:51,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-06-06 00:28:51,153 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:28:51,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:51,298 INFO L225 Difference]: With dead ends: 63737 [2021-06-06 00:28:51,298 INFO L226 Difference]: Without dead ends: 63678 [2021-06-06 00:28:51,299 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5115 ImplicationChecksByTransitivity, 2626.9ms TimeCoverageRelationStatistics Valid=1602, Invalid=12204, Unknown=0, NotChecked=0, Total=13806 [2021-06-06 00:28:51,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63678 states. [2021-06-06 00:28:52,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63678 to 44507. [2021-06-06 00:28:52,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44507 states, 44506 states have (on average 3.55304902709747) internal successors, (158132), 44506 states have internal predecessors, (158132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:52,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44507 states to 44507 states and 158132 transitions. [2021-06-06 00:28:52,567 INFO L78 Accepts]: Start accepts. Automaton has 44507 states and 158132 transitions. Word has length 36 [2021-06-06 00:28:52,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:52,567 INFO L482 AbstractCegarLoop]: Abstraction has 44507 states and 158132 transitions. [2021-06-06 00:28:52,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:52,567 INFO L276 IsEmpty]: Start isEmpty. Operand 44507 states and 158132 transitions. [2021-06-06 00:28:52,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:28:52,896 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:52,896 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:53,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-06-06 00:28:53,120 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:53,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:53,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1585932856, now seen corresponding path program 160 times [2021-06-06 00:28:53,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:53,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997937399] [2021-06-06 00:28:53,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:53,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:53,180 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:53,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:53,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997937399] [2021-06-06 00:28:53,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997937399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:53,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983162478] [2021-06-06 00:28:53,180 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 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:53,205 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:28:53,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:28:53,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:28:53,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:53,345 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:53,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983162478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:53,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:53,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-06 00:28:53,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856707558] [2021-06-06 00:28:53,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:28:53,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:53,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:28:53,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:28:53,346 INFO L87 Difference]: Start difference. First operand 44507 states and 158132 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:54,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:54,413 INFO L93 Difference]: Finished difference Result 80580 states and 276969 transitions. [2021-06-06 00:28:54,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-06 00:28:54,413 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:28:54,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:54,597 INFO L225 Difference]: With dead ends: 80580 [2021-06-06 00:28:54,597 INFO L226 Difference]: Without dead ends: 80580 [2021-06-06 00:28:54,598 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1037 ImplicationChecksByTransitivity, 514.2ms TimeCoverageRelationStatistics Valid=732, Invalid=2460, Unknown=0, NotChecked=0, Total=3192 [2021-06-06 00:28:54,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80580 states. [2021-06-06 00:28:56,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80580 to 46437. [2021-06-06 00:28:56,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46437 states, 46436 states have (on average 3.579894909122233) internal successors, (166236), 46436 states have internal predecessors, (166236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:56,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46437 states to 46437 states and 166236 transitions. [2021-06-06 00:28:56,325 INFO L78 Accepts]: Start accepts. Automaton has 46437 states and 166236 transitions. Word has length 36 [2021-06-06 00:28:56,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:56,325 INFO L482 AbstractCegarLoop]: Abstraction has 46437 states and 166236 transitions. [2021-06-06 00:28:56,325 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:56,325 INFO L276 IsEmpty]: Start isEmpty. Operand 46437 states and 166236 transitions. [2021-06-06 00:28:56,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:28:56,400 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:56,400 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:56,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:56,602 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:56,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:56,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1236979144, now seen corresponding path program 161 times [2021-06-06 00:28:56,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:56,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213789068] [2021-06-06 00:28:56,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:56,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:56,667 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:56,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:56,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213789068] [2021-06-06 00:28:56,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213789068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:56,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360621296] [2021-06-06 00:28:56,668 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 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:56,698 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-06 00:28:56,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:28:56,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:28:56,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:56,842 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:56,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360621296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:56,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:56,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-06 00:28:56,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369183934] [2021-06-06 00:28:56,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:28:56,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:56,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:28:56,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:28:56,843 INFO L87 Difference]: Start difference. First operand 46437 states and 166236 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:57,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:57,816 INFO L93 Difference]: Finished difference Result 86965 states and 298293 transitions. [2021-06-06 00:28:57,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-06 00:28:57,817 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:28:57,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:58,368 INFO L225 Difference]: With dead ends: 86965 [2021-06-06 00:28:58,368 INFO L226 Difference]: Without dead ends: 86965 [2021-06-06 00:28:58,368 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 407.8ms TimeCoverageRelationStatistics Valid=537, Invalid=1815, Unknown=0, NotChecked=0, Total=2352 [2021-06-06 00:28:58,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86965 states. [2021-06-06 00:28:59,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86965 to 46927. [2021-06-06 00:28:59,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46927 states, 46926 states have (on average 3.586327409112219) internal successors, (168292), 46926 states have internal predecessors, (168292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:59,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46927 states to 46927 states and 168292 transitions. [2021-06-06 00:28:59,889 INFO L78 Accepts]: Start accepts. Automaton has 46927 states and 168292 transitions. Word has length 36 [2021-06-06 00:28:59,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:59,889 INFO L482 AbstractCegarLoop]: Abstraction has 46927 states and 168292 transitions. [2021-06-06 00:28:59,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:59,889 INFO L276 IsEmpty]: Start isEmpty. Operand 46927 states and 168292 transitions. [2021-06-06 00:28:59,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:28:59,956 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:59,956 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:00,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:00,157 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:00,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:00,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1387961778, now seen corresponding path program 162 times [2021-06-06 00:29:00,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:00,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936947111] [2021-06-06 00:29:00,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:00,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:00,218 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:00,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:00,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936947111] [2021-06-06 00:29:00,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936947111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:00,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124742950] [2021-06-06 00:29:00,218 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 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:00,250 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-06 00:29:00,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:29:00,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:29:00,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:00,419 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:00,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124742950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:00,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:00,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-06 00:29:00,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269006083] [2021-06-06 00:29:00,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-06 00:29:00,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:00,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-06 00:29:00,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:29:00,420 INFO L87 Difference]: Start difference. First operand 46927 states and 168292 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:01,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:01,798 INFO L93 Difference]: Finished difference Result 85794 states and 294291 transitions. [2021-06-06 00:29:01,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-06 00:29:01,798 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:29:01,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:01,986 INFO L225 Difference]: With dead ends: 85794 [2021-06-06 00:29:01,986 INFO L226 Difference]: Without dead ends: 85794 [2021-06-06 00:29:01,987 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 430.0ms TimeCoverageRelationStatistics Valid=513, Invalid=1839, Unknown=0, NotChecked=0, Total=2352 [2021-06-06 00:29:02,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85794 states. [2021-06-06 00:29:03,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85794 to 48129. [2021-06-06 00:29:03,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48129 states, 48128 states have (on average 3.575236868351064) internal successors, (172069), 48128 states have internal predecessors, (172069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:03,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48129 states to 48129 states and 172069 transitions. [2021-06-06 00:29:03,653 INFO L78 Accepts]: Start accepts. Automaton has 48129 states and 172069 transitions. Word has length 36 [2021-06-06 00:29:03,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:03,653 INFO L482 AbstractCegarLoop]: Abstraction has 48129 states and 172069 transitions. [2021-06-06 00:29:03,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:03,654 INFO L276 IsEmpty]: Start isEmpty. Operand 48129 states and 172069 transitions. [2021-06-06 00:29:03,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:29:03,717 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:03,717 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:03,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2021-06-06 00:29:03,917 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:03,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:03,917 INFO L82 PathProgramCache]: Analyzing trace with hash -262360878, now seen corresponding path program 163 times [2021-06-06 00:29:03,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:03,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040396448] [2021-06-06 00:29:03,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:03,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:03,976 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:03,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:03,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040396448] [2021-06-06 00:29:03,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040396448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:03,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057510694] [2021-06-06 00:29:03,976 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 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:04,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:04,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-06 00:29:04,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:04,154 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:29:04,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057510694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:04,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:04,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2021-06-06 00:29:04,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554859454] [2021-06-06 00:29:04,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-06 00:29:04,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:04,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-06 00:29:04,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:29:04,155 INFO L87 Difference]: Start difference. First operand 48129 states and 172069 transitions. Second operand has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:07,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:07,644 INFO L93 Difference]: Finished difference Result 88715 states and 301120 transitions. [2021-06-06 00:29:07,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2021-06-06 00:29:07,645 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:29:07,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:07,844 INFO L225 Difference]: With dead ends: 88715 [2021-06-06 00:29:07,844 INFO L226 Difference]: Without dead ends: 88715 [2021-06-06 00:29:07,844 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7758 ImplicationChecksByTransitivity, 2314.8ms TimeCoverageRelationStatistics Valid=3593, Invalid=15867, Unknown=0, NotChecked=0, Total=19460 [2021-06-06 00:29:07,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88715 states. [2021-06-06 00:29:09,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88715 to 45652. [2021-06-06 00:29:09,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45652 states, 45651 states have (on average 3.5827911765350158) internal successors, (163558), 45651 states have internal predecessors, (163558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:09,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45652 states to 45652 states and 163558 transitions. [2021-06-06 00:29:09,387 INFO L78 Accepts]: Start accepts. Automaton has 45652 states and 163558 transitions. Word has length 36 [2021-06-06 00:29:09,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:09,388 INFO L482 AbstractCegarLoop]: Abstraction has 45652 states and 163558 transitions. [2021-06-06 00:29:09,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:09,388 INFO L276 IsEmpty]: Start isEmpty. Operand 45652 states and 163558 transitions. [2021-06-06 00:29:09,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:29:09,457 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:09,457 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:09,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:09,657 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:09,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:09,658 INFO L82 PathProgramCache]: Analyzing trace with hash -541274128, now seen corresponding path program 164 times [2021-06-06 00:29:09,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:09,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844027561] [2021-06-06 00:29:09,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:09,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:09,728 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:09,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:09,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844027561] [2021-06-06 00:29:09,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844027561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:09,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177597795] [2021-06-06 00:29:09,728 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 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:09,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:29:09,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:29:09,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-06 00:29:09,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:09,871 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:29:09,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177597795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:09,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:09,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-06 00:29:09,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079014247] [2021-06-06 00:29:09,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:29:09,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:09,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:29:09,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:29:09,872 INFO L87 Difference]: Start difference. First operand 45652 states and 163558 transitions. Second operand has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:11,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:11,092 INFO L93 Difference]: Finished difference Result 60067 states and 210919 transitions. [2021-06-06 00:29:11,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-06 00:29:11,093 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:29:11,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:11,233 INFO L225 Difference]: With dead ends: 60067 [2021-06-06 00:29:11,233 INFO L226 Difference]: Without dead ends: 60043 [2021-06-06 00:29:11,234 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 873 ImplicationChecksByTransitivity, 553.4ms TimeCoverageRelationStatistics Valid=593, Invalid=2269, Unknown=0, NotChecked=0, Total=2862 [2021-06-06 00:29:11,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60043 states. [2021-06-06 00:29:12,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60043 to 45808. [2021-06-06 00:29:12,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45808 states, 45807 states have (on average 3.58054445827057) internal successors, (164014), 45807 states have internal predecessors, (164014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:12,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45808 states to 45808 states and 164014 transitions. [2021-06-06 00:29:12,542 INFO L78 Accepts]: Start accepts. Automaton has 45808 states and 164014 transitions. Word has length 36 [2021-06-06 00:29:12,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:12,542 INFO L482 AbstractCegarLoop]: Abstraction has 45808 states and 164014 transitions. [2021-06-06 00:29:12,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:12,542 INFO L276 IsEmpty]: Start isEmpty. Operand 45808 states and 164014 transitions. [2021-06-06 00:29:12,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:29:12,603 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:12,603 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:12,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,195 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:12,804 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:12,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:12,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1183120336, now seen corresponding path program 165 times [2021-06-06 00:29:12,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:12,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437361296] [2021-06-06 00:29:12,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:12,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:12,864 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:12,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:12,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437361296] [2021-06-06 00:29:12,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437361296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:12,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881014623] [2021-06-06 00:29:12,865 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 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:12,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-06 00:29:12,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:29:12,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:29:12,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:12,994 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:12,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881014623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:12,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:12,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-06-06 00:29:12,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476186015] [2021-06-06 00:29:12,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:29:12,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:12,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:29:12,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:29:12,995 INFO L87 Difference]: Start difference. First operand 45808 states and 164014 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:14,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:14,131 INFO L93 Difference]: Finished difference Result 60487 states and 212293 transitions. [2021-06-06 00:29:14,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-06 00:29:14,132 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:29:14,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:14,272 INFO L225 Difference]: With dead ends: 60487 [2021-06-06 00:29:14,272 INFO L226 Difference]: Without dead ends: 60447 [2021-06-06 00:29:14,273 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 409.3ms TimeCoverageRelationStatistics Valid=483, Invalid=1773, Unknown=0, NotChecked=0, Total=2256 [2021-06-06 00:29:14,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60447 states. [2021-06-06 00:29:15,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60447 to 45848. [2021-06-06 00:29:15,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45848 states, 45847 states have (on average 3.579776212184003) internal successors, (164122), 45847 states have internal predecessors, (164122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:15,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45848 states to 45848 states and 164122 transitions. [2021-06-06 00:29:15,532 INFO L78 Accepts]: Start accepts. Automaton has 45848 states and 164122 transitions. Word has length 36 [2021-06-06 00:29:15,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:15,532 INFO L482 AbstractCegarLoop]: Abstraction has 45848 states and 164122 transitions. [2021-06-06 00:29:15,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:15,532 INFO L276 IsEmpty]: Start isEmpty. Operand 45848 states and 164122 transitions. [2021-06-06 00:29:15,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:29:15,596 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:15,596 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:15,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:15,796 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:15,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:15,797 INFO L82 PathProgramCache]: Analyzing trace with hash 477964400, now seen corresponding path program 166 times [2021-06-06 00:29:15,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:15,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999088531] [2021-06-06 00:29:15,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:15,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:15,861 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:15,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:15,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999088531] [2021-06-06 00:29:15,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999088531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:15,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970358209] [2021-06-06 00:29:15,862 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 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:15,885 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:29:15,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:29:15,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-06 00:29:15,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:15,986 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:29:15,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970358209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:15,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:15,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-06-06 00:29:15,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405573150] [2021-06-06 00:29:15,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:29:15,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:15,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:29:15,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:29:15,986 INFO L87 Difference]: Start difference. First operand 45848 states and 164122 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:16,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:16,574 INFO L93 Difference]: Finished difference Result 61038 states and 214089 transitions. [2021-06-06 00:29:16,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-06 00:29:16,574 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:29:16,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:16,713 INFO L225 Difference]: With dead ends: 61038 [2021-06-06 00:29:16,713 INFO L226 Difference]: Without dead ends: 60982 [2021-06-06 00:29:16,714 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 272.7ms TimeCoverageRelationStatistics Valid=324, Invalid=1158, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:29:16,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60982 states. [2021-06-06 00:29:17,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60982 to 46210. [2021-06-06 00:29:18,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46210 states, 46209 states have (on average 3.574996212858967) internal successors, (165197), 46209 states have internal predecessors, (165197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:18,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46210 states to 46210 states and 165197 transitions. [2021-06-06 00:29:18,512 INFO L78 Accepts]: Start accepts. Automaton has 46210 states and 165197 transitions. Word has length 36 [2021-06-06 00:29:18,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:18,512 INFO L482 AbstractCegarLoop]: Abstraction has 46210 states and 165197 transitions. [2021-06-06 00:29:18,512 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:18,512 INFO L276 IsEmpty]: Start isEmpty. Operand 46210 states and 165197 transitions. [2021-06-06 00:29:18,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:29:18,607 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:18,607 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:18,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable197 [2021-06-06 00:29:18,829 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:18,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:18,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1387504756, now seen corresponding path program 167 times [2021-06-06 00:29:18,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:18,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617173082] [2021-06-06 00:29:18,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:18,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:18,897 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:18,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:18,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617173082] [2021-06-06 00:29:18,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617173082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:18,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714178968] [2021-06-06 00:29:18,898 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:18,930 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-06 00:29:18,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:29:18,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:29:18,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:19,111 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:19,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714178968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:19,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:19,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-06 00:29:19,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887123809] [2021-06-06 00:29:19,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:29:19,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:19,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:29:19,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:29:19,113 INFO L87 Difference]: Start difference. First operand 46210 states and 165197 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:21,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:21,627 INFO L93 Difference]: Finished difference Result 98103 states and 338371 transitions. [2021-06-06 00:29:21,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-06-06 00:29:21,627 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:29:21,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:21,855 INFO L225 Difference]: With dead ends: 98103 [2021-06-06 00:29:21,855 INFO L226 Difference]: Without dead ends: 98007 [2021-06-06 00:29:21,855 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4211 ImplicationChecksByTransitivity, 1385.0ms TimeCoverageRelationStatistics Valid=2335, Invalid=8795, Unknown=0, NotChecked=0, Total=11130 [2021-06-06 00:29:21,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98007 states. [2021-06-06 00:29:23,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98007 to 48240. [2021-06-06 00:29:23,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48240 states, 48239 states have (on average 3.5919069632455067) internal successors, (173270), 48239 states have internal predecessors, (173270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:23,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48240 states to 48240 states and 173270 transitions. [2021-06-06 00:29:23,464 INFO L78 Accepts]: Start accepts. Automaton has 48240 states and 173270 transitions. Word has length 36 [2021-06-06 00:29:23,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:23,464 INFO L482 AbstractCegarLoop]: Abstraction has 48240 states and 173270 transitions. [2021-06-06 00:29:23,464 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:23,464 INFO L276 IsEmpty]: Start isEmpty. Operand 48240 states and 173270 transitions. [2021-06-06 00:29:23,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:29:23,529 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:23,529 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:23,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:23,730 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:23,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:23,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1051947072, now seen corresponding path program 31 times [2021-06-06 00:29:23,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:23,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632416100] [2021-06-06 00:29:23,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:23,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:23,802 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:23,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:23,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632416100] [2021-06-06 00:29:23,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632416100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:23,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321397183] [2021-06-06 00:29:23,803 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 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:23,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:23,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:29:23,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:23,980 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:23,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321397183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:23,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:23,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-06 00:29:23,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323960105] [2021-06-06 00:29:23,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-06 00:29:23,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:23,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-06 00:29:23,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-06-06 00:29:23,981 INFO L87 Difference]: Start difference. First operand 48240 states and 173270 transitions. Second operand has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:24,617 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2021-06-06 00:29:26,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:26,160 INFO L93 Difference]: Finished difference Result 93202 states and 319824 transitions. [2021-06-06 00:29:26,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-06 00:29:26,160 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:29:26,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:26,390 INFO L225 Difference]: With dead ends: 93202 [2021-06-06 00:29:26,390 INFO L226 Difference]: Without dead ends: 93202 [2021-06-06 00:29:26,391 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3041 ImplicationChecksByTransitivity, 1319.3ms TimeCoverageRelationStatistics Valid=1871, Invalid=6139, Unknown=0, NotChecked=0, Total=8010 [2021-06-06 00:29:26,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93202 states. [2021-06-06 00:29:28,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93202 to 47715. [2021-06-06 00:29:28,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47715 states, 47714 states have (on average 3.5815274342960137) internal successors, (170889), 47714 states have internal predecessors, (170889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:28,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47715 states to 47715 states and 170889 transitions. [2021-06-06 00:29:28,256 INFO L78 Accepts]: Start accepts. Automaton has 47715 states and 170889 transitions. Word has length 36 [2021-06-06 00:29:28,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:28,256 INFO L482 AbstractCegarLoop]: Abstraction has 47715 states and 170889 transitions. [2021-06-06 00:29:28,256 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:28,257 INFO L276 IsEmpty]: Start isEmpty. Operand 47715 states and 170889 transitions. [2021-06-06 00:29:28,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-06 00:29:28,327 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:28,327 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:28,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:28,527 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:28,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:28,527 INFO L82 PathProgramCache]: Analyzing trace with hash 822150136, now seen corresponding path program 32 times [2021-06-06 00:29:28,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:28,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760805342] [2021-06-06 00:29:28,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:28,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:28,577 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:28,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:28,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760805342] [2021-06-06 00:29:28,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760805342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:28,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143630622] [2021-06-06 00:29:28,578 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 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:28,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:29:28,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:29:28,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-06 00:29:28,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:28,747 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:29:28,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143630622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:28,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:28,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-06 00:29:28,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312501859] [2021-06-06 00:29:28,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-06 00:29:28,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:28,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-06 00:29:28,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-06 00:29:28,748 INFO L87 Difference]: Start difference. First operand 47715 states and 170889 transitions. Second operand has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:32,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:32,468 INFO L93 Difference]: Finished difference Result 90552 states and 306749 transitions. [2021-06-06 00:29:32,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2021-06-06 00:29:32,469 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-06 00:29:32,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:32,676 INFO L225 Difference]: With dead ends: 90552 [2021-06-06 00:29:32,676 INFO L226 Difference]: Without dead ends: 90552 [2021-06-06 00:29:32,678 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11781 ImplicationChecksByTransitivity, 2529.8ms TimeCoverageRelationStatistics Valid=4945, Invalid=22445, Unknown=0, NotChecked=0, Total=27390 [2021-06-06 00:29:32,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90552 states. [2021-06-06 00:29:34,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90552 to 47578. [2021-06-06 00:29:34,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47578 states, 47577 states have (on average 3.5791664039346744) internal successors, (170286), 47577 states have internal predecessors, (170286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:34,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47578 states to 47578 states and 170286 transitions. [2021-06-06 00:29:34,482 INFO L78 Accepts]: Start accepts. Automaton has 47578 states and 170286 transitions. Word has length 36 [2021-06-06 00:29:34,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:34,482 INFO L482 AbstractCegarLoop]: Abstraction has 47578 states and 170286 transitions. [2021-06-06 00:29:34,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:34,482 INFO L276 IsEmpty]: Start isEmpty. Operand 47578 states and 170286 transitions. [2021-06-06 00:29:34,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-06 00:29:34,550 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:34,550 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:34,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-06-06 00:29:34,750 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:34,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:34,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1213094942, now seen corresponding path program 168 times [2021-06-06 00:29:34,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:34,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424186174] [2021-06-06 00:29:34,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:34,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:34,822 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:34,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:34,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424186174] [2021-06-06 00:29:34,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424186174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:34,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459867500] [2021-06-06 00:29:34,822 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 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:34,847 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-06 00:29:34,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:29:34,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-06 00:29:34,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:35,028 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:35,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459867500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:35,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:35,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-06 00:29:35,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747154661] [2021-06-06 00:29:35,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-06 00:29:35,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:35,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-06 00:29:35,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-06-06 00:29:35,029 INFO L87 Difference]: Start difference. First operand 47578 states and 170286 transitions. Second operand has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:37,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:37,420 INFO L93 Difference]: Finished difference Result 84172 states and 291355 transitions. [2021-06-06 00:29:37,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-06-06 00:29:37,421 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-06 00:29:37,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:37,606 INFO L225 Difference]: With dead ends: 84172 [2021-06-06 00:29:37,606 INFO L226 Difference]: Without dead ends: 84172 [2021-06-06 00:29:37,607 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3966 ImplicationChecksByTransitivity, 1430.0ms TimeCoverageRelationStatistics Valid=2254, Invalid=8666, Unknown=0, NotChecked=0, Total=10920 [2021-06-06 00:29:37,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84172 states. [2021-06-06 00:29:39,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84172 to 46240. [2021-06-06 00:29:39,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46240 states, 46239 states have (on average 3.55470490278769) internal successors, (164366), 46239 states have internal predecessors, (164366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:39,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46240 states to 46240 states and 164366 transitions. [2021-06-06 00:29:39,227 INFO L78 Accepts]: Start accepts. Automaton has 46240 states and 164366 transitions. Word has length 38 [2021-06-06 00:29:39,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:39,227 INFO L482 AbstractCegarLoop]: Abstraction has 46240 states and 164366 transitions. [2021-06-06 00:29:39,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:39,227 INFO L276 IsEmpty]: Start isEmpty. Operand 46240 states and 164366 transitions. [2021-06-06 00:29:39,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-06 00:29:39,300 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:39,300 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:39,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-06-06 00:29:39,500 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:39,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:39,501 INFO L82 PathProgramCache]: Analyzing trace with hash -660509142, now seen corresponding path program 169 times [2021-06-06 00:29:39,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:39,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032937334] [2021-06-06 00:29:39,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:39,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:39,832 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:39,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:39,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032937334] [2021-06-06 00:29:39,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032937334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:39,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078828566] [2021-06-06 00:29:39,832 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 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:39,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:39,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-06 00:29:39,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:40,051 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:40,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078828566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:40,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:40,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-06 00:29:40,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425874861] [2021-06-06 00:29:40,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-06 00:29:40,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:40,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-06 00:29:40,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2021-06-06 00:29:40,052 INFO L87 Difference]: Start difference. First operand 46240 states and 164366 transitions. Second operand has 25 states, 25 states have (on average 2.68) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:42,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:42,899 INFO L93 Difference]: Finished difference Result 102346 states and 353710 transitions. [2021-06-06 00:29:42,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-06-06 00:29:42,900 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-06 00:29:42,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:43,140 INFO L225 Difference]: With dead ends: 102346 [2021-06-06 00:29:43,140 INFO L226 Difference]: Without dead ends: 102346 [2021-06-06 00:29:43,141 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4822 ImplicationChecksByTransitivity, 1680.0ms TimeCoverageRelationStatistics Valid=2499, Invalid=10611, Unknown=0, NotChecked=0, Total=13110 [2021-06-06 00:29:43,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102346 states. [2021-06-06 00:29:44,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102346 to 46231. [2021-06-06 00:29:44,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46231 states, 46230 states have (on average 3.55425048669695) internal successors, (164313), 46230 states have internal predecessors, (164313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:44,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46231 states to 46231 states and 164313 transitions. [2021-06-06 00:29:44,902 INFO L78 Accepts]: Start accepts. Automaton has 46231 states and 164313 transitions. Word has length 38 [2021-06-06 00:29:44,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:44,902 INFO L482 AbstractCegarLoop]: Abstraction has 46231 states and 164313 transitions. [2021-06-06 00:29:44,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:44,902 INFO L276 IsEmpty]: Start isEmpty. Operand 46231 states and 164313 transitions. [2021-06-06 00:29:44,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-06 00:29:44,973 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:44,973 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:45,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-06-06 00:29:45,173 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:45,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:45,174 INFO L82 PathProgramCache]: Analyzing trace with hash -645048346, now seen corresponding path program 170 times [2021-06-06 00:29:45,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:45,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543471764] [2021-06-06 00:29:45,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:45,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:45,248 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:45,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:45,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543471764] [2021-06-06 00:29:45,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543471764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:45,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674308628] [2021-06-06 00:29:45,249 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 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:45,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:29:45,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:29:45,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-06 00:29:45,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:45,466 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:45,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674308628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:45,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:45,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-06 00:29:45,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651095578] [2021-06-06 00:29:45,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-06 00:29:45,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:45,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-06 00:29:45,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2021-06-06 00:29:45,467 INFO L87 Difference]: Start difference. First operand 46231 states and 164313 transitions. Second operand has 25 states, 25 states have (on average 2.68) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:45,762 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-06-06 00:29:48,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:48,625 INFO L93 Difference]: Finished difference Result 103205 states and 355608 transitions. [2021-06-06 00:29:48,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-06-06 00:29:48,626 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-06 00:29:48,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:48,885 INFO L225 Difference]: With dead ends: 103205 [2021-06-06 00:29:48,885 INFO L226 Difference]: Without dead ends: 103205 [2021-06-06 00:29:48,886 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4862 ImplicationChecksByTransitivity, 1718.6ms TimeCoverageRelationStatistics Valid=2510, Invalid=10830, Unknown=0, NotChecked=0, Total=13340 [2021-06-06 00:29:48,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103205 states. [2021-06-06 00:29:50,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103205 to 46140. [2021-06-06 00:29:50,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46140 states, 46139 states have (on average 3.551940874314571) internal successors, (163883), 46139 states have internal predecessors, (163883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:50,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46140 states to 46140 states and 163883 transitions. [2021-06-06 00:29:50,589 INFO L78 Accepts]: Start accepts. Automaton has 46140 states and 163883 transitions. Word has length 38 [2021-06-06 00:29:50,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:50,589 INFO L482 AbstractCegarLoop]: Abstraction has 46140 states and 163883 transitions. [2021-06-06 00:29:50,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:50,589 INFO L276 IsEmpty]: Start isEmpty. Operand 46140 states and 163883 transitions. [2021-06-06 00:29:50,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-06 00:29:50,655 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:50,655 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:50,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:50,856 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:50,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:50,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1650063650, now seen corresponding path program 171 times [2021-06-06 00:29:50,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:50,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133039663] [2021-06-06 00:29:50,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:50,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:50,926 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:50,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:50,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133039663] [2021-06-06 00:29:50,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133039663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:50,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749499618] [2021-06-06 00:29:50,927 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 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:50,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:29:50,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:29:50,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-06 00:29:50,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:51,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-06-06 00:29:51,032 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:29:51,038 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:29:51,039 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:29:51,039 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:20 [2021-06-06 00:29:51,076 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-06-06 00:29:51,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-06 00:29:51,077 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:29:51,090 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:29:51,092 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-06 00:29:51,092 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:32 [2021-06-06 00:29:51,179 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-06-06 00:29:51,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2021-06-06 00:29:51,180 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:29:51,190 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:29:51,193 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-06 00:29:51,193 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:41 [2021-06-06 00:29:51,266 INFO L354 Elim1Store]: treesize reduction 72, result has 18.2 percent of original size [2021-06-06 00:29:51,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 38 [2021-06-06 00:29:51,267 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:29:51,281 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:29:51,285 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-06 00:29:51,286 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:54, output treesize:53 [2021-06-06 00:29:51,385 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-06-06 00:29:51,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749499618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:51,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:51,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-06-06 00:29:51,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354359357] [2021-06-06 00:29:51,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-06 00:29:51,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:51,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-06 00:29:51,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-06 00:29:51,386 INFO L87 Difference]: Start difference. First operand 46140 states and 163883 transitions. Second operand has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:55,341 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2021-06-06 00:30:01,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:30:01,169 INFO L93 Difference]: Finished difference Result 75308 states and 254815 transitions. [2021-06-06 00:30:01,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 249 states. [2021-06-06 00:30:01,169 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-06 00:30:01,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:30:01,329 INFO L225 Difference]: With dead ends: 75308 [2021-06-06 00:30:01,329 INFO L226 Difference]: Without dead ends: 75043 [2021-06-06 00:30:01,332 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 261 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30066 ImplicationChecksByTransitivity, 7565.6ms TimeCoverageRelationStatistics Valid=9127, Invalid=59779, Unknown=0, NotChecked=0, Total=68906 [2021-06-06 00:30:01,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75043 states. [2021-06-06 00:30:02,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75043 to 48238. [2021-06-06 00:30:02,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48238 states, 48237 states have (on average 3.5619545162427184) internal successors, (171818), 48237 states have internal predecessors, (171818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:02,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48238 states to 48238 states and 171818 transitions. [2021-06-06 00:30:02,641 INFO L78 Accepts]: Start accepts. Automaton has 48238 states and 171818 transitions. Word has length 38 [2021-06-06 00:30:02,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:30:02,641 INFO L482 AbstractCegarLoop]: Abstraction has 48238 states and 171818 transitions. [2021-06-06 00:30:02,641 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:02,641 INFO L276 IsEmpty]: Start isEmpty. Operand 48238 states and 171818 transitions. [2021-06-06 00:30:02,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-06 00:30:02,712 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:30:02,712 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:30:02,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2021-06-06 00:30:02,912 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:30:02,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:30:02,912 INFO L82 PathProgramCache]: Analyzing trace with hash 509936226, now seen corresponding path program 172 times [2021-06-06 00:30:02,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:30:02,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835888749] [2021-06-06 00:30:02,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:30:02,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:30:03,181 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2021-06-06 00:30:03,246 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:03,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:30:03,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835888749] [2021-06-06 00:30:03,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835888749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:03,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387445850] [2021-06-06 00:30:03,247 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 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:30:03,271 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:30:03,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:30:03,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-06 00:30:03,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:30:03,439 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:03,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387445850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:03,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:30:03,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-06 00:30:03,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468247904] [2021-06-06 00:30:03,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-06 00:30:03,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:30:03,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-06 00:30:03,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:30:03,440 INFO L87 Difference]: Start difference. First operand 48238 states and 171818 transitions. Second operand has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:05,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:30:05,920 INFO L93 Difference]: Finished difference Result 81604 states and 282162 transitions. [2021-06-06 00:30:05,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-06-06 00:30:05,921 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-06 00:30:05,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:30:06,092 INFO L225 Difference]: With dead ends: 81604 [2021-06-06 00:30:06,092 INFO L226 Difference]: Without dead ends: 81604 [2021-06-06 00:30:06,092 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3744 ImplicationChecksByTransitivity, 1454.8ms TimeCoverageRelationStatistics Valid=2006, Invalid=8500, Unknown=0, NotChecked=0, Total=10506 [2021-06-06 00:30:06,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81604 states. [2021-06-06 00:30:07,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81604 to 48089. [2021-06-06 00:30:07,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48089 states, 48088 states have (on average 3.559682249209782) internal successors, (171178), 48088 states have internal predecessors, (171178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:07,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48089 states to 48089 states and 171178 transitions. [2021-06-06 00:30:07,571 INFO L78 Accepts]: Start accepts. Automaton has 48089 states and 171178 transitions. Word has length 38 [2021-06-06 00:30:07,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:30:07,571 INFO L482 AbstractCegarLoop]: Abstraction has 48089 states and 171178 transitions. [2021-06-06 00:30:07,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:07,572 INFO L276 IsEmpty]: Start isEmpty. Operand 48089 states and 171178 transitions. [2021-06-06 00:30:07,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-06 00:30:07,642 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:30:07,642 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:30:07,842 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:30:07,842 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:30:07,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:30:07,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1496118174, now seen corresponding path program 173 times [2021-06-06 00:30:07,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:30:07,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38748452] [2021-06-06 00:30:07,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:30:07,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:30:07,915 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:07,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:30:07,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38748452] [2021-06-06 00:30:07,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38748452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:07,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482706606] [2021-06-06 00:30:07,916 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 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:30:08,069 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-06 00:30:08,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:30:08,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-06 00:30:08,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:30:08,226 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:08,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482706606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:08,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:30:08,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-06 00:30:08,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118140112] [2021-06-06 00:30:08,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-06 00:30:08,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:30:08,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-06 00:30:08,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-06-06 00:30:08,226 INFO L87 Difference]: Start difference. First operand 48089 states and 171178 transitions. Second operand has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:10,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:30:10,296 INFO L93 Difference]: Finished difference Result 79734 states and 276240 transitions. [2021-06-06 00:30:10,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-06-06 00:30:10,297 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-06 00:30:10,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:30:10,472 INFO L225 Difference]: With dead ends: 79734 [2021-06-06 00:30:10,473 INFO L226 Difference]: Without dead ends: 79734 [2021-06-06 00:30:10,473 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2751 ImplicationChecksByTransitivity, 967.9ms TimeCoverageRelationStatistics Valid=1525, Invalid=6485, Unknown=0, NotChecked=0, Total=8010 [2021-06-06 00:30:10,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79734 states. [2021-06-06 00:30:11,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79734 to 48379. [2021-06-06 00:30:11,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48379 states, 48378 states have (on average 3.5571747488527845) internal successors, (172089), 48378 states have internal predecessors, (172089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:12,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48379 states to 48379 states and 172089 transitions. [2021-06-06 00:30:12,048 INFO L78 Accepts]: Start accepts. Automaton has 48379 states and 172089 transitions. Word has length 38 [2021-06-06 00:30:12,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:30:12,048 INFO L482 AbstractCegarLoop]: Abstraction has 48379 states and 172089 transitions. [2021-06-06 00:30:12,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:12,049 INFO L276 IsEmpty]: Start isEmpty. Operand 48379 states and 172089 transitions. [2021-06-06 00:30:12,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-06 00:30:12,122 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:30:12,122 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:30:12,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-06-06 00:30:12,323 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:30:12,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:30:12,323 INFO L82 PathProgramCache]: Analyzing trace with hash 383786966, now seen corresponding path program 33 times [2021-06-06 00:30:12,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:30:12,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723002702] [2021-06-06 00:30:12,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:30:12,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:30:12,398 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:12,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:30:12,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723002702] [2021-06-06 00:30:12,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723002702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:12,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415444674] [2021-06-06 00:30:12,398 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 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:30:12,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-06 00:30:12,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:30:12,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-06 00:30:12,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:30:12,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-06 00:30:12,571 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:30:12,577 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:30:12,578 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:30:12,578 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:24 [2021-06-06 00:30:12,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:30:12,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-06-06 00:30:12,607 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:30:12,617 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:30:12,618 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-06 00:30:12,618 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:36 [2021-06-06 00:30:12,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:30:12,673 INFO L354 Elim1Store]: treesize reduction 38, result has 25.5 percent of original size [2021-06-06 00:30:12,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 32 [2021-06-06 00:30:12,675 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:30:12,945 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-06-06 00:30:12,946 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:30:12,950 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-06 00:30:12,950 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:49, output treesize:48 [2021-06-06 00:30:13,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:30:13,046 INFO L354 Elim1Store]: treesize reduction 72, result has 20.0 percent of original size [2021-06-06 00:30:13,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 42 [2021-06-06 00:30:13,048 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:30:13,069 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:30:13,074 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-06 00:30:13,074 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:61, output treesize:60 [2021-06-06 00:30:13,378 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-06-06 00:30:13,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415444674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:13,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:30:13,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 26 [2021-06-06 00:30:13,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682043493] [2021-06-06 00:30:13,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-06 00:30:13,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:30:13,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-06 00:30:13,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-06-06 00:30:13,379 INFO L87 Difference]: Start difference. First operand 48379 states and 172089 transitions. Second operand has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:19,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:30:19,659 INFO L93 Difference]: Finished difference Result 58151 states and 199699 transitions. [2021-06-06 00:30:19,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2021-06-06 00:30:19,659 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-06 00:30:19,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:30:19,789 INFO L225 Difference]: With dead ends: 58151 [2021-06-06 00:30:19,789 INFO L226 Difference]: Without dead ends: 57965 [2021-06-06 00:30:19,791 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9563 ImplicationChecksByTransitivity, 4164.5ms TimeCoverageRelationStatistics Valid=3322, Invalid=23084, Unknown=0, NotChecked=0, Total=26406 [2021-06-06 00:30:19,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57965 states. [2021-06-06 00:30:20,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57965 to 49217. [2021-06-06 00:30:20,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49217 states, 49216 states have (on average 3.544457087126138) internal successors, (174444), 49216 states have internal predecessors, (174444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:20,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49217 states to 49217 states and 174444 transitions. [2021-06-06 00:30:20,991 INFO L78 Accepts]: Start accepts. Automaton has 49217 states and 174444 transitions. Word has length 38 [2021-06-06 00:30:20,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:30:20,991 INFO L482 AbstractCegarLoop]: Abstraction has 49217 states and 174444 transitions. [2021-06-06 00:30:20,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:20,991 INFO L276 IsEmpty]: Start isEmpty. Operand 49217 states and 174444 transitions. [2021-06-06 00:30:21,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-06 00:30:21,249 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:30:21,249 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:30:21,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable207 [2021-06-06 00:30:21,465 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:30:21,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:30:21,465 INFO L82 PathProgramCache]: Analyzing trace with hash -977093798, now seen corresponding path program 34 times [2021-06-06 00:30:21,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:30:21,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335652036] [2021-06-06 00:30:21,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:30:21,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:30:21,537 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:21,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:30:21,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335652036] [2021-06-06 00:30:21,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335652036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:21,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102715028] [2021-06-06 00:30:21,537 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 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:30:21,560 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:30:21,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:30:21,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-06 00:30:21,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:30:21,715 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:21,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102715028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:21,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:30:21,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-06 00:30:21,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604659954] [2021-06-06 00:30:21,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-06 00:30:21,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:30:21,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-06 00:30:21,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-06-06 00:30:21,716 INFO L87 Difference]: Start difference. First operand 49217 states and 174444 transitions. Second operand has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:24,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:30:24,092 INFO L93 Difference]: Finished difference Result 86687 states and 295949 transitions. [2021-06-06 00:30:24,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-06-06 00:30:24,092 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-06 00:30:24,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:30:24,290 INFO L225 Difference]: With dead ends: 86687 [2021-06-06 00:30:24,291 INFO L226 Difference]: Without dead ends: 86687 [2021-06-06 00:30:24,291 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4336 ImplicationChecksByTransitivity, 1239.5ms TimeCoverageRelationStatistics Valid=2398, Invalid=9158, Unknown=0, NotChecked=0, Total=11556 [2021-06-06 00:30:24,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86687 states. [2021-06-06 00:30:25,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86687 to 49319. [2021-06-06 00:30:25,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49319 states, 49318 states have (on average 3.541627803236141) internal successors, (174666), 49318 states have internal predecessors, (174666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:25,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49319 states to 49319 states and 174666 transitions. [2021-06-06 00:30:25,837 INFO L78 Accepts]: Start accepts. Automaton has 49319 states and 174666 transitions. Word has length 38 [2021-06-06 00:30:25,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:30:25,837 INFO L482 AbstractCegarLoop]: Abstraction has 49319 states and 174666 transitions. [2021-06-06 00:30:25,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:25,837 INFO L276 IsEmpty]: Start isEmpty. Operand 49319 states and 174666 transitions. [2021-06-06 00:30:25,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-06 00:30:25,911 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:30:25,912 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:30:26,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:30:26,112 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:30:26,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:30:26,112 INFO L82 PathProgramCache]: Analyzing trace with hash -151929582, now seen corresponding path program 174 times [2021-06-06 00:30:26,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:30:26,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165886743] [2021-06-06 00:30:26,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:30:26,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:30:26,161 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:26,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:30:26,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165886743] [2021-06-06 00:30:26,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165886743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:26,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800429861] [2021-06-06 00:30:26,161 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 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:30:26,188 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-06 00:30:26,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:30:26,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-06 00:30:26,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:30:26,305 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 21 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:26,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800429861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:26,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:30:26,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-06 00:30:26,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308085745] [2021-06-06 00:30:26,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:30:26,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:30:26,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:30:26,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:30:26,306 INFO L87 Difference]: Start difference. First operand 49319 states and 174666 transitions. Second operand has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:28,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:30:28,205 INFO L93 Difference]: Finished difference Result 80441 states and 277407 transitions. [2021-06-06 00:30:28,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-06 00:30:28,206 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-06 00:30:28,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:30:28,386 INFO L225 Difference]: With dead ends: 80441 [2021-06-06 00:30:28,386 INFO L226 Difference]: Without dead ends: 80433 [2021-06-06 00:30:28,387 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2578 ImplicationChecksByTransitivity, 752.9ms TimeCoverageRelationStatistics Valid=1363, Invalid=5609, Unknown=0, NotChecked=0, Total=6972 [2021-06-06 00:30:28,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80433 states. [2021-06-06 00:30:29,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80433 to 49027. [2021-06-06 00:30:29,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49027 states, 49026 states have (on average 3.5350222331008037) internal successors, (173308), 49026 states have internal predecessors, (173308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:30,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49027 states to 49027 states and 173308 transitions. [2021-06-06 00:30:30,043 INFO L78 Accepts]: Start accepts. Automaton has 49027 states and 173308 transitions. Word has length 38 [2021-06-06 00:30:30,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:30:30,043 INFO L482 AbstractCegarLoop]: Abstraction has 49027 states and 173308 transitions. [2021-06-06 00:30:30,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:30,043 INFO L276 IsEmpty]: Start isEmpty. Operand 49027 states and 173308 transitions. [2021-06-06 00:30:30,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-06 00:30:30,120 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:30:30,120 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:30:30,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable209 [2021-06-06 00:30:30,321 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:30:30,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:30:30,321 INFO L82 PathProgramCache]: Analyzing trace with hash 826627862, now seen corresponding path program 175 times [2021-06-06 00:30:30,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:30:30,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601700225] [2021-06-06 00:30:30,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:30:30,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:30:30,369 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:30,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:30:30,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601700225] [2021-06-06 00:30:30,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601700225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:30,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064747131] [2021-06-06 00:30:30,370 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 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:30:30,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:30:30,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-06 00:30:30,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:30:30,515 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 21 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:30,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064747131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:30,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:30:30,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-06 00:30:30,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736851458] [2021-06-06 00:30:30,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:30:30,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:30:30,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:30:30,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:30:30,515 INFO L87 Difference]: Start difference. First operand 49027 states and 173308 transitions. Second operand has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:32,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:30:32,336 INFO L93 Difference]: Finished difference Result 81538 states and 279709 transitions. [2021-06-06 00:30:32,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-06-06 00:30:32,337 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-06 00:30:32,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:30:32,521 INFO L225 Difference]: With dead ends: 81538 [2021-06-06 00:30:32,522 INFO L226 Difference]: Without dead ends: 81538 [2021-06-06 00:30:32,522 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2860 ImplicationChecksByTransitivity, 1026.1ms TimeCoverageRelationStatistics Valid=1397, Invalid=6085, Unknown=0, NotChecked=0, Total=7482 [2021-06-06 00:30:32,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81538 states. [2021-06-06 00:30:33,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81538 to 48751. [2021-06-06 00:30:33,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48751 states, 48750 states have (on average 3.5292717948717947) internal successors, (172052), 48750 states have internal predecessors, (172052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:34,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48751 states to 48751 states and 172052 transitions. [2021-06-06 00:30:34,335 INFO L78 Accepts]: Start accepts. Automaton has 48751 states and 172052 transitions. Word has length 38 [2021-06-06 00:30:34,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:30:34,336 INFO L482 AbstractCegarLoop]: Abstraction has 48751 states and 172052 transitions. [2021-06-06 00:30:34,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:34,336 INFO L276 IsEmpty]: Start isEmpty. Operand 48751 states and 172052 transitions. [2021-06-06 00:30:34,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-06 00:30:34,422 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:30:34,422 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:30:34,622 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-06-06 00:30:34,623 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:30:34,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:30:34,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1341193110, now seen corresponding path program 176 times [2021-06-06 00:30:34,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:30:34,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060592479] [2021-06-06 00:30:34,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:30:34,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:30:34,680 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 6 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:34,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:30:34,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060592479] [2021-06-06 00:30:34,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060592479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:34,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29680370] [2021-06-06 00:30:34,680 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 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:30:34,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:30:34,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:30:34,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-06 00:30:34,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:30:34,845 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:34,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29680370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:34,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:30:34,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-06 00:30:34,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740095239] [2021-06-06 00:30:34,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:30:34,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:30:34,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:30:34,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:30:34,846 INFO L87 Difference]: Start difference. First operand 48751 states and 172052 transitions. Second operand has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:36,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:30:36,740 INFO L93 Difference]: Finished difference Result 91319 states and 312144 transitions. [2021-06-06 00:30:36,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-06-06 00:30:36,741 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-06 00:30:36,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:30:37,234 INFO L225 Difference]: With dead ends: 91319 [2021-06-06 00:30:37,235 INFO L226 Difference]: Without dead ends: 91319 [2021-06-06 00:30:37,235 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3311 ImplicationChecksByTransitivity, 937.2ms TimeCoverageRelationStatistics Valid=1776, Invalid=6966, Unknown=0, NotChecked=0, Total=8742 [2021-06-06 00:30:37,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91319 states. [2021-06-06 00:30:38,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91319 to 49212. [2021-06-06 00:30:38,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49212 states, 49211 states have (on average 3.5392087134990144) internal successors, (174168), 49211 states have internal predecessors, (174168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:38,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49212 states to 49212 states and 174168 transitions. [2021-06-06 00:30:38,908 INFO L78 Accepts]: Start accepts. Automaton has 49212 states and 174168 transitions. Word has length 38 [2021-06-06 00:30:38,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:30:38,908 INFO L482 AbstractCegarLoop]: Abstraction has 49212 states and 174168 transitions. [2021-06-06 00:30:38,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:38,908 INFO L276 IsEmpty]: Start isEmpty. Operand 49212 states and 174168 transitions. [2021-06-06 00:30:38,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-06 00:30:38,984 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:30:38,984 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:30:39,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:30:39,184 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:30:39,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:30:39,185 INFO L82 PathProgramCache]: Analyzing trace with hash 285815716, now seen corresponding path program 177 times [2021-06-06 00:30:39,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:30:39,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144771735] [2021-06-06 00:30:39,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:30:39,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:30:39,232 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:39,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:30:39,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144771735] [2021-06-06 00:30:39,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144771735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:39,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343934887] [2021-06-06 00:30:39,232 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 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:30:39,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-06 00:30:39,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:30:39,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-06 00:30:39,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:30:39,404 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 21 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:39,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343934887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:39,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:30:39,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-06 00:30:39,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480862032] [2021-06-06 00:30:39,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:30:39,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:30:39,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:30:39,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:30:39,405 INFO L87 Difference]: Start difference. First operand 49212 states and 174168 transitions. Second operand has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:41,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:30:41,516 INFO L93 Difference]: Finished difference Result 89822 states and 308266 transitions. [2021-06-06 00:30:41,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-06-06 00:30:41,516 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-06 00:30:41,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:30:41,715 INFO L225 Difference]: With dead ends: 89822 [2021-06-06 00:30:41,715 INFO L226 Difference]: Without dead ends: 89810 [2021-06-06 00:30:41,716 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3114 ImplicationChecksByTransitivity, 943.9ms TimeCoverageRelationStatistics Valid=1756, Invalid=6616, Unknown=0, NotChecked=0, Total=8372 [2021-06-06 00:30:41,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89810 states. [2021-06-06 00:30:43,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89810 to 49210. [2021-06-06 00:30:43,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49210 states, 49209 states have (on average 3.539250950029466) internal successors, (174163), 49209 states have internal predecessors, (174163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:43,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49210 states to 49210 states and 174163 transitions. [2021-06-06 00:30:43,741 INFO L78 Accepts]: Start accepts. Automaton has 49210 states and 174163 transitions. Word has length 38 [2021-06-06 00:30:43,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:30:43,741 INFO L482 AbstractCegarLoop]: Abstraction has 49210 states and 174163 transitions. [2021-06-06 00:30:43,741 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:43,741 INFO L276 IsEmpty]: Start isEmpty. Operand 49210 states and 174163 transitions. [2021-06-06 00:30:43,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-06 00:30:43,812 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:30:43,812 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:30:44,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-06-06 00:30:44,025 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:30:44,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:30:44,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1137058970, now seen corresponding path program 178 times [2021-06-06 00:30:44,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:30:44,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657619765] [2021-06-06 00:30:44,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:30:44,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:30:44,072 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 6 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:44,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:30:44,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657619765] [2021-06-06 00:30:44,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657619765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:44,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030150880] [2021-06-06 00:30:44,072 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 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:30:44,096 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:30:44,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:30:44,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-06 00:30:44,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:30:44,237 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:44,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030150880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:44,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:30:44,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-06 00:30:44,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747850619] [2021-06-06 00:30:44,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:30:44,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:30:44,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:30:44,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:30:44,237 INFO L87 Difference]: Start difference. First operand 49210 states and 174163 transitions. Second operand has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:46,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:30:46,618 INFO L93 Difference]: Finished difference Result 109614 states and 376471 transitions. [2021-06-06 00:30:46,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-06-06 00:30:46,618 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-06 00:30:46,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:30:46,901 INFO L225 Difference]: With dead ends: 109614 [2021-06-06 00:30:46,902 INFO L226 Difference]: Without dead ends: 109614 [2021-06-06 00:30:46,902 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4548 ImplicationChecksByTransitivity, 1072.4ms TimeCoverageRelationStatistics Valid=2218, Invalid=8912, Unknown=0, NotChecked=0, Total=11130 [2021-06-06 00:30:47,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109614 states. [2021-06-06 00:30:48,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109614 to 49314. [2021-06-06 00:30:48,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49314 states, 49313 states have (on average 3.5432847322207124) internal successors, (174730), 49313 states have internal predecessors, (174730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:48,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49314 states to 49314 states and 174730 transitions. [2021-06-06 00:30:48,810 INFO L78 Accepts]: Start accepts. Automaton has 49314 states and 174730 transitions. Word has length 38 [2021-06-06 00:30:48,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:30:48,810 INFO L482 AbstractCegarLoop]: Abstraction has 49314 states and 174730 transitions. [2021-06-06 00:30:48,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:48,810 INFO L276 IsEmpty]: Start isEmpty. Operand 49314 states and 174730 transitions. [2021-06-06 00:30:48,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-06 00:30:48,883 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:30:48,883 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:30:49,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable213,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:30:49,084 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:30:49,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:30:49,084 INFO L82 PathProgramCache]: Analyzing trace with hash 129485782, now seen corresponding path program 179 times [2021-06-06 00:30:49,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:30:49,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885652433] [2021-06-06 00:30:49,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:30:49,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:30:49,131 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 6 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:49,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:30:49,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885652433] [2021-06-06 00:30:49,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885652433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:49,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433273584] [2021-06-06 00:30:49,131 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 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:30:49,159 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-06 00:30:49,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:30:49,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-06 00:30:49,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:30:49,613 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:49,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433273584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:49,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:30:49,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-06 00:30:49,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472448198] [2021-06-06 00:30:49,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:30:49,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:30:49,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:30:49,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:30:49,614 INFO L87 Difference]: Start difference. First operand 49314 states and 174730 transitions. Second operand has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:51,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:30:51,721 INFO L93 Difference]: Finished difference Result 110094 states and 377678 transitions. [2021-06-06 00:30:51,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-06-06 00:30:51,722 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-06 00:30:51,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:30:52,288 INFO L225 Difference]: With dead ends: 110094 [2021-06-06 00:30:52,289 INFO L226 Difference]: Without dead ends: 110094 [2021-06-06 00:30:52,289 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4544 ImplicationChecksByTransitivity, 1345.9ms TimeCoverageRelationStatistics Valid=2218, Invalid=8912, Unknown=0, NotChecked=0, Total=11130 [2021-06-06 00:30:52,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110094 states. [2021-06-06 00:30:53,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110094 to 49260. [2021-06-06 00:30:53,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49260 states, 49259 states have (on average 3.541078787632717) internal successors, (174430), 49259 states have internal predecessors, (174430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:54,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49260 states to 49260 states and 174430 transitions. [2021-06-06 00:30:54,098 INFO L78 Accepts]: Start accepts. Automaton has 49260 states and 174430 transitions. Word has length 38 [2021-06-06 00:30:54,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:30:54,098 INFO L482 AbstractCegarLoop]: Abstraction has 49260 states and 174430 transitions. [2021-06-06 00:30:54,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:54,098 INFO L276 IsEmpty]: Start isEmpty. Operand 49260 states and 174430 transitions. [2021-06-06 00:30:54,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-06 00:30:54,168 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:30:54,168 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:30:54,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214 [2021-06-06 00:30:54,368 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:30:54,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:30:54,369 INFO L82 PathProgramCache]: Analyzing trace with hash -990511256, now seen corresponding path program 180 times [2021-06-06 00:30:54,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:30:54,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847618046] [2021-06-06 00:30:54,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:30:54,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:30:54,416 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:54,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:30:54,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847618046] [2021-06-06 00:30:54,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847618046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:54,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368051133] [2021-06-06 00:30:54,417 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 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:30:54,442 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-06 00:30:54,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:30:54,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-06 00:30:54,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:30:54,573 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 21 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:54,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368051133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:54,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:30:54,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-06 00:30:54,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093004076] [2021-06-06 00:30:54,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:30:54,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:30:54,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:30:54,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:30:54,574 INFO L87 Difference]: Start difference. First operand 49260 states and 174430 transitions. Second operand has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:56,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:30:56,670 INFO L93 Difference]: Finished difference Result 90915 states and 311288 transitions. [2021-06-06 00:30:56,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-06-06 00:30:56,671 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-06 00:30:56,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:30:56,876 INFO L225 Difference]: With dead ends: 90915 [2021-06-06 00:30:56,876 INFO L226 Difference]: Without dead ends: 90903 [2021-06-06 00:30:56,877 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3140 ImplicationChecksByTransitivity, 868.3ms TimeCoverageRelationStatistics Valid=1702, Invalid=6670, Unknown=0, NotChecked=0, Total=8372 [2021-06-06 00:30:56,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90903 states. [2021-06-06 00:30:58,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90903 to 49268. [2021-06-06 00:30:58,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49268 states, 49267 states have (on average 3.5411127123632453) internal successors, (174460), 49267 states have internal predecessors, (174460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:58,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49268 states to 49268 states and 174460 transitions. [2021-06-06 00:30:58,872 INFO L78 Accepts]: Start accepts. Automaton has 49268 states and 174460 transitions. Word has length 38 [2021-06-06 00:30:58,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:30:58,873 INFO L482 AbstractCegarLoop]: Abstraction has 49268 states and 174460 transitions. [2021-06-06 00:30:58,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:58,873 INFO L276 IsEmpty]: Start isEmpty. Operand 49268 states and 174460 transitions. [2021-06-06 00:30:58,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-06 00:30:58,940 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:30:58,941 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:30:59,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:30:59,141 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:30:59,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:30:59,141 INFO L82 PathProgramCache]: Analyzing trace with hash -720001564, now seen corresponding path program 181 times [2021-06-06 00:30:59,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:30:59,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444196186] [2021-06-06 00:30:59,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:30:59,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:30:59,188 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:59,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:30:59,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444196186] [2021-06-06 00:30:59,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444196186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:59,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128146641] [2021-06-06 00:30:59,188 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 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:30:59,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:30:59,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-06 00:30:59,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:30:59,340 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 21 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:59,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128146641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:59,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:30:59,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-06 00:30:59,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193962669] [2021-06-06 00:30:59,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:30:59,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:30:59,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:30:59,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:30:59,341 INFO L87 Difference]: Start difference. First operand 49268 states and 174460 transitions. Second operand has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:01,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:31:01,430 INFO L93 Difference]: Finished difference Result 92540 states and 315646 transitions. [2021-06-06 00:31:01,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-06-06 00:31:01,430 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-06 00:31:01,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:31:01,640 INFO L225 Difference]: With dead ends: 92540 [2021-06-06 00:31:01,640 INFO L226 Difference]: Without dead ends: 92540 [2021-06-06 00:31:01,640 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3584 ImplicationChecksByTransitivity, 849.7ms TimeCoverageRelationStatistics Valid=1747, Invalid=7183, Unknown=0, NotChecked=0, Total=8930 [2021-06-06 00:31:01,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92540 states. [2021-06-06 00:31:03,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92540 to 49268. [2021-06-06 00:31:03,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49268 states, 49267 states have (on average 3.541153307487771) internal successors, (174462), 49267 states have internal predecessors, (174462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:03,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49268 states to 49268 states and 174462 transitions. [2021-06-06 00:31:03,289 INFO L78 Accepts]: Start accepts. Automaton has 49268 states and 174462 transitions. Word has length 38 [2021-06-06 00:31:03,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:31:03,289 INFO L482 AbstractCegarLoop]: Abstraction has 49268 states and 174462 transitions. [2021-06-06 00:31:03,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:03,289 INFO L276 IsEmpty]: Start isEmpty. Operand 49268 states and 174462 transitions. [2021-06-06 00:31:03,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-06 00:31:03,357 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:31:03,357 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:31:03,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2021-06-06 00:31:03,558 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:31:03,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:31:03,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1686399906, now seen corresponding path program 182 times [2021-06-06 00:31:03,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:31:03,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720306443] [2021-06-06 00:31:03,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:31:03,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:31:03,606 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 6 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:31:03,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:31:03,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720306443] [2021-06-06 00:31:03,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720306443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:03,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051561346] [2021-06-06 00:31:03,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:31:03,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:31:03,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:31:03,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-06 00:31:03,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:31:03,793 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:31:03,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051561346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:03,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:31:03,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-06-06 00:31:03,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944450978] [2021-06-06 00:31:03,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:31:03,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:31:03,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:31:03,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:31:03,794 INFO L87 Difference]: Start difference. First operand 49268 states and 174462 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:06,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:31:06,522 INFO L93 Difference]: Finished difference Result 88067 states and 300466 transitions. [2021-06-06 00:31:06,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2021-06-06 00:31:06,523 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-06 00:31:06,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:31:06,724 INFO L225 Difference]: With dead ends: 88067 [2021-06-06 00:31:06,724 INFO L226 Difference]: Without dead ends: 88067 [2021-06-06 00:31:06,725 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7081 ImplicationChecksByTransitivity, 1707.3ms TimeCoverageRelationStatistics Valid=2921, Invalid=14109, Unknown=0, NotChecked=0, Total=17030 [2021-06-06 00:31:06,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88067 states. [2021-06-06 00:31:08,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88067 to 49362. [2021-06-06 00:31:08,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49362 states, 49361 states have (on average 3.540305099167359) internal successors, (174753), 49361 states have internal predecessors, (174753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:08,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49362 states to 49362 states and 174753 transitions. [2021-06-06 00:31:08,519 INFO L78 Accepts]: Start accepts. Automaton has 49362 states and 174753 transitions. Word has length 38 [2021-06-06 00:31:08,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:31:08,519 INFO L482 AbstractCegarLoop]: Abstraction has 49362 states and 174753 transitions. [2021-06-06 00:31:08,519 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:08,519 INFO L276 IsEmpty]: Start isEmpty. Operand 49362 states and 174753 transitions. [2021-06-06 00:31:08,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-06 00:31:08,589 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:31:08,589 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:31:08,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-06-06 00:31:08,789 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:31:08,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:31:08,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1553189996, now seen corresponding path program 183 times [2021-06-06 00:31:08,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:31:08,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696027093] [2021-06-06 00:31:08,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:31:08,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:31:08,838 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:31:08,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:31:08,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696027093] [2021-06-06 00:31:08,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696027093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:08,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225279915] [2021-06-06 00:31:08,838 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 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:31:08,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-06 00:31:08,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:31:08,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-06 00:31:08,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:31:09,014 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 21 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:31:09,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225279915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:09,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:31:09,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-06-06 00:31:09,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549201274] [2021-06-06 00:31:09,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:31:09,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:31:09,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:31:09,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:31:09,015 INFO L87 Difference]: Start difference. First operand 49362 states and 174753 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:11,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:31:11,582 INFO L93 Difference]: Finished difference Result 86322 states and 295792 transitions. [2021-06-06 00:31:11,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2021-06-06 00:31:11,582 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-06 00:31:11,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:31:11,766 INFO L225 Difference]: With dead ends: 86322 [2021-06-06 00:31:11,766 INFO L226 Difference]: Without dead ends: 86314 [2021-06-06 00:31:11,767 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5591 ImplicationChecksByTransitivity, 1328.6ms TimeCoverageRelationStatistics Valid=2550, Invalid=11492, Unknown=0, NotChecked=0, Total=14042 [2021-06-06 00:31:11,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86314 states. [2021-06-06 00:31:13,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86314 to 49446. [2021-06-06 00:31:13,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49446 states, 49445 states have (on average 3.5396298917989686) internal successors, (175017), 49445 states have internal predecessors, (175017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:13,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49446 states to 49446 states and 175017 transitions. [2021-06-06 00:31:13,388 INFO L78 Accepts]: Start accepts. Automaton has 49446 states and 175017 transitions. Word has length 38 [2021-06-06 00:31:13,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:31:13,388 INFO L482 AbstractCegarLoop]: Abstraction has 49446 states and 175017 transitions. [2021-06-06 00:31:13,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:13,388 INFO L276 IsEmpty]: Start isEmpty. Operand 49446 states and 175017 transitions. [2021-06-06 00:31:13,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-06 00:31:13,460 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:31:13,460 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:31:13,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:31:13,660 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:31:13,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:31:13,661 INFO L82 PathProgramCache]: Analyzing trace with hash 416893534, now seen corresponding path program 184 times [2021-06-06 00:31:13,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:31:13,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578130065] [2021-06-06 00:31:13,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:31:13,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:31:13,717 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 6 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:31:13,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:31:13,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578130065] [2021-06-06 00:31:13,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578130065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:13,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395603372] [2021-06-06 00:31:13,717 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 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:31:13,740 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:31:13,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:31:13,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-06 00:31:13,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:31:14,177 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:31:14,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395603372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:14,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:31:14,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-06 00:31:14,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120890855] [2021-06-06 00:31:14,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-06 00:31:14,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:31:14,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-06 00:31:14,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-06-06 00:31:14,178 INFO L87 Difference]: Start difference. First operand 49446 states and 175017 transitions. Second operand has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:17,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:31:17,029 INFO L93 Difference]: Finished difference Result 87555 states and 298307 transitions. [2021-06-06 00:31:17,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2021-06-06 00:31:17,029 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-06 00:31:17,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:31:17,208 INFO L225 Difference]: With dead ends: 87555 [2021-06-06 00:31:17,208 INFO L226 Difference]: Without dead ends: 87555 [2021-06-06 00:31:17,209 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7844 ImplicationChecksByTransitivity, 1834.1ms TimeCoverageRelationStatistics Valid=3185, Invalid=15997, Unknown=0, NotChecked=0, Total=19182 [2021-06-06 00:31:17,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87555 states. [2021-06-06 00:31:18,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87555 to 49988. [2021-06-06 00:31:18,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49988 states, 49987 states have (on average 3.5363994638606036) internal successors, (176774), 49987 states have internal predecessors, (176774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:18,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49988 states to 49988 states and 176774 transitions. [2021-06-06 00:31:18,780 INFO L78 Accepts]: Start accepts. Automaton has 49988 states and 176774 transitions. Word has length 38 [2021-06-06 00:31:18,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:31:18,780 INFO L482 AbstractCegarLoop]: Abstraction has 49988 states and 176774 transitions. [2021-06-06 00:31:18,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:18,780 INFO L276 IsEmpty]: Start isEmpty. Operand 49988 states and 176774 transitions. [2021-06-06 00:31:18,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-06 00:31:18,851 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:31:18,851 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:31:19,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable219 [2021-06-06 00:31:19,052 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:31:19,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:31:19,052 INFO L82 PathProgramCache]: Analyzing trace with hash -638483860, now seen corresponding path program 185 times [2021-06-06 00:31:19,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:31:19,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746036657] [2021-06-06 00:31:19,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:31:19,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:31:19,110 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:31:19,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:31:19,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746036657] [2021-06-06 00:31:19,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746036657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:19,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633426190] [2021-06-06 00:31:19,110 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 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:31:19,138 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-06 00:31:19,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:31:19,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-06 00:31:19,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:31:19,304 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 21 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:31:19,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633426190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:19,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:31:19,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-06 00:31:19,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319018472] [2021-06-06 00:31:19,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-06 00:31:19,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:31:19,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-06 00:31:19,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-06-06 00:31:19,305 INFO L87 Difference]: Start difference. First operand 49988 states and 176774 transitions. Second operand has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:22,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:31:22,064 INFO L93 Difference]: Finished difference Result 84986 states and 291271 transitions. [2021-06-06 00:31:22,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2021-06-06 00:31:22,064 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-06 00:31:22,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:31:22,257 INFO L225 Difference]: With dead ends: 84986 [2021-06-06 00:31:22,257 INFO L226 Difference]: Without dead ends: 84978 [2021-06-06 00:31:22,259 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6339 ImplicationChecksByTransitivity, 1701.5ms TimeCoverageRelationStatistics Valid=2804, Invalid=13198, Unknown=0, NotChecked=0, Total=16002 [2021-06-06 00:31:22,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84978 states. [2021-06-06 00:31:23,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84978 to 49304. [2021-06-06 00:31:23,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49304 states, 49303 states have (on average 3.5395412043891854) internal successors, (174510), 49303 states have internal predecessors, (174510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:24,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49304 states to 49304 states and 174510 transitions. [2021-06-06 00:31:24,133 INFO L78 Accepts]: Start accepts. Automaton has 49304 states and 174510 transitions. Word has length 38 [2021-06-06 00:31:24,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:31:24,133 INFO L482 AbstractCegarLoop]: Abstraction has 49304 states and 174510 transitions. [2021-06-06 00:31:24,133 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:24,133 INFO L276 IsEmpty]: Start isEmpty. Operand 49304 states and 174510 transitions. [2021-06-06 00:31:24,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-06 00:31:24,210 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:31:24,210 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:31:24,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:31:24,411 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:31:24,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:31:24,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1522835556, now seen corresponding path program 186 times [2021-06-06 00:31:24,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:31:24,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967366703] [2021-06-06 00:31:24,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:31:24,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:31:24,469 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 6 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:31:24,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:31:24,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967366703] [2021-06-06 00:31:24,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967366703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:24,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942083240] [2021-06-06 00:31:24,470 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 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:31:24,496 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-06 00:31:24,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:31:24,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-06 00:31:24,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:31:24,634 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:31:24,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942083240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:24,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:31:24,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-06-06 00:31:24,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682904618] [2021-06-06 00:31:24,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:31:24,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:31:24,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:31:24,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:31:24,635 INFO L87 Difference]: Start difference. First operand 49304 states and 174510 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:26,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:31:26,774 INFO L93 Difference]: Finished difference Result 88014 states and 299703 transitions. [2021-06-06 00:31:26,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-06-06 00:31:26,774 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-06 00:31:26,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:31:26,963 INFO L225 Difference]: With dead ends: 88014 [2021-06-06 00:31:26,963 INFO L226 Difference]: Without dead ends: 88014 [2021-06-06 00:31:26,963 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3648 ImplicationChecksByTransitivity, 1327.2ms TimeCoverageRelationStatistics Valid=2002, Invalid=7898, Unknown=0, NotChecked=0, Total=9900 [2021-06-06 00:31:27,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88014 states. [2021-06-06 00:31:28,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88014 to 49460. [2021-06-06 00:31:28,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49460 states, 49459 states have (on average 3.5380011726884892) internal successors, (174986), 49459 states have internal predecessors, (174986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:28,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49460 states to 49460 states and 174986 transitions. [2021-06-06 00:31:28,559 INFO L78 Accepts]: Start accepts. Automaton has 49460 states and 174986 transitions. Word has length 38 [2021-06-06 00:31:28,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:31:28,560 INFO L482 AbstractCegarLoop]: Abstraction has 49460 states and 174986 transitions. [2021-06-06 00:31:28,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:28,560 INFO L276 IsEmpty]: Start isEmpty. Operand 49460 states and 174986 transitions. [2021-06-06 00:31:28,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-06 00:31:28,629 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:31:28,629 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:31:28,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable221,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:31:28,830 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:31:28,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:31:28,831 INFO L82 PathProgramCache]: Analyzing trace with hash 625615890, now seen corresponding path program 187 times [2021-06-06 00:31:28,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:31:28,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799746039] [2021-06-06 00:31:28,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:31:28,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:31:28,885 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:31:28,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:31:28,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799746039] [2021-06-06 00:31:28,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799746039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:28,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298033388] [2021-06-06 00:31:28,885 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 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:31:28,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:31:28,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-06 00:31:28,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:31:29,037 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 21 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:31:29,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298033388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:29,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:31:29,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-06-06 00:31:29,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63456288] [2021-06-06 00:31:29,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:31:29,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:31:29,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:31:29,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:31:29,038 INFO L87 Difference]: Start difference. First operand 49460 states and 174986 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)