/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-5.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a47a088281b0b97d17910950432b7c5b5bc3adeb-a47a088 [2021-07-13 19:23:44,127 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-13 19:23:44,130 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-13 19:23:44,169 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-13 19:23:44,245 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-07-13 19:23:44,280 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-13 19:23:44,281 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-13 19:23:44,281 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-13 19:23:44,281 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-13 19:23:44,284 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-13 19:23:44,284 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-13 19:23:44,284 INFO L138 SettingsManager]: * Use SBE=true [2021-07-13 19:23:44,284 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-13 19:23:44,285 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-13 19:23:44,285 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-13 19:23:44,286 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-13 19:23:44,286 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-13 19:23:44,286 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-13 19:23:44,286 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-13 19:23:44,286 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-13 19:23:44,286 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-13 19:23:44,287 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-13 19:23:44,287 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-13 19:23:44,287 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-13 19:23:44,287 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-13 19:23:44,287 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-13 19:23:44,287 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-13 19:23:44,288 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-13 19:23:44,288 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 19:23:44,288 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-13 19:23:44,288 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-13 19:23:44,288 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-13 19:23:44,288 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-13 19:23:44,289 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-13 19:23:44,289 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-13 19:23:44,289 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-13 19:23:44,289 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-13 19:23:44,625 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-13 19:23:44,647 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-13 19:23:44,650 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-13 19:23:44,651 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-13 19:23:44,652 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-13 19:23:44,653 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-5.wvr.bpl [2021-07-13 19:23:44,653 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-5.wvr.bpl' [2021-07-13 19:23:44,682 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-13 19:23:44,684 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-13 19:23:44,689 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-13 19:23:44,689 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-13 19:23:44,689 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-13 19:23:44,701 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:23:44" (1/1) ... [2021-07-13 19:23:44,709 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:23:44" (1/1) ... [2021-07-13 19:23:44,717 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-13 19:23:44,721 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-13 19:23:44,721 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-13 19:23:44,722 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-13 19:23:44,730 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:23:44" (1/1) ... [2021-07-13 19:23:44,730 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:23:44" (1/1) ... [2021-07-13 19:23:44,731 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:23:44" (1/1) ... [2021-07-13 19:23:44,731 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:23:44" (1/1) ... [2021-07-13 19:23:44,733 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:23:44" (1/1) ... [2021-07-13 19:23:44,735 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:23:44" (1/1) ... [2021-07-13 19:23:44,735 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:23:44" (1/1) ... [2021-07-13 19:23:44,736 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-13 19:23:44,738 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-13 19:23:44,738 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-13 19:23:44,738 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-13 19:23:44,741 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:23:44" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 19:23:44,810 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-13 19:23:44,811 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-13 19:23:44,812 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-13 19:23:44,812 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-13 19:23:44,812 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-13 19:23:44,812 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-13 19:23:44,812 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-13 19:23:44,812 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-13 19:23:44,813 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-13 19:23:44,814 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-13 19:23:45,108 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-13 19:23:45,108 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-07-13 19:23:45,114 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-07-13 19:23:45,115 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-07-13 19:23:45,116 INFO L202 PluginConnector]: Adding new model unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 07:23:45 BoogieIcfgContainer [2021-07-13 19:23:45,116 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-13 19:23:45,118 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-13 19:23:45,118 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-13 19:23:45,120 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-13 19:23:45,120 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:23:44" (1/2) ... [2021-07-13 19:23:45,121 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46b69f6c and model type unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 07:23:45, skipping insertion in model container [2021-07-13 19:23:45,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 07:23:45" (2/2) ... [2021-07-13 19:23:45,122 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-5.wvr.bpl [2021-07-13 19:23:45,127 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-13 19:23:45,127 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-13 19:23:45,128 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-13 19:23:45,128 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-13 19:23:45,182 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-07-13 19:23:45,211 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-07-13 19:23:45,237 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 19:23:45,237 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 19:23:45,237 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 19:23:45,237 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 19:23:45,237 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 19:23:45,237 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 19:23:45,238 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 19:23:45,238 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-13 19:23:45,248 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 46 flow [2021-07-13 19:23:45,259 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 13 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:45,261 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:45,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-07-13 19:23:45,267 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:45,267 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:45,268 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:45,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:45,274 INFO L82 PathProgramCache]: Analyzing trace with hash -551954567, now seen corresponding path program 1 times [2021-07-13 19:23:45,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:45,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879026058] [2021-07-13 19:23:45,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:45,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:45,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:45,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:45,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879026058] [2021-07-13 19:23:45,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879026058] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:23:45,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:23:45,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-13 19:23:45,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853636740] [2021-07-13 19:23:45,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 19:23:45,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:45,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 19:23:45,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 19:23:45,464 INFO L87 Difference]: Start difference. First operand has 13 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:45,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:45,497 INFO L93 Difference]: Finished difference Result 22 states and 38 transitions. [2021-07-13 19:23:45,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 19:23:45,498 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-07-13 19:23:45,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:45,508 INFO L225 Difference]: With dead ends: 22 [2021-07-13 19:23:45,508 INFO L226 Difference]: Without dead ends: 19 [2021-07-13 19:23:45,510 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 19:23:45,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-07-13 19:23:45,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-07-13 19:23:45,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:45,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 33 transitions. [2021-07-13 19:23:45,541 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 33 transitions. Word has length 9 [2021-07-13 19:23:45,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:45,542 INFO L482 AbstractCegarLoop]: Abstraction has 19 states and 33 transitions. [2021-07-13 19:23:45,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:45,543 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 33 transitions. [2021-07-13 19:23:45,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-07-13 19:23:45,544 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:45,544 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:45,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-13 19:23:45,545 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:45,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:45,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1013287513, now seen corresponding path program 1 times [2021-07-13 19:23:45,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:45,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149883060] [2021-07-13 19:23:45,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:45,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:45,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:45,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:45,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149883060] [2021-07-13 19:23:45,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149883060] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:45,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94247901] [2021-07-13 19:23:45,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:45,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:45,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 3 conjunts are in the unsatisfiable core [2021-07-13 19:23:45,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:45,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:45,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94247901] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:45,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:45,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2021-07-13 19:23:45,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451675358] [2021-07-13 19:23:45,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:23:45,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:45,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:23:45,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:23:45,797 INFO L87 Difference]: Start difference. First operand 19 states and 33 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:45,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:45,847 INFO L93 Difference]: Finished difference Result 28 states and 45 transitions. [2021-07-13 19:23:45,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 19:23:45,848 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-07-13 19:23:45,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:45,849 INFO L225 Difference]: With dead ends: 28 [2021-07-13 19:23:45,849 INFO L226 Difference]: Without dead ends: 28 [2021-07-13 19:23:45,849 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 40.1ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:23:45,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-07-13 19:23:45,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 19. [2021-07-13 19:23:45,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:45,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 35 transitions. [2021-07-13 19:23:45,853 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 35 transitions. Word has length 10 [2021-07-13 19:23:45,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:45,854 INFO L482 AbstractCegarLoop]: Abstraction has 19 states and 35 transitions. [2021-07-13 19:23:45,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:45,854 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 35 transitions. [2021-07-13 19:23:45,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-07-13 19:23:45,854 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:45,854 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:46,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-07-13 19:23:46,079 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:46,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:46,079 INFO L82 PathProgramCache]: Analyzing trace with hash 70002620, now seen corresponding path program 1 times [2021-07-13 19:23:46,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:46,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874965442] [2021-07-13 19:23:46,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:46,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:46,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:46,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:46,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874965442] [2021-07-13 19:23:46,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874965442] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:23:46,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:23:46,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 19:23:46,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843206511] [2021-07-13 19:23:46,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 19:23:46,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:46,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 19:23:46,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:23:46,114 INFO L87 Difference]: Start difference. First operand 19 states and 35 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:46,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:46,155 INFO L93 Difference]: Finished difference Result 22 states and 36 transitions. [2021-07-13 19:23:46,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:23:46,155 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-07-13 19:23:46,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:46,156 INFO L225 Difference]: With dead ends: 22 [2021-07-13 19:23:46,156 INFO L226 Difference]: Without dead ends: 18 [2021-07-13 19:23:46,156 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:23:46,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-07-13 19:23:46,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-07-13 19:23:46,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:46,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 31 transitions. [2021-07-13 19:23:46,159 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 31 transitions. Word has length 10 [2021-07-13 19:23:46,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:46,160 INFO L482 AbstractCegarLoop]: Abstraction has 18 states and 31 transitions. [2021-07-13 19:23:46,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:46,160 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 31 transitions. [2021-07-13 19:23:46,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-07-13 19:23:46,160 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:46,160 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:46,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-13 19:23:46,161 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:46,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:46,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1649223530, now seen corresponding path program 2 times [2021-07-13 19:23:46,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:46,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435330543] [2021-07-13 19:23:46,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:46,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:46,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:46,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:46,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435330543] [2021-07-13 19:23:46,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435330543] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:23:46,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:23:46,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 19:23:46,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494376114] [2021-07-13 19:23:46,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 19:23:46,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:46,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 19:23:46,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:23:46,215 INFO L87 Difference]: Start difference. First operand 18 states and 31 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:46,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:46,244 INFO L93 Difference]: Finished difference Result 20 states and 35 transitions. [2021-07-13 19:23:46,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 19:23:46,244 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-07-13 19:23:46,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:46,247 INFO L225 Difference]: With dead ends: 20 [2021-07-13 19:23:46,247 INFO L226 Difference]: Without dead ends: 20 [2021-07-13 19:23:46,247 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.7ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:23:46,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-07-13 19:23:46,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-07-13 19:23:46,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:46,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 35 transitions. [2021-07-13 19:23:46,256 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 35 transitions. Word has length 10 [2021-07-13 19:23:46,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:46,256 INFO L482 AbstractCegarLoop]: Abstraction has 20 states and 35 transitions. [2021-07-13 19:23:46,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:46,257 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 35 transitions. [2021-07-13 19:23:46,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-07-13 19:23:46,257 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:46,257 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:46,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-13 19:23:46,258 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:46,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:46,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1346416818, now seen corresponding path program 1 times [2021-07-13 19:23:46,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:46,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097734943] [2021-07-13 19:23:46,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:46,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:46,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:23:46,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:46,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097734943] [2021-07-13 19:23:46,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097734943] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:46,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827083185] [2021-07-13 19:23:46,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:46,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:46,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 19:23:46,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:46,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:23:46,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827083185] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:46,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:46,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-07-13 19:23:46,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918758338] [2021-07-13 19:23:46,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 19:23:46,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:46,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 19:23:46,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:23:46,384 INFO L87 Difference]: Start difference. First operand 20 states and 35 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:46,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:46,398 INFO L93 Difference]: Finished difference Result 24 states and 43 transitions. [2021-07-13 19:23:46,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 19:23:46,399 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-07-13 19:23:46,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:46,400 INFO L225 Difference]: With dead ends: 24 [2021-07-13 19:23:46,400 INFO L226 Difference]: Without dead ends: 24 [2021-07-13 19:23:46,400 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:23:46,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-07-13 19:23:46,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-07-13 19:23:46,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:46,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 43 transitions. [2021-07-13 19:23:46,403 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 43 transitions. Word has length 11 [2021-07-13 19:23:46,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:46,404 INFO L482 AbstractCegarLoop]: Abstraction has 24 states and 43 transitions. [2021-07-13 19:23:46,404 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:46,404 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 43 transitions. [2021-07-13 19:23:46,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-07-13 19:23:46,404 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:46,405 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:46,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:46,630 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:46,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:46,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1989220860, now seen corresponding path program 2 times [2021-07-13 19:23:46,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:46,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191518043] [2021-07-13 19:23:46,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:46,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:46,678 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:23:46,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:46,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191518043] [2021-07-13 19:23:46,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191518043] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:46,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067539789] [2021-07-13 19:23:46,679 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:46,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:23:46,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:23:46,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:23:46,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:46,759 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:23:46,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067539789] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:46,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:46,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-07-13 19:23:46,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318947917] [2021-07-13 19:23:46,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 19:23:46,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:46,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 19:23:46,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:23:46,761 INFO L87 Difference]: Start difference. First operand 24 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:46,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:46,797 INFO L93 Difference]: Finished difference Result 28 states and 51 transitions. [2021-07-13 19:23:46,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:23:46,798 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-07-13 19:23:46,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:46,799 INFO L225 Difference]: With dead ends: 28 [2021-07-13 19:23:46,799 INFO L226 Difference]: Without dead ends: 28 [2021-07-13 19:23:46,801 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 30.8ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:23:46,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-07-13 19:23:46,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-07-13 19:23:46,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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) [2021-07-13 19:23:46,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 51 transitions. [2021-07-13 19:23:46,805 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 51 transitions. Word has length 12 [2021-07-13 19:23:46,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:46,805 INFO L482 AbstractCegarLoop]: Abstraction has 28 states and 51 transitions. [2021-07-13 19:23:46,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:46,805 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 51 transitions. [2021-07-13 19:23:46,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:23:46,806 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:46,806 INFO L508 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:47,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:47,033 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:47,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:47,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1980193522, now seen corresponding path program 3 times [2021-07-13 19:23:47,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:47,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297185238] [2021-07-13 19:23:47,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:47,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:47,124 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:23:47,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:47,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297185238] [2021-07-13 19:23:47,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297185238] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:47,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368013272] [2021-07-13 19:23:47,125 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:47,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:23:47,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:23:47,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:23:47,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:47,231 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:23:47,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368013272] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:47,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:47,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-07-13 19:23:47,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288493654] [2021-07-13 19:23:47,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:23:47,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:47,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:23:47,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:23:47,233 INFO L87 Difference]: Start difference. First operand 28 states and 51 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:47,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:47,289 INFO L93 Difference]: Finished difference Result 32 states and 59 transitions. [2021-07-13 19:23:47,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 19:23:47,289 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-13 19:23:47,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:47,290 INFO L225 Difference]: With dead ends: 32 [2021-07-13 19:23:47,290 INFO L226 Difference]: Without dead ends: 32 [2021-07-13 19:23:47,290 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 63.5ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:23:47,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-07-13 19:23:47,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-07-13 19:23:47,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.903225806451613) internal successors, (59), 31 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) [2021-07-13 19:23:47,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 59 transitions. [2021-07-13 19:23:47,294 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 59 transitions. Word has length 13 [2021-07-13 19:23:47,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:47,294 INFO L482 AbstractCegarLoop]: Abstraction has 32 states and 59 transitions. [2021-07-13 19:23:47,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:47,295 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 59 transitions. [2021-07-13 19:23:47,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:23:47,295 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:47,295 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:47,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:47,519 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:47,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:47,519 INFO L82 PathProgramCache]: Analyzing trace with hash -477987780, now seen corresponding path program 4 times [2021-07-13 19:23:47,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:47,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700702810] [2021-07-13 19:23:47,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:47,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:47,613 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:23:47,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:47,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700702810] [2021-07-13 19:23:47,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700702810] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:47,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099453506] [2021-07-13 19:23:47,614 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 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 [2021-07-13 19:23:47,642 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:23:47,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:23:47,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 19:23:47,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:47,728 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:23:47,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099453506] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:47,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:47,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-07-13 19:23:47,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867361632] [2021-07-13 19:23:47,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:23:47,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:47,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:23:47,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:23:47,730 INFO L87 Difference]: Start difference. First operand 32 states and 59 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:47,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:47,764 INFO L93 Difference]: Finished difference Result 36 states and 67 transitions. [2021-07-13 19:23:47,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:23:47,764 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-13 19:23:47,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:47,765 INFO L225 Difference]: With dead ends: 36 [2021-07-13 19:23:47,765 INFO L226 Difference]: Without dead ends: 36 [2021-07-13 19:23:47,766 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 82.1ms TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:23:47,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-07-13 19:23:47,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-07-13 19:23:47,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 35 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) [2021-07-13 19:23:47,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 67 transitions. [2021-07-13 19:23:47,769 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 67 transitions. Word has length 14 [2021-07-13 19:23:47,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:47,769 INFO L482 AbstractCegarLoop]: Abstraction has 36 states and 67 transitions. [2021-07-13 19:23:47,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:47,770 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 67 transitions. [2021-07-13 19:23:47,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:23:47,770 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:47,770 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:47,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:47,997 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:47,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:47,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1154250034, now seen corresponding path program 5 times [2021-07-13 19:23:47,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:47,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485413835] [2021-07-13 19:23:47,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:48,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:48,082 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:48,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:48,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485413835] [2021-07-13 19:23:48,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485413835] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:48,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844868812] [2021-07-13 19:23:48,083 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:48,146 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:23:48,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:23:48,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:23:48,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:48,345 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:23:48,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-13 19:23:48,600 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:23:48,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:23:48,602 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:23:48,602 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-07-13 19:23:48,608 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:48,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844868812] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:48,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:48,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-07-13 19:23:48,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37082218] [2021-07-13 19:23:48,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:23:48,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:48,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:23:48,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:23:48,610 INFO L87 Difference]: Start difference. First operand 36 states and 67 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:48,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:48,738 INFO L93 Difference]: Finished difference Result 93 states and 165 transitions. [2021-07-13 19:23:48,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:23:48,739 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:23:48,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:48,742 INFO L225 Difference]: With dead ends: 93 [2021-07-13 19:23:48,742 INFO L226 Difference]: Without dead ends: 90 [2021-07-13 19:23:48,742 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 122.4ms TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:23:48,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-07-13 19:23:48,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 49. [2021-07-13 19:23:48,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 2.2083333333333335) internal successors, (106), 48 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:48,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 106 transitions. [2021-07-13 19:23:48,752 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 106 transitions. Word has length 15 [2021-07-13 19:23:48,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:48,752 INFO L482 AbstractCegarLoop]: Abstraction has 49 states and 106 transitions. [2021-07-13 19:23:48,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:48,752 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 106 transitions. [2021-07-13 19:23:48,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:23:48,752 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:48,753 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:48,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:48,972 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:48,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:48,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1304076458, now seen corresponding path program 6 times [2021-07-13 19:23:48,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:48,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157461294] [2021-07-13 19:23:48,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:48,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:49,025 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:23:49,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:49,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157461294] [2021-07-13 19:23:49,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157461294] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:49,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147965720] [2021-07-13 19:23:49,026 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:49,064 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:23:49,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:23:49,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:23:49,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:49,222 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:23:49,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-13 19:23:49,493 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:23:49,495 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:23:49,495 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:23:49,495 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-07-13 19:23:49,503 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:49,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147965720] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:49,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:49,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-07-13 19:23:49,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094756940] [2021-07-13 19:23:49,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:23:49,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:49,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:23:49,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:23:49,507 INFO L87 Difference]: Start difference. First operand 49 states and 106 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:49,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:49,616 INFO L93 Difference]: Finished difference Result 103 states and 198 transitions. [2021-07-13 19:23:49,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:23:49,617 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:23:49,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:49,619 INFO L225 Difference]: With dead ends: 103 [2021-07-13 19:23:49,619 INFO L226 Difference]: Without dead ends: 100 [2021-07-13 19:23:49,619 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 94.5ms TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:23:49,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-07-13 19:23:49,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 57. [2021-07-13 19:23:49,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.4107142857142856) internal successors, (135), 56 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:49,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 135 transitions. [2021-07-13 19:23:49,635 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 135 transitions. Word has length 15 [2021-07-13 19:23:49,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:49,635 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 135 transitions. [2021-07-13 19:23:49,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:49,636 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 135 transitions. [2021-07-13 19:23:49,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:23:49,636 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:49,636 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:49,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:49,861 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:49,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:49,861 INFO L82 PathProgramCache]: Analyzing trace with hash 930031036, now seen corresponding path program 7 times [2021-07-13 19:23:49,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:49,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771635308] [2021-07-13 19:23:49,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:49,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:49,913 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:23:49,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:49,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771635308] [2021-07-13 19:23:49,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771635308] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:49,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481814281] [2021-07-13 19:23:49,914 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:49,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:49,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:23:49,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:50,085 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:23:50,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-13 19:23:50,184 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:23:50,185 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:23:50,186 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:23:50,186 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-07-13 19:23:50,193 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:50,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481814281] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:50,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:50,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-07-13 19:23:50,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949715129] [2021-07-13 19:23:50,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:23:50,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:50,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:23:50,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:23:50,195 INFO L87 Difference]: Start difference. First operand 57 states and 135 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:50,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:50,292 INFO L93 Difference]: Finished difference Result 113 states and 231 transitions. [2021-07-13 19:23:50,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:23:50,292 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:23:50,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:50,293 INFO L225 Difference]: With dead ends: 113 [2021-07-13 19:23:50,293 INFO L226 Difference]: Without dead ends: 110 [2021-07-13 19:23:50,294 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 91.0ms TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:23:50,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-07-13 19:23:50,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 66. [2021-07-13 19:23:50,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.5692307692307694) internal successors, (167), 65 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:50,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 167 transitions. [2021-07-13 19:23:50,298 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 167 transitions. Word has length 15 [2021-07-13 19:23:50,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:50,298 INFO L482 AbstractCegarLoop]: Abstraction has 66 states and 167 transitions. [2021-07-13 19:23:50,298 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:50,299 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 167 transitions. [2021-07-13 19:23:50,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:23:50,299 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:50,299 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:50,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-07-13 19:23:50,513 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:50,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:50,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1467886614, now seen corresponding path program 8 times [2021-07-13 19:23:50,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:50,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121389184] [2021-07-13 19:23:50,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:50,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:50,559 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:23:50,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:50,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121389184] [2021-07-13 19:23:50,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121389184] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:50,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857316356] [2021-07-13 19:23:50,560 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:50,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:23:50,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:23:50,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:23:50,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:50,741 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:23:50,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-13 19:23:50,853 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:23:50,855 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:23:50,855 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:23:50,855 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-07-13 19:23:50,863 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:50,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857316356] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:50,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:50,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-07-13 19:23:50,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581968514] [2021-07-13 19:23:50,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:23:50,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:50,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:23:50,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:23:50,865 INFO L87 Difference]: Start difference. First operand 66 states and 167 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:50,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:50,965 INFO L93 Difference]: Finished difference Result 124 states and 267 transitions. [2021-07-13 19:23:50,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:23:50,966 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:23:50,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:50,967 INFO L225 Difference]: With dead ends: 124 [2021-07-13 19:23:50,967 INFO L226 Difference]: Without dead ends: 121 [2021-07-13 19:23:50,967 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 92.4ms TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:23:50,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-07-13 19:23:50,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 76. [2021-07-13 19:23:50,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.6933333333333334) internal successors, (202), 75 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:50,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 202 transitions. [2021-07-13 19:23:50,980 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 202 transitions. Word has length 15 [2021-07-13 19:23:50,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:50,981 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 202 transitions. [2021-07-13 19:23:50,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:50,981 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 202 transitions. [2021-07-13 19:23:50,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:23:50,986 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:50,986 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:51,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:51,201 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:51,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:51,201 INFO L82 PathProgramCache]: Analyzing trace with hash 961540348, now seen corresponding path program 9 times [2021-07-13 19:23:51,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:51,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642611533] [2021-07-13 19:23:51,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:51,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:51,254 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:23:51,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:51,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642611533] [2021-07-13 19:23:51,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642611533] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:51,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161937281] [2021-07-13 19:23:51,255 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:51,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:23:51,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:23:51,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:23:51,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:51,410 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:23:51,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-13 19:23:51,476 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:23:51,478 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:23:51,478 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:23:51,479 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-07-13 19:23:51,486 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:51,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161937281] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:51,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:51,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-07-13 19:23:51,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433713735] [2021-07-13 19:23:51,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:23:51,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:51,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:23:51,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:23:51,488 INFO L87 Difference]: Start difference. First operand 76 states and 202 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:51,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:51,566 INFO L93 Difference]: Finished difference Result 136 states and 306 transitions. [2021-07-13 19:23:51,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:23:51,566 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:23:51,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:51,567 INFO L225 Difference]: With dead ends: 136 [2021-07-13 19:23:51,567 INFO L226 Difference]: Without dead ends: 133 [2021-07-13 19:23:51,568 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 92.4ms TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:23:51,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-07-13 19:23:51,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 87. [2021-07-13 19:23:51,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.7906976744186047) internal successors, (240), 86 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:51,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 240 transitions. [2021-07-13 19:23:51,571 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 240 transitions. Word has length 15 [2021-07-13 19:23:51,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:51,571 INFO L482 AbstractCegarLoop]: Abstraction has 87 states and 240 transitions. [2021-07-13 19:23:51,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:51,572 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 240 transitions. [2021-07-13 19:23:51,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:23:51,572 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:51,572 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:51,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-07-13 19:23:51,797 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:51,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:51,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1850292010, now seen corresponding path program 10 times [2021-07-13 19:23:51,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:51,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001180680] [2021-07-13 19:23:51,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:51,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:51,840 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:23:51,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:51,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001180680] [2021-07-13 19:23:51,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001180680] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:51,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810192415] [2021-07-13 19:23:51,840 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:51,869 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:23:51,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:23:51,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:23:51,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:51,997 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:23:51,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-13 19:23:52,045 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:23:52,047 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:23:52,048 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:23:52,048 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-07-13 19:23:52,055 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:52,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810192415] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:52,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:52,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-07-13 19:23:52,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908024922] [2021-07-13 19:23:52,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:23:52,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:52,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:23:52,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:23:52,057 INFO L87 Difference]: Start difference. First operand 87 states and 240 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:52,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:52,152 INFO L93 Difference]: Finished difference Result 149 states and 348 transitions. [2021-07-13 19:23:52,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:23:52,152 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:23:52,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:52,154 INFO L225 Difference]: With dead ends: 149 [2021-07-13 19:23:52,154 INFO L226 Difference]: Without dead ends: 146 [2021-07-13 19:23:52,154 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 94.7ms TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:23:52,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-07-13 19:23:52,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 100. [2021-07-13 19:23:52,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.8484848484848486) internal successors, (282), 99 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:52,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 282 transitions. [2021-07-13 19:23:52,158 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 282 transitions. Word has length 15 [2021-07-13 19:23:52,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:52,158 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 282 transitions. [2021-07-13 19:23:52,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:52,159 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 282 transitions. [2021-07-13 19:23:52,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:23:52,159 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:52,159 INFO L508 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:52,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:52,384 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:52,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:52,385 INFO L82 PathProgramCache]: Analyzing trace with hash -643543428, now seen corresponding path program 11 times [2021-07-13 19:23:52,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:52,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915034040] [2021-07-13 19:23:52,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:52,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:52,454 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:52,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:52,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915034040] [2021-07-13 19:23:52,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915034040] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:52,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102899696] [2021-07-13 19:23:52,454 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:52,496 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:23:52,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:23:52,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:23:52,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:52,551 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:52,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102899696] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:52,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:52,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-13 19:23:52,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755645757] [2021-07-13 19:23:52,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:23:52,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:52,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:23:52,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:23:52,553 INFO L87 Difference]: Start difference. First operand 100 states and 282 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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) [2021-07-13 19:23:52,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:52,671 INFO L93 Difference]: Finished difference Result 171 states and 375 transitions. [2021-07-13 19:23:52,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:23:52,671 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 16 [2021-07-13 19:23:52,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:52,673 INFO L225 Difference]: With dead ends: 171 [2021-07-13 19:23:52,673 INFO L226 Difference]: Without dead ends: 171 [2021-07-13 19:23:52,673 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 101.5ms TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:23:52,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-07-13 19:23:52,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 103. [2021-07-13 19:23:52,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.843137254901961) internal successors, (290), 102 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:52,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 290 transitions. [2021-07-13 19:23:52,677 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 290 transitions. Word has length 16 [2021-07-13 19:23:52,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:52,677 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 290 transitions. [2021-07-13 19:23:52,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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) [2021-07-13 19:23:52,678 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 290 transitions. [2021-07-13 19:23:52,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:23:52,678 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:52,678 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:52,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-07-13 19:23:52,902 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:52,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:52,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1421287673, now seen corresponding path program 12 times [2021-07-13 19:23:52,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:52,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193239091] [2021-07-13 19:23:52,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:52,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:52,980 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:52,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:52,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193239091] [2021-07-13 19:23:52,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193239091] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:52,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488914968] [2021-07-13 19:23:52,981 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:53,013 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:23:53,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:23:53,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:23:53,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:53,054 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:53,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488914968] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:53,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:53,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-13 19:23:53,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165062329] [2021-07-13 19:23:53,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:23:53,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:53,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:23:53,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:23:53,056 INFO L87 Difference]: Start difference. First operand 103 states and 290 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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) [2021-07-13 19:23:53,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:53,225 INFO L93 Difference]: Finished difference Result 207 states and 463 transitions. [2021-07-13 19:23:53,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:23:53,226 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 16 [2021-07-13 19:23:53,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:53,227 INFO L225 Difference]: With dead ends: 207 [2021-07-13 19:23:53,227 INFO L226 Difference]: Without dead ends: 202 [2021-07-13 19:23:53,228 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 148.3ms TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:23:53,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-07-13 19:23:53,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 125. [2021-07-13 19:23:53,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.838709677419355) internal successors, (352), 124 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:53,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 352 transitions. [2021-07-13 19:23:53,235 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 352 transitions. Word has length 16 [2021-07-13 19:23:53,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:53,235 INFO L482 AbstractCegarLoop]: Abstraction has 125 states and 352 transitions. [2021-07-13 19:23:53,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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) [2021-07-13 19:23:53,235 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 352 transitions. [2021-07-13 19:23:53,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:23:53,235 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:53,235 INFO L508 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:53,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-07-13 19:23:53,449 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:53,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:53,449 INFO L82 PathProgramCache]: Analyzing trace with hash 946722458, now seen corresponding path program 13 times [2021-07-13 19:23:53,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:53,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566785238] [2021-07-13 19:23:53,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:53,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:53,501 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:53,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:53,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566785238] [2021-07-13 19:23:53,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566785238] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:53,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766762664] [2021-07-13 19:23:53,501 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:53,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:53,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:23:53,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:53,565 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:53,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766762664] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:53,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:53,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-13 19:23:53,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896733930] [2021-07-13 19:23:53,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:23:53,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:53,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:23:53,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:23:53,567 INFO L87 Difference]: Start difference. First operand 125 states and 352 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-13 19:23:53,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:53,686 INFO L93 Difference]: Finished difference Result 152 states and 389 transitions. [2021-07-13 19:23:53,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:23:53,686 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 16 [2021-07-13 19:23:53,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:53,687 INFO L225 Difference]: With dead ends: 152 [2021-07-13 19:23:53,687 INFO L226 Difference]: Without dead ends: 151 [2021-07-13 19:23:53,688 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 88.7ms TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:23:53,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-07-13 19:23:53,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 126. [2021-07-13 19:23:53,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.816) internal successors, (352), 125 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:53,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 352 transitions. [2021-07-13 19:23:53,691 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 352 transitions. Word has length 16 [2021-07-13 19:23:53,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:53,692 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 352 transitions. [2021-07-13 19:23:53,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-13 19:23:53,692 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 352 transitions. [2021-07-13 19:23:53,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:23:53,692 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:53,692 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:53,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:53,917 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:53,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:53,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1869141191, now seen corresponding path program 14 times [2021-07-13 19:23:53,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:53,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757631302] [2021-07-13 19:23:53,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:53,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:53,969 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:53,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:53,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757631302] [2021-07-13 19:23:53,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757631302] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:53,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036487231] [2021-07-13 19:23:53,970 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 [2021-07-13 19:23:54,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:23:54,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:23:54,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:23:54,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:54,054 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:54,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036487231] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:54,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:54,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-13 19:23:54,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136939825] [2021-07-13 19:23:54,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:23:54,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:54,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:23:54,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:23:54,056 INFO L87 Difference]: Start difference. First operand 126 states and 352 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-13 19:23:54,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:54,108 INFO L93 Difference]: Finished difference Result 214 states and 476 transitions. [2021-07-13 19:23:54,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:23:54,109 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 16 [2021-07-13 19:23:54,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:54,111 INFO L225 Difference]: With dead ends: 214 [2021-07-13 19:23:54,111 INFO L226 Difference]: Without dead ends: 214 [2021-07-13 19:23:54,111 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 43.3ms TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:23:54,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-07-13 19:23:54,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 126. [2021-07-13 19:23:54,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.816) internal successors, (352), 125 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:54,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 352 transitions. [2021-07-13 19:23:54,116 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 352 transitions. Word has length 16 [2021-07-13 19:23:54,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:54,116 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 352 transitions. [2021-07-13 19:23:54,116 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-13 19:23:54,116 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 352 transitions. [2021-07-13 19:23:54,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:23:54,119 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:54,119 INFO L508 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:54,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2021-07-13 19:23:54,343 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:54,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:54,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1440737642, now seen corresponding path program 15 times [2021-07-13 19:23:54,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:54,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223022098] [2021-07-13 19:23:54,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:54,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:54,402 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:54,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:54,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223022098] [2021-07-13 19:23:54,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223022098] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:54,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998286796] [2021-07-13 19:23:54,403 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:54,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:23:54,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:23:54,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:23:54,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:54,485 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:23:54,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998286796] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:54,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:54,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-13 19:23:54,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804899955] [2021-07-13 19:23:54,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:23:54,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:54,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:23:54,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:23:54,487 INFO L87 Difference]: Start difference. First operand 126 states and 352 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-13 19:23:54,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:54,552 INFO L93 Difference]: Finished difference Result 211 states and 472 transitions. [2021-07-13 19:23:54,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:23:54,552 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 16 [2021-07-13 19:23:54,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:54,553 INFO L225 Difference]: With dead ends: 211 [2021-07-13 19:23:54,553 INFO L226 Difference]: Without dead ends: 211 [2021-07-13 19:23:54,554 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 61.5ms TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:23:54,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-07-13 19:23:54,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 132. [2021-07-13 19:23:54,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.8091603053435112) internal successors, (368), 131 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:54,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 368 transitions. [2021-07-13 19:23:54,558 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 368 transitions. Word has length 16 [2021-07-13 19:23:54,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:54,558 INFO L482 AbstractCegarLoop]: Abstraction has 132 states and 368 transitions. [2021-07-13 19:23:54,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-13 19:23:54,558 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 368 transitions. [2021-07-13 19:23:54,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:23:54,559 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:54,559 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:54,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:54,784 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:54,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:54,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1770939521, now seen corresponding path program 16 times [2021-07-13 19:23:54,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:54,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47514331] [2021-07-13 19:23:54,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:54,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:54,836 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:54,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:54,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47514331] [2021-07-13 19:23:54,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47514331] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:54,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173206839] [2021-07-13 19:23:54,837 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:54,865 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:23:54,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:23:54,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:23:54,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:54,908 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:23:54,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173206839] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:54,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:54,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-13 19:23:54,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258959338] [2021-07-13 19:23:54,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:23:54,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:54,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:23:54,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:23:54,909 INFO L87 Difference]: Start difference. First operand 132 states and 368 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-13 19:23:55,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:55,021 INFO L93 Difference]: Finished difference Result 225 states and 509 transitions. [2021-07-13 19:23:55,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:23:55,022 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 16 [2021-07-13 19:23:55,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:55,023 INFO L225 Difference]: With dead ends: 225 [2021-07-13 19:23:55,023 INFO L226 Difference]: Without dead ends: 223 [2021-07-13 19:23:55,023 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 74.7ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:23:55,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-07-13 19:23:55,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 139. [2021-07-13 19:23:55,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.8550724637681157) internal successors, (394), 138 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:55,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 394 transitions. [2021-07-13 19:23:55,028 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 394 transitions. Word has length 16 [2021-07-13 19:23:55,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:55,028 INFO L482 AbstractCegarLoop]: Abstraction has 139 states and 394 transitions. [2021-07-13 19:23:55,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-13 19:23:55,029 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 394 transitions. [2021-07-13 19:23:55,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:23:55,029 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:55,029 INFO L508 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:55,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:55,245 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:55,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:55,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1114137344, now seen corresponding path program 17 times [2021-07-13 19:23:55,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:55,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792785809] [2021-07-13 19:23:55,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:55,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:55,310 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:55,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:55,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792785809] [2021-07-13 19:23:55,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792785809] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:55,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212643608] [2021-07-13 19:23:55,311 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:55,358 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:23:55,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:23:55,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:23:55,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:55,394 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:55,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212643608] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:55,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:55,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-13 19:23:55,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026479127] [2021-07-13 19:23:55,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:23:55,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:55,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:23:55,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:23:55,396 INFO L87 Difference]: Start difference. First operand 139 states and 394 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-13 19:23:55,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:55,494 INFO L93 Difference]: Finished difference Result 206 states and 478 transitions. [2021-07-13 19:23:55,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:23:55,495 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 16 [2021-07-13 19:23:55,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:55,496 INFO L225 Difference]: With dead ends: 206 [2021-07-13 19:23:55,496 INFO L226 Difference]: Without dead ends: 205 [2021-07-13 19:23:55,496 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 83.3ms TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:23:55,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-07-13 19:23:55,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 139. [2021-07-13 19:23:55,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.847826086956522) internal successors, (393), 138 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:55,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 393 transitions. [2021-07-13 19:23:55,502 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 393 transitions. Word has length 16 [2021-07-13 19:23:55,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:55,502 INFO L482 AbstractCegarLoop]: Abstraction has 139 states and 393 transitions. [2021-07-13 19:23:55,503 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-13 19:23:55,503 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 393 transitions. [2021-07-13 19:23:55,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:23:55,504 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:55,504 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:55,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:55,721 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:55,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:55,721 INFO L82 PathProgramCache]: Analyzing trace with hash -191718611, now seen corresponding path program 18 times [2021-07-13 19:23:55,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:55,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091765911] [2021-07-13 19:23:55,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:55,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:55,768 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:55,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:55,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091765911] [2021-07-13 19:23:55,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091765911] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:55,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546831066] [2021-07-13 19:23:55,769 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:55,804 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:23:55,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:23:55,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:23:55,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:55,849 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:55,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546831066] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:55,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:55,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-13 19:23:55,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372523207] [2021-07-13 19:23:55,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:23:55,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:55,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:23:55,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:23:55,850 INFO L87 Difference]: Start difference. First operand 139 states and 393 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-13 19:23:55,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:55,895 INFO L93 Difference]: Finished difference Result 231 states and 521 transitions. [2021-07-13 19:23:55,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:23:55,895 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 16 [2021-07-13 19:23:55,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:55,896 INFO L225 Difference]: With dead ends: 231 [2021-07-13 19:23:55,896 INFO L226 Difference]: Without dead ends: 231 [2021-07-13 19:23:55,896 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 41.3ms TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:23:55,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-07-13 19:23:55,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 139. [2021-07-13 19:23:55,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.847826086956522) internal successors, (393), 138 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:55,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 393 transitions. [2021-07-13 19:23:55,901 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 393 transitions. Word has length 16 [2021-07-13 19:23:55,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:55,901 INFO L482 AbstractCegarLoop]: Abstraction has 139 states and 393 transitions. [2021-07-13 19:23:55,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-13 19:23:55,901 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 393 transitions. [2021-07-13 19:23:55,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:23:55,902 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:55,902 INFO L508 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:56,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:56,113 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:56,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:56,113 INFO L82 PathProgramCache]: Analyzing trace with hash 596475964, now seen corresponding path program 19 times [2021-07-13 19:23:56,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:56,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013142113] [2021-07-13 19:23:56,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:56,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:56,160 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:56,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:56,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013142113] [2021-07-13 19:23:56,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013142113] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:56,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682545672] [2021-07-13 19:23:56,161 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:56,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:56,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:23:56,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:56,238 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:56,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682545672] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:56,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:56,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-13 19:23:56,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909244119] [2021-07-13 19:23:56,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:23:56,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:56,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:23:56,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:23:56,240 INFO L87 Difference]: Start difference. First operand 139 states and 393 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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) [2021-07-13 19:23:56,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:56,371 INFO L93 Difference]: Finished difference Result 181 states and 451 transitions. [2021-07-13 19:23:56,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:23:56,372 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 16 [2021-07-13 19:23:56,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:56,373 INFO L225 Difference]: With dead ends: 181 [2021-07-13 19:23:56,373 INFO L226 Difference]: Without dead ends: 179 [2021-07-13 19:23:56,373 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 86.1ms TimeCoverageRelationStatistics Valid=107, Invalid=199, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:23:56,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-07-13 19:23:56,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 140. [2021-07-13 19:23:56,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.8345323741007196) internal successors, (394), 139 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:56,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 394 transitions. [2021-07-13 19:23:56,378 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 394 transitions. Word has length 16 [2021-07-13 19:23:56,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:56,378 INFO L482 AbstractCegarLoop]: Abstraction has 140 states and 394 transitions. [2021-07-13 19:23:56,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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) [2021-07-13 19:23:56,378 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 394 transitions. [2021-07-13 19:23:56,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:23:56,378 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:56,379 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:56,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-07-13 19:23:56,598 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:56,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:56,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1920765945, now seen corresponding path program 20 times [2021-07-13 19:23:56,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:56,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002928641] [2021-07-13 19:23:56,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:56,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:56,646 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:56,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:56,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002928641] [2021-07-13 19:23:56,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002928641] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:56,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338593078] [2021-07-13 19:23:56,646 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:56,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:23:56,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:23:56,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:23:56,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:56,734 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:56,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338593078] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:56,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:56,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-13 19:23:56,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205284634] [2021-07-13 19:23:56,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:23:56,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:56,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:23:56,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:23:56,735 INFO L87 Difference]: Start difference. First operand 140 states and 394 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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) [2021-07-13 19:23:56,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:56,802 INFO L93 Difference]: Finished difference Result 248 states and 551 transitions. [2021-07-13 19:23:56,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:23:56,802 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 16 [2021-07-13 19:23:56,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:56,804 INFO L225 Difference]: With dead ends: 248 [2021-07-13 19:23:56,804 INFO L226 Difference]: Without dead ends: 248 [2021-07-13 19:23:56,804 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 58.3ms TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:23:56,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-07-13 19:23:56,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 140. [2021-07-13 19:23:56,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.8345323741007196) internal successors, (394), 139 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:56,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 394 transitions. [2021-07-13 19:23:56,811 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 394 transitions. Word has length 16 [2021-07-13 19:23:56,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:56,811 INFO L482 AbstractCegarLoop]: Abstraction has 140 states and 394 transitions. [2021-07-13 19:23:56,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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) [2021-07-13 19:23:56,812 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 394 transitions. [2021-07-13 19:23:56,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:23:56,812 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:56,812 INFO L508 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:57,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-07-13 19:23:57,021 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:57,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:57,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1978593220, now seen corresponding path program 21 times [2021-07-13 19:23:57,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:57,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709464145] [2021-07-13 19:23:57,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:57,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:57,068 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:57,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:57,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709464145] [2021-07-13 19:23:57,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709464145] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:57,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529852743] [2021-07-13 19:23:57,068 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:57,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:23:57,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:23:57,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:23:57,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:57,153 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:23:57,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529852743] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:57,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:57,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-13 19:23:57,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713676960] [2021-07-13 19:23:57,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:23:57,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:57,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:23:57,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:23:57,154 INFO L87 Difference]: Start difference. First operand 140 states and 394 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-13 19:23:57,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:57,222 INFO L93 Difference]: Finished difference Result 230 states and 525 transitions. [2021-07-13 19:23:57,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:23:57,225 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 16 [2021-07-13 19:23:57,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:57,226 INFO L225 Difference]: With dead ends: 230 [2021-07-13 19:23:57,226 INFO L226 Difference]: Without dead ends: 230 [2021-07-13 19:23:57,226 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 54.5ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:23:57,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-07-13 19:23:57,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 146. [2021-07-13 19:23:57,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.8413793103448275) internal successors, (412), 145 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:57,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 412 transitions. [2021-07-13 19:23:57,232 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 412 transitions. Word has length 16 [2021-07-13 19:23:57,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:57,232 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 412 transitions. [2021-07-13 19:23:57,232 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-13 19:23:57,232 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 412 transitions. [2021-07-13 19:23:57,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:23:57,233 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:57,233 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:57,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:57,453 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:57,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:57,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1233083943, now seen corresponding path program 22 times [2021-07-13 19:23:57,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:57,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495882671] [2021-07-13 19:23:57,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:57,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:57,499 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:57,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:57,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495882671] [2021-07-13 19:23:57,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495882671] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:57,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776531751] [2021-07-13 19:23:57,500 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:57,530 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:23:57,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:23:57,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:23:57,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:57,564 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:23:57,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776531751] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:57,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:57,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-13 19:23:57,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673700283] [2021-07-13 19:23:57,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:23:57,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:57,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:23:57,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:23:57,565 INFO L87 Difference]: Start difference. First operand 146 states and 412 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-13 19:23:57,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:57,673 INFO L93 Difference]: Finished difference Result 240 states and 554 transitions. [2021-07-13 19:23:57,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:23:57,673 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 16 [2021-07-13 19:23:57,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:57,674 INFO L225 Difference]: With dead ends: 240 [2021-07-13 19:23:57,674 INFO L226 Difference]: Without dead ends: 238 [2021-07-13 19:23:57,675 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 72.5ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:23:57,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-07-13 19:23:57,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 155. [2021-07-13 19:23:57,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.883116883116883) internal successors, (444), 154 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:57,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 444 transitions. [2021-07-13 19:23:57,680 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 444 transitions. Word has length 16 [2021-07-13 19:23:57,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:57,680 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 444 transitions. [2021-07-13 19:23:57,681 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-13 19:23:57,681 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 444 transitions. [2021-07-13 19:23:57,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:23:57,681 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:57,681 INFO L508 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:57,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-07-13 19:23:57,906 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:57,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:57,907 INFO L82 PathProgramCache]: Analyzing trace with hash -576281766, now seen corresponding path program 23 times [2021-07-13 19:23:57,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:57,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257252571] [2021-07-13 19:23:57,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:57,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:57,959 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:57,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:57,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257252571] [2021-07-13 19:23:57,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257252571] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:57,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9092780] [2021-07-13 19:23:57,960 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:57,983 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:23:57,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:23:57,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:23:57,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:58,031 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:58,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9092780] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:58,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:58,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-13 19:23:58,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023632088] [2021-07-13 19:23:58,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:23:58,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:58,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:23:58,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:23:58,033 INFO L87 Difference]: Start difference. First operand 155 states and 444 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-13 19:23:58,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:58,141 INFO L93 Difference]: Finished difference Result 229 states and 540 transitions. [2021-07-13 19:23:58,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:23:58,142 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 16 [2021-07-13 19:23:58,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:58,143 INFO L225 Difference]: With dead ends: 229 [2021-07-13 19:23:58,143 INFO L226 Difference]: Without dead ends: 228 [2021-07-13 19:23:58,143 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 72.8ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:23:58,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-07-13 19:23:58,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 155. [2021-07-13 19:23:58,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.8766233766233764) internal successors, (443), 154 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:58,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 443 transitions. [2021-07-13 19:23:58,148 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 443 transitions. Word has length 16 [2021-07-13 19:23:58,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:58,148 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 443 transitions. [2021-07-13 19:23:58,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-13 19:23:58,148 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 443 transitions. [2021-07-13 19:23:58,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:23:58,149 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:58,149 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:58,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:58,361 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:58,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:58,361 INFO L82 PathProgramCache]: Analyzing trace with hash 346136967, now seen corresponding path program 24 times [2021-07-13 19:23:58,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:58,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571010409] [2021-07-13 19:23:58,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:58,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:58,405 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:58,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:58,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571010409] [2021-07-13 19:23:58,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571010409] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:58,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415990683] [2021-07-13 19:23:58,406 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:58,444 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:23:58,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:23:58,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:23:58,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:58,477 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:58,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415990683] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:58,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:58,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-13 19:23:58,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022951436] [2021-07-13 19:23:58,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:23:58,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:58,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:23:58,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:23:58,479 INFO L87 Difference]: Start difference. First operand 155 states and 443 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-13 19:23:58,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:58,524 INFO L93 Difference]: Finished difference Result 244 states and 562 transitions. [2021-07-13 19:23:58,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:23:58,525 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 16 [2021-07-13 19:23:58,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:58,528 INFO L225 Difference]: With dead ends: 244 [2021-07-13 19:23:58,528 INFO L226 Difference]: Without dead ends: 244 [2021-07-13 19:23:58,528 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 39.0ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:23:58,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-07-13 19:23:58,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 155. [2021-07-13 19:23:58,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.8766233766233764) internal successors, (443), 154 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:58,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 443 transitions. [2021-07-13 19:23:58,534 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 443 transitions. Word has length 16 [2021-07-13 19:23:58,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:58,534 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 443 transitions. [2021-07-13 19:23:58,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-13 19:23:58,534 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 443 transitions. [2021-07-13 19:23:58,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:23:58,535 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:58,535 INFO L508 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:58,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2021-07-13 19:23:58,759 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:58,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:58,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1134331542, now seen corresponding path program 25 times [2021-07-13 19:23:58,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:58,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721246202] [2021-07-13 19:23:58,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:58,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:58,806 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:58,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:58,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721246202] [2021-07-13 19:23:58,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721246202] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:58,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370115721] [2021-07-13 19:23:58,807 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:58,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:58,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:23:58,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:58,877 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:58,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370115721] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:58,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:58,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-13 19:23:58,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988104833] [2021-07-13 19:23:58,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:23:58,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:58,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:23:58,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:23:58,880 INFO L87 Difference]: Start difference. First operand 155 states and 443 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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) [2021-07-13 19:23:59,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:59,002 INFO L93 Difference]: Finished difference Result 234 states and 546 transitions. [2021-07-13 19:23:59,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:23:59,003 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 16 [2021-07-13 19:23:59,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:59,004 INFO L225 Difference]: With dead ends: 234 [2021-07-13 19:23:59,004 INFO L226 Difference]: Without dead ends: 232 [2021-07-13 19:23:59,005 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 81.4ms TimeCoverageRelationStatistics Valid=108, Invalid=198, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:23:59,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-07-13 19:23:59,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 155. [2021-07-13 19:23:59,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.8701298701298703) internal successors, (442), 154 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:59,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 442 transitions. [2021-07-13 19:23:59,009 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 442 transitions. Word has length 16 [2021-07-13 19:23:59,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:59,009 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 442 transitions. [2021-07-13 19:23:59,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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) [2021-07-13 19:23:59,010 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 442 transitions. [2021-07-13 19:23:59,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:23:59,010 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:59,010 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:59,211 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:59,211 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:59,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:59,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1382910367, now seen corresponding path program 26 times [2021-07-13 19:23:59,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:59,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566140469] [2021-07-13 19:23:59,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:59,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:59,260 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:59,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:59,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566140469] [2021-07-13 19:23:59,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566140469] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:59,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029266437] [2021-07-13 19:23:59,261 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:59,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:23:59,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:23:59,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:23:59,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:59,334 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:59,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029266437] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:59,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:59,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-13 19:23:59,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934522746] [2021-07-13 19:23:59,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:23:59,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:59,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:23:59,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:23:59,336 INFO L87 Difference]: Start difference. First operand 155 states and 442 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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) [2021-07-13 19:23:59,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:59,428 INFO L93 Difference]: Finished difference Result 257 states and 584 transitions. [2021-07-13 19:23:59,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:23:59,428 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 16 [2021-07-13 19:23:59,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:59,430 INFO L225 Difference]: With dead ends: 257 [2021-07-13 19:23:59,430 INFO L226 Difference]: Without dead ends: 257 [2021-07-13 19:23:59,431 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 61.7ms TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:23:59,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-07-13 19:23:59,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 155. [2021-07-13 19:23:59,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.8701298701298703) internal successors, (442), 154 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:59,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 442 transitions. [2021-07-13 19:23:59,437 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 442 transitions. Word has length 16 [2021-07-13 19:23:59,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:59,437 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 442 transitions. [2021-07-13 19:23:59,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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) [2021-07-13 19:23:59,438 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 442 transitions. [2021-07-13 19:23:59,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:23:59,438 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:59,438 INFO L508 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:59,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:59,657 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:59,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:59,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1671230758, now seen corresponding path program 27 times [2021-07-13 19:23:59,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:59,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876546760] [2021-07-13 19:23:59,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:59,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:59,713 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:59,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:59,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876546760] [2021-07-13 19:23:59,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876546760] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:59,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113363320] [2021-07-13 19:23:59,713 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:59,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:23:59,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:23:59,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:23:59,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:59,837 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:23:59,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113363320] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:59,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:59,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-07-13 19:23:59,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587136946] [2021-07-13 19:23:59,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:23:59,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:59,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:23:59,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:23:59,838 INFO L87 Difference]: Start difference. First operand 155 states and 442 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:00,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:00,150 INFO L93 Difference]: Finished difference Result 265 states and 708 transitions. [2021-07-13 19:24:00,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:24:00,151 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:24:00,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:00,152 INFO L225 Difference]: With dead ends: 265 [2021-07-13 19:24:00,152 INFO L226 Difference]: Without dead ends: 262 [2021-07-13 19:24:00,153 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 239.5ms TimeCoverageRelationStatistics Valid=150, Invalid=972, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:24:00,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-07-13 19:24:00,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 202. [2021-07-13 19:24:00,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.8208955223880596) internal successors, (567), 201 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:00,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 567 transitions. [2021-07-13 19:24:00,158 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 567 transitions. Word has length 16 [2021-07-13 19:24:00,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:00,158 INFO L482 AbstractCegarLoop]: Abstraction has 202 states and 567 transitions. [2021-07-13 19:24:00,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:00,159 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 567 transitions. [2021-07-13 19:24:00,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:24:00,159 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:00,159 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:00,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:00,381 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:00,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:00,381 INFO L82 PathProgramCache]: Analyzing trace with hash 851197127, now seen corresponding path program 28 times [2021-07-13 19:24:00,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:00,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485587633] [2021-07-13 19:24:00,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:00,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:00,422 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:00,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:00,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485587633] [2021-07-13 19:24:00,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485587633] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:00,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130720789] [2021-07-13 19:24:00,423 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:00,445 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:24:00,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:00,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:24:00,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:00,503 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:00,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130720789] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:00,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:00,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-13 19:24:00,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720845010] [2021-07-13 19:24:00,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:24:00,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:00,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:24:00,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:24:00,505 INFO L87 Difference]: Start difference. First operand 202 states and 567 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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) [2021-07-13 19:24:00,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:00,604 INFO L93 Difference]: Finished difference Result 353 states and 820 transitions. [2021-07-13 19:24:00,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:24:00,605 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 16 [2021-07-13 19:24:00,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:00,607 INFO L225 Difference]: With dead ends: 353 [2021-07-13 19:24:00,607 INFO L226 Difference]: Without dead ends: 353 [2021-07-13 19:24:00,609 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 78.5ms TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:24:00,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-07-13 19:24:00,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 215. [2021-07-13 19:24:00,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.8598130841121496) internal successors, (612), 214 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:00,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 612 transitions. [2021-07-13 19:24:00,619 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 612 transitions. Word has length 16 [2021-07-13 19:24:00,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:00,619 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 612 transitions. [2021-07-13 19:24:00,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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) [2021-07-13 19:24:00,619 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 612 transitions. [2021-07-13 19:24:00,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:24:00,620 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:00,628 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:00,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:00,853 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:00,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:00,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1739430209, now seen corresponding path program 29 times [2021-07-13 19:24:00,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:00,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559349545] [2021-07-13 19:24:00,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:00,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:00,898 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:00,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:00,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559349545] [2021-07-13 19:24:00,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559349545] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:00,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617533760] [2021-07-13 19:24:00,899 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:00,923 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:24:00,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:00,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:24:00,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:00,965 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:24:00,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617533760] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:00,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:00,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-13 19:24:00,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117103420] [2021-07-13 19:24:00,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:24:00,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:00,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:24:00,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:24:00,967 INFO L87 Difference]: Start difference. First operand 215 states and 612 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-13 19:24:01,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:01,063 INFO L93 Difference]: Finished difference Result 342 states and 821 transitions. [2021-07-13 19:24:01,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:24:01,064 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 16 [2021-07-13 19:24:01,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:01,065 INFO L225 Difference]: With dead ends: 342 [2021-07-13 19:24:01,065 INFO L226 Difference]: Without dead ends: 340 [2021-07-13 19:24:01,067 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 70.2ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:24:01,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-07-13 19:24:01,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 239. [2021-07-13 19:24:01,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.911764705882353) internal successors, (693), 238 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:01,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 693 transitions. [2021-07-13 19:24:01,074 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 693 transitions. Word has length 16 [2021-07-13 19:24:01,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:01,075 INFO L482 AbstractCegarLoop]: Abstraction has 239 states and 693 transitions. [2021-07-13 19:24:01,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-13 19:24:01,075 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 693 transitions. [2021-07-13 19:24:01,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:24:01,075 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:01,076 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:01,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:01,297 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:01,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:01,297 INFO L82 PathProgramCache]: Analyzing trace with hash -160209299, now seen corresponding path program 30 times [2021-07-13 19:24:01,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:01,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611382557] [2021-07-13 19:24:01,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:01,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:01,343 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:01,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:01,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611382557] [2021-07-13 19:24:01,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611382557] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:01,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599330133] [2021-07-13 19:24:01,344 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:01,380 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:24:01,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:01,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:24:01,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:01,416 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:01,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599330133] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:01,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:01,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-13 19:24:01,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232093868] [2021-07-13 19:24:01,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:24:01,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:01,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:24:01,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:24:01,419 INFO L87 Difference]: Start difference. First operand 239 states and 693 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-13 19:24:01,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:01,461 INFO L93 Difference]: Finished difference Result 348 states and 838 transitions. [2021-07-13 19:24:01,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:24:01,462 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 16 [2021-07-13 19:24:01,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:01,463 INFO L225 Difference]: With dead ends: 348 [2021-07-13 19:24:01,463 INFO L226 Difference]: Without dead ends: 348 [2021-07-13 19:24:01,463 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 38.8ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:24:01,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-07-13 19:24:01,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 239. [2021-07-13 19:24:01,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.911764705882353) internal successors, (693), 238 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:01,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 693 transitions. [2021-07-13 19:24:01,471 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 693 transitions. Word has length 16 [2021-07-13 19:24:01,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:01,471 INFO L482 AbstractCegarLoop]: Abstraction has 239 states and 693 transitions. [2021-07-13 19:24:01,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-13 19:24:01,471 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 693 transitions. [2021-07-13 19:24:01,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:24:01,472 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:01,472 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:01,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-07-13 19:24:01,688 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:01,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:01,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1889256633, now seen corresponding path program 31 times [2021-07-13 19:24:01,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:01,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631371713] [2021-07-13 19:24:01,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:01,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:01,727 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:01,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:01,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631371713] [2021-07-13 19:24:01,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631371713] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:01,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934951248] [2021-07-13 19:24:01,727 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:01,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:01,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:24:01,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:01,796 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:01,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934951248] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:01,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:01,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-13 19:24:01,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272620611] [2021-07-13 19:24:01,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:24:01,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:01,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:24:01,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:24:01,798 INFO L87 Difference]: Start difference. First operand 239 states and 693 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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) [2021-07-13 19:24:01,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:01,869 INFO L93 Difference]: Finished difference Result 362 states and 868 transitions. [2021-07-13 19:24:01,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:24:01,869 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 16 [2021-07-13 19:24:01,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:01,871 INFO L225 Difference]: With dead ends: 362 [2021-07-13 19:24:01,871 INFO L226 Difference]: Without dead ends: 362 [2021-07-13 19:24:01,871 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 53.1ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:24:01,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-07-13 19:24:01,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 239. [2021-07-13 19:24:01,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.911764705882353) internal successors, (693), 238 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:01,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 693 transitions. [2021-07-13 19:24:01,879 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 693 transitions. Word has length 16 [2021-07-13 19:24:01,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:01,880 INFO L482 AbstractCegarLoop]: Abstraction has 239 states and 693 transitions. [2021-07-13 19:24:01,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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) [2021-07-13 19:24:01,880 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 693 transitions. [2021-07-13 19:24:01,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:24:01,880 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:01,880 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:02,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-07-13 19:24:02,097 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:02,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:02,097 INFO L82 PathProgramCache]: Analyzing trace with hash 344850861, now seen corresponding path program 32 times [2021-07-13 19:24:02,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:02,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853806578] [2021-07-13 19:24:02,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:02,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:02,140 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:02,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:02,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853806578] [2021-07-13 19:24:02,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853806578] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:02,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787001522] [2021-07-13 19:24:02,141 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:02,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:24:02,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:02,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:24:02,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:02,217 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:02,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787001522] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:02,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:02,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-13 19:24:02,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841043099] [2021-07-13 19:24:02,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:24:02,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:02,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:24:02,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:24:02,220 INFO L87 Difference]: Start difference. First operand 239 states and 693 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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) [2021-07-13 19:24:02,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:02,303 INFO L93 Difference]: Finished difference Result 346 states and 841 transitions. [2021-07-13 19:24:02,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:24:02,304 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 16 [2021-07-13 19:24:02,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:02,305 INFO L225 Difference]: With dead ends: 346 [2021-07-13 19:24:02,305 INFO L226 Difference]: Without dead ends: 346 [2021-07-13 19:24:02,305 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 63.7ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:24:02,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-07-13 19:24:02,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 239. [2021-07-13 19:24:02,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.911764705882353) internal successors, (693), 238 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:02,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 693 transitions. [2021-07-13 19:24:02,313 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 693 transitions. Word has length 16 [2021-07-13 19:24:02,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:02,313 INFO L482 AbstractCegarLoop]: Abstraction has 239 states and 693 transitions. [2021-07-13 19:24:02,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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) [2021-07-13 19:24:02,313 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 693 transitions. [2021-07-13 19:24:02,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:24:02,314 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:02,314 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:02,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-07-13 19:24:02,540 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:02,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:02,540 INFO L82 PathProgramCache]: Analyzing trace with hash 882706439, now seen corresponding path program 33 times [2021-07-13 19:24:02,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:02,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113287898] [2021-07-13 19:24:02,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:02,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:02,583 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:02,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:02,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113287898] [2021-07-13 19:24:02,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113287898] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:02,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394181966] [2021-07-13 19:24:02,584 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:02,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:24:02,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:02,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:24:02,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:02,654 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:02,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394181966] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:02,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:02,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-13 19:24:02,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041165538] [2021-07-13 19:24:02,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:24:02,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:02,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:24:02,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:24:02,656 INFO L87 Difference]: Start difference. First operand 239 states and 693 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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) [2021-07-13 19:24:02,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:02,781 INFO L93 Difference]: Finished difference Result 402 states and 976 transitions. [2021-07-13 19:24:02,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:24:02,782 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 16 [2021-07-13 19:24:02,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:02,783 INFO L225 Difference]: With dead ends: 402 [2021-07-13 19:24:02,783 INFO L226 Difference]: Without dead ends: 402 [2021-07-13 19:24:02,783 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 107.9ms TimeCoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:24:02,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-07-13 19:24:02,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 254. [2021-07-13 19:24:02,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 2.932806324110672) internal successors, (742), 253 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:02,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 742 transitions. [2021-07-13 19:24:02,791 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 742 transitions. Word has length 16 [2021-07-13 19:24:02,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:02,791 INFO L482 AbstractCegarLoop]: Abstraction has 254 states and 742 transitions. [2021-07-13 19:24:02,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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) [2021-07-13 19:24:02,791 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 742 transitions. [2021-07-13 19:24:02,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:24:02,792 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:02,792 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:03,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable180 [2021-07-13 19:24:03,009 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:03,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:03,009 INFO L82 PathProgramCache]: Analyzing trace with hash -256295271, now seen corresponding path program 34 times [2021-07-13 19:24:03,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:03,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080956332] [2021-07-13 19:24:03,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:03,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:03,055 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:03,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:03,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080956332] [2021-07-13 19:24:03,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080956332] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:03,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28139879] [2021-07-13 19:24:03,056 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:03,079 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:24:03,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:03,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:24:03,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:03,118 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:24:03,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28139879] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:03,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:03,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-13 19:24:03,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947817843] [2021-07-13 19:24:03,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:24:03,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:03,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:24:03,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:24:03,120 INFO L87 Difference]: Start difference. First operand 254 states and 742 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-13 19:24:03,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:03,210 INFO L93 Difference]: Finished difference Result 396 states and 995 transitions. [2021-07-13 19:24:03,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:24:03,210 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 16 [2021-07-13 19:24:03,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:03,212 INFO L225 Difference]: With dead ends: 396 [2021-07-13 19:24:03,212 INFO L226 Difference]: Without dead ends: 394 [2021-07-13 19:24:03,213 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 73.2ms TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:24:03,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-07-13 19:24:03,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 292. [2021-07-13 19:24:03,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 2.9828178694158076) internal successors, (868), 291 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:03,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 868 transitions. [2021-07-13 19:24:03,220 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 868 transitions. Word has length 16 [2021-07-13 19:24:03,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:03,220 INFO L482 AbstractCegarLoop]: Abstraction has 292 states and 868 transitions. [2021-07-13 19:24:03,221 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-13 19:24:03,221 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 868 transitions. [2021-07-13 19:24:03,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:24:03,222 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:03,222 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:03,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:03,445 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:03,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:03,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1322925639, now seen corresponding path program 35 times [2021-07-13 19:24:03,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:03,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094320441] [2021-07-13 19:24:03,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:03,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:03,489 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:03,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:03,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094320441] [2021-07-13 19:24:03,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094320441] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:03,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166538017] [2021-07-13 19:24:03,489 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:03,526 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:24:03,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:03,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:24:03,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:03,559 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:03,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166538017] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:03,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:03,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-13 19:24:03,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193216767] [2021-07-13 19:24:03,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:24:03,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:03,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:24:03,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:24:03,560 INFO L87 Difference]: Start difference. First operand 292 states and 868 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-13 19:24:03,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:03,601 INFO L93 Difference]: Finished difference Result 394 states and 992 transitions. [2021-07-13 19:24:03,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:24:03,602 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 16 [2021-07-13 19:24:03,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:03,605 INFO L225 Difference]: With dead ends: 394 [2021-07-13 19:24:03,605 INFO L226 Difference]: Without dead ends: 394 [2021-07-13 19:24:03,605 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 39.8ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:24:03,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-07-13 19:24:03,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 290. [2021-07-13 19:24:03,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 2.9757785467128026) internal successors, (860), 289 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:03,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 860 transitions. [2021-07-13 19:24:03,613 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 860 transitions. Word has length 16 [2021-07-13 19:24:03,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:03,613 INFO L482 AbstractCegarLoop]: Abstraction has 290 states and 860 transitions. [2021-07-13 19:24:03,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-13 19:24:03,613 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 860 transitions. [2021-07-13 19:24:03,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:24:03,614 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:03,614 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:03,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-07-13 19:24:03,829 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:03,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:03,829 INFO L82 PathProgramCache]: Analyzing trace with hash -406121695, now seen corresponding path program 36 times [2021-07-13 19:24:03,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:03,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770512232] [2021-07-13 19:24:03,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:03,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:03,873 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:03,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:03,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770512232] [2021-07-13 19:24:03,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770512232] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:03,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774807300] [2021-07-13 19:24:03,874 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:03,915 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:24:03,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:03,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:24:03,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:03,956 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:03,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774807300] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:03,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:03,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-13 19:24:03,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948228039] [2021-07-13 19:24:03,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:24:03,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:03,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:24:03,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:24:03,958 INFO L87 Difference]: Start difference. First operand 290 states and 860 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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) [2021-07-13 19:24:04,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:04,021 INFO L93 Difference]: Finished difference Result 402 states and 1006 transitions. [2021-07-13 19:24:04,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:24:04,022 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 16 [2021-07-13 19:24:04,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:04,023 INFO L225 Difference]: With dead ends: 402 [2021-07-13 19:24:04,024 INFO L226 Difference]: Without dead ends: 402 [2021-07-13 19:24:04,024 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 57.5ms TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:24:04,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-07-13 19:24:04,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 286. [2021-07-13 19:24:04,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.968421052631579) internal successors, (846), 285 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:04,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 846 transitions. [2021-07-13 19:24:04,031 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 846 transitions. Word has length 16 [2021-07-13 19:24:04,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:04,031 INFO L482 AbstractCegarLoop]: Abstraction has 286 states and 846 transitions. [2021-07-13 19:24:04,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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) [2021-07-13 19:24:04,031 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 846 transitions. [2021-07-13 19:24:04,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:24:04,032 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:04,032 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:04,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2021-07-13 19:24:04,249 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:04,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:04,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1827985799, now seen corresponding path program 37 times [2021-07-13 19:24:04,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:04,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77227463] [2021-07-13 19:24:04,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:04,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:04,292 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:04,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:04,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77227463] [2021-07-13 19:24:04,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77227463] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:04,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003488393] [2021-07-13 19:24:04,293 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:04,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:04,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:24:04,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:04,371 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:04,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003488393] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:04,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:04,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-13 19:24:04,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339544319] [2021-07-13 19:24:04,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:24:04,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:04,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:24:04,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:24:04,372 INFO L87 Difference]: Start difference. First operand 286 states and 846 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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) [2021-07-13 19:24:04,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:04,460 INFO L93 Difference]: Finished difference Result 379 states and 975 transitions. [2021-07-13 19:24:04,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:24:04,461 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 16 [2021-07-13 19:24:04,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:04,462 INFO L225 Difference]: With dead ends: 379 [2021-07-13 19:24:04,462 INFO L226 Difference]: Without dead ends: 379 [2021-07-13 19:24:04,463 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 67.2ms TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:24:04,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-07-13 19:24:04,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 286. [2021-07-13 19:24:04,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.968421052631579) internal successors, (846), 285 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:04,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 846 transitions. [2021-07-13 19:24:04,469 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 846 transitions. Word has length 16 [2021-07-13 19:24:04,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:04,470 INFO L482 AbstractCegarLoop]: Abstraction has 286 states and 846 transitions. [2021-07-13 19:24:04,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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) [2021-07-13 19:24:04,470 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 846 transitions. [2021-07-13 19:24:04,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:24:04,471 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:04,471 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:04,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:04,696 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:04,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:04,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1929125919, now seen corresponding path program 38 times [2021-07-13 19:24:04,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:04,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224652162] [2021-07-13 19:24:04,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:04,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:04,737 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:04,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:04,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224652162] [2021-07-13 19:24:04,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224652162] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:04,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309218864] [2021-07-13 19:24:04,737 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:04,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:24:04,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:04,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:24:04,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:04,803 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:04,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309218864] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:04,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:04,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-13 19:24:04,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623204893] [2021-07-13 19:24:04,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:24:04,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:04,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:24:04,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:24:04,804 INFO L87 Difference]: Start difference. First operand 286 states and 846 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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) [2021-07-13 19:24:04,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:04,907 INFO L93 Difference]: Finished difference Result 381 states and 987 transitions. [2021-07-13 19:24:04,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:24:04,907 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 16 [2021-07-13 19:24:04,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:04,909 INFO L225 Difference]: With dead ends: 381 [2021-07-13 19:24:04,909 INFO L226 Difference]: Without dead ends: 381 [2021-07-13 19:24:04,909 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 95.7ms TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:24:04,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-07-13 19:24:04,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 286. [2021-07-13 19:24:04,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.968421052631579) internal successors, (846), 285 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:04,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 846 transitions. [2021-07-13 19:24:04,916 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 846 transitions. Word has length 16 [2021-07-13 19:24:04,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:04,916 INFO L482 AbstractCegarLoop]: Abstraction has 286 states and 846 transitions. [2021-07-13 19:24:04,916 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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) [2021-07-13 19:24:04,916 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 846 transitions. [2021-07-13 19:24:04,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:24:04,917 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:04,917 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:05,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:05,133 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:05,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:05,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1859495111, now seen corresponding path program 39 times [2021-07-13 19:24:05,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:05,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949541295] [2021-07-13 19:24:05,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:05,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:05,183 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:05,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:05,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949541295] [2021-07-13 19:24:05,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949541295] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:05,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663242171] [2021-07-13 19:24:05,183 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:05,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:24:05,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:05,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:24:05,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:05,261 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:05,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663242171] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:05,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:05,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-13 19:24:05,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691485960] [2021-07-13 19:24:05,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:24:05,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:05,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:24:05,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:24:05,264 INFO L87 Difference]: Start difference. First operand 286 states and 846 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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) [2021-07-13 19:24:05,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:05,454 INFO L93 Difference]: Finished difference Result 438 states and 1131 transitions. [2021-07-13 19:24:05,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:24:05,454 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 16 [2021-07-13 19:24:05,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:05,456 INFO L225 Difference]: With dead ends: 438 [2021-07-13 19:24:05,456 INFO L226 Difference]: Without dead ends: 438 [2021-07-13 19:24:05,457 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 157.4ms TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:24:05,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-07-13 19:24:05,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 297. [2021-07-13 19:24:05,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.9695945945945947) internal successors, (879), 296 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:05,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 879 transitions. [2021-07-13 19:24:05,464 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 879 transitions. Word has length 16 [2021-07-13 19:24:05,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:05,464 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 879 transitions. [2021-07-13 19:24:05,464 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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) [2021-07-13 19:24:05,464 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 879 transitions. [2021-07-13 19:24:05,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:24:05,465 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:05,465 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:05,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:05,681 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:05,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:05,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1523752449, now seen corresponding path program 40 times [2021-07-13 19:24:05,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:05,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159645874] [2021-07-13 19:24:05,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:05,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:05,734 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:05,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:05,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159645874] [2021-07-13 19:24:05,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159645874] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:05,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597739777] [2021-07-13 19:24:05,734 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:05,759 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:24:05,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:05,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:24:05,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:05,808 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:05,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597739777] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:05,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:05,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-07-13 19:24:05,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895309812] [2021-07-13 19:24:05,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:24:05,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:05,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:24:05,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:24:05,809 INFO L87 Difference]: Start difference. First operand 297 states and 879 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:05,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:05,920 INFO L93 Difference]: Finished difference Result 446 states and 1150 transitions. [2021-07-13 19:24:05,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:24:05,921 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:24:05,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:05,923 INFO L225 Difference]: With dead ends: 446 [2021-07-13 19:24:05,923 INFO L226 Difference]: Without dead ends: 444 [2021-07-13 19:24:05,923 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 94.5ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:24:05,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-07-13 19:24:05,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 344. [2021-07-13 19:24:05,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 3.002915451895044) internal successors, (1030), 343 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:05,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1030 transitions. [2021-07-13 19:24:05,931 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1030 transitions. Word has length 16 [2021-07-13 19:24:05,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:05,931 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 1030 transitions. [2021-07-13 19:24:05,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:05,931 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1030 transitions. [2021-07-13 19:24:05,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:24:05,932 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:05,932 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:06,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:06,149 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:06,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:06,149 INFO L82 PathProgramCache]: Analyzing trace with hash 55468461, now seen corresponding path program 41 times [2021-07-13 19:24:06,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:06,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935108534] [2021-07-13 19:24:06,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:06,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:06,206 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:06,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:06,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935108534] [2021-07-13 19:24:06,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935108534] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:06,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960888985] [2021-07-13 19:24:06,206 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:06,236 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:24:06,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:06,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:24:06,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:06,290 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:24:06,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960888985] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:06,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:06,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-07-13 19:24:06,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710441414] [2021-07-13 19:24:06,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:24:06,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:06,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:24:06,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:24:06,292 INFO L87 Difference]: Start difference. First operand 344 states and 1030 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:06,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:06,371 INFO L93 Difference]: Finished difference Result 432 states and 1125 transitions. [2021-07-13 19:24:06,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:24:06,371 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:24:06,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:06,373 INFO L225 Difference]: With dead ends: 432 [2021-07-13 19:24:06,373 INFO L226 Difference]: Without dead ends: 432 [2021-07-13 19:24:06,373 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 85.7ms TimeCoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:24:06,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-07-13 19:24:06,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 342. [2021-07-13 19:24:06,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 2.9853372434017595) internal successors, (1018), 341 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:06,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1018 transitions. [2021-07-13 19:24:06,381 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1018 transitions. Word has length 16 [2021-07-13 19:24:06,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:06,381 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 1018 transitions. [2021-07-13 19:24:06,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:06,381 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1018 transitions. [2021-07-13 19:24:06,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:24:06,382 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:06,382 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:06,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:06,608 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:06,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:06,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1673578873, now seen corresponding path program 42 times [2021-07-13 19:24:06,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:06,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306200497] [2021-07-13 19:24:06,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:06,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:06,667 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:06,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:06,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306200497] [2021-07-13 19:24:06,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306200497] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:06,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609088795] [2021-07-13 19:24:06,667 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:06,698 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:24:06,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:06,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:24:06,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:06,748 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:06,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609088795] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:06,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:06,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:24:06,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678442009] [2021-07-13 19:24:06,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:24:06,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:06,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:24:06,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:24:06,749 INFO L87 Difference]: Start difference. First operand 342 states and 1018 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:06,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:06,891 INFO L93 Difference]: Finished difference Result 438 states and 1134 transitions. [2021-07-13 19:24:06,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:24:06,891 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:24:06,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:06,893 INFO L225 Difference]: With dead ends: 438 [2021-07-13 19:24:06,893 INFO L226 Difference]: Without dead ends: 438 [2021-07-13 19:24:06,893 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 119.0ms TimeCoverageRelationStatistics Valid=134, Invalid=246, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:24:06,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-07-13 19:24:06,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 338. [2021-07-13 19:24:06,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 2.979228486646884) internal successors, (1004), 337 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:06,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1004 transitions. [2021-07-13 19:24:06,901 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1004 transitions. Word has length 16 [2021-07-13 19:24:06,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:06,901 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1004 transitions. [2021-07-13 19:24:06,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:06,901 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1004 transitions. [2021-07-13 19:24:06,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:24:06,902 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:06,902 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:07,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-07-13 19:24:07,121 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:07,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:07,121 INFO L82 PathProgramCache]: Analyzing trace with hash 560528621, now seen corresponding path program 43 times [2021-07-13 19:24:07,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:07,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465975718] [2021-07-13 19:24:07,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:07,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:07,173 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:07,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:07,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465975718] [2021-07-13 19:24:07,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465975718] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:07,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709546759] [2021-07-13 19:24:07,174 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:07,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:07,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:24:07,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:07,250 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:07,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709546759] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:07,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:07,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:24:07,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976912913] [2021-07-13 19:24:07,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:24:07,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:07,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:24:07,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:24:07,251 INFO L87 Difference]: Start difference. First operand 338 states and 1004 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:07,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:07,416 INFO L93 Difference]: Finished difference Result 417 states and 1108 transitions. [2021-07-13 19:24:07,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:24:07,416 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:24:07,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:07,417 INFO L225 Difference]: With dead ends: 417 [2021-07-13 19:24:07,417 INFO L226 Difference]: Without dead ends: 417 [2021-07-13 19:24:07,418 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 145.1ms TimeCoverageRelationStatistics Valid=170, Invalid=336, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:24:07,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-07-13 19:24:07,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 332. [2021-07-13 19:24:07,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 2.972809667673716) internal successors, (984), 331 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:07,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 984 transitions. [2021-07-13 19:24:07,425 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 984 transitions. Word has length 16 [2021-07-13 19:24:07,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:07,425 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 984 transitions. [2021-07-13 19:24:07,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:07,425 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 984 transitions. [2021-07-13 19:24:07,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:24:07,426 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:07,426 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:07,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-07-13 19:24:07,645 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:07,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:07,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1098384199, now seen corresponding path program 44 times [2021-07-13 19:24:07,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:07,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760402107] [2021-07-13 19:24:07,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:07,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:07,694 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:07,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:07,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760402107] [2021-07-13 19:24:07,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760402107] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:07,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388373153] [2021-07-13 19:24:07,694 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:07,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:24:07,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:07,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:24:07,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:07,765 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:07,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388373153] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:07,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:07,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:24:07,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565040404] [2021-07-13 19:24:07,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:24:07,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:07,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:24:07,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:24:07,766 INFO L87 Difference]: Start difference. First operand 332 states and 984 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:07,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:07,933 INFO L93 Difference]: Finished difference Result 404 states and 1108 transitions. [2021-07-13 19:24:07,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:24:07,933 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:24:07,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:07,934 INFO L225 Difference]: With dead ends: 404 [2021-07-13 19:24:07,935 INFO L226 Difference]: Without dead ends: 404 [2021-07-13 19:24:07,935 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 148.8ms TimeCoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:24:07,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-07-13 19:24:07,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 325. [2021-07-13 19:24:07,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.9691358024691357) internal successors, (962), 324 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:07,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 962 transitions. [2021-07-13 19:24:07,942 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 962 transitions. Word has length 16 [2021-07-13 19:24:07,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:07,942 INFO L482 AbstractCegarLoop]: Abstraction has 325 states and 962 transitions. [2021-07-13 19:24:07,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:07,942 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 962 transitions. [2021-07-13 19:24:07,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:24:07,943 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:07,943 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:08,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:08,157 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:08,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:08,157 INFO L82 PathProgramCache]: Analyzing trace with hash 592037933, now seen corresponding path program 45 times [2021-07-13 19:24:08,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:08,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749526650] [2021-07-13 19:24:08,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:08,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:08,214 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:08,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:08,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749526650] [2021-07-13 19:24:08,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749526650] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:08,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014783478] [2021-07-13 19:24:08,215 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:08,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:24:08,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:08,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:24:08,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:08,289 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:08,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014783478] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:08,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:08,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:24:08,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871221372] [2021-07-13 19:24:08,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:24:08,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:08,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:24:08,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:24:08,290 INFO L87 Difference]: Start difference. First operand 325 states and 962 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:08,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:08,416 INFO L93 Difference]: Finished difference Result 408 states and 1118 transitions. [2021-07-13 19:24:08,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:24:08,416 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:24:08,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:08,418 INFO L225 Difference]: With dead ends: 408 [2021-07-13 19:24:08,418 INFO L226 Difference]: Without dead ends: 408 [2021-07-13 19:24:08,419 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 123.2ms TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:24:08,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-07-13 19:24:08,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 320. [2021-07-13 19:24:08,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 2.9655172413793105) internal successors, (946), 319 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:08,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 946 transitions. [2021-07-13 19:24:08,426 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 946 transitions. Word has length 16 [2021-07-13 19:24:08,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:08,426 INFO L482 AbstractCegarLoop]: Abstraction has 320 states and 946 transitions. [2021-07-13 19:24:08,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:08,426 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 946 transitions. [2021-07-13 19:24:08,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:24:08,427 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:08,428 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:08,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable192 [2021-07-13 19:24:08,641 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:08,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:08,641 INFO L82 PathProgramCache]: Analyzing trace with hash 2075172871, now seen corresponding path program 46 times [2021-07-13 19:24:08,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:08,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276509978] [2021-07-13 19:24:08,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:08,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:08,698 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:08,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:08,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276509978] [2021-07-13 19:24:08,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276509978] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:08,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986452710] [2021-07-13 19:24:08,698 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:08,731 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:24:08,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:08,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:24:08,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:08,780 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:08,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986452710] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:08,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:08,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:24:08,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993433425] [2021-07-13 19:24:08,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:24:08,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:08,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:24:08,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:24:08,782 INFO L87 Difference]: Start difference. First operand 320 states and 946 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:08,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:08,981 INFO L93 Difference]: Finished difference Result 465 states and 1276 transitions. [2021-07-13 19:24:08,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:24:08,981 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 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 16 [2021-07-13 19:24:08,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:08,983 INFO L225 Difference]: With dead ends: 465 [2021-07-13 19:24:08,983 INFO L226 Difference]: Without dead ends: 465 [2021-07-13 19:24:08,983 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 172.0ms TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:24:08,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-07-13 19:24:08,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 317. [2021-07-13 19:24:08,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 2.9936708860759493) internal successors, (946), 316 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:08,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 946 transitions. [2021-07-13 19:24:08,989 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 946 transitions. Word has length 16 [2021-07-13 19:24:08,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:08,989 INFO L482 AbstractCegarLoop]: Abstraction has 317 states and 946 transitions. [2021-07-13 19:24:08,990 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:08,990 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 946 transitions. [2021-07-13 19:24:08,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:24:08,991 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:08,991 INFO L508 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:09,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:09,195 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:09,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:09,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1607417494, now seen corresponding path program 47 times [2021-07-13 19:24:09,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:09,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137154799] [2021-07-13 19:24:09,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:09,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:09,240 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:24:09,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:09,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137154799] [2021-07-13 19:24:09,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137154799] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:09,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386910608] [2021-07-13 19:24:09,240 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:09,279 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:24:09,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:09,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:24:09,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:09,315 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:24:09,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386910608] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:09,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:09,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-07-13 19:24:09,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828922307] [2021-07-13 19:24:09,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:24:09,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:09,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:24:09,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:24:09,316 INFO L87 Difference]: Start difference. First operand 317 states and 946 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:09,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:09,385 INFO L93 Difference]: Finished difference Result 414 states and 1090 transitions. [2021-07-13 19:24:09,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:24:09,385 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:24:09,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:09,386 INFO L225 Difference]: With dead ends: 414 [2021-07-13 19:24:09,387 INFO L226 Difference]: Without dead ends: 414 [2021-07-13 19:24:09,387 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 49.1ms TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:24:09,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-07-13 19:24:09,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 323. [2021-07-13 19:24:09,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.9968944099378882) internal successors, (965), 322 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:09,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 965 transitions. [2021-07-13 19:24:09,392 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 965 transitions. Word has length 17 [2021-07-13 19:24:09,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:09,393 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 965 transitions. [2021-07-13 19:24:09,393 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:09,393 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 965 transitions. [2021-07-13 19:24:09,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:24:09,394 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:09,394 INFO L508 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:09,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:09,609 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:09,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:09,609 INFO L82 PathProgramCache]: Analyzing trace with hash 763155816, now seen corresponding path program 48 times [2021-07-13 19:24:09,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:09,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336292186] [2021-07-13 19:24:09,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:09,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:09,657 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:09,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:09,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336292186] [2021-07-13 19:24:09,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336292186] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:09,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739903700] [2021-07-13 19:24:09,658 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:09,684 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:24:09,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:09,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:24:09,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:09,710 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:24:09,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739903700] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:09,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:09,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 10 [2021-07-13 19:24:09,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852878235] [2021-07-13 19:24:09,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:24:09,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:09,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:24:09,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:24:09,711 INFO L87 Difference]: Start difference. First operand 323 states and 965 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:09,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:09,819 INFO L93 Difference]: Finished difference Result 409 states and 1079 transitions. [2021-07-13 19:24:09,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:24:09,820 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:24:09,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:09,822 INFO L225 Difference]: With dead ends: 409 [2021-07-13 19:24:09,822 INFO L226 Difference]: Without dead ends: 407 [2021-07-13 19:24:09,822 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 74.1ms TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:24:09,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-07-13 19:24:09,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 323. [2021-07-13 19:24:09,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.9906832298136647) internal successors, (963), 322 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:09,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 963 transitions. [2021-07-13 19:24:09,830 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 963 transitions. Word has length 17 [2021-07-13 19:24:09,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:09,830 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 963 transitions. [2021-07-13 19:24:09,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:09,830 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 963 transitions. [2021-07-13 19:24:09,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:24:09,831 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:09,831 INFO L508 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:10,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:10,045 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:10,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:10,045 INFO L82 PathProgramCache]: Analyzing trace with hash -2042406484, now seen corresponding path program 49 times [2021-07-13 19:24:10,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:10,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998825414] [2021-07-13 19:24:10,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:10,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:10,097 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:10,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:10,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998825414] [2021-07-13 19:24:10,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998825414] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:10,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526488266] [2021-07-13 19:24:10,098 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 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 [2021-07-13 19:24:10,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:10,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:24:10,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:10,163 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:24:10,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526488266] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:10,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:10,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-07-13 19:24:10,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451281934] [2021-07-13 19:24:10,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:24:10,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:10,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:24:10,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:24:10,164 INFO L87 Difference]: Start difference. First operand 323 states and 963 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:10,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:10,273 INFO L93 Difference]: Finished difference Result 414 states and 1084 transitions. [2021-07-13 19:24:10,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:24:10,273 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:24:10,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:10,275 INFO L225 Difference]: With dead ends: 414 [2021-07-13 19:24:10,275 INFO L226 Difference]: Without dead ends: 411 [2021-07-13 19:24:10,275 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 92.9ms TimeCoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:24:10,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-07-13 19:24:10,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 323. [2021-07-13 19:24:10,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.987577639751553) internal successors, (962), 322 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:10,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 962 transitions. [2021-07-13 19:24:10,280 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 962 transitions. Word has length 17 [2021-07-13 19:24:10,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:10,280 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 962 transitions. [2021-07-13 19:24:10,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:10,281 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 962 transitions. [2021-07-13 19:24:10,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:24:10,281 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:10,281 INFO L508 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:10,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:10,482 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:10,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:10,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1179475432, now seen corresponding path program 50 times [2021-07-13 19:24:10,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:10,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047569885] [2021-07-13 19:24:10,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:10,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:10,537 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 13 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:10,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:10,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047569885] [2021-07-13 19:24:10,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047569885] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:10,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758683292] [2021-07-13 19:24:10,537 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 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 [2021-07-13 19:24:10,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:24:10,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:10,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:24:10,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:10,614 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:24:10,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758683292] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:10,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:10,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-07-13 19:24:10,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987828338] [2021-07-13 19:24:10,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:24:10,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:10,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:24:10,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:24:10,615 INFO L87 Difference]: Start difference. First operand 323 states and 962 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:10,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:10,690 INFO L93 Difference]: Finished difference Result 367 states and 1049 transitions. [2021-07-13 19:24:10,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:24:10,690 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:24:10,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:10,691 INFO L225 Difference]: With dead ends: 367 [2021-07-13 19:24:10,691 INFO L226 Difference]: Without dead ends: 364 [2021-07-13 19:24:10,691 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 77.3ms TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:24:10,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-07-13 19:24:10,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 323. [2021-07-13 19:24:10,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.984472049689441) internal successors, (961), 322 states have internal predecessors, (961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:10,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 961 transitions. [2021-07-13 19:24:10,698 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 961 transitions. Word has length 17 [2021-07-13 19:24:10,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:10,698 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 961 transitions. [2021-07-13 19:24:10,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:10,698 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 961 transitions. [2021-07-13 19:24:10,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:24:10,699 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:10,699 INFO L508 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:10,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:10,913 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:10,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:10,913 INFO L82 PathProgramCache]: Analyzing trace with hash -2021400276, now seen corresponding path program 51 times [2021-07-13 19:24:10,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:10,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254999268] [2021-07-13 19:24:10,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:10,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:10,974 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:10,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:10,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254999268] [2021-07-13 19:24:10,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254999268] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:10,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038551558] [2021-07-13 19:24:10,974 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 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 [2021-07-13 19:24:11,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:24:11,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:11,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:24:11,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:11,048 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:11,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038551558] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:11,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:11,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-13 19:24:11,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675386858] [2021-07-13 19:24:11,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:24:11,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:11,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:24:11,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:24:11,049 INFO L87 Difference]: Start difference. First operand 323 states and 961 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:11,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:11,146 INFO L93 Difference]: Finished difference Result 355 states and 1035 transitions. [2021-07-13 19:24:11,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:24:11,147 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:24:11,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:11,148 INFO L225 Difference]: With dead ends: 355 [2021-07-13 19:24:11,148 INFO L226 Difference]: Without dead ends: 351 [2021-07-13 19:24:11,148 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 83.0ms TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:24:11,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-07-13 19:24:11,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 323. [2021-07-13 19:24:11,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.981366459627329) internal successors, (960), 322 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:11,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 960 transitions. [2021-07-13 19:24:11,154 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 960 transitions. Word has length 17 [2021-07-13 19:24:11,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:11,154 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 960 transitions. [2021-07-13 19:24:11,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:11,154 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 960 transitions. [2021-07-13 19:24:11,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:24:11,155 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:11,155 INFO L508 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:11,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:11,369 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:11,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:11,369 INFO L82 PathProgramCache]: Analyzing trace with hash 339960316, now seen corresponding path program 52 times [2021-07-13 19:24:11,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:11,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908244034] [2021-07-13 19:24:11,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:11,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:11,416 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:11,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:11,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908244034] [2021-07-13 19:24:11,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908244034] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:11,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013238981] [2021-07-13 19:24:11,416 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 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 [2021-07-13 19:24:11,441 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:24:11,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:11,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:24:11,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:11,479 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:24:11,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013238981] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:11,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:11,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-13 19:24:11,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960954015] [2021-07-13 19:24:11,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:24:11,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:11,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:24:11,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:24:11,480 INFO L87 Difference]: Start difference. First operand 323 states and 960 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-13 19:24:11,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:11,525 INFO L93 Difference]: Finished difference Result 443 states and 1153 transitions. [2021-07-13 19:24:11,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:24:11,525 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 17 [2021-07-13 19:24:11,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:11,527 INFO L225 Difference]: With dead ends: 443 [2021-07-13 19:24:11,527 INFO L226 Difference]: Without dead ends: 443 [2021-07-13 19:24:11,527 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 39.8ms TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:24:11,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-07-13 19:24:11,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 330. [2021-07-13 19:24:11,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 3.0) internal successors, (987), 329 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:11,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 987 transitions. [2021-07-13 19:24:11,532 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 987 transitions. Word has length 17 [2021-07-13 19:24:11,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:11,532 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 987 transitions. [2021-07-13 19:24:11,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-13 19:24:11,532 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 987 transitions. [2021-07-13 19:24:11,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:24:11,532 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:11,532 INFO L508 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:11,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-07-13 19:24:11,737 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:11,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:11,737 INFO L82 PathProgramCache]: Analyzing trace with hash 2080052626, now seen corresponding path program 53 times [2021-07-13 19:24:11,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:11,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121836881] [2021-07-13 19:24:11,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:11,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:11,787 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:24:11,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:11,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121836881] [2021-07-13 19:24:11,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121836881] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:11,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423433590] [2021-07-13 19:24:11,787 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 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 [2021-07-13 19:24:11,822 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:24:11,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:11,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:24:11,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:11,856 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:24:11,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423433590] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:11,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:11,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-07-13 19:24:11,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143376243] [2021-07-13 19:24:11,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:24:11,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:11,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:24:11,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:24:11,858 INFO L87 Difference]: Start difference. First operand 330 states and 987 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:11,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:11,911 INFO L93 Difference]: Finished difference Result 430 states and 1125 transitions. [2021-07-13 19:24:11,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:24:11,911 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:24:11,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:11,913 INFO L225 Difference]: With dead ends: 430 [2021-07-13 19:24:11,913 INFO L226 Difference]: Without dead ends: 430 [2021-07-13 19:24:11,913 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 47.5ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:24:11,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-07-13 19:24:11,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 329. [2021-07-13 19:24:11,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.9908536585365852) internal successors, (981), 328 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:11,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 981 transitions. [2021-07-13 19:24:11,920 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 981 transitions. Word has length 17 [2021-07-13 19:24:11,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:11,920 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 981 transitions. [2021-07-13 19:24:11,920 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:11,920 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 981 transitions. [2021-07-13 19:24:11,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:24:11,921 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:11,921 INFO L508 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:12,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-07-13 19:24:12,146 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:12,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:12,146 INFO L82 PathProgramCache]: Analyzing trace with hash -504301362, now seen corresponding path program 54 times [2021-07-13 19:24:12,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:12,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307363877] [2021-07-13 19:24:12,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:12,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:12,194 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:12,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:12,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307363877] [2021-07-13 19:24:12,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307363877] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:12,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342360927] [2021-07-13 19:24:12,195 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 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 [2021-07-13 19:24:12,220 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:24:12,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:12,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:24:12,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:12,243 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:24:12,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342360927] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:12,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:12,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 10 [2021-07-13 19:24:12,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762230213] [2021-07-13 19:24:12,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:24:12,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:12,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:24:12,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:24:12,244 INFO L87 Difference]: Start difference. First operand 329 states and 981 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:12,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:12,336 INFO L93 Difference]: Finished difference Result 428 states and 1117 transitions. [2021-07-13 19:24:12,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:24:12,336 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:24:12,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:12,338 INFO L225 Difference]: With dead ends: 428 [2021-07-13 19:24:12,338 INFO L226 Difference]: Without dead ends: 426 [2021-07-13 19:24:12,338 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 78.3ms TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:24:12,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-07-13 19:24:12,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 329. [2021-07-13 19:24:12,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.9847560975609757) internal successors, (979), 328 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:12,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 979 transitions. [2021-07-13 19:24:12,344 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 979 transitions. Word has length 17 [2021-07-13 19:24:12,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:12,344 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 979 transitions. [2021-07-13 19:24:12,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:12,344 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 979 transitions. [2021-07-13 19:24:12,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:24:12,345 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:12,345 INFO L508 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:12,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-07-13 19:24:12,561 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:12,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:12,561 INFO L82 PathProgramCache]: Analyzing trace with hash 985103634, now seen corresponding path program 55 times [2021-07-13 19:24:12,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:12,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125303866] [2021-07-13 19:24:12,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:12,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:12,611 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 13 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:12,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:12,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125303866] [2021-07-13 19:24:12,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125303866] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:12,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512364742] [2021-07-13 19:24:12,612 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 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 [2021-07-13 19:24:12,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:12,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:24:12,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:12,680 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:24:12,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512364742] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:12,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:12,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-07-13 19:24:12,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385039030] [2021-07-13 19:24:12,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:24:12,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:12,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:24:12,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:24:12,681 INFO L87 Difference]: Start difference. First operand 329 states and 979 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:12,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:12,800 INFO L93 Difference]: Finished difference Result 433 states and 1122 transitions. [2021-07-13 19:24:12,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:24:12,801 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:24:12,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:12,803 INFO L225 Difference]: With dead ends: 433 [2021-07-13 19:24:12,803 INFO L226 Difference]: Without dead ends: 430 [2021-07-13 19:24:12,803 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 96.3ms TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:24:12,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-07-13 19:24:12,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 329. [2021-07-13 19:24:12,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.981707317073171) internal successors, (978), 328 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:12,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 978 transitions. [2021-07-13 19:24:12,809 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 978 transitions. Word has length 17 [2021-07-13 19:24:12,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:12,809 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 978 transitions. [2021-07-13 19:24:12,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:12,809 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 978 transitions. [2021-07-13 19:24:12,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:24:12,810 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:12,810 INFO L508 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:13,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-07-13 19:24:13,025 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:13,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:13,025 INFO L82 PathProgramCache]: Analyzing trace with hash -87981746, now seen corresponding path program 56 times [2021-07-13 19:24:13,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:13,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124529181] [2021-07-13 19:24:13,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:13,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:13,074 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:13,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:13,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124529181] [2021-07-13 19:24:13,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124529181] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:13,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394436798] [2021-07-13 19:24:13,074 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 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 [2021-07-13 19:24:13,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:24:13,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:13,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:24:13,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:13,132 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:24:13,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394436798] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:13,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:13,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-07-13 19:24:13,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010584454] [2021-07-13 19:24:13,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:24:13,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:13,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:24:13,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:24:13,133 INFO L87 Difference]: Start difference. First operand 329 states and 978 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:13,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:13,212 INFO L93 Difference]: Finished difference Result 386 states and 1084 transitions. [2021-07-13 19:24:13,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:24:13,213 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:24:13,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:13,214 INFO L225 Difference]: With dead ends: 386 [2021-07-13 19:24:13,215 INFO L226 Difference]: Without dead ends: 383 [2021-07-13 19:24:13,215 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 79.6ms TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:24:13,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-07-13 19:24:13,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 329. [2021-07-13 19:24:13,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.9786585365853657) internal successors, (977), 328 states have internal predecessors, (977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:13,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 977 transitions. [2021-07-13 19:24:13,221 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 977 transitions. Word has length 17 [2021-07-13 19:24:13,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:13,222 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 977 transitions. [2021-07-13 19:24:13,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:13,222 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 977 transitions. [2021-07-13 19:24:13,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:24:13,223 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:13,223 INFO L508 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:13,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:13,445 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:13,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:13,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1006109842, now seen corresponding path program 57 times [2021-07-13 19:24:13,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:13,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494556454] [2021-07-13 19:24:13,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:13,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:13,494 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:13,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:13,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494556454] [2021-07-13 19:24:13,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494556454] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:13,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075046844] [2021-07-13 19:24:13,494 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 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 [2021-07-13 19:24:13,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:24:13,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:13,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:24:13,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:13,554 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:13,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075046844] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:13,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:13,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-13 19:24:13,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580564064] [2021-07-13 19:24:13,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:24:13,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:13,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:24:13,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:24:13,555 INFO L87 Difference]: Start difference. First operand 329 states and 977 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:13,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:13,634 INFO L93 Difference]: Finished difference Result 385 states and 1081 transitions. [2021-07-13 19:24:13,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:24:13,634 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:24:13,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:13,636 INFO L225 Difference]: With dead ends: 385 [2021-07-13 19:24:13,636 INFO L226 Difference]: Without dead ends: 381 [2021-07-13 19:24:13,636 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 81.1ms TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:24:13,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-07-13 19:24:13,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 329. [2021-07-13 19:24:13,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.975609756097561) internal successors, (976), 328 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:13,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 976 transitions. [2021-07-13 19:24:13,640 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 976 transitions. Word has length 17 [2021-07-13 19:24:13,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:13,641 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 976 transitions. [2021-07-13 19:24:13,641 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:13,641 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 976 transitions. [2021-07-13 19:24:13,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:24:13,641 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:13,642 INFO L508 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:13,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2021-07-13 19:24:13,847 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:13,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:13,847 INFO L82 PathProgramCache]: Analyzing trace with hash 563210702, now seen corresponding path program 58 times [2021-07-13 19:24:13,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:13,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865225322] [2021-07-13 19:24:13,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:13,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:13,900 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:13,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:13,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865225322] [2021-07-13 19:24:13,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865225322] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:13,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882293801] [2021-07-13 19:24:13,900 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 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 [2021-07-13 19:24:13,924 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:24:13,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:13,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:24:13,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:13,959 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:24:13,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882293801] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:13,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:13,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-07-13 19:24:13,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628655739] [2021-07-13 19:24:13,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:24:13,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:13,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:24:13,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:24:13,960 INFO L87 Difference]: Start difference. First operand 329 states and 976 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:14,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:14,037 INFO L93 Difference]: Finished difference Result 372 states and 1066 transitions. [2021-07-13 19:24:14,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:24:14,037 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:24:14,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:14,039 INFO L225 Difference]: With dead ends: 372 [2021-07-13 19:24:14,039 INFO L226 Difference]: Without dead ends: 367 [2021-07-13 19:24:14,039 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 86.4ms TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:24:14,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-07-13 19:24:14,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 329. [2021-07-13 19:24:14,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.972560975609756) internal successors, (975), 328 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:14,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 975 transitions. [2021-07-13 19:24:14,044 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 975 transitions. Word has length 17 [2021-07-13 19:24:14,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:14,045 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 975 transitions. [2021-07-13 19:24:14,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:14,045 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 975 transitions. [2021-07-13 19:24:14,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:24:14,045 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:14,045 INFO L508 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:14,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:14,271 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:14,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:14,271 INFO L82 PathProgramCache]: Analyzing trace with hash -296506538, now seen corresponding path program 59 times [2021-07-13 19:24:14,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:14,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749781027] [2021-07-13 19:24:14,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:14,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:14,328 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:14,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:14,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749781027] [2021-07-13 19:24:14,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749781027] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:14,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189609328] [2021-07-13 19:24:14,328 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 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 [2021-07-13 19:24:14,353 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:24:14,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:14,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:24:14,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:14,389 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:24:14,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189609328] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:14,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:14,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 12 [2021-07-13 19:24:14,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208654736] [2021-07-13 19:24:14,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:24:14,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:14,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:24:14,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:24:14,390 INFO L87 Difference]: Start difference. First operand 329 states and 975 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:14,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:14,450 INFO L93 Difference]: Finished difference Result 518 states and 1389 transitions. [2021-07-13 19:24:14,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:24:14,450 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:24:14,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:14,452 INFO L225 Difference]: With dead ends: 518 [2021-07-13 19:24:14,453 INFO L226 Difference]: Without dead ends: 518 [2021-07-13 19:24:14,453 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 59.1ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:24:14,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-07-13 19:24:14,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 384. [2021-07-13 19:24:14,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 3.0992167101827675) internal successors, (1187), 383 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:14,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1187 transitions. [2021-07-13 19:24:14,461 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1187 transitions. Word has length 17 [2021-07-13 19:24:14,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:14,461 INFO L482 AbstractCegarLoop]: Abstraction has 384 states and 1187 transitions. [2021-07-13 19:24:14,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:14,461 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1187 transitions. [2021-07-13 19:24:14,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:24:14,462 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:14,462 INFO L508 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:14,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-07-13 19:24:14,673 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:14,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:14,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1140768216, now seen corresponding path program 60 times [2021-07-13 19:24:14,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:14,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541365838] [2021-07-13 19:24:14,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:14,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:14,735 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:14,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:14,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541365838] [2021-07-13 19:24:14,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541365838] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:14,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576293834] [2021-07-13 19:24:14,735 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 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 [2021-07-13 19:24:14,759 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:24:14,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:14,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:24:14,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:14,794 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:24:14,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576293834] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:14,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:14,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-07-13 19:24:14,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141658865] [2021-07-13 19:24:14,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:24:14,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:14,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:24:14,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:24:14,796 INFO L87 Difference]: Start difference. First operand 384 states and 1187 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:14,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:14,889 INFO L93 Difference]: Finished difference Result 496 states and 1356 transitions. [2021-07-13 19:24:14,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:24:14,889 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 17 [2021-07-13 19:24:14,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:14,891 INFO L225 Difference]: With dead ends: 496 [2021-07-13 19:24:14,892 INFO L226 Difference]: Without dead ends: 494 [2021-07-13 19:24:14,892 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 81.6ms TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:24:14,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-07-13 19:24:14,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 384. [2021-07-13 19:24:14,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 3.093994778067885) internal successors, (1185), 383 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:14,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1185 transitions. [2021-07-13 19:24:14,899 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1185 transitions. Word has length 17 [2021-07-13 19:24:14,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:14,899 INFO L482 AbstractCegarLoop]: Abstraction has 384 states and 1185 transitions. [2021-07-13 19:24:14,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:14,899 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1185 transitions. [2021-07-13 19:24:14,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:24:14,900 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:14,900 INFO L508 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:15,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:15,109 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:15,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:15,109 INFO L82 PathProgramCache]: Analyzing trace with hash 348636780, now seen corresponding path program 61 times [2021-07-13 19:24:15,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:15,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434490949] [2021-07-13 19:24:15,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:15,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:15,166 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 13 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:15,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:15,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434490949] [2021-07-13 19:24:15,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434490949] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:15,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052448972] [2021-07-13 19:24:15,167 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 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 [2021-07-13 19:24:15,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:15,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:24:15,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:15,245 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 19 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:24:15,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052448972] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:15,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:15,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-07-13 19:24:15,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820145479] [2021-07-13 19:24:15,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:24:15,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:15,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:24:15,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:24:15,248 INFO L87 Difference]: Start difference. First operand 384 states and 1185 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:15,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:15,380 INFO L93 Difference]: Finished difference Result 501 states and 1361 transitions. [2021-07-13 19:24:15,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:24:15,381 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:24:15,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:15,392 INFO L225 Difference]: With dead ends: 501 [2021-07-13 19:24:15,392 INFO L226 Difference]: Without dead ends: 498 [2021-07-13 19:24:15,392 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 104.5ms TimeCoverageRelationStatistics Valid=119, Invalid=261, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:24:15,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-07-13 19:24:15,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 390. [2021-07-13 19:24:15,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 3.102827763496144) internal successors, (1207), 389 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:15,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1207 transitions. [2021-07-13 19:24:15,401 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1207 transitions. Word has length 17 [2021-07-13 19:24:15,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:15,401 INFO L482 AbstractCegarLoop]: Abstraction has 390 states and 1207 transitions. [2021-07-13 19:24:15,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:15,401 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1207 transitions. [2021-07-13 19:24:15,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:24:15,402 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:15,402 INFO L508 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:15,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:15,617 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:15,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:15,617 INFO L82 PathProgramCache]: Analyzing trace with hash -724448600, now seen corresponding path program 62 times [2021-07-13 19:24:15,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:15,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077916214] [2021-07-13 19:24:15,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:15,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:15,675 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:15,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:15,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077916214] [2021-07-13 19:24:15,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077916214] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:15,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905550657] [2021-07-13 19:24:15,676 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 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 [2021-07-13 19:24:15,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:24:15,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:15,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:24:15,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:15,748 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:24:15,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905550657] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:15,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:15,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-07-13 19:24:15,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137806924] [2021-07-13 19:24:15,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:24:15,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:15,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:24:15,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:24:15,749 INFO L87 Difference]: Start difference. First operand 390 states and 1207 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:15,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:15,861 INFO L93 Difference]: Finished difference Result 453 states and 1323 transitions. [2021-07-13 19:24:15,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:24:15,862 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:24:15,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:15,863 INFO L225 Difference]: With dead ends: 453 [2021-07-13 19:24:15,863 INFO L226 Difference]: Without dead ends: 450 [2021-07-13 19:24:15,864 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 106.1ms TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:24:15,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-07-13 19:24:15,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 390. [2021-07-13 19:24:15,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 3.1002570694087406) internal successors, (1206), 389 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:15,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1206 transitions. [2021-07-13 19:24:15,871 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1206 transitions. Word has length 17 [2021-07-13 19:24:15,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:15,872 INFO L482 AbstractCegarLoop]: Abstraction has 390 states and 1206 transitions. [2021-07-13 19:24:15,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:15,872 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1206 transitions. [2021-07-13 19:24:15,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:24:15,873 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:15,873 INFO L508 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:16,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:16,086 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:16,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:16,086 INFO L82 PathProgramCache]: Analyzing trace with hash 369642988, now seen corresponding path program 63 times [2021-07-13 19:24:16,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:16,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162487826] [2021-07-13 19:24:16,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:16,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:16,139 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:16,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:16,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162487826] [2021-07-13 19:24:16,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162487826] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:16,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474699963] [2021-07-13 19:24:16,140 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 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 [2021-07-13 19:24:16,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:24:16,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:16,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:24:16,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:16,210 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:16,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474699963] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:16,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:16,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-07-13 19:24:16,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425463464] [2021-07-13 19:24:16,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:24:16,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:16,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:24:16,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:24:16,212 INFO L87 Difference]: Start difference. First operand 390 states and 1206 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:16,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:16,310 INFO L93 Difference]: Finished difference Result 450 states and 1317 transitions. [2021-07-13 19:24:16,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:24:16,310 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 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 17 [2021-07-13 19:24:16,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:16,311 INFO L225 Difference]: With dead ends: 450 [2021-07-13 19:24:16,311 INFO L226 Difference]: Without dead ends: 446 [2021-07-13 19:24:16,311 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 97.6ms TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:24:16,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-07-13 19:24:16,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 390. [2021-07-13 19:24:16,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 3.0976863753213366) internal successors, (1205), 389 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:16,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1205 transitions. [2021-07-13 19:24:16,318 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1205 transitions. Word has length 17 [2021-07-13 19:24:16,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:16,318 INFO L482 AbstractCegarLoop]: Abstraction has 390 states and 1205 transitions. [2021-07-13 19:24:16,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:16,319 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1205 transitions. [2021-07-13 19:24:16,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:24:16,319 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:16,319 INFO L508 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:16,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-07-13 19:24:16,525 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:16,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:16,526 INFO L82 PathProgramCache]: Analyzing trace with hash -73256152, now seen corresponding path program 64 times [2021-07-13 19:24:16,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:16,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835438363] [2021-07-13 19:24:16,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:16,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:16,581 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:16,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:16,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835438363] [2021-07-13 19:24:16,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835438363] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:16,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522438731] [2021-07-13 19:24:16,582 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 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 [2021-07-13 19:24:16,610 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:24:16,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:16,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:24:16,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:16,656 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:24:16,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522438731] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:16,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:16,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-07-13 19:24:16,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618179357] [2021-07-13 19:24:16,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:24:16,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:16,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:24:16,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:24:16,658 INFO L87 Difference]: Start difference. First operand 390 states and 1205 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:16,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:16,757 INFO L93 Difference]: Finished difference Result 444 states and 1310 transitions. [2021-07-13 19:24:16,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:24:16,758 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:24:16,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:16,759 INFO L225 Difference]: With dead ends: 444 [2021-07-13 19:24:16,759 INFO L226 Difference]: Without dead ends: 439 [2021-07-13 19:24:16,759 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 109.0ms TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:24:16,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-07-13 19:24:16,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 390. [2021-07-13 19:24:16,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 3.095115681233933) internal successors, (1204), 389 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:16,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1204 transitions. [2021-07-13 19:24:16,767 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1204 transitions. Word has length 17 [2021-07-13 19:24:16,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:16,767 INFO L482 AbstractCegarLoop]: Abstraction has 390 states and 1204 transitions. [2021-07-13 19:24:16,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:16,767 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1204 transitions. [2021-07-13 19:24:16,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:24:16,768 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:16,768 INFO L508 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:16,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-07-13 19:24:16,992 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:16,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:16,992 INFO L82 PathProgramCache]: Analyzing trace with hash -918227604, now seen corresponding path program 65 times [2021-07-13 19:24:16,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:16,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500616594] [2021-07-13 19:24:16,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:16,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:17,052 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:17,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:17,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500616594] [2021-07-13 19:24:17,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500616594] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:17,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472574141] [2021-07-13 19:24:17,053 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 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 [2021-07-13 19:24:17,135 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:24:17,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:17,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:24:17,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:17,185 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:24:17,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472574141] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:17,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:17,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-07-13 19:24:17,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231111286] [2021-07-13 19:24:17,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:24:17,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:17,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:24:17,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:24:17,186 INFO L87 Difference]: Start difference. First operand 390 states and 1204 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:17,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:17,276 INFO L93 Difference]: Finished difference Result 435 states and 1298 transitions. [2021-07-13 19:24:17,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:24:17,277 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:24:17,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:17,277 INFO L225 Difference]: With dead ends: 435 [2021-07-13 19:24:17,277 INFO L226 Difference]: Without dead ends: 429 [2021-07-13 19:24:17,278 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 114.2ms TimeCoverageRelationStatistics Valid=118, Invalid=302, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:24:17,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-07-13 19:24:17,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 390. [2021-07-13 19:24:17,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 3.0925449871465296) internal successors, (1203), 389 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:17,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1203 transitions. [2021-07-13 19:24:17,283 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1203 transitions. Word has length 17 [2021-07-13 19:24:17,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:17,283 INFO L482 AbstractCegarLoop]: Abstraction has 390 states and 1203 transitions. [2021-07-13 19:24:17,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:17,283 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1203 transitions. [2021-07-13 19:24:17,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:24:17,283 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:17,283 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:17,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-07-13 19:24:17,484 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:17,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:17,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1606475449, now seen corresponding path program 66 times [2021-07-13 19:24:17,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:17,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80945888] [2021-07-13 19:24:17,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:17,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:17,597 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:24:17,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:17,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80945888] [2021-07-13 19:24:17,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80945888] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:17,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702728278] [2021-07-13 19:24:17,597 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 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 [2021-07-13 19:24:17,639 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:24:17,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:17,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:24:17,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:17,740 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:24:17,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702728278] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:17,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:17,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:24:17,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361672925] [2021-07-13 19:24:17,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:24:17,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:17,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:24:17,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:24:17,741 INFO L87 Difference]: Start difference. First operand 390 states and 1203 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:17,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:17,840 INFO L93 Difference]: Finished difference Result 721 states and 2125 transitions. [2021-07-13 19:24:17,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:24:17,840 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:24:17,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:17,842 INFO L225 Difference]: With dead ends: 721 [2021-07-13 19:24:17,842 INFO L226 Difference]: Without dead ends: 721 [2021-07-13 19:24:17,842 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 164.4ms TimeCoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:24:17,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2021-07-13 19:24:17,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 450. [2021-07-13 19:24:17,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 3.0423162583518932) internal successors, (1366), 449 states have internal predecessors, (1366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:17,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 1366 transitions. [2021-07-13 19:24:17,852 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 1366 transitions. Word has length 18 [2021-07-13 19:24:17,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:17,852 INFO L482 AbstractCegarLoop]: Abstraction has 450 states and 1366 transitions. [2021-07-13 19:24:17,852 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:17,852 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 1366 transitions. [2021-07-13 19:24:17,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:24:17,853 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:17,853 INFO L508 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:18,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-07-13 19:24:18,077 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:18,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:18,077 INFO L82 PathProgramCache]: Analyzing trace with hash 79861465, now seen corresponding path program 67 times [2021-07-13 19:24:18,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:18,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901922366] [2021-07-13 19:24:18,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:18,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:18,190 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:24:18,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:18,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901922366] [2021-07-13 19:24:18,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901922366] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:18,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114255734] [2021-07-13 19:24:18,192 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 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 [2021-07-13 19:24:18,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:18,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:24:18,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:18,338 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:24:18,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114255734] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:18,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:18,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:24:18,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640037000] [2021-07-13 19:24:18,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:24:18,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:18,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:24:18,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:24:18,340 INFO L87 Difference]: Start difference. First operand 450 states and 1366 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:18,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:18,467 INFO L93 Difference]: Finished difference Result 819 states and 2401 transitions. [2021-07-13 19:24:18,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:24:18,467 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:24:18,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:18,469 INFO L225 Difference]: With dead ends: 819 [2021-07-13 19:24:18,469 INFO L226 Difference]: Without dead ends: 819 [2021-07-13 19:24:18,469 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 179.8ms TimeCoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:24:18,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2021-07-13 19:24:18,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 531. [2021-07-13 19:24:18,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 530 states have (on average 3.0018867924528303) internal successors, (1591), 530 states have internal predecessors, (1591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:18,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 1591 transitions. [2021-07-13 19:24:18,479 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 1591 transitions. Word has length 19 [2021-07-13 19:24:18,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:18,479 INFO L482 AbstractCegarLoop]: Abstraction has 531 states and 1591 transitions. [2021-07-13 19:24:18,479 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:18,479 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 1591 transitions. [2021-07-13 19:24:18,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:24:18,480 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:18,480 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:18,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214 [2021-07-13 19:24:18,684 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:18,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:18,684 INFO L82 PathProgramCache]: Analyzing trace with hash 816698247, now seen corresponding path program 68 times [2021-07-13 19:24:18,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:18,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400114141] [2021-07-13 19:24:18,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:18,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:18,807 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:24:18,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:18,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400114141] [2021-07-13 19:24:18,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400114141] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:18,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169736805] [2021-07-13 19:24:18,807 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 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 [2021-07-13 19:24:18,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:24:18,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:18,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:24:18,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:18,970 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:24:18,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169736805] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:18,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:18,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:24:18,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378824063] [2021-07-13 19:24:18,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:24:18,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:18,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:24:18,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:24:18,971 INFO L87 Difference]: Start difference. First operand 531 states and 1591 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:19,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:19,152 INFO L93 Difference]: Finished difference Result 928 states and 2706 transitions. [2021-07-13 19:24:19,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:24:19,152 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have 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 [2021-07-13 19:24:19,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:19,154 INFO L225 Difference]: With dead ends: 928 [2021-07-13 19:24:19,154 INFO L226 Difference]: Without dead ends: 927 [2021-07-13 19:24:19,155 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 252.5ms TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:24:19,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2021-07-13 19:24:19,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 625. [2021-07-13 19:24:19,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 624 states have (on average 2.9791666666666665) internal successors, (1859), 624 states have internal predecessors, (1859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:19,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 1859 transitions. [2021-07-13 19:24:19,168 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 1859 transitions. Word has length 20 [2021-07-13 19:24:19,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:19,168 INFO L482 AbstractCegarLoop]: Abstraction has 625 states and 1859 transitions. [2021-07-13 19:24:19,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:19,168 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 1859 transitions. [2021-07-13 19:24:19,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:24:19,170 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:19,170 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:19,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:19,385 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:19,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:19,385 INFO L82 PathProgramCache]: Analyzing trace with hash -2111165287, now seen corresponding path program 69 times [2021-07-13 19:24:19,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:19,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042704843] [2021-07-13 19:24:19,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:19,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:19,463 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:19,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:19,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042704843] [2021-07-13 19:24:19,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042704843] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:19,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550026936] [2021-07-13 19:24:19,464 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 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 [2021-07-13 19:24:19,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 19:24:19,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:19,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:24:19,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:19,941 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-07-13 19:24:19,941 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:24:19,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-07-13 19:24:21,427 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 319 DAG size of output: 262 [2021-07-13 19:24:21,549 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 276 [2021-07-13 19:24:21,805 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 492 DAG size of output: 373 [2021-07-13 19:24:22,125 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 524 DAG size of output: 405 [2021-07-13 19:24:22,905 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 282 DAG size of output: 208 [2021-07-13 19:24:23,606 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 238 [2021-07-13 19:24:23,820 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 453 DAG size of output: 320 [2021-07-13 19:24:24,334 WARN L205 SmtUtils]: Spent 511.00 ms on a formula simplification. DAG size of input: 831 DAG size of output: 549 [2021-07-13 19:24:24,848 WARN L205 SmtUtils]: Spent 510.00 ms on a formula simplification. DAG size of input: 831 DAG size of output: 549 [2021-07-13 19:24:25,456 WARN L205 SmtUtils]: Spent 605.00 ms on a formula simplification. DAG size of input: 846 DAG size of output: 564 [2021-07-13 19:24:26,456 WARN L205 SmtUtils]: Spent 986.00 ms on a formula simplification. DAG size of input: 566 DAG size of output: 640 [2021-07-13 19:24:26,910 WARN L205 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 358 DAG size of output: 490 [2021-07-13 19:24:27,578 WARN L205 SmtUtils]: Spent 663.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 448 [2021-07-13 19:24:27,753 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 234 DAG size of output: 285 [2021-07-13 19:24:27,944 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 281 [2021-07-13 19:24:28,089 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 236 [2021-07-13 19:24:29,126 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 322 DAG size of output: 278 [2021-07-13 19:24:29,286 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 284 [2021-07-13 19:24:29,566 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 383 DAG size of output: 334 [2021-07-13 19:24:30,455 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 272 [2021-07-13 19:24:30,873 WARN L205 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 590 DAG size of output: 493 [2021-07-13 19:24:31,399 WARN L205 SmtUtils]: Spent 522.00 ms on a formula simplification. DAG size of input: 661 DAG size of output: 526 [2021-07-13 19:24:31,614 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 267 [2021-07-13 19:24:31,780 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 280 [2021-07-13 19:24:31,966 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 226 [2021-07-13 19:24:32,802 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 227 [2021-07-13 19:24:32,986 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 289 DAG size of output: 280 [2021-07-13 19:24:33,561 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 180 [2021-07-13 19:24:34,429 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 355 DAG size of output: 302 [2021-07-13 19:24:34,883 WARN L205 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 507 DAG size of output: 455 [2021-07-13 19:24:35,505 WARN L205 SmtUtils]: Spent 619.00 ms on a formula simplification. DAG size of input: 608 DAG size of output: 539 [2021-07-13 19:24:36,773 WARN L205 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 1029 DAG size of output: 839 [2021-07-13 19:24:36,915 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 247 [2021-07-13 19:24:37,061 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 248 [2021-07-13 19:24:38,358 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 277 [2021-07-13 19:24:38,526 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 286 [2021-07-13 19:24:38,813 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 485 DAG size of output: 404 [2021-07-13 19:24:39,716 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 271 DAG size of output: 242 [2021-07-13 19:24:41,052 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 285 [2021-07-13 19:24:41,311 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 369 DAG size of output: 331 [2021-07-13 19:24:41,801 WARN L205 SmtUtils]: Spent 487.00 ms on a formula simplification. DAG size of input: 490 DAG size of output: 435 [2021-07-13 19:24:42,587 WARN L205 SmtUtils]: Spent 782.00 ms on a formula simplification. DAG size of input: 776 DAG size of output: 642 [2021-07-13 19:24:43,543 WARN L205 SmtUtils]: Spent 952.00 ms on a formula simplification. DAG size of input: 842 DAG size of output: 701 [2021-07-13 19:24:45,690 WARN L205 SmtUtils]: Spent 2.14 s on a formula simplification. DAG size of input: 1449 DAG size of output: 1159 [2021-07-13 19:24:45,804 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 276 [2021-07-13 19:24:46,011 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 234 DAG size of output: 282 [2021-07-13 19:24:46,170 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 237 [2021-07-13 19:24:47,653 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 235 [2021-07-13 19:24:47,857 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 398 DAG size of output: 336 [2021-07-13 19:24:48,092 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 453 DAG size of output: 386 [2021-07-13 19:24:48,451 WARN L205 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 534 DAG size of output: 432 [2021-07-13 19:24:48,903 WARN L205 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 561 DAG size of output: 457 [2021-07-13 19:24:49,434 WARN L205 SmtUtils]: Spent 528.00 ms on a formula simplification. DAG size of input: 627 DAG size of output: 493 [2021-07-13 19:24:49,629 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 245 [2021-07-13 19:24:51,244 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 312 DAG size of output: 282 [2021-07-13 19:24:51,460 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 319 DAG size of output: 290 [2021-07-13 19:24:51,782 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 448 DAG size of output: 384 [2021-07-13 19:24:52,254 WARN L205 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 537 DAG size of output: 459 [2021-07-13 19:24:52,986 WARN L205 SmtUtils]: Spent 675.00 ms on a formula simplification. DAG size of input: 565 DAG size of output: 485 [2021-07-13 19:24:54,157 WARN L205 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 963 DAG size of output: 759 [2021-07-13 19:24:55,394 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 235 [2021-07-13 19:24:55,539 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 298 DAG size of output: 267 [2021-07-13 19:24:55,751 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 418 DAG size of output: 342 [2021-07-13 19:24:56,023 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 438 DAG size of output: 364 [2021-07-13 19:24:57,215 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 373 DAG size of output: 309 [2021-07-13 19:24:57,929 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 247 [2021-07-13 19:24:58,091 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 310 DAG size of output: 289 [2021-07-13 19:24:58,429 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 536 DAG size of output: 460 [2021-07-13 19:24:58,842 WARN L205 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 545 DAG size of output: 471 [2021-07-13 19:24:59,350 WARN L205 SmtUtils]: Spent 505.00 ms on a formula simplification. DAG size of input: 593 DAG size of output: 517 [2021-07-13 19:25:00,311 WARN L205 SmtUtils]: Spent 957.00 ms on a formula simplification. DAG size of input: 881 DAG size of output: 770 [2021-07-13 19:25:01,646 WARN L205 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 976 DAG size of output: 843 [2021-07-13 19:25:04,022 WARN L205 SmtUtils]: Spent 2.37 s on a formula simplification. DAG size of input: 1672 DAG size of output: 1269 [2021-07-13 19:25:09,046 WARN L205 SmtUtils]: Spent 5.02 s on a formula simplification. DAG size of input: 2766 DAG size of output: 2078 [2021-07-13 19:25:14,947 WARN L205 SmtUtils]: Spent 5.89 s on a formula simplification. DAG size of input: 2914 DAG size of output: 2167 [2021-07-13 19:25:21,573 WARN L205 SmtUtils]: Spent 6.61 s on a formula simplification. DAG size of input: 3096 DAG size of output: 2337 [2021-07-13 19:25:29,221 WARN L205 SmtUtils]: Spent 7.63 s on a formula simplification. DAG size of input: 3384 DAG size of output: 2564 [2021-07-13 19:25:36,776 WARN L205 SmtUtils]: Spent 7.54 s on a formula simplification. DAG size of input: 3384 DAG size of output: 2564 [2021-07-13 19:25:45,482 WARN L205 SmtUtils]: Spent 8.69 s on a formula simplification. DAG size of input: 3395 DAG size of output: 2575 [2021-07-13 19:25:45,823 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification that was a NOOP. DAG size: 2571 [2021-07-13 19:25:53,401 WARN L205 SmtUtils]: Spent 7.57 s on a formula simplification. DAG size of input: 2573 DAG size of output: 2793 [2021-07-13 19:25:57,310 WARN L205 SmtUtils]: Spent 3.89 s on a formula simplification. DAG size of input: 1761 DAG size of output: 2006 [2021-07-13 19:26:00,779 WARN L205 SmtUtils]: Spent 3.46 s on a formula simplification. DAG size of input: 1624 DAG size of output: 1786 [2021-07-13 19:26:00,989 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 1123 [2021-07-13 19:26:01,166 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 1071 DAG size of output: 1071 [2021-07-13 19:26:01,905 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 380 DAG size of output: 266 [2021-07-13 19:26:02,452 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 228 [2021-07-13 19:26:03,298 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 750 DAG size of output: 510 [2021-07-13 19:26:03,965 WARN L205 SmtUtils]: Spent 663.00 ms on a formula simplification. DAG size of input: 1180 DAG size of output: 813 [2021-07-13 19:26:04,848 WARN L205 SmtUtils]: Spent 823.00 ms on a formula simplification. DAG size of input: 1214 DAG size of output: 842 [2021-07-13 19:26:05,843 WARN L205 SmtUtils]: Spent 962.00 ms on a formula simplification. DAG size of input: 1258 DAG size of output: 879 [2021-07-13 19:26:07,175 WARN L205 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 1418 DAG size of output: 990 [2021-07-13 19:26:08,032 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 683 DAG size of output: 683 [2021-07-13 19:26:08,632 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 240 [2021-07-13 19:26:09,268 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 209 [2021-07-13 19:26:09,833 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 262 DAG size of output: 210 [2021-07-13 19:26:10,099 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 597 DAG size of output: 365 [2021-07-13 19:26:10,456 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 814 DAG size of output: 480 [2021-07-13 19:26:10,947 WARN L205 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 840 DAG size of output: 500 [2021-07-13 19:26:11,508 WARN L205 SmtUtils]: Spent 556.00 ms on a formula simplification. DAG size of input: 937 DAG size of output: 538 [2021-07-13 19:26:12,094 WARN L205 SmtUtils]: Spent 582.00 ms on a formula simplification. DAG size of input: 1090 DAG size of output: 589 [2021-07-13 19:26:13,795 WARN L205 SmtUtils]: Spent 1.70 s on a formula simplification. DAG size of input: 2240 DAG size of output: 1268 [2021-07-13 19:26:15,536 WARN L205 SmtUtils]: Spent 1.73 s on a formula simplification. DAG size of input: 914 DAG size of output: 944 [2021-07-13 19:26:16,329 WARN L205 SmtUtils]: Spent 605.00 ms on a formula simplification. DAG size of input: 453 DAG size of output: 487 [2021-07-13 19:26:17,431 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 431 DAG size of output: 252 [2021-07-13 19:26:17,603 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 445 DAG size of output: 261 [2021-07-13 19:26:17,896 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 483 DAG size of output: 290 [2021-07-13 19:26:18,824 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 251 [2021-07-13 19:26:19,013 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 266 [2021-07-13 19:26:19,353 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 300 [2021-07-13 19:26:19,821 WARN L205 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 704 DAG size of output: 419 [2021-07-13 19:26:20,302 WARN L205 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 756 DAG size of output: 464 [2021-07-13 19:26:20,407 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 635 DAG size of output: 635 [2021-07-13 19:26:20,748 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 520 DAG size of output: 520 [2021-07-13 19:26:20,951 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 316 [2021-07-13 19:26:21,951 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 425 DAG size of output: 277 [2021-07-13 19:26:23,036 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 684 DAG size of output: 452 [2021-07-13 19:26:23,439 WARN L205 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 697 DAG size of output: 464 [2021-07-13 19:26:23,921 WARN L205 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 725 DAG size of output: 492 [2021-07-13 19:26:24,431 WARN L205 SmtUtils]: Spent 506.00 ms on a formula simplification. DAG size of input: 761 DAG size of output: 529 [2021-07-13 19:26:25,263 WARN L205 SmtUtils]: Spent 828.00 ms on a formula simplification. DAG size of input: 1332 DAG size of output: 697 [2021-07-13 19:26:27,846 WARN L205 SmtUtils]: Spent 2.57 s on a formula simplification. DAG size of input: 3118 DAG size of output: 1567 [2021-07-13 19:26:30,665 WARN L205 SmtUtils]: Spent 2.81 s on a formula simplification. DAG size of input: 1218 DAG size of output: 1431 [2021-07-13 19:26:30,852 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 1087 DAG size of output: 1087 [2021-07-13 19:26:31,222 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 964 DAG size of output: 964 [2021-07-13 19:26:32,464 WARN L205 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 896 DAG size of output: 992 [2021-07-13 19:26:33,014 WARN L205 SmtUtils]: Spent 544.00 ms on a formula simplification. DAG size of input: 688 DAG size of output: 624 [2021-07-13 19:26:33,531 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 273 [2021-07-13 19:26:33,766 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 413 DAG size of output: 322 [2021-07-13 19:26:34,320 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 254 [2021-07-13 19:26:34,496 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 401 DAG size of output: 282 [2021-07-13 19:26:34,934 WARN L205 SmtUtils]: Spent 435.00 ms on a formula simplification. DAG size of input: 651 DAG size of output: 457 [2021-07-13 19:26:35,558 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 262 DAG size of output: 169 [2021-07-13 19:26:35,691 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 465 DAG size of output: 243 [2021-07-13 19:26:35,958 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 510 DAG size of output: 285 [2021-07-13 19:26:36,602 WARN L205 SmtUtils]: Spent 641.00 ms on a formula simplification. DAG size of input: 1004 DAG size of output: 531 [2021-07-13 19:26:37,630 WARN L205 SmtUtils]: Spent 820.00 ms on a formula simplification. DAG size of input: 1110 DAG size of output: 573 [2021-07-13 19:26:38,524 WARN L205 SmtUtils]: Spent 888.00 ms on a formula simplification. DAG size of input: 1254 DAG size of output: 662 [2021-07-13 19:26:39,636 WARN L205 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 656 DAG size of output: 696 [2021-07-13 19:26:39,974 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 231 [2021-07-13 19:26:40,482 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 186 [2021-07-13 19:26:41,110 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 396 DAG size of output: 216 [2021-07-13 19:26:41,322 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 415 DAG size of output: 230 [2021-07-13 19:26:41,612 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 461 DAG size of output: 257 [2021-07-13 19:26:41,874 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 505 DAG size of output: 276 [2021-07-13 19:26:42,179 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 385 DAG size of output: 360 [2021-07-13 19:26:42,410 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 306 [2021-07-13 19:26:43,332 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 181 [2021-07-13 19:26:43,659 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 378 [2021-07-13 19:26:44,790 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 191 [2021-07-13 19:26:45,037 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 519 DAG size of output: 205 [2021-07-13 19:26:45,468 WARN L205 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 860 DAG size of output: 304 [2021-07-13 19:26:47,033 WARN L205 SmtUtils]: Spent 1.56 s on a formula simplification. DAG size of input: 1932 DAG size of output: 829 [2021-07-13 19:26:51,501 WARN L205 SmtUtils]: Spent 4.46 s on a formula simplification. DAG size of input: 4820 DAG size of output: 2203 [2021-07-13 19:26:56,014 WARN L205 SmtUtils]: Spent 4.49 s on a formula simplification. DAG size of input: 4820 DAG size of output: 2203 [2021-07-13 19:27:02,360 WARN L205 SmtUtils]: Spent 6.32 s on a formula simplification. DAG size of input: 4827 DAG size of output: 2446 [2021-07-13 19:27:02,901 WARN L205 SmtUtils]: Spent 531.00 ms on a formula simplification. DAG size of input: 1002 DAG size of output: 701 [2021-07-13 19:27:03,727 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 782 DAG size of output: 366 [2021-07-13 19:27:05,933 WARN L205 SmtUtils]: Spent 2.19 s on a formula simplification. DAG size of input: 1696 DAG size of output: 1306 [2021-07-13 19:27:06,388 WARN L205 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 1066 DAG size of output: 847 [2021-07-13 19:27:07,426 WARN L205 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 980 DAG size of output: 437 [2021-07-13 19:27:07,678 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 355 DAG size of output: 328 [2021-07-13 19:27:07,962 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 167 [2021-07-13 19:27:08,444 WARN L205 SmtUtils]: Spent 478.00 ms on a formula simplification. DAG size of input: 1153 DAG size of output: 527 [2021-07-13 19:27:09,338 WARN L205 SmtUtils]: Spent 889.00 ms on a formula simplification. DAG size of input: 1785 DAG size of output: 773 [2021-07-13 19:27:10,256 WARN L205 SmtUtils]: Spent 910.00 ms on a formula simplification. DAG size of input: 1785 DAG size of output: 773 [2021-07-13 19:27:11,249 WARN L205 SmtUtils]: Spent 987.00 ms on a formula simplification. DAG size of input: 1790 DAG size of output: 775 [2021-07-13 19:27:11,898 WARN L205 SmtUtils]: Spent 585.00 ms on a formula simplification. DAG size of input: 775 DAG size of output: 780 [2021-07-13 19:27:13,079 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 450 DAG size of output: 281 [2021-07-13 19:27:13,249 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 541 DAG size of output: 324 [2021-07-13 19:27:13,437 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 541 DAG size of output: 324 [2021-07-13 19:27:13,650 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 545 DAG size of output: 249 [2021-07-13 19:27:13,987 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:27:13,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:27:13,989 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:27:13,990 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-07-13 19:27:13,994 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:13,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550026936] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:13,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:13,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-07-13 19:27:13,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784805482] [2021-07-13 19:27:13,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:27:13,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:13,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:27:13,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:27:13,995 INFO L87 Difference]: Start difference. First operand 625 states and 1859 transitions. Second operand has 25 states, 25 states have (on average 1.52) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:14,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:14,324 INFO L93 Difference]: Finished difference Result 848 states and 2360 transitions. [2021-07-13 19:27:14,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:27:14,325 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 24 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 21 [2021-07-13 19:27:14,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:14,327 INFO L225 Difference]: With dead ends: 848 [2021-07-13 19:27:14,327 INFO L226 Difference]: Without dead ends: 845 [2021-07-13 19:27:14,327 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 245.8ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:27:14,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2021-07-13 19:27:14,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 721. [2021-07-13 19:27:14,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 720 states have (on average 3.0319444444444446) internal successors, (2183), 720 states have internal predecessors, (2183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:14,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 2183 transitions. [2021-07-13 19:27:14,339 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 2183 transitions. Word has length 21 [2021-07-13 19:27:14,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:14,340 INFO L482 AbstractCegarLoop]: Abstraction has 721 states and 2183 transitions. [2021-07-13 19:27:14,340 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:14,340 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 2183 transitions. [2021-07-13 19:27:14,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:27:14,341 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:14,342 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:14,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2021-07-13 19:27:14,563 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:14,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:14,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1684323737, now seen corresponding path program 70 times [2021-07-13 19:27:14,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:14,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016045338] [2021-07-13 19:27:14,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:14,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:14,652 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:27:14,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:14,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016045338] [2021-07-13 19:27:14,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016045338] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:14,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852845852] [2021-07-13 19:27:14,652 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 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 [2021-07-13 19:27:14,684 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:27:14,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:27:14,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:27:14,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:15,115 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-07-13 19:27:15,115 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:27:15,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-07-13 19:27:16,186 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 544 DAG size of output: 448 [2021-07-13 19:27:16,432 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 550 DAG size of output: 454 [2021-07-13 19:27:17,486 WARN L205 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 802 DAG size of output: 610 [2021-07-13 19:27:17,955 WARN L205 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 825 DAG size of output: 622 [2021-07-13 19:27:18,504 WARN L205 SmtUtils]: Spent 544.00 ms on a formula simplification. DAG size of input: 847 DAG size of output: 645 [2021-07-13 19:27:19,059 WARN L205 SmtUtils]: Spent 551.00 ms on a formula simplification. DAG size of input: 847 DAG size of output: 645 [2021-07-13 19:27:19,678 WARN L205 SmtUtils]: Spent 616.00 ms on a formula simplification. DAG size of input: 858 DAG size of output: 656 [2021-07-13 19:27:20,375 WARN L205 SmtUtils]: Spent 692.00 ms on a formula simplification. DAG size of input: 658 DAG size of output: 764 [2021-07-13 19:27:20,857 WARN L205 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 647 DAG size of output: 646 [2021-07-13 19:27:21,323 WARN L205 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 643 DAG size of output: 656 [2021-07-13 19:27:21,517 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 616 DAG size of output: 404 [2021-07-13 19:27:22,542 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 411 DAG size of output: 255 [2021-07-13 19:27:23,054 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 586 DAG size of output: 344 [2021-07-13 19:27:23,284 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 624 DAG size of output: 379 [2021-07-13 19:27:23,570 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 639 DAG size of output: 396 [2021-07-13 19:27:23,971 WARN L205 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 806 DAG size of output: 485 [2021-07-13 19:27:24,367 WARN L205 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 806 DAG size of output: 485 [2021-07-13 19:27:24,929 WARN L205 SmtUtils]: Spent 559.00 ms on a formula simplification. DAG size of input: 812 DAG size of output: 491 [2021-07-13 19:27:25,441 WARN L205 SmtUtils]: Spent 507.00 ms on a formula simplification. DAG size of input: 493 DAG size of output: 525 [2021-07-13 19:27:25,761 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 374 DAG size of output: 405 [2021-07-13 19:27:25,884 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 238 [2021-07-13 19:27:26,417 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 307 DAG size of output: 356 [2021-07-13 19:27:26,765 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 310 [2021-07-13 19:27:27,345 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 306 DAG size of output: 236 [2021-07-13 19:27:27,545 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 398 DAG size of output: 302 [2021-07-13 19:27:27,807 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 312 DAG size of output: 401 [2021-07-13 19:27:27,982 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 276 DAG size of output: 316 [2021-07-13 19:27:28,326 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 214 [2021-07-13 19:27:28,766 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 249 DAG size of output: 275 [2021-07-13 19:27:29,316 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 423 DAG size of output: 267 [2021-07-13 19:27:29,678 WARN L205 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 703 DAG size of output: 471 [2021-07-13 19:27:30,025 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 703 DAG size of output: 471 [2021-07-13 19:27:30,427 WARN L205 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 706 DAG size of output: 474 [2021-07-13 19:27:30,781 WARN L205 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 476 DAG size of output: 527 [2021-07-13 19:27:31,293 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 160 [2021-07-13 19:27:32,096 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 439 DAG size of output: 283 [2021-07-13 19:27:32,311 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 529 DAG size of output: 314 [2021-07-13 19:27:32,510 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 529 DAG size of output: 314 [2021-07-13 19:27:32,741 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 533 DAG size of output: 320 [2021-07-13 19:27:32,949 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 322 DAG size of output: 367 [2021-07-13 19:27:33,442 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 234 DAG size of output: 308 [2021-07-13 19:27:34,099 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 458 DAG size of output: 274 [2021-07-13 19:27:34,245 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 458 DAG size of output: 274 [2021-07-13 19:27:34,419 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 460 DAG size of output: 276 [2021-07-13 19:27:34,705 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:27:34,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:27:34,706 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:27:34,707 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-07-13 19:27:34,712 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:34,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852845852] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:34,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:34,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-07-13 19:27:34,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176940461] [2021-07-13 19:27:34,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:27:34,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:34,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:27:34,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:27:34,713 INFO L87 Difference]: Start difference. First operand 721 states and 2183 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:34,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:34,938 INFO L93 Difference]: Finished difference Result 961 states and 2736 transitions. [2021-07-13 19:27:34,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:27:34,939 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:27:34,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:34,941 INFO L225 Difference]: With dead ends: 961 [2021-07-13 19:27:34,941 INFO L226 Difference]: Without dead ends: 958 [2021-07-13 19:27:34,942 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 244.5ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:27:34,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2021-07-13 19:27:34,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 809. [2021-07-13 19:27:34,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 809 states, 808 states have (on average 3.1014851485148514) internal successors, (2506), 808 states have internal predecessors, (2506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:34,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 2506 transitions. [2021-07-13 19:27:34,954 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 2506 transitions. Word has length 21 [2021-07-13 19:27:34,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:34,954 INFO L482 AbstractCegarLoop]: Abstraction has 809 states and 2506 transitions. [2021-07-13 19:27:34,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:34,954 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 2506 transitions. [2021-07-13 19:27:34,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:27:34,955 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:34,955 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:35,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5383 [2021-07-13 19:27:35,157 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:35,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:35,157 INFO L82 PathProgramCache]: Analyzing trace with hash 161319513, now seen corresponding path program 71 times [2021-07-13 19:27:35,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:35,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530457823] [2021-07-13 19:27:35,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:35,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:35,237 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:27:35,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:35,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530457823] [2021-07-13 19:27:35,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530457823] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:35,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499775715] [2021-07-13 19:27:35,238 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 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 [2021-07-13 19:27:35,274 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:27:35,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:27:35,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:27:35,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:35,677 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-07-13 19:27:35,678 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:27:35,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-07-13 19:27:36,363 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 316 DAG size of output: 247 [2021-07-13 19:27:36,514 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 267 [2021-07-13 19:27:36,668 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 281 [2021-07-13 19:27:37,349 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 241 [2021-07-13 19:27:37,477 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 256 [2021-07-13 19:27:37,803 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 532 DAG size of output: 405 [2021-07-13 19:27:38,125 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 532 DAG size of output: 405 [2021-07-13 19:27:38,495 WARN L205 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 547 DAG size of output: 420 [2021-07-13 19:27:39,026 WARN L205 SmtUtils]: Spent 507.00 ms on a formula simplification. DAG size of input: 416 DAG size of output: 522 [2021-07-13 19:27:39,239 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 265 DAG size of output: 274 [2021-07-13 19:27:39,390 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 312 [2021-07-13 19:27:39,498 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 237 [2021-07-13 19:27:40,106 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 306 DAG size of output: 260 [2021-07-13 19:27:41,217 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 312 DAG size of output: 268 [2021-07-13 19:27:41,471 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 524 DAG size of output: 420 [2021-07-13 19:27:41,807 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 536 DAG size of output: 416 [2021-07-13 19:27:42,869 WARN L205 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 654 DAG size of output: 452 [2021-07-13 19:27:43,389 WARN L205 SmtUtils]: Spent 515.00 ms on a formula simplification. DAG size of input: 712 DAG size of output: 504 [2021-07-13 19:27:43,636 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 307 DAG size of output: 318 [2021-07-13 19:27:44,612 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 338 DAG size of output: 251 [2021-07-13 19:27:44,789 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 382 DAG size of output: 286 [2021-07-13 19:27:45,684 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 518 DAG size of output: 315 [2021-07-13 19:27:46,465 WARN L205 SmtUtils]: Spent 777.00 ms on a formula simplification. DAG size of input: 1072 DAG size of output: 665 [2021-07-13 19:27:47,236 WARN L205 SmtUtils]: Spent 765.00 ms on a formula simplification. DAG size of input: 1072 DAG size of output: 665 [2021-07-13 19:27:48,328 WARN L205 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 1080 DAG size of output: 713 [2021-07-13 19:27:48,860 WARN L205 SmtUtils]: Spent 526.00 ms on a formula simplification. DAG size of input: 560 DAG size of output: 636 [2021-07-13 19:27:49,301 WARN L205 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 483 DAG size of output: 563 [2021-07-13 19:27:49,451 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 428 DAG size of output: 282 [2021-07-13 19:27:49,576 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 271 [2021-07-13 19:27:50,028 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 381 DAG size of output: 257 [2021-07-13 19:27:50,245 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 294 DAG size of output: 334 [2021-07-13 19:27:50,786 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 480 DAG size of output: 325 [2021-07-13 19:27:50,948 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 274 [2021-07-13 19:27:51,094 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 223 DAG size of output: 271 [2021-07-13 19:27:51,963 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 600 DAG size of output: 357 [2021-07-13 19:27:52,247 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 600 DAG size of output: 357 [2021-07-13 19:27:52,545 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 606 DAG size of output: 365 [2021-07-13 19:27:52,859 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 284 [2021-07-13 19:27:53,000 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 218 [2021-07-13 19:27:53,581 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 245 [2021-07-13 19:27:53,695 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 245 [2021-07-13 19:27:53,823 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 250 [2021-07-13 19:27:54,394 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:27:54,395 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:27:54,395 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:27:54,395 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-07-13 19:27:54,401 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:54,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499775715] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:54,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:54,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-07-13 19:27:54,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504057219] [2021-07-13 19:27:54,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:27:54,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:54,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:27:54,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:27:54,402 INFO L87 Difference]: Start difference. First operand 809 states and 2506 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:54,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:54,687 INFO L93 Difference]: Finished difference Result 1077 states and 3152 transitions. [2021-07-13 19:27:54,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:27:54,688 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:27:54,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:54,690 INFO L225 Difference]: With dead ends: 1077 [2021-07-13 19:27:54,690 INFO L226 Difference]: Without dead ends: 1074 [2021-07-13 19:27:54,690 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 250.6ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:27:54,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1074 states. [2021-07-13 19:27:54,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1074 to 915. [2021-07-13 19:27:54,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 915 states, 914 states have (on average 3.1783369803063457) internal successors, (2905), 914 states have internal predecessors, (2905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:54,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 915 states to 915 states and 2905 transitions. [2021-07-13 19:27:54,704 INFO L78 Accepts]: Start accepts. Automaton has 915 states and 2905 transitions. Word has length 21 [2021-07-13 19:27:54,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:54,704 INFO L482 AbstractCegarLoop]: Abstraction has 915 states and 2905 transitions. [2021-07-13 19:27:54,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:54,704 INFO L276 IsEmpty]: Start isEmpty. Operand 915 states and 2905 transitions. [2021-07-13 19:27:54,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:27:54,706 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:54,706 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:54,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6461 [2021-07-13 19:27:54,907 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:54,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:54,907 INFO L82 PathProgramCache]: Analyzing trace with hash 192828825, now seen corresponding path program 72 times [2021-07-13 19:27:54,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:54,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445595365] [2021-07-13 19:27:54,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:54,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:54,982 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:27:54,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:54,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445595365] [2021-07-13 19:27:54,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445595365] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:54,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72973112] [2021-07-13 19:27:54,982 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 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 [2021-07-13 19:27:55,010 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 19:27:55,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:27:55,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:27:55,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:55,407 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-07-13 19:27:55,408 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:27:55,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-07-13 19:27:56,416 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 473 DAG size of output: 410 [2021-07-13 19:27:57,133 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 705 DAG size of output: 571 [2021-07-13 19:27:57,928 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 319 [2021-07-13 19:27:58,111 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 486 DAG size of output: 388 [2021-07-13 19:27:58,700 WARN L205 SmtUtils]: Spent 586.00 ms on a formula simplification. DAG size of input: 1080 DAG size of output: 847 [2021-07-13 19:27:59,394 WARN L205 SmtUtils]: Spent 687.00 ms on a formula simplification. DAG size of input: 1097 DAG size of output: 862 [2021-07-13 19:28:00,177 WARN L205 SmtUtils]: Spent 776.00 ms on a formula simplification. DAG size of input: 1119 DAG size of output: 870 [2021-07-13 19:28:00,955 WARN L205 SmtUtils]: Spent 773.00 ms on a formula simplification. DAG size of input: 1119 DAG size of output: 870 [2021-07-13 19:28:01,868 WARN L205 SmtUtils]: Spent 909.00 ms on a formula simplification. DAG size of input: 1136 DAG size of output: 887 [2021-07-13 19:28:02,573 WARN L205 SmtUtils]: Spent 655.00 ms on a formula simplification. DAG size of input: 883 DAG size of output: 931 [2021-07-13 19:28:02,944 WARN L205 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 876 DAG size of output: 419 [2021-07-13 19:28:03,545 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 389 DAG size of output: 498 [2021-07-13 19:28:04,699 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 414 DAG size of output: 264 [2021-07-13 19:28:04,964 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 583 DAG size of output: 439 [2021-07-13 19:28:05,339 WARN L205 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 705 DAG size of output: 525 [2021-07-13 19:28:05,860 WARN L205 SmtUtils]: Spent 517.00 ms on a formula simplification. DAG size of input: 778 DAG size of output: 597 [2021-07-13 19:28:06,370 WARN L205 SmtUtils]: Spent 505.00 ms on a formula simplification. DAG size of input: 778 DAG size of output: 597 [2021-07-13 19:28:07,056 WARN L205 SmtUtils]: Spent 680.00 ms on a formula simplification. DAG size of input: 788 DAG size of output: 633 [2021-07-13 19:28:07,475 WARN L205 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 599 DAG size of output: 599 [2021-07-13 19:28:07,760 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 529 DAG size of output: 529 [2021-07-13 19:28:08,768 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 507 DAG size of output: 300 [2021-07-13 19:28:08,932 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 589 DAG size of output: 325 [2021-07-13 19:28:09,159 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 632 DAG size of output: 375 [2021-07-13 19:28:09,369 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 632 DAG size of output: 375 [2021-07-13 19:28:09,604 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 637 DAG size of output: 381 [2021-07-13 19:28:09,777 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 383 DAG size of output: 298 [2021-07-13 19:28:10,795 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:10,796 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:28:10,796 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:28:10,796 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-07-13 19:28:10,802 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:10,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72973112] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:10,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:10,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-07-13 19:28:10,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326416553] [2021-07-13 19:28:10,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:28:10,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:10,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:28:10,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:28:10,803 INFO L87 Difference]: Start difference. First operand 915 states and 2905 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:11,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:11,094 INFO L93 Difference]: Finished difference Result 1209 states and 3643 transitions. [2021-07-13 19:28:11,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:28:11,094 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:28:11,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:11,097 INFO L225 Difference]: With dead ends: 1209 [2021-07-13 19:28:11,097 INFO L226 Difference]: Without dead ends: 1206 [2021-07-13 19:28:11,097 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 237.6ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:28:11,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1206 states. [2021-07-13 19:28:11,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1206 to 1042. [2021-07-13 19:28:11,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1042 states, 1041 states have (on average 3.2526416906820366) internal successors, (3386), 1041 states have internal predecessors, (3386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:11,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1042 states to 1042 states and 3386 transitions. [2021-07-13 19:28:11,116 INFO L78 Accepts]: Start accepts. Automaton has 1042 states and 3386 transitions. Word has length 21 [2021-07-13 19:28:11,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:11,116 INFO L482 AbstractCegarLoop]: Abstraction has 1042 states and 3386 transitions. [2021-07-13 19:28:11,116 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:11,116 INFO L276 IsEmpty]: Start isEmpty. Operand 1042 states and 3386 transitions. [2021-07-13 19:28:11,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:28:11,118 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:11,118 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:11,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7256 [2021-07-13 19:28:11,319 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:11,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:11,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1169617497, now seen corresponding path program 73 times [2021-07-13 19:28:11,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:11,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586536255] [2021-07-13 19:28:11,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:11,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:11,393 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:28:11,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:11,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586536255] [2021-07-13 19:28:11,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586536255] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:11,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993359673] [2021-07-13 19:28:11,393 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 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 [2021-07-13 19:28:11,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:11,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:28:11,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:11,809 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-07-13 19:28:11,810 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:28:11,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-07-13 19:28:12,769 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 279 [2021-07-13 19:28:12,964 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 516 DAG size of output: 354 [2021-07-13 19:28:13,192 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 539 DAG size of output: 375 [2021-07-13 19:28:13,479 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 561 DAG size of output: 395 [2021-07-13 19:28:13,803 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 573 DAG size of output: 406 [2021-07-13 19:28:14,133 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 573 DAG size of output: 406 [2021-07-13 19:28:14,514 WARN L205 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 588 DAG size of output: 421 [2021-07-13 19:28:14,944 WARN L205 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 417 DAG size of output: 448 [2021-07-13 19:28:15,118 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 282 [2021-07-13 19:28:15,839 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 264 [2021-07-13 19:28:16,012 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 282 [2021-07-13 19:28:16,141 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 261 [2021-07-13 19:28:18,345 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 234 [2021-07-13 19:28:18,594 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 673 DAG size of output: 325 [2021-07-13 19:28:18,979 WARN L205 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 881 DAG size of output: 445 [2021-07-13 19:28:19,373 WARN L205 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 881 DAG size of output: 445 [2021-07-13 19:28:20,202 WARN L205 SmtUtils]: Spent 823.00 ms on a formula simplification. DAG size of input: 887 DAG size of output: 602 [2021-07-13 19:28:20,447 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 350 DAG size of output: 384 [2021-07-13 19:28:20,716 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 277 [2021-07-13 19:28:20,989 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 386 DAG size of output: 281 [2021-07-13 19:28:21,386 WARN L205 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 448 DAG size of output: 472 [2021-07-13 19:28:21,659 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 274 [2021-07-13 19:28:22,115 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 447 DAG size of output: 291 [2021-07-13 19:28:22,587 WARN L205 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 630 DAG size of output: 404 [2021-07-13 19:28:23,052 WARN L205 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 630 DAG size of output: 404 [2021-07-13 19:28:23,563 WARN L205 SmtUtils]: Spent 508.00 ms on a formula simplification. DAG size of input: 633 DAG size of output: 412 [2021-07-13 19:28:24,073 WARN L205 SmtUtils]: Spent 506.00 ms on a formula simplification. DAG size of input: 414 DAG size of output: 405 [2021-07-13 19:28:24,549 WARN L205 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 397 DAG size of output: 366 [2021-07-13 19:28:24,965 WARN L205 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 463 [2021-07-13 19:28:25,717 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 394 [2021-07-13 19:28:26,274 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 413 DAG size of output: 263 [2021-07-13 19:28:26,437 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 621 DAG size of output: 326 [2021-07-13 19:28:26,785 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 703 DAG size of output: 369 [2021-07-13 19:28:27,038 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 716 DAG size of output: 379 [2021-07-13 19:28:27,302 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 716 DAG size of output: 379 [2021-07-13 19:28:27,593 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 720 DAG size of output: 383 [2021-07-13 19:28:27,867 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 385 DAG size of output: 409 [2021-07-13 19:28:28,051 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 382 DAG size of output: 258 [2021-07-13 19:28:28,376 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:28:28,385 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:28:28,385 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:28:28,386 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-07-13 19:28:28,392 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:28,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993359673] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:28,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:28,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-07-13 19:28:28,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6932233] [2021-07-13 19:28:28,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:28:28,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:28,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:28:28,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:28:28,393 INFO L87 Difference]: Start difference. First operand 1042 states and 3386 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:28,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:28,664 INFO L93 Difference]: Finished difference Result 1356 states and 4198 transitions. [2021-07-13 19:28:28,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:28:28,664 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:28:28,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:28,668 INFO L225 Difference]: With dead ends: 1356 [2021-07-13 19:28:28,668 INFO L226 Difference]: Without dead ends: 1353 [2021-07-13 19:28:28,669 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 234.3ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:28:28,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1353 states. [2021-07-13 19:28:28,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1353 to 1190. [2021-07-13 19:28:28,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1190 states, 1189 states have (on average 3.3187552565180822) internal successors, (3946), 1189 states have internal predecessors, (3946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:28,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1190 states to 1190 states and 3946 transitions. [2021-07-13 19:28:28,693 INFO L78 Accepts]: Start accepts. Automaton has 1190 states and 3946 transitions. Word has length 21 [2021-07-13 19:28:28,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:28,693 INFO L482 AbstractCegarLoop]: Abstraction has 1190 states and 3946 transitions. [2021-07-13 19:28:28,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:28,693 INFO L276 IsEmpty]: Start isEmpty. Operand 1190 states and 3946 transitions. [2021-07-13 19:28:28,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:28:28,695 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:28,695 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:28,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8393 [2021-07-13 19:28:28,909 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:28,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:28,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1385295257, now seen corresponding path program 74 times [2021-07-13 19:28:28,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:28,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362730302] [2021-07-13 19:28:28,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:28,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:28,996 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:28:28,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:28,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362730302] [2021-07-13 19:28:28,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362730302] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:28,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230593389] [2021-07-13 19:28:28,996 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 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 [2021-07-13 19:28:29,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:28:29,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:29,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:28:29,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:29,452 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-07-13 19:28:29,452 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:28:29,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-07-13 19:28:30,063 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 291 [2021-07-13 19:28:30,202 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 312 [2021-07-13 19:28:30,359 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 350 DAG size of output: 318 [2021-07-13 19:28:30,988 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 309 DAG size of output: 285 [2021-07-13 19:28:31,122 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 324 DAG size of output: 292 [2021-07-13 19:28:31,445 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 536 DAG size of output: 489 [2021-07-13 19:28:31,771 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 536 DAG size of output: 489 [2021-07-13 19:28:32,145 WARN L205 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 551 DAG size of output: 505 [2021-07-13 19:28:32,803 WARN L205 SmtUtils]: Spent 654.00 ms on a formula simplification. DAG size of input: 507 DAG size of output: 616 [2021-07-13 19:28:33,096 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 288 [2021-07-13 19:28:33,517 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 328 [2021-07-13 19:28:33,749 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 277 DAG size of output: 349 [2021-07-13 19:28:33,903 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 276 [2021-07-13 19:28:34,790 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 487 DAG size of output: 302 [2021-07-13 19:28:34,905 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 240 [2021-07-13 19:28:35,659 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 413 DAG size of output: 293 [2021-07-13 19:28:35,877 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 492 DAG size of output: 360 [2021-07-13 19:28:36,241 WARN L205 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 789 DAG size of output: 478 [2021-07-13 19:28:36,395 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 293 [2021-07-13 19:28:36,500 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 225 [2021-07-13 19:28:37,117 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 400 DAG size of output: 280 [2021-07-13 19:28:37,298 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 469 DAG size of output: 334 [2021-07-13 19:28:37,443 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 243 [2021-07-13 19:28:38,149 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 443 DAG size of output: 280 [2021-07-13 19:28:38,463 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 714 DAG size of output: 442 [2021-07-13 19:28:39,162 WARN L205 SmtUtils]: Spent 691.00 ms on a formula simplification. DAG size of input: 1161 DAG size of output: 684 [2021-07-13 19:28:40,054 WARN L205 SmtUtils]: Spent 886.00 ms on a formula simplification. DAG size of input: 1270 DAG size of output: 761 [2021-07-13 19:28:40,331 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 325 DAG size of output: 306 [2021-07-13 19:28:40,853 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 392 [2021-07-13 19:28:41,197 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 301 DAG size of output: 388 [2021-07-13 19:28:41,429 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 322 [2021-07-13 19:28:41,577 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 228 DAG size of output: 287 [2021-07-13 19:28:42,338 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 397 DAG size of output: 302 [2021-07-13 19:28:42,489 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 439 DAG size of output: 316 [2021-07-13 19:28:42,684 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 458 DAG size of output: 327 [2021-07-13 19:28:42,904 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 544 DAG size of output: 364 [2021-07-13 19:28:43,213 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 637 DAG size of output: 433 [2021-07-13 19:28:43,404 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 286 [2021-07-13 19:28:44,183 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 259 [2021-07-13 19:28:44,302 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 379 DAG size of output: 314 [2021-07-13 19:28:44,453 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 467 DAG size of output: 388 [2021-07-13 19:28:44,708 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 514 DAG size of output: 413 [2021-07-13 19:28:44,993 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 596 DAG size of output: 488 [2021-07-13 19:28:45,332 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 620 DAG size of output: 480 [2021-07-13 19:28:45,774 WARN L205 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 706 DAG size of output: 550 [2021-07-13 19:28:46,530 WARN L205 SmtUtils]: Spent 751.00 ms on a formula simplification. DAG size of input: 1142 DAG size of output: 736 [2021-07-13 19:28:46,781 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 340 [2021-07-13 19:28:47,655 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 259 [2021-07-13 19:28:47,781 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 395 DAG size of output: 307 [2021-07-13 19:28:47,937 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 473 DAG size of output: 370 [2021-07-13 19:28:48,170 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 539 DAG size of output: 432 [2021-07-13 19:28:48,487 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 588 DAG size of output: 428 [2021-07-13 19:28:48,607 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 261 [2021-07-13 19:28:48,717 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 246 [2021-07-13 19:28:49,515 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 466 DAG size of output: 354 [2021-07-13 19:28:49,688 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 484 DAG size of output: 339 [2021-07-13 19:28:49,917 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 569 DAG size of output: 423 [2021-07-13 19:28:50,227 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 641 DAG size of output: 483 [2021-07-13 19:28:50,833 WARN L205 SmtUtils]: Spent 603.00 ms on a formula simplification. DAG size of input: 1002 DAG size of output: 691 [2021-07-13 19:28:52,256 WARN L205 SmtUtils]: Spent 1.42 s on a formula simplification. DAG size of input: 1870 DAG size of output: 1108 [2021-07-13 19:28:53,943 WARN L205 SmtUtils]: Spent 1.68 s on a formula simplification. DAG size of input: 2044 DAG size of output: 1183 [2021-07-13 19:28:56,879 WARN L205 SmtUtils]: Spent 2.93 s on a formula simplification. DAG size of input: 2890 DAG size of output: 1692 [2021-07-13 19:28:57,018 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 289 [2021-07-13 19:28:57,354 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 279 DAG size of output: 354 [2021-07-13 19:28:57,559 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 354 [2021-07-13 19:28:57,795 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 264 DAG size of output: 309 [2021-07-13 19:28:57,897 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 243 [2021-07-13 19:28:58,786 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 369 DAG size of output: 290 [2021-07-13 19:28:58,953 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 369 DAG size of output: 290 [2021-07-13 19:28:59,130 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 293 [2021-07-13 19:28:59,285 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 267 [2021-07-13 19:29:00,293 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 268 [2021-07-13 19:29:00,500 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 378 DAG size of output: 298 [2021-07-13 19:29:00,699 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 378 DAG size of output: 298 [2021-07-13 19:29:00,926 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 381 DAG size of output: 301 [2021-07-13 19:29:01,382 WARN L205 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 652 DAG size of output: 485 [2021-07-13 19:29:01,526 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 303 [2021-07-13 19:29:02,412 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 295 DAG size of output: 258 [2021-07-13 19:29:02,594 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 355 DAG size of output: 291 [2021-07-13 19:29:02,780 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 355 DAG size of output: 291 [2021-07-13 19:29:02,981 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 358 DAG size of output: 294 [2021-07-13 19:29:03,099 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 232 DAG size of output: 270 [2021-07-13 19:29:03,918 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 261 [2021-07-13 19:29:04,046 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 261 [2021-07-13 19:29:04,192 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 264 [2021-07-13 19:29:04,581 WARN L205 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 580 DAG size of output: 443 [2021-07-13 19:29:05,506 WARN L205 SmtUtils]: Spent 921.00 ms on a formula simplification. DAG size of input: 987 DAG size of output: 722 [2021-07-13 19:29:06,647 WARN L205 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 1072 DAG size of output: 775 [2021-07-13 19:29:10,788 WARN L205 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 3707 DAG size of output: 2079 [2021-07-13 19:29:14,926 WARN L205 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 3707 DAG size of output: 2079 [2021-07-13 19:29:19,540 WARN L205 SmtUtils]: Spent 4.60 s on a formula simplification. DAG size of input: 3718 DAG size of output: 2090 [2021-07-13 19:29:19,729 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 2086 [2021-07-13 19:29:24,217 WARN L205 SmtUtils]: Spent 4.48 s on a formula simplification. DAG size of input: 2088 DAG size of output: 2316 [2021-07-13 19:29:24,360 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 1575 [2021-07-13 19:29:24,505 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 324 DAG size of output: 265 [2021-07-13 19:29:26,567 WARN L205 SmtUtils]: Spent 1.56 s on a formula simplification. DAG size of input: 1537 DAG size of output: 1228 [2021-07-13 19:29:28,520 WARN L205 SmtUtils]: Spent 1.94 s on a formula simplification. DAG size of input: 1226 DAG size of output: 1271 [2021-07-13 19:29:29,130 WARN L205 SmtUtils]: Spent 548.00 ms on a formula simplification. DAG size of input: 452 DAG size of output: 575 [2021-07-13 19:29:29,471 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 301 DAG size of output: 251 [2021-07-13 19:29:29,919 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 270 [2021-07-13 19:29:30,127 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 458 DAG size of output: 313 [2021-07-13 19:29:30,637 WARN L205 SmtUtils]: Spent 507.00 ms on a formula simplification. DAG size of input: 752 DAG size of output: 581 [2021-07-13 19:29:31,828 WARN L205 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 806 DAG size of output: 1066 [2021-07-13 19:29:32,115 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 586 DAG size of output: 317 [2021-07-13 19:29:32,542 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 291 DAG size of output: 223 [2021-07-13 19:29:33,565 WARN L205 SmtUtils]: Spent 559.00 ms on a formula simplification. DAG size of input: 682 DAG size of output: 578 [2021-07-13 19:29:34,259 WARN L205 SmtUtils]: Spent 691.00 ms on a formula simplification. DAG size of input: 843 DAG size of output: 694 [2021-07-13 19:29:35,562 WARN L205 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 1351 DAG size of output: 1077 [2021-07-13 19:29:38,490 WARN L205 SmtUtils]: Spent 2.92 s on a formula simplification. DAG size of input: 2520 DAG size of output: 1683 [2021-07-13 19:29:41,368 WARN L205 SmtUtils]: Spent 2.87 s on a formula simplification. DAG size of input: 2520 DAG size of output: 1683 [2021-07-13 19:29:44,417 WARN L205 SmtUtils]: Spent 3.04 s on a formula simplification. DAG size of input: 2529 DAG size of output: 1364 [2021-07-13 19:29:45,343 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 485 DAG size of output: 273 [2021-07-13 19:29:46,337 WARN L205 SmtUtils]: Spent 798.00 ms on a formula simplification. DAG size of input: 1112 DAG size of output: 857 [2021-07-13 19:29:47,128 WARN L205 SmtUtils]: Spent 786.00 ms on a formula simplification. DAG size of input: 1112 DAG size of output: 857 [2021-07-13 19:29:47,993 WARN L205 SmtUtils]: Spent 860.00 ms on a formula simplification. DAG size of input: 1115 DAG size of output: 860 [2021-07-13 19:29:48,473 WARN L205 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 862 DAG size of output: 608 [2021-07-13 19:29:48,640 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 449 DAG size of output: 478 [2021-07-13 19:29:49,380 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 423 DAG size of output: 278 [2021-07-13 19:29:49,649 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:49,650 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:29:49,650 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:29:49,650 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-07-13 19:29:49,656 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:49,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230593389] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:49,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:49,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-07-13 19:29:49,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976400428] [2021-07-13 19:29:49,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:29:49,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:49,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:29:49,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:29:49,657 INFO L87 Difference]: Start difference. First operand 1190 states and 3946 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:49,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:49,944 INFO L93 Difference]: Finished difference Result 1521 states and 4814 transitions. [2021-07-13 19:29:49,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:29:49,944 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:29:49,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:49,947 INFO L225 Difference]: With dead ends: 1521 [2021-07-13 19:29:49,947 INFO L226 Difference]: Without dead ends: 1518 [2021-07-13 19:29:49,948 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 266.7ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:29:49,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1518 states. [2021-07-13 19:29:49,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1518 to 1352. [2021-07-13 19:29:49,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1352 states, 1351 states have (on average 3.37379718726869) internal successors, (4558), 1351 states have internal predecessors, (4558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:49,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 4558 transitions. [2021-07-13 19:29:49,967 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 4558 transitions. Word has length 21 [2021-07-13 19:29:49,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:49,967 INFO L482 AbstractCegarLoop]: Abstraction has 1352 states and 4558 transitions. [2021-07-13 19:29:49,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:49,967 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 4558 transitions. [2021-07-13 19:29:49,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:29:49,969 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:49,969 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:50,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9235 [2021-07-13 19:29:50,170 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:50,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:50,170 INFO L82 PathProgramCache]: Analyzing trace with hash -518628775, now seen corresponding path program 75 times [2021-07-13 19:29:50,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:50,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415871775] [2021-07-13 19:29:50,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:50,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:50,241 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:29:50,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:50,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415871775] [2021-07-13 19:29:50,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415871775] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:50,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912119211] [2021-07-13 19:29:50,241 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 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 [2021-07-13 19:29:50,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 19:29:50,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:50,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:29:50,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:50,656 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-07-13 19:29:50,657 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:29:50,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-07-13 19:29:51,456 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 272 [2021-07-13 19:29:51,593 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 292 [2021-07-13 19:29:52,316 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 289 [2021-07-13 19:29:52,448 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 307 [2021-07-13 19:29:52,624 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 380 DAG size of output: 326 [2021-07-13 19:29:52,996 WARN L205 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 594 DAG size of output: 482 [2021-07-13 19:29:53,446 WARN L205 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 612 DAG size of output: 500 [2021-07-13 19:29:53,877 WARN L205 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 612 DAG size of output: 500 [2021-07-13 19:29:54,392 WARN L205 SmtUtils]: Spent 512.00 ms on a formula simplification. DAG size of input: 628 DAG size of output: 516 [2021-07-13 19:29:55,418 WARN L205 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 518 DAG size of output: 643 [2021-07-13 19:29:55,955 WARN L205 SmtUtils]: Spent 532.00 ms on a formula simplification. DAG size of input: 392 DAG size of output: 475 [2021-07-13 19:29:56,486 WARN L205 SmtUtils]: Spent 526.00 ms on a formula simplification. DAG size of input: 390 DAG size of output: 474 [2021-07-13 19:29:56,687 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 276 DAG size of output: 316 [2021-07-13 19:29:56,936 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 259 DAG size of output: 332 [2021-07-13 19:29:57,136 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 325 [2021-07-13 19:29:58,060 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 217 [2021-07-13 19:29:58,216 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 239 [2021-07-13 19:29:58,993 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 216 [2021-07-13 19:29:59,268 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 375 DAG size of output: 301 [2021-07-13 19:30:00,106 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 249 [2021-07-13 19:30:00,882 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 461 DAG size of output: 371 [2021-07-13 19:30:01,519 WARN L205 SmtUtils]: Spent 633.00 ms on a formula simplification. DAG size of input: 685 DAG size of output: 520 [2021-07-13 19:30:02,355 WARN L205 SmtUtils]: Spent 832.00 ms on a formula simplification. DAG size of input: 767 DAG size of output: 574 [2021-07-13 19:30:03,326 WARN L205 SmtUtils]: Spent 967.00 ms on a formula simplification. DAG size of input: 853 DAG size of output: 633 [2021-07-13 19:30:04,363 WARN L205 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 890 DAG size of output: 657 [2021-07-13 19:30:04,617 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 262 DAG size of output: 333 [2021-07-13 19:30:04,821 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 259 DAG size of output: 336 [2021-07-13 19:30:04,989 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 287 [2021-07-13 19:30:06,541 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 232 [2021-07-13 19:30:06,898 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 424 DAG size of output: 366 [2021-07-13 19:30:07,359 WARN L205 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 510 DAG size of output: 411 [2021-07-13 19:30:07,646 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 301 [2021-07-13 19:30:08,780 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 178 [2021-07-13 19:30:09,301 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 255 DAG size of output: 263 [2021-07-13 19:30:09,542 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 361 [2021-07-13 19:30:10,219 WARN L205 SmtUtils]: Spent 674.00 ms on a formula simplification. DAG size of input: 690 DAG size of output: 569 [2021-07-13 19:30:10,892 WARN L205 SmtUtils]: Spent 669.00 ms on a formula simplification. DAG size of input: 719 DAG size of output: 583 [2021-07-13 19:30:11,734 WARN L205 SmtUtils]: Spent 837.00 ms on a formula simplification. DAG size of input: 812 DAG size of output: 644 [2021-07-13 19:30:12,756 WARN L205 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 895 DAG size of output: 705 [2021-07-13 19:30:14,955 WARN L205 SmtUtils]: Spent 2.19 s on a formula simplification. DAG size of input: 1440 DAG size of output: 1133 [2021-07-13 19:30:15,507 WARN L205 SmtUtils]: Spent 543.00 ms on a formula simplification. DAG size of input: 382 DAG size of output: 450 [2021-07-13 19:30:15,712 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 316 [2021-07-13 19:30:17,243 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 260 [2021-07-13 19:30:17,517 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 407 DAG size of output: 341 [2021-07-13 19:30:17,839 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 450 DAG size of output: 367 [2021-07-13 19:30:18,237 WARN L205 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 487 DAG size of output: 395 [2021-07-13 19:30:18,701 WARN L205 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 529 DAG size of output: 417 [2021-07-13 19:30:19,644 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 296 [2021-07-13 19:30:20,286 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 533 DAG size of output: 410 [2021-07-13 19:30:20,598 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 580 DAG size of output: 438 [2021-07-13 19:30:20,971 WARN L205 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 621 DAG size of output: 471 [2021-07-13 19:30:21,953 WARN L205 SmtUtils]: Spent 978.00 ms on a formula simplification. DAG size of input: 959 DAG size of output: 665 [2021-07-13 19:30:22,906 WARN L205 SmtUtils]: Spent 909.00 ms on a formula simplification. DAG size of input: 992 DAG size of output: 678 [2021-07-13 19:30:23,185 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 347 [2021-07-13 19:30:23,403 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 331 [2021-07-13 19:30:23,556 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 324 [2021-07-13 19:30:24,285 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 230 [2021-07-13 19:30:24,421 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 251 [2021-07-13 19:30:24,585 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 271 [2021-07-13 19:30:25,273 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 268 DAG size of output: 241 [2021-07-13 19:30:25,434 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 271 [2021-07-13 19:30:25,770 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 527 DAG size of output: 418 [2021-07-13 19:30:25,975 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 249 DAG size of output: 310 [2021-07-13 19:30:26,995 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 275 [2021-07-13 19:30:27,671 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 377 DAG size of output: 365 [2021-07-13 19:30:28,346 WARN L205 SmtUtils]: Spent 672.00 ms on a formula simplification. DAG size of input: 723 DAG size of output: 549 [2021-07-13 19:30:29,203 WARN L205 SmtUtils]: Spent 853.00 ms on a formula simplification. DAG size of input: 815 DAG size of output: 620 [2021-07-13 19:30:30,048 WARN L205 SmtUtils]: Spent 842.00 ms on a formula simplification. DAG size of input: 846 DAG size of output: 634 [2021-07-13 19:30:31,082 WARN L205 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 938 DAG size of output: 703 [2021-07-13 19:30:33,145 WARN L205 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 1564 DAG size of output: 1152 [2021-07-13 19:30:35,742 WARN L205 SmtUtils]: Spent 2.59 s on a formula simplification. DAG size of input: 1734 DAG size of output: 1295 [2021-07-13 19:30:41,059 WARN L205 SmtUtils]: Spent 5.31 s on a formula simplification. DAG size of input: 2788 DAG size of output: 2064 [2021-07-13 19:30:46,647 WARN L205 SmtUtils]: Spent 5.58 s on a formula simplification. DAG size of input: 2928 DAG size of output: 2124 [2021-07-13 19:30:53,844 WARN L205 SmtUtils]: Spent 7.18 s on a formula simplification. DAG size of input: 3163 DAG size of output: 2214 [2021-07-13 19:31:00,858 WARN L205 SmtUtils]: Spent 7.00 s on a formula simplification. DAG size of input: 3163 DAG size of output: 2214 [2021-07-13 19:31:08,612 WARN L205 SmtUtils]: Spent 7.74 s on a formula simplification. DAG size of input: 3174 DAG size of output: 2225 [2021-07-13 19:31:09,346 WARN L205 SmtUtils]: Spent 724.00 ms on a formula simplification. DAG size of input: 2225 DAG size of output: 2208 [2021-07-13 19:31:21,070 WARN L205 SmtUtils]: Spent 11.71 s on a formula simplification. DAG size of input: 2137 DAG size of output: 2835 [2021-07-13 19:31:23,777 WARN L205 SmtUtils]: Spent 2.70 s on a formula simplification. DAG size of input: 1075 DAG size of output: 1188 [2021-07-13 19:31:25,633 WARN L205 SmtUtils]: Spent 1.85 s on a formula simplification. DAG size of input: 838 DAG size of output: 931 [2021-07-13 19:31:25,916 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 476 DAG size of output: 318 [2021-07-13 19:31:26,102 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 276 DAG size of output: 383 [2021-07-13 19:31:26,219 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 214 [2021-07-13 19:31:26,719 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 338 DAG size of output: 273 [2021-07-13 19:31:27,123 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 416 DAG size of output: 328 [2021-07-13 19:31:27,805 WARN L205 SmtUtils]: Spent 679.00 ms on a formula simplification. DAG size of input: 1012 DAG size of output: 535 [2021-07-13 19:31:29,260 WARN L205 SmtUtils]: Spent 1.45 s on a formula simplification. DAG size of input: 601 DAG size of output: 858 [2021-07-13 19:31:29,721 WARN L205 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 590 DAG size of output: 436 [2021-07-13 19:31:30,035 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 396 DAG size of output: 321 [2021-07-13 19:31:30,637 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 289 DAG size of output: 248 [2021-07-13 19:31:30,787 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 306 DAG size of output: 256 [2021-07-13 19:31:31,328 WARN L205 SmtUtils]: Spent 539.00 ms on a formula simplification. DAG size of input: 700 DAG size of output: 510 [2021-07-13 19:31:32,357 WARN L205 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 1520 DAG size of output: 716 [2021-07-13 19:31:34,433 WARN L205 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 1982 DAG size of output: 1850 [2021-07-13 19:31:37,820 WARN L205 SmtUtils]: Spent 3.38 s on a formula simplification. DAG size of input: 1065 DAG size of output: 1160 [2021-07-13 19:31:39,104 WARN L205 SmtUtils]: Spent 1.28 s on a formula simplification. DAG size of input: 616 DAG size of output: 881 [2021-07-13 19:31:40,359 WARN L205 SmtUtils]: Spent 1.25 s on a formula simplification. DAG size of input: 605 DAG size of output: 873 [2021-07-13 19:31:40,503 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 592 DAG size of output: 559 [2021-07-13 19:31:40,870 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 516 DAG size of output: 360 [2021-07-13 19:31:41,004 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 245 [2021-07-13 19:31:41,582 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 303 DAG size of output: 252 [2021-07-13 19:31:41,755 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 387 DAG size of output: 316 [2021-07-13 19:31:42,200 WARN L205 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 775 DAG size of output: 487 [2021-07-13 19:31:43,120 WARN L205 SmtUtils]: Spent 917.00 ms on a formula simplification. DAG size of input: 1169 DAG size of output: 828 [2021-07-13 19:31:44,002 WARN L205 SmtUtils]: Spent 875.00 ms on a formula simplification. DAG size of input: 796 DAG size of output: 592 [2021-07-13 19:31:44,502 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 343 [2021-07-13 19:31:44,656 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 364 [2021-07-13 19:31:44,934 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 367 [2021-07-13 19:31:45,496 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 269 [2021-07-13 19:31:45,729 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 513 DAG size of output: 405 [2021-07-13 19:31:46,080 WARN L205 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 657 DAG size of output: 463 [2021-07-13 19:31:46,813 WARN L205 SmtUtils]: Spent 729.00 ms on a formula simplification. DAG size of input: 1049 DAG size of output: 630 [2021-07-13 19:31:48,711 WARN L205 SmtUtils]: Spent 1.89 s on a formula simplification. DAG size of input: 1986 DAG size of output: 1308 [2021-07-13 19:31:51,599 WARN L205 SmtUtils]: Spent 2.88 s on a formula simplification. DAG size of input: 2724 DAG size of output: 1643 [2021-07-13 19:31:55,180 WARN L205 SmtUtils]: Spent 3.56 s on a formula simplification. DAG size of input: 3974 DAG size of output: 1745 [2021-07-13 19:31:59,255 WARN L205 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 4043 DAG size of output: 1781 [2021-07-13 19:32:03,319 WARN L205 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 4043 DAG size of output: 1781 [2021-07-13 19:32:07,655 WARN L205 SmtUtils]: Spent 4.31 s on a formula simplification. DAG size of input: 4048 DAG size of output: 1786 [2021-07-13 19:32:09,830 WARN L205 SmtUtils]: Spent 2.16 s on a formula simplification. DAG size of input: 1788 DAG size of output: 1154 [2021-07-13 19:32:09,994 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 861 DAG size of output: 861 [2021-07-13 19:32:11,186 WARN L205 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 858 DAG size of output: 808 [2021-07-13 19:32:11,334 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 223 DAG size of output: 194 [2021-07-13 19:32:11,760 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 292 DAG size of output: 275 [2021-07-13 19:32:12,292 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 516 DAG size of output: 344 [2021-07-13 19:32:12,628 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 666 DAG size of output: 437 [2021-07-13 19:32:13,033 WARN L205 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 671 DAG size of output: 440 [2021-07-13 19:32:13,441 WARN L205 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 446 DAG size of output: 372 [2021-07-13 19:32:13,609 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 262 DAG size of output: 254 [2021-07-13 19:32:13,835 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 136 [2021-07-13 19:32:13,998 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 235 [2021-07-13 19:32:14,599 WARN L205 SmtUtils]: Spent 599.00 ms on a formula simplification. DAG size of input: 902 DAG size of output: 592 [2021-07-13 19:32:15,208 WARN L205 SmtUtils]: Spent 605.00 ms on a formula simplification. DAG size of input: 902 DAG size of output: 592 [2021-07-13 19:32:15,856 WARN L205 SmtUtils]: Spent 641.00 ms on a formula simplification. DAG size of input: 904 DAG size of output: 594 [2021-07-13 19:32:16,429 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 462 DAG size of output: 231 [2021-07-13 19:32:16,538 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 462 DAG size of output: 231 [2021-07-13 19:32:16,659 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 466 DAG size of output: 235 [2021-07-13 19:32:16,826 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:32:16,827 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:32:16,827 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:32:16,827 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-07-13 19:32:16,833 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:16,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912119211] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:16,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:16,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-07-13 19:32:16,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772169415] [2021-07-13 19:32:16,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:32:16,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:16,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:32:16,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:32:16,834 INFO L87 Difference]: Start difference. First operand 1352 states and 4558 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:17,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:17,110 INFO L93 Difference]: Finished difference Result 1650 states and 5275 transitions. [2021-07-13 19:32:17,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:32:17,110 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:32:17,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:17,115 INFO L225 Difference]: With dead ends: 1650 [2021-07-13 19:32:17,115 INFO L226 Difference]: Without dead ends: 1647 [2021-07-13 19:32:17,116 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 232.3ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:32:17,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1647 states. [2021-07-13 19:32:17,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1647 to 1485. [2021-07-13 19:32:17,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1485 states, 1484 states have (on average 3.391509433962264) internal successors, (5033), 1484 states have internal predecessors, (5033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:17,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1485 states to 1485 states and 5033 transitions. [2021-07-13 19:32:17,145 INFO L78 Accepts]: Start accepts. Automaton has 1485 states and 5033 transitions. Word has length 21 [2021-07-13 19:32:17,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:17,145 INFO L482 AbstractCegarLoop]: Abstraction has 1485 states and 5033 transitions. [2021-07-13 19:32:17,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:32:17,145 INFO L276 IsEmpty]: Start isEmpty. Operand 1485 states and 5033 transitions. [2021-07-13 19:32:17,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:32:17,147 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:17,147 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:17,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11252,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:17,371 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:17,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:17,371 INFO L82 PathProgramCache]: Analyzing trace with hash 589268377, now seen corresponding path program 76 times [2021-07-13 19:32:17,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:17,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663639019] [2021-07-13 19:32:17,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:17,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:17,444 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:32:17,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:17,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663639019] [2021-07-13 19:32:17,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663639019] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:17,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804191797] [2021-07-13 19:32:17,444 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 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 [2021-07-13 19:32:17,469 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:32:17,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:17,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:32:17,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:17,856 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-07-13 19:32:17,857 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:32:17,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-07-13 19:32:18,589 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 278 [2021-07-13 19:32:18,737 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 283 [2021-07-13 19:32:18,903 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 303 [2021-07-13 19:32:19,068 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 303 [2021-07-13 19:32:19,285 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 382 DAG size of output: 318 [2021-07-13 19:32:19,629 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 388 [2021-07-13 19:32:20,059 WARN L205 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 416 [2021-07-13 19:32:20,255 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 271 DAG size of output: 323 [2021-07-13 19:32:20,472 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 268 DAG size of output: 340 [2021-07-13 19:32:20,614 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 286 [2021-07-13 19:32:21,107 WARN L205 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 238 DAG size of output: 318 [2021-07-13 19:32:21,347 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 273 [2021-07-13 19:32:21,977 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 243 [2021-07-13 19:32:22,567 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 483 DAG size of output: 350 [2021-07-13 19:32:22,783 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 530 DAG size of output: 364 [2021-07-13 19:32:23,103 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 640 DAG size of output: 457 [2021-07-13 19:32:23,521 WARN L205 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 686 DAG size of output: 501 [2021-07-13 19:32:24,084 WARN L205 SmtUtils]: Spent 559.00 ms on a formula simplification. DAG size of input: 807 DAG size of output: 609 [2021-07-13 19:32:24,525 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 295 [2021-07-13 19:32:24,745 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 266 [2021-07-13 19:32:25,704 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 440 DAG size of output: 263 [2021-07-13 19:32:25,983 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 535 DAG size of output: 324 [2021-07-13 19:32:26,307 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 572 DAG size of output: 362 [2021-07-13 19:32:27,161 WARN L205 SmtUtils]: Spent 851.00 ms on a formula simplification. DAG size of input: 1218 DAG size of output: 764 [2021-07-13 19:32:28,307 WARN L205 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 1311 DAG size of output: 833 [2021-07-13 19:32:29,728 WARN L205 SmtUtils]: Spent 1.42 s on a formula simplification. DAG size of input: 1466 DAG size of output: 958 [2021-07-13 19:32:30,177 WARN L205 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 383 [2021-07-13 19:32:30,392 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 259 DAG size of output: 332 [2021-07-13 19:32:30,776 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 297 [2021-07-13 19:32:31,670 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 394 DAG size of output: 279 [2021-07-13 19:32:32,007 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 481 DAG size of output: 347 [2021-07-13 19:32:32,415 WARN L205 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 520 DAG size of output: 376 [2021-07-13 19:32:32,679 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 249 [2021-07-13 19:32:32,835 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 195 [2021-07-13 19:32:33,417 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 324 DAG size of output: 256 [2021-07-13 19:32:34,308 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 454 DAG size of output: 380 [2021-07-13 19:32:34,748 WARN L205 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 555 DAG size of output: 461 [2021-07-13 19:32:35,292 WARN L205 SmtUtils]: Spent 541.00 ms on a formula simplification. DAG size of input: 626 DAG size of output: 492 [2021-07-13 19:32:36,316 WARN L205 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 1016 DAG size of output: 713 [2021-07-13 19:32:37,624 WARN L205 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 1150 DAG size of output: 764 [2021-07-13 19:32:40,603 WARN L205 SmtUtils]: Spent 2.97 s on a formula simplification. DAG size of input: 2259 DAG size of output: 1437 [2021-07-13 19:32:43,578 WARN L205 SmtUtils]: Spent 2.97 s on a formula simplification. DAG size of input: 2259 DAG size of output: 1437 [2021-07-13 19:32:46,779 WARN L205 SmtUtils]: Spent 3.20 s on a formula simplification. DAG size of input: 2266 DAG size of output: 1444 [2021-07-13 19:32:46,907 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 1444 [2021-07-13 19:32:47,085 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 249 [2021-07-13 19:32:48,811 WARN L205 SmtUtils]: Spent 943.00 ms on a formula simplification. DAG size of input: 820 DAG size of output: 704 [2021-07-13 19:32:49,068 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 303 DAG size of output: 322 [2021-07-13 19:32:49,780 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 208 [2021-07-13 19:32:50,144 WARN L205 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 519 DAG size of output: 508 [2021-07-13 19:32:50,426 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 510 DAG size of output: 568 [2021-07-13 19:32:51,479 WARN L205 SmtUtils]: Spent 659.00 ms on a formula simplification. DAG size of input: 508 DAG size of output: 581 [2021-07-13 19:32:52,267 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 277 [2021-07-13 19:32:52,794 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 250 [2021-07-13 19:32:52,942 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 393 DAG size of output: 276 [2021-07-13 19:32:53,138 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 522 DAG size of output: 296 [2021-07-13 19:32:53,381 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 617 DAG size of output: 287 [2021-07-13 19:32:53,616 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 617 DAG size of output: 287 [2021-07-13 19:32:53,936 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 841 DAG size of output: 377 [2021-07-13 19:32:54,386 WARN L205 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 1071 DAG size of output: 518 [2021-07-13 19:32:55,110 WARN L205 SmtUtils]: Spent 716.00 ms on a formula simplification. DAG size of input: 773 DAG size of output: 772 [2021-07-13 19:32:55,241 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 769 DAG size of output: 756 [2021-07-13 19:32:55,903 WARN L205 SmtUtils]: Spent 657.00 ms on a formula simplification. DAG size of input: 720 DAG size of output: 525 [2021-07-13 19:32:56,332 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 325 DAG size of output: 349 [2021-07-13 19:32:57,445 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 421 DAG size of output: 229 [2021-07-13 19:32:57,596 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 532 DAG size of output: 270 [2021-07-13 19:32:57,831 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 576 DAG size of output: 310 [2021-07-13 19:32:57,998 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 577 DAG size of output: 311 [2021-07-13 19:32:58,676 WARN L205 SmtUtils]: Spent 674.00 ms on a formula simplification. DAG size of input: 1454 DAG size of output: 669 [2021-07-13 19:32:59,352 WARN L205 SmtUtils]: Spent 671.00 ms on a formula simplification. DAG size of input: 1454 DAG size of output: 669 [2021-07-13 19:33:00,080 WARN L205 SmtUtils]: Spent 723.00 ms on a formula simplification. DAG size of input: 1459 DAG size of output: 674 [2021-07-13 19:33:00,803 WARN L205 SmtUtils]: Spent 718.00 ms on a formula simplification. DAG size of input: 676 DAG size of output: 701 [2021-07-13 19:33:00,980 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 240 [2021-07-13 19:33:01,605 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 562 DAG size of output: 450 [2021-07-13 19:33:02,329 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 464 DAG size of output: 336 [2021-07-13 19:33:02,554 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 602 DAG size of output: 384 [2021-07-13 19:33:02,778 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 602 DAG size of output: 384 [2021-07-13 19:33:03,035 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 604 DAG size of output: 383 [2021-07-13 19:33:03,329 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 385 DAG size of output: 474 [2021-07-13 19:33:03,586 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 380 DAG size of output: 426 [2021-07-13 19:33:04,010 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 284 [2021-07-13 19:33:04,295 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 460 DAG size of output: 244 [2021-07-13 19:33:04,413 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 460 DAG size of output: 244 [2021-07-13 19:33:04,528 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 463 DAG size of output: 236 [2021-07-13 19:33:04,787 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:04,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:33:04,789 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:33:04,789 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-07-13 19:33:04,795 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:04,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804191797] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:04,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:04,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-07-13 19:33:04,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594678012] [2021-07-13 19:33:04,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:33:04,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:04,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:33:04,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:33:04,795 INFO L87 Difference]: Start difference. First operand 1485 states and 5033 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:05,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:05,095 INFO L93 Difference]: Finished difference Result 1787 states and 5757 transitions. [2021-07-13 19:33:05,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:33:05,095 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:33:05,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:05,099 INFO L225 Difference]: With dead ends: 1787 [2021-07-13 19:33:05,099 INFO L226 Difference]: Without dead ends: 1784 [2021-07-13 19:33:05,099 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 235.4ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:33:05,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1784 states. [2021-07-13 19:33:05,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1784 to 1621. [2021-07-13 19:33:05,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1621 states, 1620 states have (on average 3.404938271604938) internal successors, (5516), 1620 states have internal predecessors, (5516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:05,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 5516 transitions. [2021-07-13 19:33:05,123 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 5516 transitions. Word has length 21 [2021-07-13 19:33:05,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:05,123 INFO L482 AbstractCegarLoop]: Abstraction has 1621 states and 5516 transitions. [2021-07-13 19:33:05,123 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:05,123 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 5516 transitions. [2021-07-13 19:33:05,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:33:05,126 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:05,126 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:05,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15100 [2021-07-13 19:33:05,327 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:05,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:05,327 INFO L82 PathProgramCache]: Analyzing trace with hash 574341721, now seen corresponding path program 77 times [2021-07-13 19:33:05,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:05,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619942452] [2021-07-13 19:33:05,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:05,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:05,398 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:33:05,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:05,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619942452] [2021-07-13 19:33:05,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619942452] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:05,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113538874] [2021-07-13 19:33:05,399 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 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 [2021-07-13 19:33:05,424 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:33:05,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:05,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:33:05,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:05,832 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-07-13 19:33:05,832 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:33:05,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-07-13 19:33:06,511 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 300 [2021-07-13 19:33:06,656 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 316 [2021-07-13 19:33:06,833 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 383 DAG size of output: 339 [2021-07-13 19:33:07,021 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 383 DAG size of output: 339 [2021-07-13 19:33:07,237 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 398 DAG size of output: 355 [2021-07-13 19:33:07,564 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 357 DAG size of output: 449 [2021-07-13 19:33:08,129 WARN L205 SmtUtils]: Spent 560.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 482 [2021-07-13 19:33:08,301 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 310 [2021-07-13 19:33:08,427 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 252 DAG size of output: 289 [2021-07-13 19:33:08,590 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 220 DAG size of output: 239 [2021-07-13 19:33:09,442 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 239 [2021-07-13 19:33:09,644 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 257 [2021-07-13 19:33:10,541 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 381 DAG size of output: 242 [2021-07-13 19:33:10,794 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 519 DAG size of output: 318 [2021-07-13 19:33:11,788 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 364 DAG size of output: 245 [2021-07-13 19:33:12,703 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 322 DAG size of output: 208 [2021-07-13 19:33:12,858 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 384 DAG size of output: 245 [2021-07-13 19:33:13,187 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 525 DAG size of output: 335 [2021-07-13 19:33:13,819 WARN L205 SmtUtils]: Spent 629.00 ms on a formula simplification. DAG size of input: 919 DAG size of output: 534 [2021-07-13 19:33:14,698 WARN L205 SmtUtils]: Spent 874.00 ms on a formula simplification. DAG size of input: 1151 DAG size of output: 739 [2021-07-13 19:33:15,775 WARN L205 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 1322 DAG size of output: 850 [2021-07-13 19:33:16,866 WARN L205 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 1322 DAG size of output: 850 [2021-07-13 19:33:18,079 WARN L205 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 1333 DAG size of output: 861 [2021-07-13 19:33:20,886 WARN L205 SmtUtils]: Spent 2.80 s on a formula simplification. DAG size of input: 863 DAG size of output: 853 [2021-07-13 19:33:22,632 WARN L205 SmtUtils]: Spent 1.74 s on a formula simplification. DAG size of input: 840 DAG size of output: 1003 [2021-07-13 19:33:22,905 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 582 DAG size of output: 434 [2021-07-13 19:33:23,023 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 194 [2021-07-13 19:33:25,003 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 426 DAG size of output: 299 [2021-07-13 19:33:25,558 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 526 DAG size of output: 370 [2021-07-13 19:33:25,950 WARN L205 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 716 DAG size of output: 457 [2021-07-13 19:33:26,837 WARN L205 SmtUtils]: Spent 882.00 ms on a formula simplification. DAG size of input: 1159 DAG size of output: 615 [2021-07-13 19:33:28,330 WARN L205 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 1357 DAG size of output: 702 [2021-07-13 19:33:29,402 WARN L205 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 1357 DAG size of output: 702 [2021-07-13 19:33:30,525 WARN L205 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 1362 DAG size of output: 707 [2021-07-13 19:33:31,183 WARN L205 SmtUtils]: Spent 652.00 ms on a formula simplification. DAG size of input: 709 DAG size of output: 792 [2021-07-13 19:33:31,646 WARN L205 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 703 DAG size of output: 483 [2021-07-13 19:33:31,997 WARN L205 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 383 [2021-07-13 19:33:32,549 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 487 DAG size of output: 330 [2021-07-13 19:33:32,693 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 487 DAG size of output: 330 [2021-07-13 19:33:32,853 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 491 DAG size of output: 334 [2021-07-13 19:33:33,866 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:33,867 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:33:33,867 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:33:33,867 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-07-13 19:33:33,873 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:33,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113538874] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:33,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:33,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-07-13 19:33:33,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030831434] [2021-07-13 19:33:33,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:33:33,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:33,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:33:33,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:33:33,874 INFO L87 Difference]: Start difference. First operand 1621 states and 5516 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:34,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:34,112 INFO L93 Difference]: Finished difference Result 1931 states and 6243 transitions. [2021-07-13 19:33:34,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:33:34,112 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:33:34,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:34,115 INFO L225 Difference]: With dead ends: 1931 [2021-07-13 19:33:34,116 INFO L226 Difference]: Without dead ends: 1928 [2021-07-13 19:33:34,116 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 253.2ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:33:34,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1928 states. [2021-07-13 19:33:34,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1928 to 1762. [2021-07-13 19:33:34,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1762 states, 1761 states have (on average 3.4077228847245884) internal successors, (6001), 1761 states have internal predecessors, (6001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:34,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1762 states to 1762 states and 6001 transitions. [2021-07-13 19:33:34,141 INFO L78 Accepts]: Start accepts. Automaton has 1762 states and 6001 transitions. Word has length 21 [2021-07-13 19:33:34,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:34,141 INFO L482 AbstractCegarLoop]: Abstraction has 1762 states and 6001 transitions. [2021-07-13 19:33:34,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:34,141 INFO L276 IsEmpty]: Start isEmpty. Operand 1762 states and 6001 transitions. [2021-07-13 19:33:34,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:33:34,144 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:34,145 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:34,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16805,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:34,353 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:34,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:34,354 INFO L82 PathProgramCache]: Analyzing trace with hash 111615385, now seen corresponding path program 78 times [2021-07-13 19:33:34,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:34,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892415295] [2021-07-13 19:33:34,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:34,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:34,425 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:33:34,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:34,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892415295] [2021-07-13 19:33:34,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892415295] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:34,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531094030] [2021-07-13 19:33:34,426 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 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 [2021-07-13 19:33:34,454 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 19:33:34,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:34,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:33:34,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:34,846 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-07-13 19:33:34,846 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:33:34,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-07-13 19:33:35,390 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 308 [2021-07-13 19:33:35,514 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 319 [2021-07-13 19:33:36,137 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 528 DAG size of output: 419 [2021-07-13 19:33:36,895 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 421 DAG size of output: 301 [2021-07-13 19:33:37,324 WARN L205 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 833 DAG size of output: 613 [2021-07-13 19:33:37,740 WARN L205 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 833 DAG size of output: 613 [2021-07-13 19:33:38,257 WARN L205 SmtUtils]: Spent 514.00 ms on a formula simplification. DAG size of input: 850 DAG size of output: 631 [2021-07-13 19:33:38,825 WARN L205 SmtUtils]: Spent 524.00 ms on a formula simplification. DAG size of input: 627 DAG size of output: 700 [2021-07-13 19:33:38,966 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 621 DAG size of output: 621 [2021-07-13 19:33:39,072 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 257 [2021-07-13 19:33:40,050 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 427 DAG size of output: 333 [2021-07-13 19:33:41,677 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 273 [2021-07-13 19:33:41,876 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 447 DAG size of output: 332 [2021-07-13 19:33:42,130 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 474 DAG size of output: 365 [2021-07-13 19:33:42,625 WARN L205 SmtUtils]: Spent 492.00 ms on a formula simplification. DAG size of input: 661 DAG size of output: 459 [2021-07-13 19:33:43,154 WARN L205 SmtUtils]: Spent 525.00 ms on a formula simplification. DAG size of input: 761 DAG size of output: 522 [2021-07-13 19:33:43,686 WARN L205 SmtUtils]: Spent 528.00 ms on a formula simplification. DAG size of input: 761 DAG size of output: 522 [2021-07-13 19:33:44,394 WARN L205 SmtUtils]: Spent 703.00 ms on a formula simplification. DAG size of input: 770 DAG size of output: 554 [2021-07-13 19:33:44,917 WARN L205 SmtUtils]: Spent 518.00 ms on a formula simplification. DAG size of input: 523 DAG size of output: 548 [2021-07-13 19:33:45,089 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 515 DAG size of output: 514 [2021-07-13 19:33:45,200 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 450 DAG size of output: 449 [2021-07-13 19:33:45,990 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 263 [2021-07-13 19:33:46,346 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 474 DAG size of output: 214 [2021-07-13 19:33:46,501 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 518 DAG size of output: 249 [2021-07-13 19:33:46,645 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 518 DAG size of output: 249 [2021-07-13 19:33:46,810 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 525 DAG size of output: 260 [2021-07-13 19:33:46,956 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 262 DAG size of output: 265 [2021-07-13 19:33:47,168 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 209 [2021-07-13 19:33:47,890 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 222 [2021-07-13 19:33:48,824 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 509 DAG size of output: 328 [2021-07-13 19:33:48,996 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 509 DAG size of output: 328 [2021-07-13 19:33:49,176 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 513 DAG size of output: 332 [2021-07-13 19:33:49,374 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 353 [2021-07-13 19:33:49,978 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:49,980 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:33:49,980 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:33:49,980 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-07-13 19:33:49,986 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:49,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531094030] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:49,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:49,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-07-13 19:33:49,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375998607] [2021-07-13 19:33:49,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:33:49,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:49,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:33:49,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:33:49,987 INFO L87 Difference]: Start difference. First operand 1762 states and 6001 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:50,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:50,261 INFO L93 Difference]: Finished difference Result 2066 states and 6683 transitions. [2021-07-13 19:33:50,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:33:50,261 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:33:50,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:50,265 INFO L225 Difference]: With dead ends: 2066 [2021-07-13 19:33:50,265 INFO L226 Difference]: Without dead ends: 2063 [2021-07-13 19:33:50,265 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 239.8ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:33:50,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2063 states. [2021-07-13 19:33:50,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2063 to 1892. [2021-07-13 19:33:50,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1892 states, 1891 states have (on average 3.4045478582760444) internal successors, (6438), 1891 states have internal predecessors, (6438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:50,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1892 states to 1892 states and 6438 transitions. [2021-07-13 19:33:50,299 INFO L78 Accepts]: Start accepts. Automaton has 1892 states and 6438 transitions. Word has length 21 [2021-07-13 19:33:50,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:50,299 INFO L482 AbstractCegarLoop]: Abstraction has 1892 states and 6438 transitions. [2021-07-13 19:33:50,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:50,299 INFO L276 IsEmpty]: Start isEmpty. Operand 1892 states and 6438 transitions. [2021-07-13 19:33:50,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:33:50,302 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:50,302 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:50,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18613,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:50,517 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:50,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:50,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1347999143, now seen corresponding path program 79 times [2021-07-13 19:33:50,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:50,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235118910] [2021-07-13 19:33:50,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:50,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:50,599 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:33:50,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:50,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235118910] [2021-07-13 19:33:50,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235118910] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:50,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568416715] [2021-07-13 19:33:50,599 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 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 [2021-07-13 19:33:50,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:50,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:33:50,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:51,129 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-07-13 19:33:51,129 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:33:51,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-07-13 19:33:52,209 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 285 [2021-07-13 19:33:52,363 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 285 [2021-07-13 19:33:52,554 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 333 DAG size of output: 300 [2021-07-13 19:33:52,701 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 234 DAG size of output: 247 [2021-07-13 19:33:53,685 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 212 [2021-07-13 19:33:53,881 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 274 [2021-07-13 19:33:54,054 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 257 [2021-07-13 19:33:55,208 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 240 [2021-07-13 19:33:55,417 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 407 DAG size of output: 306 [2021-07-13 19:33:55,689 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 482 DAG size of output: 360 [2021-07-13 19:33:56,040 WARN L205 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 566 DAG size of output: 389 [2021-07-13 19:33:56,196 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 259 [2021-07-13 19:33:57,165 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 203 [2021-07-13 19:33:57,339 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 222 [2021-07-13 19:33:57,536 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 383 DAG size of output: 291 [2021-07-13 19:33:57,799 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 468 DAG size of output: 320 [2021-07-13 19:33:58,427 WARN L205 SmtUtils]: Spent 626.00 ms on a formula simplification. DAG size of input: 845 DAG size of output: 499 [2021-07-13 19:33:59,225 WARN L205 SmtUtils]: Spent 794.00 ms on a formula simplification. DAG size of input: 1057 DAG size of output: 607 [2021-07-13 19:34:00,183 WARN L205 SmtUtils]: Spent 953.00 ms on a formula simplification. DAG size of input: 1105 DAG size of output: 633 [2021-07-13 19:34:00,439 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 239 [2021-07-13 19:34:00,542 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 223 [2021-07-13 19:34:01,667 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 195 [2021-07-13 19:34:01,863 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 252 [2021-07-13 19:34:02,146 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 354 DAG size of output: 273 [2021-07-13 19:34:02,447 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 420 DAG size of output: 333 [2021-07-13 19:34:02,818 WARN L205 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 493 DAG size of output: 367 [2021-07-13 19:34:02,924 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 233 [2021-07-13 19:34:04,150 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 191 [2021-07-13 19:34:04,314 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 279 DAG size of output: 236 [2021-07-13 19:34:04,539 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 373 DAG size of output: 275 [2021-07-13 19:34:04,874 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 405 DAG size of output: 297 [2021-07-13 19:34:05,272 WARN L205 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 484 DAG size of output: 336 [2021-07-13 19:34:06,110 WARN L205 SmtUtils]: Spent 834.00 ms on a formula simplification. DAG size of input: 797 DAG size of output: 520 [2021-07-13 19:34:07,466 WARN L205 SmtUtils]: Spent 971.00 ms on a formula simplification. DAG size of input: 867 DAG size of output: 562 [2021-07-13 19:34:08,516 WARN L205 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 898 DAG size of output: 565 [2021-07-13 19:34:10,748 WARN L205 SmtUtils]: Spent 2.23 s on a formula simplification. DAG size of input: 1765 DAG size of output: 1009 [2021-07-13 19:34:12,977 WARN L205 SmtUtils]: Spent 2.22 s on a formula simplification. DAG size of input: 1765 DAG size of output: 1009 [2021-07-13 19:34:15,388 WARN L205 SmtUtils]: Spent 2.41 s on a formula simplification. DAG size of input: 1772 DAG size of output: 1016 [2021-07-13 19:34:18,009 WARN L205 SmtUtils]: Spent 2.61 s on a formula simplification. DAG size of input: 1018 DAG size of output: 1191 [2021-07-13 19:34:18,326 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 600 DAG size of output: 698 [2021-07-13 19:34:18,903 WARN L205 SmtUtils]: Spent 572.00 ms on a formula simplification. DAG size of input: 597 DAG size of output: 575 [2021-07-13 19:34:19,148 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 535 DAG size of output: 518 [2021-07-13 19:34:20,090 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 360 DAG size of output: 241 [2021-07-13 19:34:20,267 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 406 DAG size of output: 268 [2021-07-13 19:34:20,518 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 510 DAG size of output: 370 [2021-07-13 19:34:20,777 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 510 DAG size of output: 370 [2021-07-13 19:34:21,003 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 512 DAG size of output: 334 [2021-07-13 19:34:21,846 WARN L205 SmtUtils]: Spent 517.00 ms on a formula simplification. DAG size of input: 789 DAG size of output: 336 [2021-07-13 19:34:22,645 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 421 DAG size of output: 247 [2021-07-13 19:34:22,756 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 421 DAG size of output: 247 [2021-07-13 19:34:22,879 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 425 DAG size of output: 252 [2021-07-13 19:34:22,991 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 253 [2021-07-13 19:34:23,814 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:34:23,815 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:34:23,815 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:34:23,816 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-07-13 19:34:23,821 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:23,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568416715] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:23,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:23,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-07-13 19:34:23,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105256263] [2021-07-13 19:34:23,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:34:23,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:23,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:34:23,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:34:23,822 INFO L87 Difference]: Start difference. First operand 1892 states and 6438 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:24,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:24,138 INFO L93 Difference]: Finished difference Result 2152 states and 7005 transitions. [2021-07-13 19:34:24,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:34:24,138 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:34:24,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:24,142 INFO L225 Difference]: With dead ends: 2152 [2021-07-13 19:34:24,142 INFO L226 Difference]: Without dead ends: 2149 [2021-07-13 19:34:24,142 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 296.7ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:34:24,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2149 states. [2021-07-13 19:34:24,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2149 to 1999. [2021-07-13 19:34:24,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1999 states, 1998 states have (on average 3.403903903903904) internal successors, (6801), 1998 states have internal predecessors, (6801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:24,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1999 states to 1999 states and 6801 transitions. [2021-07-13 19:34:24,177 INFO L78 Accepts]: Start accepts. Automaton has 1999 states and 6801 transitions. Word has length 21 [2021-07-13 19:34:24,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:24,177 INFO L482 AbstractCegarLoop]: Abstraction has 1999 states and 6801 transitions. [2021-07-13 19:34:24,177 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:24,177 INFO L276 IsEmpty]: Start isEmpty. Operand 1999 states and 6801 transitions. [2021-07-13 19:34:24,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:34:24,180 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:24,181 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:24,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19836,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:24,397 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:24,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:24,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1614345671, now seen corresponding path program 80 times [2021-07-13 19:34:24,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:24,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144744509] [2021-07-13 19:34:24,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:24,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:24,509 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 45 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:24,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:24,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144744509] [2021-07-13 19:34:24,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144744509] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:24,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540720636] [2021-07-13 19:34:24,510 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 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 [2021-07-13 19:34:24,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:34:24,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:24,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:34:24,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:24,597 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 55 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:24,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540720636] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:24,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:24,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-13 19:34:24,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866157346] [2021-07-13 19:34:24,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:34:24,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:24,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:34:24,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:34:24,598 INFO L87 Difference]: Start difference. First operand 1999 states and 6801 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:24,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:24,798 INFO L93 Difference]: Finished difference Result 2169 states and 6986 transitions. [2021-07-13 19:34:24,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:34:24,799 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:34:24,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:24,802 INFO L225 Difference]: With dead ends: 2169 [2021-07-13 19:34:24,802 INFO L226 Difference]: Without dead ends: 2169 [2021-07-13 19:34:24,802 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 208.9ms TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:34:24,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2169 states. [2021-07-13 19:34:24,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2169 to 1932. [2021-07-13 19:34:24,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1932 states, 1931 states have (on average 3.3858104609010877) internal successors, (6538), 1931 states have internal predecessors, (6538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:24,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1932 states to 1932 states and 6538 transitions. [2021-07-13 19:34:24,827 INFO L78 Accepts]: Start accepts. Automaton has 1932 states and 6538 transitions. Word has length 22 [2021-07-13 19:34:24,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:24,828 INFO L482 AbstractCegarLoop]: Abstraction has 1932 states and 6538 transitions. [2021-07-13 19:34:24,828 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:24,828 INFO L276 IsEmpty]: Start isEmpty. Operand 1932 states and 6538 transitions. [2021-07-13 19:34:24,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:34:24,830 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:24,830 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:25,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21446 [2021-07-13 19:34:25,031 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:25,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:25,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1020889444, now seen corresponding path program 81 times [2021-07-13 19:34:25,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:25,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434495399] [2021-07-13 19:34:25,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:25,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:25,138 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:25,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:25,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434495399] [2021-07-13 19:34:25,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434495399] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:25,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091734801] [2021-07-13 19:34:25,138 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 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 [2021-07-13 19:34:25,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 19:34:25,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:25,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:34:25,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:25,220 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:25,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091734801] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:25,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:25,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-13 19:34:25,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550554408] [2021-07-13 19:34:25,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:34:25,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:25,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:34:25,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:34:25,222 INFO L87 Difference]: Start difference. First operand 1932 states and 6538 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:25,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:25,530 INFO L93 Difference]: Finished difference Result 2262 states and 7074 transitions. [2021-07-13 19:34:25,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 19:34:25,530 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:34:25,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:25,534 INFO L225 Difference]: With dead ends: 2262 [2021-07-13 19:34:25,534 INFO L226 Difference]: Without dead ends: 2255 [2021-07-13 19:34:25,534 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 283.3ms TimeCoverageRelationStatistics Valid=476, Invalid=930, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 19:34:25,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2255 states. [2021-07-13 19:34:25,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2255 to 1969. [2021-07-13 19:34:25,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1969 states, 1968 states have (on average 3.374491869918699) internal successors, (6641), 1968 states have internal predecessors, (6641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:25,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1969 states to 1969 states and 6641 transitions. [2021-07-13 19:34:25,576 INFO L78 Accepts]: Start accepts. Automaton has 1969 states and 6641 transitions. Word has length 22 [2021-07-13 19:34:25,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:25,577 INFO L482 AbstractCegarLoop]: Abstraction has 1969 states and 6641 transitions. [2021-07-13 19:34:25,577 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:25,578 INFO L276 IsEmpty]: Start isEmpty. Operand 1969 states and 6641 transitions. [2021-07-13 19:34:25,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:34:25,581 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:25,582 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:25,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21447 [2021-07-13 19:34:25,802 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:25,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:25,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1440007587, now seen corresponding path program 82 times [2021-07-13 19:34:25,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:25,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100383898] [2021-07-13 19:34:25,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:25,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:25,893 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 47 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:25,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:25,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100383898] [2021-07-13 19:34:25,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100383898] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:25,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642432173] [2021-07-13 19:34:25,893 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 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 [2021-07-13 19:34:25,918 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:34:25,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:25,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:34:25,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:25,953 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 56 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:25,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642432173] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:25,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:25,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:34:25,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362880363] [2021-07-13 19:34:25,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:34:25,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:25,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:34:25,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:34:25,954 INFO L87 Difference]: Start difference. First operand 1969 states and 6641 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:26,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:26,109 INFO L93 Difference]: Finished difference Result 2016 states and 6708 transitions. [2021-07-13 19:34:26,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:34:26,109 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:34:26,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:26,112 INFO L225 Difference]: With dead ends: 2016 [2021-07-13 19:34:26,113 INFO L226 Difference]: Without dead ends: 2015 [2021-07-13 19:34:26,113 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 142.7ms TimeCoverageRelationStatistics Valid=237, Invalid=413, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:34:26,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2015 states. [2021-07-13 19:34:26,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2015 to 1969. [2021-07-13 19:34:26,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1969 states, 1968 states have (on average 3.3719512195121952) internal successors, (6636), 1968 states have internal predecessors, (6636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:26,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1969 states to 1969 states and 6636 transitions. [2021-07-13 19:34:26,137 INFO L78 Accepts]: Start accepts. Automaton has 1969 states and 6636 transitions. Word has length 22 [2021-07-13 19:34:26,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:26,137 INFO L482 AbstractCegarLoop]: Abstraction has 1969 states and 6636 transitions. [2021-07-13 19:34:26,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:26,138 INFO L276 IsEmpty]: Start isEmpty. Operand 1969 states and 6636 transitions. [2021-07-13 19:34:26,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:34:26,140 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:26,141 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:26,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21448,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:26,341 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:26,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:26,341 INFO L82 PathProgramCache]: Analyzing trace with hash -517588854, now seen corresponding path program 83 times [2021-07-13 19:34:26,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:26,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801217949] [2021-07-13 19:34:26,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:26,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:26,421 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:26,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:26,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801217949] [2021-07-13 19:34:26,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801217949] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:26,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354593343] [2021-07-13 19:34:26,422 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 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 [2021-07-13 19:34:26,449 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:34:26,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:26,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:34:26,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:26,490 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:26,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354593343] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:26,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:26,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:34:26,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728826479] [2021-07-13 19:34:26,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:34:26,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:26,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:34:26,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:34:26,491 INFO L87 Difference]: Start difference. First operand 1969 states and 6636 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:26,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:26,557 INFO L93 Difference]: Finished difference Result 2320 states and 7225 transitions. [2021-07-13 19:34:26,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:34:26,557 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:34:26,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:26,560 INFO L225 Difference]: With dead ends: 2320 [2021-07-13 19:34:26,560 INFO L226 Difference]: Without dead ends: 2320 [2021-07-13 19:34:26,561 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 77.3ms TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:34:26,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2320 states. [2021-07-13 19:34:26,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2320 to 1919. [2021-07-13 19:34:26,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1919 states, 1918 states have (on average 3.3628779979144943) internal successors, (6450), 1918 states have internal predecessors, (6450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:26,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1919 states to 1919 states and 6450 transitions. [2021-07-13 19:34:26,586 INFO L78 Accepts]: Start accepts. Automaton has 1919 states and 6450 transitions. Word has length 22 [2021-07-13 19:34:26,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:26,586 INFO L482 AbstractCegarLoop]: Abstraction has 1919 states and 6450 transitions. [2021-07-13 19:34:26,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:26,586 INFO L276 IsEmpty]: Start isEmpty. Operand 1919 states and 6450 transitions. [2021-07-13 19:34:26,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:34:26,589 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:26,589 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:26,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21449 [2021-07-13 19:34:26,790 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:26,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:26,790 INFO L82 PathProgramCache]: Analyzing trace with hash -408136825, now seen corresponding path program 84 times [2021-07-13 19:34:26,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:26,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993617797] [2021-07-13 19:34:26,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:26,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:26,886 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:26,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:26,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993617797] [2021-07-13 19:34:26,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993617797] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:26,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505535904] [2021-07-13 19:34:26,887 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:34:26,915 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 19:34:26,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:26,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:34:26,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:26,958 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 37 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:34:26,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505535904] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:26,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:26,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:34:26,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618366861] [2021-07-13 19:34:26,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:34:26,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:26,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:34:26,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:34:26,959 INFO L87 Difference]: Start difference. First operand 1919 states and 6450 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:27,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:27,101 INFO L93 Difference]: Finished difference Result 2210 states and 6903 transitions. [2021-07-13 19:34:27,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:34:27,101 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:34:27,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:27,104 INFO L225 Difference]: With dead ends: 2210 [2021-07-13 19:34:27,104 INFO L226 Difference]: Without dead ends: 2210 [2021-07-13 19:34:27,105 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 144.8ms TimeCoverageRelationStatistics Valid=210, Invalid=342, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:34:27,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2210 states. [2021-07-13 19:34:27,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2210 to 1916. [2021-07-13 19:34:27,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1916 states, 1915 states have (on average 3.3383812010443865) internal successors, (6393), 1915 states have internal predecessors, (6393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:27,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1916 states to 1916 states and 6393 transitions. [2021-07-13 19:34:27,130 INFO L78 Accepts]: Start accepts. Automaton has 1916 states and 6393 transitions. Word has length 22 [2021-07-13 19:34:27,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:27,130 INFO L482 AbstractCegarLoop]: Abstraction has 1916 states and 6393 transitions. [2021-07-13 19:34:27,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:27,130 INFO L276 IsEmpty]: Start isEmpty. Operand 1916 states and 6393 transitions. [2021-07-13 19:34:27,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:34:27,133 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:27,133 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:27,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21450,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:27,333 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:27,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:27,334 INFO L82 PathProgramCache]: Analyzing trace with hash 675153308, now seen corresponding path program 85 times [2021-07-13 19:34:27,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:27,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742894951] [2021-07-13 19:34:27,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:27,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:27,425 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:27,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:27,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742894951] [2021-07-13 19:34:27,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742894951] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:27,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129530008] [2021-07-13 19:34:27,425 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 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 [2021-07-13 19:34:27,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:27,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:34:27,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:27,500 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:34:27,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129530008] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:27,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:27,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:34:27,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186041133] [2021-07-13 19:34:27,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:34:27,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:27,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:34:27,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=118, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:34:27,501 INFO L87 Difference]: Start difference. First operand 1916 states and 6393 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:27,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:27,703 INFO L93 Difference]: Finished difference Result 2207 states and 6832 transitions. [2021-07-13 19:34:27,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:34:27,704 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:34:27,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:27,709 INFO L225 Difference]: With dead ends: 2207 [2021-07-13 19:34:27,709 INFO L226 Difference]: Without dead ends: 2205 [2021-07-13 19:34:27,709 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 165.7ms TimeCoverageRelationStatistics Valid=246, Invalid=404, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:34:27,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2205 states. [2021-07-13 19:34:27,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2205 to 1928. [2021-07-13 19:34:27,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1928 states, 1927 states have (on average 3.3388687078360144) internal successors, (6434), 1927 states have internal predecessors, (6434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:27,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 6434 transitions. [2021-07-13 19:34:27,776 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 6434 transitions. Word has length 22 [2021-07-13 19:34:27,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:27,776 INFO L482 AbstractCegarLoop]: Abstraction has 1928 states and 6434 transitions. [2021-07-13 19:34:27,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:27,776 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 6434 transitions. [2021-07-13 19:34:27,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:34:27,780 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:27,780 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:27,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21451 [2021-07-13 19:34:27,989 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:27,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:27,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1331955485, now seen corresponding path program 86 times [2021-07-13 19:34:27,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:27,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60928094] [2021-07-13 19:34:27,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:27,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:28,079 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 39 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:28,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:28,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60928094] [2021-07-13 19:34:28,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60928094] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:28,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776281304] [2021-07-13 19:34:28,080 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 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 [2021-07-13 19:34:28,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:34:28,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:28,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:34:28,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:28,152 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 47 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:28,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776281304] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:28,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:28,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:34:28,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834536641] [2021-07-13 19:34:28,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:34:28,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:28,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:34:28,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:34:28,154 INFO L87 Difference]: Start difference. First operand 1928 states and 6434 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:28,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:28,367 INFO L93 Difference]: Finished difference Result 2091 states and 6657 transitions. [2021-07-13 19:34:28,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:34:28,368 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:34:28,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:28,371 INFO L225 Difference]: With dead ends: 2091 [2021-07-13 19:34:28,371 INFO L226 Difference]: Without dead ends: 2089 [2021-07-13 19:34:28,371 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 143.4ms TimeCoverageRelationStatistics Valid=238, Invalid=412, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:34:28,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2021-07-13 19:34:28,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 1892. [2021-07-13 19:34:28,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1892 states, 1891 states have (on average 3.3400317292437864) internal successors, (6316), 1891 states have internal predecessors, (6316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:28,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1892 states to 1892 states and 6316 transitions. [2021-07-13 19:34:28,395 INFO L78 Accepts]: Start accepts. Automaton has 1892 states and 6316 transitions. Word has length 22 [2021-07-13 19:34:28,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:28,396 INFO L482 AbstractCegarLoop]: Abstraction has 1892 states and 6316 transitions. [2021-07-13 19:34:28,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:28,396 INFO L276 IsEmpty]: Start isEmpty. Operand 1892 states and 6316 transitions. [2021-07-13 19:34:28,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:34:28,398 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:28,398 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:28,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21452 [2021-07-13 19:34:28,599 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:28,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:28,599 INFO L82 PathProgramCache]: Analyzing trace with hash -2040593078, now seen corresponding path program 87 times [2021-07-13 19:34:28,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:28,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286597915] [2021-07-13 19:34:28,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:28,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:28,691 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:28,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:28,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286597915] [2021-07-13 19:34:28,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286597915] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:28,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563433545] [2021-07-13 19:34:28,691 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 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 [2021-07-13 19:34:28,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 19:34:28,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:28,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:34:28,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:28,759 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:28,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563433545] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:28,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:28,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:34:28,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018541425] [2021-07-13 19:34:28,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:34:28,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:28,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:34:28,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=118, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:34:28,760 INFO L87 Difference]: Start difference. First operand 1892 states and 6316 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:28,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:28,832 INFO L93 Difference]: Finished difference Result 2273 states and 6960 transitions. [2021-07-13 19:34:28,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:34:28,832 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:34:28,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:28,836 INFO L225 Difference]: With dead ends: 2273 [2021-07-13 19:34:28,836 INFO L226 Difference]: Without dead ends: 2273 [2021-07-13 19:34:28,836 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 79.9ms TimeCoverageRelationStatistics Valid=106, Invalid=134, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:34:28,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2273 states. [2021-07-13 19:34:28,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2273 to 1896. [2021-07-13 19:34:28,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1896 states, 1895 states have (on average 3.3393139841688653) internal successors, (6328), 1895 states have internal predecessors, (6328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:28,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1896 states to 1896 states and 6328 transitions. [2021-07-13 19:34:28,861 INFO L78 Accepts]: Start accepts. Automaton has 1896 states and 6328 transitions. Word has length 22 [2021-07-13 19:34:28,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:28,861 INFO L482 AbstractCegarLoop]: Abstraction has 1896 states and 6328 transitions. [2021-07-13 19:34:28,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:28,862 INFO L276 IsEmpty]: Start isEmpty. Operand 1896 states and 6328 transitions. [2021-07-13 19:34:28,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:34:28,865 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:28,865 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:29,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21453,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:29,067 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:29,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:29,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1252398503, now seen corresponding path program 88 times [2021-07-13 19:34:29,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:29,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750251070] [2021-07-13 19:34:29,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:29,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:29,158 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:29,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:29,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750251070] [2021-07-13 19:34:29,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750251070] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:29,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511204722] [2021-07-13 19:34:29,159 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 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 [2021-07-13 19:34:29,197 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:34:29,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:29,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:34:29,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:29,245 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 48 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:29,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511204722] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:29,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:29,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-13 19:34:29,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981247466] [2021-07-13 19:34:29,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:34:29,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:29,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:34:29,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:34:29,246 INFO L87 Difference]: Start difference. First operand 1896 states and 6328 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:29,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:29,450 INFO L93 Difference]: Finished difference Result 2019 states and 6507 transitions. [2021-07-13 19:34:29,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:34:29,450 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:34:29,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:29,454 INFO L225 Difference]: With dead ends: 2019 [2021-07-13 19:34:29,454 INFO L226 Difference]: Without dead ends: 2017 [2021-07-13 19:34:29,454 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 155.8ms TimeCoverageRelationStatistics Valid=267, Invalid=489, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:34:29,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2017 states. [2021-07-13 19:34:29,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2017 to 1896. [2021-07-13 19:34:29,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1896 states, 1895 states have (on average 3.3366754617414247) internal successors, (6323), 1895 states have internal predecessors, (6323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:29,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1896 states to 1896 states and 6323 transitions. [2021-07-13 19:34:29,477 INFO L78 Accepts]: Start accepts. Automaton has 1896 states and 6323 transitions. Word has length 22 [2021-07-13 19:34:29,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:29,477 INFO L482 AbstractCegarLoop]: Abstraction has 1896 states and 6323 transitions. [2021-07-13 19:34:29,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:29,477 INFO L276 IsEmpty]: Start isEmpty. Operand 1896 states and 6323 transitions. [2021-07-13 19:34:29,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:34:29,479 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:29,479 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:29,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21454,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:29,680 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:29,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:29,680 INFO L82 PathProgramCache]: Analyzing trace with hash 525326884, now seen corresponding path program 89 times [2021-07-13 19:34:29,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:29,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296503777] [2021-07-13 19:34:29,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:29,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:29,770 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:29,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:29,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296503777] [2021-07-13 19:34:29,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296503777] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:29,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705283758] [2021-07-13 19:34:29,771 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 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 [2021-07-13 19:34:29,805 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:34:29,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:29,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:34:29,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:29,861 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:29,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705283758] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:29,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:29,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-13 19:34:29,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627253514] [2021-07-13 19:34:29,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:34:29,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:29,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:34:29,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:34:29,862 INFO L87 Difference]: Start difference. First operand 1896 states and 6323 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:29,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:29,969 INFO L93 Difference]: Finished difference Result 2414 states and 7311 transitions. [2021-07-13 19:34:29,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:34:29,970 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:34:29,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:29,975 INFO L225 Difference]: With dead ends: 2414 [2021-07-13 19:34:29,975 INFO L226 Difference]: Without dead ends: 2414 [2021-07-13 19:34:29,976 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 106.7ms TimeCoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:34:29,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2414 states. [2021-07-13 19:34:30,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2414 to 1844. [2021-07-13 19:34:30,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1844 states, 1843 states have (on average 3.3266413456321215) internal successors, (6131), 1843 states have internal predecessors, (6131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:30,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1844 states to 1844 states and 6131 transitions. [2021-07-13 19:34:30,016 INFO L78 Accepts]: Start accepts. Automaton has 1844 states and 6131 transitions. Word has length 22 [2021-07-13 19:34:30,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:30,016 INFO L482 AbstractCegarLoop]: Abstraction has 1844 states and 6131 transitions. [2021-07-13 19:34:30,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:30,016 INFO L276 IsEmpty]: Start isEmpty. Operand 1844 states and 6131 transitions. [2021-07-13 19:34:30,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:34:30,020 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:30,020 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:30,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21455 [2021-07-13 19:34:30,233 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:30,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:30,233 INFO L82 PathProgramCache]: Analyzing trace with hash -376627513, now seen corresponding path program 90 times [2021-07-13 19:34:30,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:30,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026353830] [2021-07-13 19:34:30,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:30,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:30,308 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:30,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:30,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026353830] [2021-07-13 19:34:30,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026353830] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:30,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931434300] [2021-07-13 19:34:30,308 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 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 [2021-07-13 19:34:30,335 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 19:34:30,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:30,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:34:30,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:30,377 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 31 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:34:30,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931434300] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:30,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:30,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:34:30,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294941962] [2021-07-13 19:34:30,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:34:30,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:30,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:34:30,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:34:30,378 INFO L87 Difference]: Start difference. First operand 1844 states and 6131 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:30,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:30,502 INFO L93 Difference]: Finished difference Result 2122 states and 6550 transitions. [2021-07-13 19:34:30,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:34:30,502 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:34:30,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:30,505 INFO L225 Difference]: With dead ends: 2122 [2021-07-13 19:34:30,505 INFO L226 Difference]: Without dead ends: 2122 [2021-07-13 19:34:30,505 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 115.7ms TimeCoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:34:30,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2122 states. [2021-07-13 19:34:30,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2122 to 1806. [2021-07-13 19:34:30,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1806 states, 1805 states have (on average 3.301939058171745) internal successors, (5960), 1805 states have internal predecessors, (5960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:30,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1806 states to 1806 states and 5960 transitions. [2021-07-13 19:34:30,529 INFO L78 Accepts]: Start accepts. Automaton has 1806 states and 5960 transitions. Word has length 22 [2021-07-13 19:34:30,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:30,529 INFO L482 AbstractCegarLoop]: Abstraction has 1806 states and 5960 transitions. [2021-07-13 19:34:30,529 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:30,529 INFO L276 IsEmpty]: Start isEmpty. Operand 1806 states and 5960 transitions. [2021-07-13 19:34:30,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:34:30,532 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:30,532 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:30,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21456 [2021-07-13 19:34:30,732 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:30,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:30,733 INFO L82 PathProgramCache]: Analyzing trace with hash 706662620, now seen corresponding path program 91 times [2021-07-13 19:34:30,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:30,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169527417] [2021-07-13 19:34:30,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:30,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:30,812 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:30,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:30,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169527417] [2021-07-13 19:34:30,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169527417] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:30,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104889220] [2021-07-13 19:34:30,812 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 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 [2021-07-13 19:34:30,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:30,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:34:30,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:30,884 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 27 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:34:30,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104889220] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:30,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:30,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:34:30,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523467483] [2021-07-13 19:34:30,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:34:30,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:30,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:34:30,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=119, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:34:30,885 INFO L87 Difference]: Start difference. First operand 1806 states and 5960 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:31,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:31,094 INFO L93 Difference]: Finished difference Result 2095 states and 6396 transitions. [2021-07-13 19:34:31,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:34:31,095 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:34:31,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:31,098 INFO L225 Difference]: With dead ends: 2095 [2021-07-13 19:34:31,098 INFO L226 Difference]: Without dead ends: 2093 [2021-07-13 19:34:31,098 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 164.7ms TimeCoverageRelationStatistics Valid=245, Invalid=405, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:34:31,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2093 states. [2021-07-13 19:34:31,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2093 to 1820. [2021-07-13 19:34:31,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1820 states, 1819 states have (on average 3.302363936228697) internal successors, (6007), 1819 states have internal predecessors, (6007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:31,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1820 states to 1820 states and 6007 transitions. [2021-07-13 19:34:31,122 INFO L78 Accepts]: Start accepts. Automaton has 1820 states and 6007 transitions. Word has length 22 [2021-07-13 19:34:31,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:31,123 INFO L482 AbstractCegarLoop]: Abstraction has 1820 states and 6007 transitions. [2021-07-13 19:34:31,123 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:31,123 INFO L276 IsEmpty]: Start isEmpty. Operand 1820 states and 6007 transitions. [2021-07-13 19:34:31,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:34:31,125 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:31,125 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:31,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21457 [2021-07-13 19:34:31,341 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:31,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:31,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1363464797, now seen corresponding path program 92 times [2021-07-13 19:34:31,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:31,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569211106] [2021-07-13 19:34:31,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:31,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:31,421 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:31,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:31,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569211106] [2021-07-13 19:34:31,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569211106] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:31,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784849780] [2021-07-13 19:34:31,422 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 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 [2021-07-13 19:34:31,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:34:31,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:31,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:34:31,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:31,482 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:31,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784849780] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:31,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:31,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:34:31,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994054649] [2021-07-13 19:34:31,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:34:31,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:31,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:34:31,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:34:31,483 INFO L87 Difference]: Start difference. First operand 1820 states and 6007 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:31,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:31,658 INFO L93 Difference]: Finished difference Result 1994 states and 6249 transitions. [2021-07-13 19:34:31,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:34:31,658 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:34:31,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:31,661 INFO L225 Difference]: With dead ends: 1994 [2021-07-13 19:34:31,661 INFO L226 Difference]: Without dead ends: 1992 [2021-07-13 19:34:31,661 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 132.4ms TimeCoverageRelationStatistics Valid=239, Invalid=411, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:34:31,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1992 states. [2021-07-13 19:34:31,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1992 to 1813. [2021-07-13 19:34:31,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1813 states, 1812 states have (on average 3.3002207505518766) internal successors, (5980), 1812 states have internal predecessors, (5980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:31,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1813 states to 1813 states and 5980 transitions. [2021-07-13 19:34:31,686 INFO L78 Accepts]: Start accepts. Automaton has 1813 states and 5980 transitions. Word has length 22 [2021-07-13 19:34:31,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:31,686 INFO L482 AbstractCegarLoop]: Abstraction has 1813 states and 5980 transitions. [2021-07-13 19:34:31,686 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:31,686 INFO L276 IsEmpty]: Start isEmpty. Operand 1813 states and 5980 transitions. [2021-07-13 19:34:31,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:34:31,689 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:31,689 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:31,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21458 [2021-07-13 19:34:31,889 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:31,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:31,890 INFO L82 PathProgramCache]: Analyzing trace with hash -2009083766, now seen corresponding path program 93 times [2021-07-13 19:34:31,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:31,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983384531] [2021-07-13 19:34:31,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:31,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:31,976 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:31,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:31,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983384531] [2021-07-13 19:34:31,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983384531] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:31,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131343206] [2021-07-13 19:34:31,977 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 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 [2021-07-13 19:34:32,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 19:34:32,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:32,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:34:32,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:32,062 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:32,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131343206] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:32,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:32,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:34:32,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543393557] [2021-07-13 19:34:32,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:34:32,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:32,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:34:32,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=119, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:34:32,064 INFO L87 Difference]: Start difference. First operand 1813 states and 5980 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:32,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:32,145 INFO L93 Difference]: Finished difference Result 2201 states and 6640 transitions. [2021-07-13 19:34:32,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:34:32,145 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:34:32,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:32,148 INFO L225 Difference]: With dead ends: 2201 [2021-07-13 19:34:32,148 INFO L226 Difference]: Without dead ends: 2201 [2021-07-13 19:34:32,149 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 78.5ms TimeCoverageRelationStatistics Valid=105, Invalid=135, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:34:32,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2201 states. [2021-07-13 19:34:32,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2201 to 1816. [2021-07-13 19:34:32,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1816 states, 1815 states have (on average 3.299724517906336) internal successors, (5989), 1815 states have internal predecessors, (5989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:32,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 5989 transitions. [2021-07-13 19:34:32,174 INFO L78 Accepts]: Start accepts. Automaton has 1816 states and 5989 transitions. Word has length 22 [2021-07-13 19:34:32,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:32,174 INFO L482 AbstractCegarLoop]: Abstraction has 1816 states and 5989 transitions. [2021-07-13 19:34:32,174 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:32,174 INFO L276 IsEmpty]: Start isEmpty. Operand 1816 states and 5989 transitions. [2021-07-13 19:34:32,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:34:32,176 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:32,176 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:32,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21459,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:32,377 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:32,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:32,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1220889191, now seen corresponding path program 94 times [2021-07-13 19:34:32,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:32,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977531418] [2021-07-13 19:34:32,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:32,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:32,466 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:32,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:32,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977531418] [2021-07-13 19:34:32,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977531418] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:32,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308343664] [2021-07-13 19:34:32,467 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 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 [2021-07-13 19:34:32,497 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:34:32,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:32,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:34:32,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:32,545 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:32,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308343664] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:32,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:32,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-13 19:34:32,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469524280] [2021-07-13 19:34:32,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:34:32,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:32,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:34:32,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:34:32,546 INFO L87 Difference]: Start difference. First operand 1816 states and 5989 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:32,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:32,779 INFO L93 Difference]: Finished difference Result 1990 states and 6234 transitions. [2021-07-13 19:34:32,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:34:32,780 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:34:32,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:32,783 INFO L225 Difference]: With dead ends: 1990 [2021-07-13 19:34:32,783 INFO L226 Difference]: Without dead ends: 1988 [2021-07-13 19:34:32,783 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 164.2ms TimeCoverageRelationStatistics Valid=268, Invalid=488, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:34:32,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1988 states. [2021-07-13 19:34:32,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1988 to 1816. [2021-07-13 19:34:32,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1816 states, 1815 states have (on average 3.296969696969697) internal successors, (5984), 1815 states have internal predecessors, (5984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:32,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 5984 transitions. [2021-07-13 19:34:32,806 INFO L78 Accepts]: Start accepts. Automaton has 1816 states and 5984 transitions. Word has length 22 [2021-07-13 19:34:32,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:32,806 INFO L482 AbstractCegarLoop]: Abstraction has 1816 states and 5984 transitions. [2021-07-13 19:34:32,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:32,806 INFO L276 IsEmpty]: Start isEmpty. Operand 1816 states and 5984 transitions. [2021-07-13 19:34:32,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:34:32,809 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:32,809 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:33,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21460,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:33,009 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:33,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:33,010 INFO L82 PathProgramCache]: Analyzing trace with hash 556836196, now seen corresponding path program 95 times [2021-07-13 19:34:33,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:33,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371399524] [2021-07-13 19:34:33,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:33,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:33,084 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:33,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:33,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371399524] [2021-07-13 19:34:33,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371399524] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:33,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677341910] [2021-07-13 19:34:33,085 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 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 [2021-07-13 19:34:33,112 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:34:33,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:33,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:34:33,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:33,159 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:33,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677341910] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:33,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:33,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-13 19:34:33,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771921467] [2021-07-13 19:34:33,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:34:33,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:33,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:34:33,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:34:33,160 INFO L87 Difference]: Start difference. First operand 1816 states and 5984 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:33,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:33,251 INFO L93 Difference]: Finished difference Result 2351 states and 6997 transitions. [2021-07-13 19:34:33,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:34:33,252 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:34:33,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:33,256 INFO L225 Difference]: With dead ends: 2351 [2021-07-13 19:34:33,256 INFO L226 Difference]: Without dead ends: 2351 [2021-07-13 19:34:33,256 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 85.8ms TimeCoverageRelationStatistics Valid=139, Invalid=203, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:34:33,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2351 states. [2021-07-13 19:34:33,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2351 to 1778. [2021-07-13 19:34:33,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1778 states, 1777 states have (on average 3.2830613393359593) internal successors, (5834), 1777 states have internal predecessors, (5834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:33,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1778 states to 1778 states and 5834 transitions. [2021-07-13 19:34:33,288 INFO L78 Accepts]: Start accepts. Automaton has 1778 states and 5834 transitions. Word has length 22 [2021-07-13 19:34:33,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:33,288 INFO L482 AbstractCegarLoop]: Abstraction has 1778 states and 5834 transitions. [2021-07-13 19:34:33,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:33,288 INFO L276 IsEmpty]: Start isEmpty. Operand 1778 states and 5834 transitions. [2021-07-13 19:34:33,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:34:33,291 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:33,291 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:33,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21461 [2021-07-13 19:34:33,492 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:33,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:33,493 INFO L82 PathProgramCache]: Analyzing trace with hash 268515805, now seen corresponding path program 96 times [2021-07-13 19:34:33,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:33,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062228249] [2021-07-13 19:34:33,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:33,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:33,567 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:33,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:33,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062228249] [2021-07-13 19:34:33,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062228249] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:33,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127650392] [2021-07-13 19:34:33,568 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 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 [2021-07-13 19:34:33,594 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 19:34:33,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:33,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:34:33,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:33,634 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 42 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:33,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127650392] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:33,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:33,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-13 19:34:33,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270946662] [2021-07-13 19:34:33,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:34:33,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:33,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:34:33,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:34:33,635 INFO L87 Difference]: Start difference. First operand 1778 states and 5834 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:33,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:33,823 INFO L93 Difference]: Finished difference Result 1995 states and 6375 transitions. [2021-07-13 19:34:33,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:34:33,824 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:34:33,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:33,827 INFO L225 Difference]: With dead ends: 1995 [2021-07-13 19:34:33,827 INFO L226 Difference]: Without dead ends: 1992 [2021-07-13 19:34:33,827 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 154.5ms TimeCoverageRelationStatistics Valid=259, Invalid=497, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:34:33,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1992 states. [2021-07-13 19:34:33,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1992 to 1782. [2021-07-13 19:34:33,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1782 states, 1781 states have (on average 3.2824256035934867) internal successors, (5846), 1781 states have internal predecessors, (5846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:33,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1782 states to 1782 states and 5846 transitions. [2021-07-13 19:34:33,852 INFO L78 Accepts]: Start accepts. Automaton has 1782 states and 5846 transitions. Word has length 22 [2021-07-13 19:34:33,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:33,852 INFO L482 AbstractCegarLoop]: Abstraction has 1782 states and 5846 transitions. [2021-07-13 19:34:33,852 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:33,852 INFO L276 IsEmpty]: Start isEmpty. Operand 1782 states and 5846 transitions. [2021-07-13 19:34:33,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:34:33,854 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:33,854 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:34,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21462 [2021-07-13 19:34:34,055 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:34,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:34,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1504023606, now seen corresponding path program 97 times [2021-07-13 19:34:34,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:34,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337796508] [2021-07-13 19:34:34,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:34,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:34,142 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:34,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:34,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337796508] [2021-07-13 19:34:34,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337796508] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:34,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746765987] [2021-07-13 19:34:34,142 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 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 [2021-07-13 19:34:34,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:34,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:34:34,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:34,233 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:34,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746765987] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:34,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:34,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-13 19:34:34,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877531372] [2021-07-13 19:34:34,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:34:34,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:34,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:34:34,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:34:34,234 INFO L87 Difference]: Start difference. First operand 1782 states and 5846 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:34,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:34,352 INFO L93 Difference]: Finished difference Result 3202 states and 10128 transitions. [2021-07-13 19:34:34,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:34:34,352 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:34:34,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:34,357 INFO L225 Difference]: With dead ends: 3202 [2021-07-13 19:34:34,357 INFO L226 Difference]: Without dead ends: 3202 [2021-07-13 19:34:34,358 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 126.5ms TimeCoverageRelationStatistics Valid=178, Invalid=284, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:34:34,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3202 states. [2021-07-13 19:34:34,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3202 to 2517. [2021-07-13 19:34:34,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2517 states, 2516 states have (on average 3.433227344992051) internal successors, (8638), 2516 states have internal predecessors, (8638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:34,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2517 states to 2517 states and 8638 transitions. [2021-07-13 19:34:34,395 INFO L78 Accepts]: Start accepts. Automaton has 2517 states and 8638 transitions. Word has length 22 [2021-07-13 19:34:34,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:34,396 INFO L482 AbstractCegarLoop]: Abstraction has 2517 states and 8638 transitions. [2021-07-13 19:34:34,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:34,396 INFO L276 IsEmpty]: Start isEmpty. Operand 2517 states and 8638 transitions. [2021-07-13 19:34:34,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:34:34,398 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:34,398 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:34,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21463,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:34,599 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:34,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:34,599 INFO L82 PathProgramCache]: Analyzing trace with hash 600161159, now seen corresponding path program 98 times [2021-07-13 19:34:34,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:34,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391913184] [2021-07-13 19:34:34,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:34,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:34,689 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 21 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:34,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:34,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391913184] [2021-07-13 19:34:34,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391913184] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:34,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813304621] [2021-07-13 19:34:34,689 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 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 [2021-07-13 19:34:34,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:34:34,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:34,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:34:34,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:34,763 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:34:34,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813304621] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:34,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:34,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:34:34,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978092434] [2021-07-13 19:34:34,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:34:34,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:34,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:34:34,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:34:34,764 INFO L87 Difference]: Start difference. First operand 2517 states and 8638 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:34,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:34,882 INFO L93 Difference]: Finished difference Result 2785 states and 8985 transitions. [2021-07-13 19:34:34,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:34:34,883 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:34:34,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:34,887 INFO L225 Difference]: With dead ends: 2785 [2021-07-13 19:34:34,887 INFO L226 Difference]: Without dead ends: 2785 [2021-07-13 19:34:34,887 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 110.6ms TimeCoverageRelationStatistics Valid=184, Invalid=278, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:34:34,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2785 states. [2021-07-13 19:34:34,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2785 to 2437. [2021-07-13 19:34:34,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2437 states, 2436 states have (on average 3.3973727422003286) internal successors, (8276), 2436 states have internal predecessors, (8276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:34,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2437 states to 2437 states and 8276 transitions. [2021-07-13 19:34:34,921 INFO L78 Accepts]: Start accepts. Automaton has 2437 states and 8276 transitions. Word has length 22 [2021-07-13 19:34:34,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:34,921 INFO L482 AbstractCegarLoop]: Abstraction has 2437 states and 8276 transitions. [2021-07-13 19:34:34,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:34,921 INFO L276 IsEmpty]: Start isEmpty. Operand 2437 states and 8276 transitions. [2021-07-13 19:34:34,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:34:34,923 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:34,923 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:35,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21464 [2021-07-13 19:34:35,124 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:35,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:35,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1683451292, now seen corresponding path program 99 times [2021-07-13 19:34:35,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:35,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090521790] [2021-07-13 19:34:35,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:35,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:35,195 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 28 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:35,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:35,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090521790] [2021-07-13 19:34:35,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090521790] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:35,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005865518] [2021-07-13 19:34:35,195 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 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 [2021-07-13 19:34:35,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 19:34:35,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:35,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:34:35,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:35,265 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:34:35,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005865518] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:35,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:35,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:34:35,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484629783] [2021-07-13 19:34:35,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:34:35,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:35,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:34:35,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:34:35,266 INFO L87 Difference]: Start difference. First operand 2437 states and 8276 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:35,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:35,436 INFO L93 Difference]: Finished difference Result 2747 states and 8798 transitions. [2021-07-13 19:34:35,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:34:35,436 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:34:35,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:35,441 INFO L225 Difference]: With dead ends: 2747 [2021-07-13 19:34:35,441 INFO L226 Difference]: Without dead ends: 2745 [2021-07-13 19:34:35,441 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 134.0ms TimeCoverageRelationStatistics Valid=244, Invalid=406, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:34:35,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2745 states. [2021-07-13 19:34:35,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2745 to 2476. [2021-07-13 19:34:35,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2476 states, 2475 states have (on average 3.3975757575757575) internal successors, (8409), 2475 states have internal predecessors, (8409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:35,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2476 states to 2476 states and 8409 transitions. [2021-07-13 19:34:35,476 INFO L78 Accepts]: Start accepts. Automaton has 2476 states and 8409 transitions. Word has length 22 [2021-07-13 19:34:35,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:35,476 INFO L482 AbstractCegarLoop]: Abstraction has 2476 states and 8409 transitions. [2021-07-13 19:34:35,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:35,476 INFO L276 IsEmpty]: Start isEmpty. Operand 2476 states and 8409 transitions. [2021-07-13 19:34:35,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:34:35,479 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:35,479 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:35,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21465,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:35,680 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:35,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:35,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1954713827, now seen corresponding path program 100 times [2021-07-13 19:34:35,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:35,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343443569] [2021-07-13 19:34:35,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:35,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:35,755 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:35,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:35,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343443569] [2021-07-13 19:34:35,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343443569] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:35,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388907152] [2021-07-13 19:34:35,756 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 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 [2021-07-13 19:34:35,781 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:34:35,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:35,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:34:35,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:35,821 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:35,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388907152] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:35,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:35,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:34:35,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491213228] [2021-07-13 19:34:35,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:34:35,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:35,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:34:35,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:34:35,822 INFO L87 Difference]: Start difference. First operand 2476 states and 8409 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:35,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:35,997 INFO L93 Difference]: Finished difference Result 2659 states and 8666 transitions. [2021-07-13 19:34:35,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:34:35,997 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:34:35,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:36,002 INFO L225 Difference]: With dead ends: 2659 [2021-07-13 19:34:36,002 INFO L226 Difference]: Without dead ends: 2657 [2021-07-13 19:34:36,002 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 127.0ms TimeCoverageRelationStatistics Valid=240, Invalid=410, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:34:36,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2657 states. [2021-07-13 19:34:36,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2657 to 2462. [2021-07-13 19:34:36,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2462 states, 2461 states have (on average 3.3933360422592442) internal successors, (8351), 2461 states have internal predecessors, (8351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:36,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2462 states to 2462 states and 8351 transitions. [2021-07-13 19:34:36,038 INFO L78 Accepts]: Start accepts. Automaton has 2462 states and 8351 transitions. Word has length 22 [2021-07-13 19:34:36,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:36,038 INFO L482 AbstractCegarLoop]: Abstraction has 2462 states and 8351 transitions. [2021-07-13 19:34:36,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:36,038 INFO L276 IsEmpty]: Start isEmpty. Operand 2462 states and 8351 transitions. [2021-07-13 19:34:36,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:34:36,040 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:36,041 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:36,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21466 [2021-07-13 19:34:36,245 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:36,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:36,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1032295094, now seen corresponding path program 101 times [2021-07-13 19:34:36,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:36,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119922828] [2021-07-13 19:34:36,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:36,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:36,323 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 24 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:36,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:36,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119922828] [2021-07-13 19:34:36,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119922828] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:36,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558488396] [2021-07-13 19:34:36,324 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 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 [2021-07-13 19:34:36,356 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:34:36,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:36,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:34:36,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:36,403 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:36,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558488396] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:36,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:36,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:34:36,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120164838] [2021-07-13 19:34:36,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:34:36,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:36,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:34:36,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:34:36,405 INFO L87 Difference]: Start difference. First operand 2462 states and 8351 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:36,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:36,494 INFO L93 Difference]: Finished difference Result 2808 states and 8897 transitions. [2021-07-13 19:34:36,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:34:36,494 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:34:36,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:36,500 INFO L225 Difference]: With dead ends: 2808 [2021-07-13 19:34:36,500 INFO L226 Difference]: Without dead ends: 2808 [2021-07-13 19:34:36,501 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 74.3ms TimeCoverageRelationStatistics Valid=104, Invalid=136, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:34:36,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2808 states. [2021-07-13 19:34:36,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2808 to 2464. [2021-07-13 19:34:36,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2464 states, 2463 states have (on average 3.39301664636622) internal successors, (8357), 2463 states have internal predecessors, (8357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:36,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2464 states to 2464 states and 8357 transitions. [2021-07-13 19:34:36,554 INFO L78 Accepts]: Start accepts. Automaton has 2464 states and 8357 transitions. Word has length 22 [2021-07-13 19:34:36,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:36,554 INFO L482 AbstractCegarLoop]: Abstraction has 2464 states and 8357 transitions. [2021-07-13 19:34:36,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:36,554 INFO L276 IsEmpty]: Start isEmpty. Operand 2464 states and 8357 transitions. [2021-07-13 19:34:36,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:34:36,558 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:36,558 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:36,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21467 [2021-07-13 19:34:36,781 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:36,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:36,781 INFO L82 PathProgramCache]: Analyzing trace with hash -244100519, now seen corresponding path program 102 times [2021-07-13 19:34:36,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:36,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119498275] [2021-07-13 19:34:36,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:36,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:36,851 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:36,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:36,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119498275] [2021-07-13 19:34:36,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119498275] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:36,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361404092] [2021-07-13 19:34:36,851 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 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 [2021-07-13 19:34:36,883 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 19:34:36,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:36,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:34:36,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:36,924 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 34 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:36,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361404092] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:36,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:36,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-13 19:34:36,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785958326] [2021-07-13 19:34:36,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:34:36,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:36,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:34:36,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:34:36,925 INFO L87 Difference]: Start difference. First operand 2464 states and 8357 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:37,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:37,105 INFO L93 Difference]: Finished difference Result 2648 states and 8618 transitions. [2021-07-13 19:34:37,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:34:37,105 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:34:37,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:37,110 INFO L225 Difference]: With dead ends: 2648 [2021-07-13 19:34:37,110 INFO L226 Difference]: Without dead ends: 2646 [2021-07-13 19:34:37,110 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 139.6ms TimeCoverageRelationStatistics Valid=269, Invalid=487, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:34:37,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2646 states. [2021-07-13 19:34:37,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2646 to 2464. [2021-07-13 19:34:37,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2464 states, 2463 states have (on average 3.3909866017052375) internal successors, (8352), 2463 states have internal predecessors, (8352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:37,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2464 states to 2464 states and 8352 transitions. [2021-07-13 19:34:37,144 INFO L78 Accepts]: Start accepts. Automaton has 2464 states and 8352 transitions. Word has length 22 [2021-07-13 19:34:37,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:37,144 INFO L482 AbstractCegarLoop]: Abstraction has 2464 states and 8352 transitions. [2021-07-13 19:34:37,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:37,144 INFO L276 IsEmpty]: Start isEmpty. Operand 2464 states and 8352 transitions. [2021-07-13 19:34:37,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:34:37,166 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:37,166 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:37,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21468 [2021-07-13 19:34:37,367 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:37,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:37,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1533624868, now seen corresponding path program 103 times [2021-07-13 19:34:37,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:37,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741081825] [2021-07-13 19:34:37,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:37,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:37,443 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:37,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:37,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741081825] [2021-07-13 19:34:37,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741081825] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:37,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953992849] [2021-07-13 19:34:37,443 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 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 [2021-07-13 19:34:37,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:37,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:34:37,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:37,532 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:37,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953992849] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:37,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:37,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-13 19:34:37,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084751825] [2021-07-13 19:34:37,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:34:37,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:37,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:34:37,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:34:37,533 INFO L87 Difference]: Start difference. First operand 2464 states and 8352 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:37,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:37,627 INFO L93 Difference]: Finished difference Result 2940 states and 9196 transitions. [2021-07-13 19:34:37,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:34:37,627 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:34:37,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:37,632 INFO L225 Difference]: With dead ends: 2940 [2021-07-13 19:34:37,632 INFO L226 Difference]: Without dead ends: 2940 [2021-07-13 19:34:37,632 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 81.8ms TimeCoverageRelationStatistics Valid=138, Invalid=204, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:34:37,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2940 states. [2021-07-13 19:34:37,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2940 to 2381. [2021-07-13 19:34:37,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2381 states, 2380 states have (on average 3.376890756302521) internal successors, (8037), 2380 states have internal predecessors, (8037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:37,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2381 states to 2381 states and 8037 transitions. [2021-07-13 19:34:37,674 INFO L78 Accepts]: Start accepts. Automaton has 2381 states and 8037 transitions. Word has length 22 [2021-07-13 19:34:37,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:37,674 INFO L482 AbstractCegarLoop]: Abstraction has 2381 states and 8037 transitions. [2021-07-13 19:34:37,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:37,674 INFO L276 IsEmpty]: Start isEmpty. Operand 2381 states and 8037 transitions. [2021-07-13 19:34:37,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:34:37,677 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:37,677 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:37,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21469 [2021-07-13 19:34:37,891 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:37,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:37,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1245304477, now seen corresponding path program 104 times [2021-07-13 19:34:37,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:37,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538570755] [2021-07-13 19:34:37,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:37,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:37,962 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:37,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:37,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538570755] [2021-07-13 19:34:37,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538570755] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:37,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806969490] [2021-07-13 19:34:37,962 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 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 [2021-07-13 19:34:37,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:34:37,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:37,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:34:37,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:38,039 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:38,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806969490] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:38,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:38,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-13 19:34:38,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737887930] [2021-07-13 19:34:38,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:34:38,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:38,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:34:38,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:34:38,040 INFO L87 Difference]: Start difference. First operand 2381 states and 8037 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:38,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:38,210 INFO L93 Difference]: Finished difference Result 2660 states and 8730 transitions. [2021-07-13 19:34:38,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:34:38,211 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:34:38,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:38,215 INFO L225 Difference]: With dead ends: 2660 [2021-07-13 19:34:38,215 INFO L226 Difference]: Without dead ends: 2657 [2021-07-13 19:34:38,215 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 142.7ms TimeCoverageRelationStatistics Valid=260, Invalid=496, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:34:38,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2657 states. [2021-07-13 19:34:38,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2657 to 2387. [2021-07-13 19:34:38,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2387 states, 2386 states have (on average 3.377200335289187) internal successors, (8058), 2386 states have internal predecessors, (8058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:38,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2387 states to 2387 states and 8058 transitions. [2021-07-13 19:34:38,248 INFO L78 Accepts]: Start accepts. Automaton has 2387 states and 8058 transitions. Word has length 22 [2021-07-13 19:34:38,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:38,248 INFO L482 AbstractCegarLoop]: Abstraction has 2387 states and 8058 transitions. [2021-07-13 19:34:38,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:38,248 INFO L276 IsEmpty]: Start isEmpty. Operand 2387 states and 8058 transitions. [2021-07-13 19:34:38,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:34:38,250 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:38,250 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:38,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21470,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:38,451 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:38,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:38,451 INFO L82 PathProgramCache]: Analyzing trace with hash -527234934, now seen corresponding path program 105 times [2021-07-13 19:34:38,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:38,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946684256] [2021-07-13 19:34:38,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:38,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:38,535 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:38,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:38,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946684256] [2021-07-13 19:34:38,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946684256] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:38,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950458896] [2021-07-13 19:34:38,536 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 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 [2021-07-13 19:34:38,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 19:34:38,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:38,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:34:38,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:38,619 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:38,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950458896] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:38,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:38,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-13 19:34:38,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516674486] [2021-07-13 19:34:38,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:34:38,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:38,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:34:38,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:34:38,620 INFO L87 Difference]: Start difference. First operand 2387 states and 8058 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:38,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:38,720 INFO L93 Difference]: Finished difference Result 4123 states and 13618 transitions. [2021-07-13 19:34:38,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:34:38,721 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:34:38,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:38,727 INFO L225 Difference]: With dead ends: 4123 [2021-07-13 19:34:38,728 INFO L226 Difference]: Without dead ends: 4123 [2021-07-13 19:34:38,728 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 93.0ms TimeCoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:34:38,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4123 states. [2021-07-13 19:34:38,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4123 to 3555. [2021-07-13 19:34:38,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3555 states, 3554 states have (on average 3.51435002813731) internal successors, (12490), 3554 states have internal predecessors, (12490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:38,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3555 states to 3555 states and 12490 transitions. [2021-07-13 19:34:38,808 INFO L78 Accepts]: Start accepts. Automaton has 3555 states and 12490 transitions. Word has length 22 [2021-07-13 19:34:38,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:38,808 INFO L482 AbstractCegarLoop]: Abstraction has 3555 states and 12490 transitions. [2021-07-13 19:34:38,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:38,809 INFO L276 IsEmpty]: Start isEmpty. Operand 3555 states and 12490 transitions. [2021-07-13 19:34:38,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:34:38,812 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:38,812 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:39,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21471,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:39,013 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:39,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:39,013 INFO L82 PathProgramCache]: Analyzing trace with hash 172219097, now seen corresponding path program 106 times [2021-07-13 19:34:39,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:39,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295933759] [2021-07-13 19:34:39,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:39,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:39,087 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:39,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:39,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295933759] [2021-07-13 19:34:39,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295933759] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:39,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754954021] [2021-07-13 19:34:39,088 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:34:39,112 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:34:39,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:39,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:34:39,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:39,153 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 38 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:39,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754954021] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:39,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:39,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-13 19:34:39,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52671309] [2021-07-13 19:34:39,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:34:39,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:39,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:34:39,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:34:39,154 INFO L87 Difference]: Start difference. First operand 3555 states and 12490 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:39,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:39,335 INFO L93 Difference]: Finished difference Result 3810 states and 13136 transitions. [2021-07-13 19:34:39,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:34:39,335 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:34:39,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:39,343 INFO L225 Difference]: With dead ends: 3810 [2021-07-13 19:34:39,343 INFO L226 Difference]: Without dead ends: 3806 [2021-07-13 19:34:39,344 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 150.1ms TimeCoverageRelationStatistics Valid=253, Invalid=503, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:34:39,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3806 states. [2021-07-13 19:34:39,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3806 to 3556. [2021-07-13 19:34:39,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3556 states, 3555 states have (on average 3.5130801687763715) internal successors, (12489), 3555 states have internal predecessors, (12489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:39,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3556 states to 3556 states and 12489 transitions. [2021-07-13 19:34:39,407 INFO L78 Accepts]: Start accepts. Automaton has 3556 states and 12489 transitions. Word has length 22 [2021-07-13 19:34:39,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:39,407 INFO L482 AbstractCegarLoop]: Abstraction has 3556 states and 12489 transitions. [2021-07-13 19:34:39,408 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:39,408 INFO L276 IsEmpty]: Start isEmpty. Operand 3556 states and 12489 transitions. [2021-07-13 19:34:39,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:34:39,411 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:39,411 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:39,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21472,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:39,612 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:39,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:39,612 INFO L82 PathProgramCache]: Analyzing trace with hash 10620644, now seen corresponding path program 107 times [2021-07-13 19:34:39,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:39,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264827881] [2021-07-13 19:34:39,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:39,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:39,700 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:39,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:39,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264827881] [2021-07-13 19:34:39,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264827881] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:39,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931933084] [2021-07-13 19:34:39,700 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 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 [2021-07-13 19:34:39,739 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:34:39,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:39,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:34:39,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:39,794 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:39,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931933084] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:39,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:39,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-13 19:34:39,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459174903] [2021-07-13 19:34:39,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:34:39,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:39,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:34:39,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:34:39,795 INFO L87 Difference]: Start difference. First operand 3556 states and 12489 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:39,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:39,995 INFO L93 Difference]: Finished difference Result 5567 states and 18927 transitions. [2021-07-13 19:34:39,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:34:39,996 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:34:39,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:40,011 INFO L225 Difference]: With dead ends: 5567 [2021-07-13 19:34:40,011 INFO L226 Difference]: Without dead ends: 5567 [2021-07-13 19:34:40,012 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 158.7ms TimeCoverageRelationStatistics Valid=239, Invalid=411, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:34:40,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5567 states. [2021-07-13 19:34:40,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5567 to 4818. [2021-07-13 19:34:40,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4818 states, 4817 states have (on average 3.5931077434087606) internal successors, (17308), 4817 states have internal predecessors, (17308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:40,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4818 states to 4818 states and 17308 transitions. [2021-07-13 19:34:40,109 INFO L78 Accepts]: Start accepts. Automaton has 4818 states and 17308 transitions. Word has length 22 [2021-07-13 19:34:40,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:40,109 INFO L482 AbstractCegarLoop]: Abstraction has 4818 states and 17308 transitions. [2021-07-13 19:34:40,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:40,109 INFO L276 IsEmpty]: Start isEmpty. Operand 4818 states and 17308 transitions. [2021-07-13 19:34:40,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:34:40,114 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:40,114 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:40,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21473,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:40,314 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:40,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:40,315 INFO L82 PathProgramCache]: Analyzing trace with hash 815838919, now seen corresponding path program 108 times [2021-07-13 19:34:40,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:40,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794449052] [2021-07-13 19:34:40,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:40,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:40,380 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 20 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:40,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:40,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794449052] [2021-07-13 19:34:40,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794449052] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:40,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480124320] [2021-07-13 19:34:40,381 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 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 [2021-07-13 19:34:40,409 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-13 19:34:40,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:40,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:34:40,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:40,450 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:34:40,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480124320] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:40,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:40,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:34:40,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966976261] [2021-07-13 19:34:40,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:34:40,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:40,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:34:40,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=123, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:34:40,451 INFO L87 Difference]: Start difference. First operand 4818 states and 17308 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:40,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:40,564 INFO L93 Difference]: Finished difference Result 5072 states and 17481 transitions. [2021-07-13 19:34:40,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:34:40,564 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:34:40,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:40,573 INFO L225 Difference]: With dead ends: 5072 [2021-07-13 19:34:40,573 INFO L226 Difference]: Without dead ends: 5072 [2021-07-13 19:34:40,573 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 94.1ms TimeCoverageRelationStatistics Valid=171, Invalid=249, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:34:40,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5072 states. [2021-07-13 19:34:40,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5072 to 4661. [2021-07-13 19:34:40,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4661 states, 4660 states have (on average 3.5489270386266094) internal successors, (16538), 4660 states have internal predecessors, (16538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:40,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4661 states to 4661 states and 16538 transitions. [2021-07-13 19:34:40,648 INFO L78 Accepts]: Start accepts. Automaton has 4661 states and 16538 transitions. Word has length 22 [2021-07-13 19:34:40,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:40,648 INFO L482 AbstractCegarLoop]: Abstraction has 4661 states and 16538 transitions. [2021-07-13 19:34:40,648 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:40,649 INFO L276 IsEmpty]: Start isEmpty. Operand 4661 states and 16538 transitions. [2021-07-13 19:34:40,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:34:40,653 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:40,653 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:40,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21474 [2021-07-13 19:34:40,853 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:40,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:40,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1899129052, now seen corresponding path program 109 times [2021-07-13 19:34:40,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:40,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626454671] [2021-07-13 19:34:40,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:40,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:40,916 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 29 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:40,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:40,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626454671] [2021-07-13 19:34:40,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626454671] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:40,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866145325] [2021-07-13 19:34:40,917 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 [2021-07-13 19:34:40,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:40,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:34:40,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:40,976 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 33 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:34:40,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866145325] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:40,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:40,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:34:40,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085598620] [2021-07-13 19:34:40,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:34:40,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:40,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:34:40,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=121, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:34:40,977 INFO L87 Difference]: Start difference. First operand 4661 states and 16538 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:41,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:41,179 INFO L93 Difference]: Finished difference Result 5066 states and 17441 transitions. [2021-07-13 19:34:41,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:34:41,180 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:34:41,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:41,189 INFO L225 Difference]: With dead ends: 5066 [2021-07-13 19:34:41,189 INFO L226 Difference]: Without dead ends: 5064 [2021-07-13 19:34:41,189 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 131.0ms TimeCoverageRelationStatistics Valid=243, Invalid=407, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:34:41,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5064 states. [2021-07-13 19:34:41,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5064 to 4803. [2021-07-13 19:34:41,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4803 states, 4802 states have (on average 3.546022490628905) internal successors, (17028), 4802 states have internal predecessors, (17028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:41,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4803 states to 4803 states and 17028 transitions. [2021-07-13 19:34:41,294 INFO L78 Accepts]: Start accepts. Automaton has 4803 states and 17028 transitions. Word has length 22 [2021-07-13 19:34:41,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:41,295 INFO L482 AbstractCegarLoop]: Abstraction has 4803 states and 17028 transitions. [2021-07-13 19:34:41,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:41,295 INFO L276 IsEmpty]: Start isEmpty. Operand 4803 states and 17028 transitions. [2021-07-13 19:34:41,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:34:41,300 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:41,300 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:41,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21475,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:41,502 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:41,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:41,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1739036067, now seen corresponding path program 110 times [2021-07-13 19:34:41,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:41,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912773778] [2021-07-13 19:34:41,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:41,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:41,571 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:41,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:41,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912773778] [2021-07-13 19:34:41,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912773778] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:41,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847266005] [2021-07-13 19:34:41,571 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 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 [2021-07-13 19:34:41,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:34:41,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:41,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:34:41,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:41,630 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:41,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847266005] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:41,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:41,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:34:41,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652343733] [2021-07-13 19:34:41,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:34:41,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:41,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:34:41,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=123, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:34:41,631 INFO L87 Difference]: Start difference. First operand 4803 states and 17028 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:41,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:41,802 INFO L93 Difference]: Finished difference Result 5001 states and 17312 transitions. [2021-07-13 19:34:41,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:34:41,802 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:34:41,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:41,810 INFO L225 Difference]: With dead ends: 5001 [2021-07-13 19:34:41,810 INFO L226 Difference]: Without dead ends: 4999 [2021-07-13 19:34:41,811 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 122.7ms TimeCoverageRelationStatistics Valid=241, Invalid=409, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:34:41,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4999 states. [2021-07-13 19:34:41,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4999 to 4791. [2021-07-13 19:34:41,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4791 states, 4790 states have (on average 3.5361169102296452) internal successors, (16938), 4790 states have internal predecessors, (16938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:41,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4791 states to 4791 states and 16938 transitions. [2021-07-13 19:34:41,890 INFO L78 Accepts]: Start accepts. Automaton has 4791 states and 16938 transitions. Word has length 22 [2021-07-13 19:34:41,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:41,890 INFO L482 AbstractCegarLoop]: Abstraction has 4791 states and 16938 transitions. [2021-07-13 19:34:41,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:41,890 INFO L276 IsEmpty]: Start isEmpty. Operand 4791 states and 16938 transitions. [2021-07-13 19:34:41,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:34:41,894 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:41,894 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:42,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21476 [2021-07-13 19:34:42,095 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:42,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:42,095 INFO L82 PathProgramCache]: Analyzing trace with hash -816617334, now seen corresponding path program 111 times [2021-07-13 19:34:42,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:42,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689679217] [2021-07-13 19:34:42,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:42,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:42,158 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 26 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:42,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:42,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689679217] [2021-07-13 19:34:42,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689679217] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:42,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264126688] [2021-07-13 19:34:42,158 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 [2021-07-13 19:34:42,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 19:34:42,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:42,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:34:42,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:42,224 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 30 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:42,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264126688] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:42,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:42,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:34:42,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063489609] [2021-07-13 19:34:42,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:34:42,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:42,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:34:42,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=121, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:34:42,225 INFO L87 Difference]: Start difference. First operand 4791 states and 16938 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:42,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:42,338 INFO L93 Difference]: Finished difference Result 5161 states and 17507 transitions. [2021-07-13 19:34:42,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:34:42,338 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:34:42,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:42,350 INFO L225 Difference]: With dead ends: 5161 [2021-07-13 19:34:42,350 INFO L226 Difference]: Without dead ends: 5161 [2021-07-13 19:34:42,350 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 63.5ms TimeCoverageRelationStatistics Valid=103, Invalid=137, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:34:42,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5161 states. [2021-07-13 19:34:42,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5161 to 4811. [2021-07-13 19:34:42,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4811 states, 4810 states have (on average 3.51995841995842) internal successors, (16931), 4810 states have internal predecessors, (16931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:42,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4811 states to 4811 states and 16931 transitions. [2021-07-13 19:34:42,450 INFO L78 Accepts]: Start accepts. Automaton has 4811 states and 16931 transitions. Word has length 22 [2021-07-13 19:34:42,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:42,450 INFO L482 AbstractCegarLoop]: Abstraction has 4811 states and 16931 transitions. [2021-07-13 19:34:42,450 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:42,450 INFO L276 IsEmpty]: Start isEmpty. Operand 4811 states and 16931 transitions. [2021-07-13 19:34:42,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:34:42,454 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:42,455 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:42,655 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21477 [2021-07-13 19:34:42,655 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:42,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:42,655 INFO L82 PathProgramCache]: Analyzing trace with hash -28422759, now seen corresponding path program 112 times [2021-07-13 19:34:42,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:42,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027044062] [2021-07-13 19:34:42,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:42,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:42,725 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:42,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:42,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027044062] [2021-07-13 19:34:42,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027044062] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:42,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720444940] [2021-07-13 19:34:42,725 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 [2021-07-13 19:34:42,750 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:34:42,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:42,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:34:42,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:42,795 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 30 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:42,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720444940] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:42,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:42,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-13 19:34:42,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125137081] [2021-07-13 19:34:42,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:34:42,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:42,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:34:42,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:34:42,796 INFO L87 Difference]: Start difference. First operand 4811 states and 16931 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:42,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:42,975 INFO L93 Difference]: Finished difference Result 5011 states and 17220 transitions. [2021-07-13 19:34:42,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:34:42,975 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:34:42,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:42,983 INFO L225 Difference]: With dead ends: 5011 [2021-07-13 19:34:42,984 INFO L226 Difference]: Without dead ends: 5009 [2021-07-13 19:34:42,984 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 141.5ms TimeCoverageRelationStatistics Valid=270, Invalid=486, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:34:42,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5009 states. [2021-07-13 19:34:43,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5009 to 4811. [2021-07-13 19:34:43,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4811 states, 4810 states have (on average 3.5185031185031184) internal successors, (16924), 4810 states have internal predecessors, (16924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:43,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4811 states to 4811 states and 16924 transitions. [2021-07-13 19:34:43,065 INFO L78 Accepts]: Start accepts. Automaton has 4811 states and 16924 transitions. Word has length 22 [2021-07-13 19:34:43,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:43,065 INFO L482 AbstractCegarLoop]: Abstraction has 4811 states and 16924 transitions. [2021-07-13 19:34:43,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:43,065 INFO L276 IsEmpty]: Start isEmpty. Operand 4811 states and 16924 transitions. [2021-07-13 19:34:43,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:34:43,070 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:43,070 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:43,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21478 [2021-07-13 19:34:43,285 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:43,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:43,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1749302628, now seen corresponding path program 113 times [2021-07-13 19:34:43,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:43,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720543822] [2021-07-13 19:34:43,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:43,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:43,358 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:43,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:43,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720543822] [2021-07-13 19:34:43,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720543822] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:43,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215216593] [2021-07-13 19:34:43,358 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 [2021-07-13 19:34:43,391 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-13 19:34:43,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:43,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:34:43,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:43,448 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 24 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:43,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215216593] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:43,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:43,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-13 19:34:43,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057334818] [2021-07-13 19:34:43,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:34:43,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:43,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:34:43,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:34:43,449 INFO L87 Difference]: Start difference. First operand 4811 states and 16924 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:43,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:43,570 INFO L93 Difference]: Finished difference Result 5260 states and 17706 transitions. [2021-07-13 19:34:43,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:34:43,570 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:34:43,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:43,583 INFO L225 Difference]: With dead ends: 5260 [2021-07-13 19:34:43,583 INFO L226 Difference]: Without dead ends: 5260 [2021-07-13 19:34:43,583 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 91.3ms TimeCoverageRelationStatistics Valid=137, Invalid=205, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:34:43,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5260 states. [2021-07-13 19:34:43,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5260 to 4668. [2021-07-13 19:34:43,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4668 states, 4667 states have (on average 3.503106920934219) internal successors, (16349), 4667 states have internal predecessors, (16349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:43,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4668 states to 4668 states and 16349 transitions. [2021-07-13 19:34:43,701 INFO L78 Accepts]: Start accepts. Automaton has 4668 states and 16349 transitions. Word has length 22 [2021-07-13 19:34:43,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:43,701 INFO L482 AbstractCegarLoop]: Abstraction has 4668 states and 16349 transitions. [2021-07-13 19:34:43,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:43,701 INFO L276 IsEmpty]: Start isEmpty. Operand 4668 states and 16349 transitions. [2021-07-13 19:34:43,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:34:43,706 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:43,706 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:43,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21479,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:43,930 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:43,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:43,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1460982237, now seen corresponding path program 114 times [2021-07-13 19:34:43,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:43,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809371411] [2021-07-13 19:34:43,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:43,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:43,997 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:43,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:43,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809371411] [2021-07-13 19:34:43,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809371411] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:43,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449322033] [2021-07-13 19:34:43,998 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 [2021-07-13 19:34:44,025 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-13 19:34:44,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:44,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:34:44,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:44,067 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 30 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:44,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449322033] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:44,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:44,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-13 19:34:44,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921616836] [2021-07-13 19:34:44,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:34:44,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:44,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:34:44,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:34:44,068 INFO L87 Difference]: Start difference. First operand 4668 states and 16349 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:44,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:44,243 INFO L93 Difference]: Finished difference Result 4999 states and 17165 transitions. [2021-07-13 19:34:44,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:34:44,244 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:34:44,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:44,252 INFO L225 Difference]: With dead ends: 4999 [2021-07-13 19:34:44,252 INFO L226 Difference]: Without dead ends: 4996 [2021-07-13 19:34:44,252 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 139.2ms TimeCoverageRelationStatistics Valid=261, Invalid=495, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:34:44,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4996 states. [2021-07-13 19:34:44,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4996 to 4674. [2021-07-13 19:34:44,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4674 states, 4673 states have (on average 3.503316927027605) internal successors, (16371), 4673 states have internal predecessors, (16371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:44,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4674 states to 4674 states and 16371 transitions. [2021-07-13 19:34:44,328 INFO L78 Accepts]: Start accepts. Automaton has 4674 states and 16371 transitions. Word has length 22 [2021-07-13 19:34:44,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:44,328 INFO L482 AbstractCegarLoop]: Abstraction has 4674 states and 16371 transitions. [2021-07-13 19:34:44,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:44,328 INFO L276 IsEmpty]: Start isEmpty. Operand 4674 states and 16371 transitions. [2021-07-13 19:34:44,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:34:44,333 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:44,333 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:44,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21480 [2021-07-13 19:34:44,549 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:44,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:44,549 INFO L82 PathProgramCache]: Analyzing trace with hash -311557174, now seen corresponding path program 115 times [2021-07-13 19:34:44,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:44,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578908115] [2021-07-13 19:34:44,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:44,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:44,618 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:44,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:44,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578908115] [2021-07-13 19:34:44,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578908115] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:44,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602267030] [2021-07-13 19:34:44,618 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 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 [2021-07-13 19:34:44,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:44,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:34:44,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:44,732 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:44,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602267030] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:44,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:44,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-13 19:34:44,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648451821] [2021-07-13 19:34:44,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:34:44,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:44,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:34:44,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:34:44,733 INFO L87 Difference]: Start difference. First operand 4674 states and 16371 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:44,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:44,856 INFO L93 Difference]: Finished difference Result 8484 states and 29708 transitions. [2021-07-13 19:34:44,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:34:44,857 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:34:44,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:44,874 INFO L225 Difference]: With dead ends: 8484 [2021-07-13 19:34:44,874 INFO L226 Difference]: Without dead ends: 8484 [2021-07-13 19:34:44,874 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 90.3ms TimeCoverageRelationStatistics Valid=141, Invalid=239, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:34:44,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8484 states. [2021-07-13 19:34:44,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8484 to 7934. [2021-07-13 19:34:45,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7934 states, 7933 states have (on average 3.6155300642884156) internal successors, (28682), 7933 states have internal predecessors, (28682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:45,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7934 states to 7934 states and 28682 transitions. [2021-07-13 19:34:45,029 INFO L78 Accepts]: Start accepts. Automaton has 7934 states and 28682 transitions. Word has length 22 [2021-07-13 19:34:45,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:45,029 INFO L482 AbstractCegarLoop]: Abstraction has 7934 states and 28682 transitions. [2021-07-13 19:34:45,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:45,030 INFO L276 IsEmpty]: Start isEmpty. Operand 7934 states and 28682 transitions. [2021-07-13 19:34:45,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:34:45,035 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:45,035 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:45,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21481,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:45,249 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:45,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:45,249 INFO L82 PathProgramCache]: Analyzing trace with hash 387896857, now seen corresponding path program 116 times [2021-07-13 19:34:45,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:45,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545723052] [2021-07-13 19:34:45,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:45,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:45,328 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:45,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:45,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545723052] [2021-07-13 19:34:45,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545723052] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:45,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703222824] [2021-07-13 19:34:45,329 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 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 [2021-07-13 19:34:45,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:34:45,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:45,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:34:45,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:45,407 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:45,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703222824] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:45,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:45,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-13 19:34:45,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334753076] [2021-07-13 19:34:45,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:34:45,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:45,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:34:45,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:34:45,408 INFO L87 Difference]: Start difference. First operand 7934 states and 28682 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:45,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:45,607 INFO L93 Difference]: Finished difference Result 8250 states and 29464 transitions. [2021-07-13 19:34:45,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:34:45,607 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:34:45,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:45,625 INFO L225 Difference]: With dead ends: 8250 [2021-07-13 19:34:45,625 INFO L226 Difference]: Without dead ends: 8246 [2021-07-13 19:34:45,626 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 154.0ms TimeCoverageRelationStatistics Valid=254, Invalid=502, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:34:45,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8246 states. [2021-07-13 19:34:45,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8246 to 7934. [2021-07-13 19:34:45,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7934 states, 7933 states have (on average 3.615277952855162) internal successors, (28680), 7933 states have internal predecessors, (28680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:45,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7934 states to 7934 states and 28680 transitions. [2021-07-13 19:34:45,778 INFO L78 Accepts]: Start accepts. Automaton has 7934 states and 28680 transitions. Word has length 22 [2021-07-13 19:34:45,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:45,779 INFO L482 AbstractCegarLoop]: Abstraction has 7934 states and 28680 transitions. [2021-07-13 19:34:45,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:45,779 INFO L276 IsEmpty]: Start isEmpty. Operand 7934 states and 28680 transitions. [2021-07-13 19:34:45,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:34:45,783 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:45,784 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:45,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21482,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:45,984 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:45,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:45,984 INFO L82 PathProgramCache]: Analyzing trace with hash 226298404, now seen corresponding path program 117 times [2021-07-13 19:34:45,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:45,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335032478] [2021-07-13 19:34:45,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:45,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:46,057 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:46,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:46,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335032478] [2021-07-13 19:34:46,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335032478] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:46,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950672021] [2021-07-13 19:34:46,057 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 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 [2021-07-13 19:34:46,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 19:34:46,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:46,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:34:46,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:46,132 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:46,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950672021] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:46,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:46,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-13 19:34:46,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827007903] [2021-07-13 19:34:46,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:34:46,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:46,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:34:46,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:34:46,133 INFO L87 Difference]: Start difference. First operand 7934 states and 28680 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:46,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:46,316 INFO L93 Difference]: Finished difference Result 11106 states and 39649 transitions. [2021-07-13 19:34:46,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:34:46,316 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:34:46,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:46,340 INFO L225 Difference]: With dead ends: 11106 [2021-07-13 19:34:46,340 INFO L226 Difference]: Without dead ends: 11106 [2021-07-13 19:34:46,340 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 133.7ms TimeCoverageRelationStatistics Valid=196, Invalid=356, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:34:46,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11106 states. [2021-07-13 19:34:46,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11106 to 10570. [2021-07-13 19:34:46,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10570 states, 10569 states have (on average 3.65701580092724) internal successors, (38651), 10569 states have internal predecessors, (38651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:46,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10570 states to 10570 states and 38651 transitions. [2021-07-13 19:34:46,559 INFO L78 Accepts]: Start accepts. Automaton has 10570 states and 38651 transitions. Word has length 22 [2021-07-13 19:34:46,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:46,559 INFO L482 AbstractCegarLoop]: Abstraction has 10570 states and 38651 transitions. [2021-07-13 19:34:46,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:46,559 INFO L276 IsEmpty]: Start isEmpty. Operand 10570 states and 38651 transitions. [2021-07-13 19:34:46,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:34:46,564 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:46,564 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:46,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21483 [2021-07-13 19:34:46,765 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:46,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:46,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1481988445, now seen corresponding path program 118 times [2021-07-13 19:34:46,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:46,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525932129] [2021-07-13 19:34:46,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:46,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:46,849 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 31 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:46,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:46,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525932129] [2021-07-13 19:34:46,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525932129] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:46,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580038437] [2021-07-13 19:34:46,850 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 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 [2021-07-13 19:34:46,879 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:34:46,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:46,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:34:46,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:46,920 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 36 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:46,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580038437] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:46,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:46,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-13 19:34:46,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465648979] [2021-07-13 19:34:46,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:34:46,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:46,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:34:46,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:34:46,921 INFO L87 Difference]: Start difference. First operand 10570 states and 38651 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:47,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:47,112 INFO L93 Difference]: Finished difference Result 10860 states and 39397 transitions. [2021-07-13 19:34:47,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:34:47,113 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:34:47,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:47,137 INFO L225 Difference]: With dead ends: 10860 [2021-07-13 19:34:47,137 INFO L226 Difference]: Without dead ends: 10855 [2021-07-13 19:34:47,137 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 160.7ms TimeCoverageRelationStatistics Valid=249, Invalid=507, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:34:47,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10855 states. [2021-07-13 19:34:47,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10855 to 10571. [2021-07-13 19:34:47,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10571 states, 10570 states have (on average 3.656669820245979) internal successors, (38651), 10570 states have internal predecessors, (38651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:47,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10571 states to 10571 states and 38651 transitions. [2021-07-13 19:34:47,377 INFO L78 Accepts]: Start accepts. Automaton has 10571 states and 38651 transitions. Word has length 22 [2021-07-13 19:34:47,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:47,377 INFO L482 AbstractCegarLoop]: Abstraction has 10571 states and 38651 transitions. [2021-07-13 19:34:47,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:47,377 INFO L276 IsEmpty]: Start isEmpty. Operand 10571 states and 38651 transitions. [2021-07-13 19:34:47,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:34:47,382 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:47,382 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:47,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21484 [2021-07-13 19:34:47,583 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:47,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:47,583 INFO L82 PathProgramCache]: Analyzing trace with hash -280047862, now seen corresponding path program 119 times [2021-07-13 19:34:47,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:47,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796664869] [2021-07-13 19:34:47,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:47,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:47,660 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:47,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:47,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796664869] [2021-07-13 19:34:47,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796664869] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:47,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854468868] [2021-07-13 19:34:47,661 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 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 [2021-07-13 19:34:47,687 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-13 19:34:47,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:47,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:34:47,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:47,733 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:47,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854468868] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:47,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:47,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-13 19:34:47,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828131663] [2021-07-13 19:34:47,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:34:47,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:47,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:34:47,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:34:47,734 INFO L87 Difference]: Start difference. First operand 10571 states and 38651 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:47,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:47,980 INFO L93 Difference]: Finished difference Result 13741 states and 49418 transitions. [2021-07-13 19:34:47,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:34:47,980 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:34:47,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:48,012 INFO L225 Difference]: With dead ends: 13741 [2021-07-13 19:34:48,012 INFO L226 Difference]: Without dead ends: 13741 [2021-07-13 19:34:48,013 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 184.0ms TimeCoverageRelationStatistics Valid=329, Invalid=601, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:34:48,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13741 states. [2021-07-13 19:34:48,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13741 to 12995. [2021-07-13 19:34:48,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12995 states, 12994 states have (on average 3.6815453286132063) internal successors, (47838), 12994 states have internal predecessors, (47838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:48,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12995 states to 12995 states and 47838 transitions. [2021-07-13 19:34:48,303 INFO L78 Accepts]: Start accepts. Automaton has 12995 states and 47838 transitions. Word has length 22 [2021-07-13 19:34:48,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:48,303 INFO L482 AbstractCegarLoop]: Abstraction has 12995 states and 47838 transitions. [2021-07-13 19:34:48,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:48,303 INFO L276 IsEmpty]: Start isEmpty. Operand 12995 states and 47838 transitions. [2021-07-13 19:34:48,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:34:48,309 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:48,309 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:48,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21485,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:48,509 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:48,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:48,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1088085113, now seen corresponding path program 120 times [2021-07-13 19:34:48,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:48,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229503175] [2021-07-13 19:34:48,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:48,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:48,577 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 21 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:48,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:48,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229503175] [2021-07-13 19:34:48,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229503175] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:48,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089521621] [2021-07-13 19:34:48,578 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 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 [2021-07-13 19:34:48,605 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 19:34:48,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:48,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:34:48,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:48,646 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:34:48,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089521621] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:48,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:48,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:34:48,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491754068] [2021-07-13 19:34:48,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:34:48,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:48,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:34:48,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=122, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:34:48,647 INFO L87 Difference]: Start difference. First operand 12995 states and 47838 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:48,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:48,804 INFO L93 Difference]: Finished difference Result 13222 states and 47729 transitions. [2021-07-13 19:34:48,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:34:48,804 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:34:48,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:48,835 INFO L225 Difference]: With dead ends: 13222 [2021-07-13 19:34:48,835 INFO L226 Difference]: Without dead ends: 13222 [2021-07-13 19:34:48,835 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 88.6ms TimeCoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:34:48,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13222 states. [2021-07-13 19:34:49,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13222 to 12777. [2021-07-13 19:34:49,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12777 states, 12776 states have (on average 3.6486380713838447) internal successors, (46615), 12776 states have internal predecessors, (46615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:49,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12777 states to 12777 states and 46615 transitions. [2021-07-13 19:34:49,085 INFO L78 Accepts]: Start accepts. Automaton has 12777 states and 46615 transitions. Word has length 22 [2021-07-13 19:34:49,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:49,086 INFO L482 AbstractCegarLoop]: Abstraction has 12777 states and 46615 transitions. [2021-07-13 19:34:49,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:49,086 INFO L276 IsEmpty]: Start isEmpty. Operand 12777 states and 46615 transitions. [2021-07-13 19:34:49,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:34:49,092 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:49,092 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:49,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21486 [2021-07-13 19:34:49,293 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:49,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:49,293 INFO L82 PathProgramCache]: Analyzing trace with hash -4794980, now seen corresponding path program 121 times [2021-07-13 19:34:49,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:49,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133008324] [2021-07-13 19:34:49,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:49,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:49,356 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 28 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:49,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:49,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133008324] [2021-07-13 19:34:49,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133008324] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:49,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747922278] [2021-07-13 19:34:49,357 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 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 [2021-07-13 19:34:49,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:49,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:34:49,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:49,416 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 33 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:34:49,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747922278] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:49,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:49,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:34:49,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473278839] [2021-07-13 19:34:49,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:34:49,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:49,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:34:49,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=122, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:34:49,417 INFO L87 Difference]: Start difference. First operand 12777 states and 46615 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:49,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:49,643 INFO L93 Difference]: Finished difference Result 13713 states and 49513 transitions. [2021-07-13 19:34:49,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:34:49,643 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:34:49,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:49,675 INFO L225 Difference]: With dead ends: 13713 [2021-07-13 19:34:49,675 INFO L226 Difference]: Without dead ends: 13711 [2021-07-13 19:34:49,675 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 136.4ms TimeCoverageRelationStatistics Valid=242, Invalid=408, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:34:49,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13711 states. [2021-07-13 19:34:49,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13711 to 13456. [2021-07-13 19:34:49,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13456 states, 13455 states have (on average 3.6375325157933855) internal successors, (48943), 13455 states have internal predecessors, (48943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:49,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13456 states to 13456 states and 48943 transitions. [2021-07-13 19:34:49,992 INFO L78 Accepts]: Start accepts. Automaton has 13456 states and 48943 transitions. Word has length 22 [2021-07-13 19:34:49,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:49,992 INFO L482 AbstractCegarLoop]: Abstraction has 13456 states and 48943 transitions. [2021-07-13 19:34:49,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:49,992 INFO L276 IsEmpty]: Start isEmpty. Operand 13456 states and 48943 transitions. [2021-07-13 19:34:49,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:34:49,998 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:49,998 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:50,198 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21487,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:50,199 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:50,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:50,199 INFO L82 PathProgramCache]: Analyzing trace with hash 652007197, now seen corresponding path program 122 times [2021-07-13 19:34:50,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:50,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388196068] [2021-07-13 19:34:50,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:50,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:50,275 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:34:50,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:50,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388196068] [2021-07-13 19:34:50,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388196068] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:50,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815249438] [2021-07-13 19:34:50,276 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 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 [2021-07-13 19:34:50,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:34:50,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:50,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:34:50,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:50,345 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 31 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:34:50,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815249438] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:50,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:50,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:34:50,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783095575] [2021-07-13 19:34:50,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:34:50,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:50,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:34:50,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=122, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:34:50,346 INFO L87 Difference]: Start difference. First operand 13456 states and 48943 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:50,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:50,561 INFO L93 Difference]: Finished difference Result 13655 states and 49230 transitions. [2021-07-13 19:34:50,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:34:50,561 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:34:50,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:50,592 INFO L225 Difference]: With dead ends: 13655 [2021-07-13 19:34:50,592 INFO L226 Difference]: Without dead ends: 13653 [2021-07-13 19:34:50,593 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 130.5ms TimeCoverageRelationStatistics Valid=242, Invalid=408, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:34:50,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13653 states. [2021-07-13 19:34:50,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13653 to 13436. [2021-07-13 19:34:50,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13436 states, 13435 states have (on average 3.621734276144399) internal successors, (48658), 13435 states have internal predecessors, (48658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:50,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13436 states to 13436 states and 48658 transitions. [2021-07-13 19:34:50,846 INFO L78 Accepts]: Start accepts. Automaton has 13436 states and 48658 transitions. Word has length 22 [2021-07-13 19:34:50,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:50,846 INFO L482 AbstractCegarLoop]: Abstraction has 13436 states and 48658 transitions. [2021-07-13 19:34:50,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:50,846 INFO L276 IsEmpty]: Start isEmpty. Operand 13436 states and 48658 transitions. [2021-07-13 19:34:50,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:34:50,852 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:50,852 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:51,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21488 [2021-07-13 19:34:51,052 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:51,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:51,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1574425930, now seen corresponding path program 123 times [2021-07-13 19:34:51,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:51,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695810872] [2021-07-13 19:34:51,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:51,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:51,130 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:34:51,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:51,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695810872] [2021-07-13 19:34:51,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695810872] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:51,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649173685] [2021-07-13 19:34:51,130 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 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 [2021-07-13 19:34:51,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 19:34:51,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:51,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:34:51,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:51,206 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:34:51,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649173685] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:51,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:51,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:34:51,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459648234] [2021-07-13 19:34:51,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:34:51,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:51,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:34:51,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=122, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:34:51,207 INFO L87 Difference]: Start difference. First operand 13436 states and 48658 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:51,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:51,317 INFO L93 Difference]: Finished difference Result 13677 states and 48611 transitions. [2021-07-13 19:34:51,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:34:51,318 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:34:51,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:51,348 INFO L225 Difference]: With dead ends: 13677 [2021-07-13 19:34:51,349 INFO L226 Difference]: Without dead ends: 13677 [2021-07-13 19:34:51,349 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 65.1ms TimeCoverageRelationStatistics Valid=102, Invalid=138, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:34:51,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13677 states. [2021-07-13 19:34:51,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13677 to 13135. [2021-07-13 19:34:51,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13135 states, 13134 states have (on average 3.607887924470839) internal successors, (47386), 13134 states have internal predecessors, (47386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:51,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13135 states to 13135 states and 47386 transitions. [2021-07-13 19:34:51,612 INFO L78 Accepts]: Start accepts. Automaton has 13135 states and 47386 transitions. Word has length 22 [2021-07-13 19:34:51,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:51,612 INFO L482 AbstractCegarLoop]: Abstraction has 13135 states and 47386 transitions. [2021-07-13 19:34:51,612 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:51,612 INFO L276 IsEmpty]: Start isEmpty. Operand 13135 states and 47386 transitions. [2021-07-13 19:34:51,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:34:51,618 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:51,618 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:51,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21489 [2021-07-13 19:34:51,820 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:51,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:51,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1932346791, now seen corresponding path program 124 times [2021-07-13 19:34:51,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:51,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200943249] [2021-07-13 19:34:51,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:51,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:51,899 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:51,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:51,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200943249] [2021-07-13 19:34:51,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200943249] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:51,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520322758] [2021-07-13 19:34:51,899 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 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 [2021-07-13 19:34:51,926 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:34:51,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:51,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:34:51,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:51,960 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:51,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520322758] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:51,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:51,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-13 19:34:51,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243885769] [2021-07-13 19:34:51,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:34:51,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:51,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:34:51,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:34:51,962 INFO L87 Difference]: Start difference. First operand 13135 states and 47386 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:52,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:52,243 INFO L93 Difference]: Finished difference Result 13337 states and 47678 transitions. [2021-07-13 19:34:52,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:34:52,243 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:34:52,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:52,274 INFO L225 Difference]: With dead ends: 13337 [2021-07-13 19:34:52,274 INFO L226 Difference]: Without dead ends: 13335 [2021-07-13 19:34:52,274 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 139.1ms TimeCoverageRelationStatistics Valid=271, Invalid=485, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:34:52,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13335 states. [2021-07-13 19:34:52,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13335 to 13135. [2021-07-13 19:34:52,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13135 states, 13134 states have (on average 3.607202680067002) internal successors, (47377), 13134 states have internal predecessors, (47377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:52,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13135 states to 13135 states and 47377 transitions. [2021-07-13 19:34:52,532 INFO L78 Accepts]: Start accepts. Automaton has 13135 states and 47377 transitions. Word has length 22 [2021-07-13 19:34:52,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:52,532 INFO L482 AbstractCegarLoop]: Abstraction has 13135 states and 47377 transitions. [2021-07-13 19:34:52,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:52,532 INFO L276 IsEmpty]: Start isEmpty. Operand 13135 states and 47377 transitions. [2021-07-13 19:34:52,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:34:52,538 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:52,538 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:52,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21490,126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:52,741 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:52,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:52,741 INFO L82 PathProgramCache]: Analyzing trace with hash -154621404, now seen corresponding path program 125 times [2021-07-13 19:34:52,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:52,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774527986] [2021-07-13 19:34:52,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:52,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:52,809 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:52,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:52,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774527986] [2021-07-13 19:34:52,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774527986] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:52,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070828737] [2021-07-13 19:34:52,809 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 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 [2021-07-13 19:34:52,841 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-13 19:34:52,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:52,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:34:52,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:52,881 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 26 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:52,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070828737] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:52,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:52,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-13 19:34:52,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198812576] [2021-07-13 19:34:52,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:34:52,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:52,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:34:52,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:34:52,882 INFO L87 Difference]: Start difference. First operand 13135 states and 47377 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:53,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:53,036 INFO L93 Difference]: Finished difference Result 14025 states and 49447 transitions. [2021-07-13 19:34:53,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:34:53,037 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:34:53,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:53,078 INFO L225 Difference]: With dead ends: 14025 [2021-07-13 19:34:53,079 INFO L226 Difference]: Without dead ends: 14025 [2021-07-13 19:34:53,079 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 81.1ms TimeCoverageRelationStatistics Valid=136, Invalid=206, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:34:53,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14025 states. [2021-07-13 19:34:53,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14025 to 12987. [2021-07-13 19:34:53,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12987 states, 12986 states have (on average 3.587170799322347) internal successors, (46583), 12986 states have internal predecessors, (46583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:53,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12987 states to 12987 states and 46583 transitions. [2021-07-13 19:34:53,345 INFO L78 Accepts]: Start accepts. Automaton has 12987 states and 46583 transitions. Word has length 22 [2021-07-13 19:34:53,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:53,346 INFO L482 AbstractCegarLoop]: Abstraction has 12987 states and 46583 transitions. [2021-07-13 19:34:53,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:53,346 INFO L276 IsEmpty]: Start isEmpty. Operand 12987 states and 46583 transitions. [2021-07-13 19:34:53,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:34:53,352 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:53,352 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:53,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21491,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:53,552 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:53,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:53,553 INFO L82 PathProgramCache]: Analyzing trace with hash -442941795, now seen corresponding path program 126 times [2021-07-13 19:34:53,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:53,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058108316] [2021-07-13 19:34:53,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:53,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:53,628 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 23 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:53,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:53,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058108316] [2021-07-13 19:34:53,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058108316] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:53,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530836316] [2021-07-13 19:34:53,629 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 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 [2021-07-13 19:34:53,660 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 19:34:53,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:53,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:34:53,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:53,695 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:53,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530836316] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:53,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:53,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-13 19:34:53,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833252185] [2021-07-13 19:34:53,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:34:53,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:53,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:34:53,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:34:53,696 INFO L87 Difference]: Start difference. First operand 12987 states and 46583 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:53,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:53,919 INFO L93 Difference]: Finished difference Result 13344 states and 47452 transitions. [2021-07-13 19:34:53,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:34:53,919 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:34:53,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:53,950 INFO L225 Difference]: With dead ends: 13344 [2021-07-13 19:34:53,950 INFO L226 Difference]: Without dead ends: 13341 [2021-07-13 19:34:53,951 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 145.7ms TimeCoverageRelationStatistics Valid=262, Invalid=494, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:34:53,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13341 states. [2021-07-13 19:34:54,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13341 to 12991. [2021-07-13 19:34:54,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12991 states, 12990 states have (on average 3.5871439568899155) internal successors, (46597), 12990 states have internal predecessors, (46597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:54,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12991 states to 12991 states and 46597 transitions. [2021-07-13 19:34:54,213 INFO L78 Accepts]: Start accepts. Automaton has 12991 states and 46597 transitions. Word has length 22 [2021-07-13 19:34:54,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:54,213 INFO L482 AbstractCegarLoop]: Abstraction has 12991 states and 46597 transitions. [2021-07-13 19:34:54,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:54,213 INFO L276 IsEmpty]: Start isEmpty. Operand 12991 states and 46597 transitions. [2021-07-13 19:34:54,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:34:54,219 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:54,219 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:54,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21492 [2021-07-13 19:34:54,419 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:54,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:54,420 INFO L82 PathProgramCache]: Analyzing trace with hash 2079486090, now seen corresponding path program 127 times [2021-07-13 19:34:54,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:54,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740548295] [2021-07-13 19:34:54,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:54,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:54,486 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:54,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:54,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740548295] [2021-07-13 19:34:54,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740548295] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:54,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599111340] [2021-07-13 19:34:54,487 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 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 [2021-07-13 19:34:54,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:54,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:34:54,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:54,559 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:54,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599111340] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:54,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:54,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-13 19:34:54,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310052025] [2021-07-13 19:34:54,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:34:54,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:54,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:34:54,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:34:54,560 INFO L87 Difference]: Start difference. First operand 12991 states and 46597 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:54,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:54,789 INFO L93 Difference]: Finished difference Result 23387 states and 84578 transitions. [2021-07-13 19:34:54,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:34:54,790 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:34:54,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:54,852 INFO L225 Difference]: With dead ends: 23387 [2021-07-13 19:34:54,852 INFO L226 Difference]: Without dead ends: 23387 [2021-07-13 19:34:54,853 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 83.4ms TimeCoverageRelationStatistics Valid=140, Invalid=240, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:34:54,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23387 states. [2021-07-13 19:34:55,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23387 to 22894. [2021-07-13 19:34:55,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22894 states, 22893 states have (on average 3.6538679945834973) internal successors, (83648), 22893 states have internal predecessors, (83648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:55,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22894 states to 22894 states and 83648 transitions. [2021-07-13 19:34:55,376 INFO L78 Accepts]: Start accepts. Automaton has 22894 states and 83648 transitions. Word has length 22 [2021-07-13 19:34:55,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:55,376 INFO L482 AbstractCegarLoop]: Abstraction has 22894 states and 83648 transitions. [2021-07-13 19:34:55,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:55,376 INFO L276 IsEmpty]: Start isEmpty. Operand 22894 states and 83648 transitions. [2021-07-13 19:34:55,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:34:55,382 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:55,382 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:55,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21493 [2021-07-13 19:34:55,583 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:55,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:55,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1516027175, now seen corresponding path program 128 times [2021-07-13 19:34:55,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:55,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489380518] [2021-07-13 19:34:55,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:55,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:55,656 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:55,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:55,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489380518] [2021-07-13 19:34:55,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489380518] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:55,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434977982] [2021-07-13 19:34:55,656 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 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 [2021-07-13 19:34:55,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:34:55,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:55,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:34:55,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:55,716 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:55,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434977982] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:55,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:55,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-13 19:34:55,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698389667] [2021-07-13 19:34:55,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:34:55,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:55,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:34:55,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:34:55,717 INFO L87 Difference]: Start difference. First operand 22894 states and 83648 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:55,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:55,990 INFO L93 Difference]: Finished difference Result 23234 states and 84479 transitions. [2021-07-13 19:34:55,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:34:55,990 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:34:55,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:56,053 INFO L225 Difference]: With dead ends: 23234 [2021-07-13 19:34:56,053 INFO L226 Difference]: Without dead ends: 23230 [2021-07-13 19:34:56,054 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 141.5ms TimeCoverageRelationStatistics Valid=255, Invalid=501, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:34:56,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23230 states. [2021-07-13 19:34:56,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23230 to 22894. [2021-07-13 19:34:56,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22894 states, 22893 states have (on average 3.6538243131088106) internal successors, (83647), 22893 states have internal predecessors, (83647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:56,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22894 states to 22894 states and 83647 transitions. [2021-07-13 19:34:56,735 INFO L78 Accepts]: Start accepts. Automaton has 22894 states and 83647 transitions. Word has length 22 [2021-07-13 19:34:56,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:56,735 INFO L482 AbstractCegarLoop]: Abstraction has 22894 states and 83647 transitions. [2021-07-13 19:34:56,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:56,735 INFO L276 IsEmpty]: Start isEmpty. Operand 22894 states and 83647 transitions. [2021-07-13 19:34:56,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:34:56,741 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:56,741 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:56,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21494,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:56,942 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:56,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:56,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1677625628, now seen corresponding path program 129 times [2021-07-13 19:34:56,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:56,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338249841] [2021-07-13 19:34:56,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:57,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:57,204 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:57,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:57,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338249841] [2021-07-13 19:34:57,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338249841] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:57,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875201716] [2021-07-13 19:34:57,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:34:57,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 19:34:57,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:57,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:34:57,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:57,271 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:57,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875201716] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:57,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:57,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-13 19:34:57,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379939177] [2021-07-13 19:34:57,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:34:57,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:57,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:34:57,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:34:57,272 INFO L87 Difference]: Start difference. First operand 22894 states and 83647 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:57,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:57,614 INFO L93 Difference]: Finished difference Result 28918 states and 105542 transitions. [2021-07-13 19:34:57,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:34:57,614 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:34:57,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:57,712 INFO L225 Difference]: With dead ends: 28918 [2021-07-13 19:34:57,712 INFO L226 Difference]: Without dead ends: 28918 [2021-07-13 19:34:57,713 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 104.6ms TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:34:57,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28918 states. [2021-07-13 19:34:58,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28918 to 28548. [2021-07-13 19:34:58,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28548 states, 28547 states have (on average 3.676428346236032) internal successors, (104951), 28547 states have internal predecessors, (104951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:58,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28548 states to 28548 states and 104951 transitions. [2021-07-13 19:34:58,601 INFO L78 Accepts]: Start accepts. Automaton has 28548 states and 104951 transitions. Word has length 22 [2021-07-13 19:34:58,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:58,601 INFO L482 AbstractCegarLoop]: Abstraction has 28548 states and 104951 transitions. [2021-07-13 19:34:58,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:58,601 INFO L276 IsEmpty]: Start isEmpty. Operand 28548 states and 104951 transitions. [2021-07-13 19:34:58,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:34:58,609 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:58,609 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:58,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21495,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:58,813 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:58,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:58,813 INFO L82 PathProgramCache]: Analyzing trace with hash -421935587, now seen corresponding path program 130 times [2021-07-13 19:34:58,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:58,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618180162] [2021-07-13 19:34:58,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:58,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:58,896 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:58,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:58,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618180162] [2021-07-13 19:34:58,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618180162] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:58,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246126525] [2021-07-13 19:34:58,896 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 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 [2021-07-13 19:34:58,921 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:34:58,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:58,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:34:58,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:59,030 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 31 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:59,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246126525] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:59,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:59,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-13 19:34:59,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772628362] [2021-07-13 19:34:59,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:34:59,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:59,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:34:59,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:34:59,031 INFO L87 Difference]: Start difference. First operand 28548 states and 104951 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:59,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:59,394 INFO L93 Difference]: Finished difference Result 28872 states and 105754 transitions. [2021-07-13 19:34:59,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:34:59,394 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:34:59,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:59,563 INFO L225 Difference]: With dead ends: 28872 [2021-07-13 19:34:59,563 INFO L226 Difference]: Without dead ends: 28867 [2021-07-13 19:34:59,563 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 163.1ms TimeCoverageRelationStatistics Valid=250, Invalid=506, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:34:59,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28867 states. [2021-07-13 19:35:00,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28867 to 28548. [2021-07-13 19:35:00,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28548 states, 28547 states have (on average 3.676393316285424) internal successors, (104950), 28547 states have internal predecessors, (104950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:00,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28548 states to 28548 states and 104950 transitions. [2021-07-13 19:35:00,319 INFO L78 Accepts]: Start accepts. Automaton has 28548 states and 104950 transitions. Word has length 22 [2021-07-13 19:35:00,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:00,320 INFO L482 AbstractCegarLoop]: Abstraction has 28548 states and 104950 transitions. [2021-07-13 19:35:00,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:00,320 INFO L276 IsEmpty]: Start isEmpty. Operand 28548 states and 104950 transitions. [2021-07-13 19:35:00,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:35:00,326 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:00,326 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:00,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21496 [2021-07-13 19:35:00,527 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:00,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:00,527 INFO L82 PathProgramCache]: Analyzing trace with hash 2110995402, now seen corresponding path program 131 times [2021-07-13 19:35:00,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:00,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521764618] [2021-07-13 19:35:00,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:00,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:00,705 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2021-07-13 19:35:00,793 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:00,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:00,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521764618] [2021-07-13 19:35:00,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521764618] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:00,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245743630] [2021-07-13 19:35:00,794 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 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 [2021-07-13 19:35:00,843 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-13 19:35:00,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:00,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:35:00,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:00,883 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:00,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245743630] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:00,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:00,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-13 19:35:00,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833778449] [2021-07-13 19:35:00,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:35:00,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:00,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:35:00,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:35:00,884 INFO L87 Difference]: Start difference. First operand 28548 states and 104950 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:01,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:01,356 INFO L93 Difference]: Finished difference Result 31093 states and 113517 transitions. [2021-07-13 19:35:01,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:35:01,357 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:35:01,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:01,458 INFO L225 Difference]: With dead ends: 31093 [2021-07-13 19:35:01,458 INFO L226 Difference]: Without dead ends: 31093 [2021-07-13 19:35:01,459 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 308.6ms TimeCoverageRelationStatistics Valid=237, Invalid=465, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:35:01,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31093 states. [2021-07-13 19:35:02,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31093 to 30705. [2021-07-13 19:35:02,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30705 states, 30704 states have (on average 3.6772081813444504) internal successors, (112905), 30704 states have internal predecessors, (112905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:02,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30705 states to 30705 states and 112905 transitions. [2021-07-13 19:35:02,437 INFO L78 Accepts]: Start accepts. Automaton has 30705 states and 112905 transitions. Word has length 22 [2021-07-13 19:35:02,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:02,437 INFO L482 AbstractCegarLoop]: Abstraction has 30705 states and 112905 transitions. [2021-07-13 19:35:02,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:02,437 INFO L276 IsEmpty]: Start isEmpty. Operand 30705 states and 112905 transitions. [2021-07-13 19:35:02,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:35:02,444 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:02,444 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:02,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21497 [2021-07-13 19:35:02,645 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:02,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:02,645 INFO L82 PathProgramCache]: Analyzing trace with hash -864834727, now seen corresponding path program 132 times [2021-07-13 19:35:02,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:02,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131801035] [2021-07-13 19:35:02,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:02,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:02,755 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:02,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:02,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131801035] [2021-07-13 19:35:02,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131801035] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:02,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947077145] [2021-07-13 19:35:02,755 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 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 [2021-07-13 19:35:02,785 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 19:35:02,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:02,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:35:02,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:02,823 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 36 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:02,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947077145] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:02,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:02,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-13 19:35:02,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743367400] [2021-07-13 19:35:02,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:35:02,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:02,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:35:02,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:35:02,824 INFO L87 Difference]: Start difference. First operand 30705 states and 112905 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:03,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:03,342 INFO L93 Difference]: Finished difference Result 31001 states and 113666 transitions. [2021-07-13 19:35:03,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:35:03,342 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:35:03,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:03,453 INFO L225 Difference]: With dead ends: 31001 [2021-07-13 19:35:03,453 INFO L226 Difference]: Without dead ends: 30995 [2021-07-13 19:35:03,454 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 188.1ms TimeCoverageRelationStatistics Valid=247, Invalid=509, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:35:03,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30995 states. [2021-07-13 19:35:04,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30995 to 30706. [2021-07-13 19:35:04,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30706 states, 30705 states have (on average 3.6770884220810944) internal successors, (112905), 30705 states have internal predecessors, (112905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:04,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30706 states to 30706 states and 112905 transitions. [2021-07-13 19:35:04,484 INFO L78 Accepts]: Start accepts. Automaton has 30706 states and 112905 transitions. Word has length 22 [2021-07-13 19:35:04,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:04,485 INFO L482 AbstractCegarLoop]: Abstraction has 30706 states and 112905 transitions. [2021-07-13 19:35:04,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:04,485 INFO L276 IsEmpty]: Start isEmpty. Operand 30706 states and 112905 transitions. [2021-07-13 19:35:04,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:35:04,493 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:04,493 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:04,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21498 [2021-07-13 19:35:04,693 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:04,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:04,694 INFO L82 PathProgramCache]: Analyzing trace with hash -700836956, now seen corresponding path program 133 times [2021-07-13 19:35:04,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:04,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702342617] [2021-07-13 19:35:04,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:04,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:04,782 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:04,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:04,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702342617] [2021-07-13 19:35:04,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702342617] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:04,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224433410] [2021-07-13 19:35:04,785 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 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 [2021-07-13 19:35:04,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:04,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:35:04,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:04,856 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:04,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224433410] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:04,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:04,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-13 19:35:04,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054127028] [2021-07-13 19:35:04,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:35:04,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:04,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:35:04,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:35:04,857 INFO L87 Difference]: Start difference. First operand 30706 states and 112905 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:05,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:05,476 INFO L93 Difference]: Finished difference Result 32605 states and 118879 transitions. [2021-07-13 19:35:05,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:35:05,476 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:35:05,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:05,585 INFO L225 Difference]: With dead ends: 32605 [2021-07-13 19:35:05,586 INFO L226 Difference]: Without dead ends: 32605 [2021-07-13 19:35:05,586 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 266.9ms TimeCoverageRelationStatistics Valid=456, Invalid=876, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:35:05,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32605 states. [2021-07-13 19:35:06,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32605 to 32065. [2021-07-13 19:35:06,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32065 states, 32064 states have (on average 3.6761477045908184) internal successors, (117872), 32064 states have internal predecessors, (117872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:06,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32065 states to 32065 states and 117872 transitions. [2021-07-13 19:35:06,586 INFO L78 Accepts]: Start accepts. Automaton has 32065 states and 117872 transitions. Word has length 22 [2021-07-13 19:35:06,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:06,586 INFO L482 AbstractCegarLoop]: Abstraction has 32065 states and 117872 transitions. [2021-07-13 19:35:06,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:06,586 INFO L276 IsEmpty]: Start isEmpty. Operand 32065 states and 117872 transitions. [2021-07-13 19:35:06,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:35:06,593 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:06,593 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:06,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21499 [2021-07-13 19:35:06,794 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:06,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:06,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1675189249, now seen corresponding path program 134 times [2021-07-13 19:35:06,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:06,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667353257] [2021-07-13 19:35:06,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:06,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:06,853 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:35:06,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:06,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667353257] [2021-07-13 19:35:06,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667353257] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:06,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129733825] [2021-07-13 19:35:06,854 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 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 [2021-07-13 19:35:06,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:35:06,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:06,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:35:06,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:06,928 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 41 proven. 24 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 19:35:06,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129733825] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:06,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:06,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-13 19:35:06,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728734556] [2021-07-13 19:35:06,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:35:06,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:06,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:35:06,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:35:06,929 INFO L87 Difference]: Start difference. First operand 32065 states and 117872 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:07,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:07,193 INFO L93 Difference]: Finished difference Result 32258 states and 118308 transitions. [2021-07-13 19:35:07,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:35:07,194 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:35:07,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:07,295 INFO L225 Difference]: With dead ends: 32258 [2021-07-13 19:35:07,295 INFO L226 Difference]: Without dead ends: 32258 [2021-07-13 19:35:07,295 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 102.0ms TimeCoverageRelationStatistics Valid=122, Invalid=220, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:35:07,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32258 states. [2021-07-13 19:35:08,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32258 to 32110. [2021-07-13 19:35:08,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32110 states, 32109 states have (on average 3.6754492509888195) internal successors, (118015), 32109 states have internal predecessors, (118015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:08,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32110 states to 32110 states and 118015 transitions. [2021-07-13 19:35:08,369 INFO L78 Accepts]: Start accepts. Automaton has 32110 states and 118015 transitions. Word has length 22 [2021-07-13 19:35:08,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:08,369 INFO L482 AbstractCegarLoop]: Abstraction has 32110 states and 118015 transitions. [2021-07-13 19:35:08,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:08,369 INFO L276 IsEmpty]: Start isEmpty. Operand 32110 states and 118015 transitions. [2021-07-13 19:35:08,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:35:08,376 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:08,376 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:08,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21500 [2021-07-13 19:35:08,582 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:08,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:08,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1842033802, now seen corresponding path program 135 times [2021-07-13 19:35:08,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:08,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647315742] [2021-07-13 19:35:08,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:08,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:08,631 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:35:08,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:08,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647315742] [2021-07-13 19:35:08,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647315742] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:08,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969027571] [2021-07-13 19:35:08,631 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 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 [2021-07-13 19:35:08,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 19:35:08,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:08,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:35:08,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:08,693 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 43 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 19:35:08,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969027571] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:08,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:08,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-13 19:35:08,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871802621] [2021-07-13 19:35:08,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:35:08,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:08,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:35:08,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:35:08,694 INFO L87 Difference]: Start difference. First operand 32110 states and 118015 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:09,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:09,201 INFO L93 Difference]: Finished difference Result 36772 states and 134931 transitions. [2021-07-13 19:35:09,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:35:09,202 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:35:09,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:09,323 INFO L225 Difference]: With dead ends: 36772 [2021-07-13 19:35:09,323 INFO L226 Difference]: Without dead ends: 36768 [2021-07-13 19:35:09,323 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 120.7ms TimeCoverageRelationStatistics Valid=191, Invalid=361, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:35:09,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36768 states. [2021-07-13 19:35:10,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36768 to 36566. [2021-07-13 19:35:10,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36566 states, 36565 states have (on average 3.6828114316969778) internal successors, (134662), 36565 states have internal predecessors, (134662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:10,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36566 states to 36566 states and 134662 transitions. [2021-07-13 19:35:10,523 INFO L78 Accepts]: Start accepts. Automaton has 36566 states and 134662 transitions. Word has length 22 [2021-07-13 19:35:10,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:10,523 INFO L482 AbstractCegarLoop]: Abstraction has 36566 states and 134662 transitions. [2021-07-13 19:35:10,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:10,524 INFO L276 IsEmpty]: Start isEmpty. Operand 36566 states and 134662 transitions. [2021-07-13 19:35:10,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:35:10,532 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:10,532 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:10,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21501 [2021-07-13 19:35:10,733 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:10,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:10,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1592090717, now seen corresponding path program 136 times [2021-07-13 19:35:10,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:10,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451642335] [2021-07-13 19:35:10,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:10,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:10,791 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:35:10,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:10,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451642335] [2021-07-13 19:35:10,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451642335] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:10,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49290186] [2021-07-13 19:35:10,792 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 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 [2021-07-13 19:35:10,821 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:35:10,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:10,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:35:10,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:10,861 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 37 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:35:10,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49290186] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:10,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:10,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-13 19:35:10,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504874258] [2021-07-13 19:35:10,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:35:10,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:10,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:35:10,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:35:10,862 INFO L87 Difference]: Start difference. First operand 36566 states and 134662 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:11,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:11,402 INFO L93 Difference]: Finished difference Result 36756 states and 135097 transitions. [2021-07-13 19:35:11,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:35:11,402 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:35:11,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:11,537 INFO L225 Difference]: With dead ends: 36756 [2021-07-13 19:35:11,537 INFO L226 Difference]: Without dead ends: 36753 [2021-07-13 19:35:11,537 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 107.5ms TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:35:11,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36753 states. [2021-07-13 19:35:12,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36753 to 36566. [2021-07-13 19:35:12,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36566 states, 36565 states have (on average 3.682756734582251) internal successors, (134660), 36565 states have internal predecessors, (134660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:12,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36566 states to 36566 states and 134660 transitions. [2021-07-13 19:35:12,738 INFO L78 Accepts]: Start accepts. Automaton has 36566 states and 134660 transitions. Word has length 22 [2021-07-13 19:35:12,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:12,738 INFO L482 AbstractCegarLoop]: Abstraction has 36566 states and 134660 transitions. [2021-07-13 19:35:12,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:12,738 INFO L276 IsEmpty]: Start isEmpty. Operand 36566 states and 134660 transitions. [2021-07-13 19:35:12,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:35:12,748 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:12,748 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:12,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21502 [2021-07-13 19:35:12,948 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:12,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:12,949 INFO L82 PathProgramCache]: Analyzing trace with hash -180448694, now seen corresponding path program 137 times [2021-07-13 19:35:12,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:12,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511939841] [2021-07-13 19:35:12,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:12,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:13,012 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:35:13,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:13,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511939841] [2021-07-13 19:35:13,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511939841] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:13,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722683585] [2021-07-13 19:35:13,012 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 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 [2021-07-13 19:35:13,039 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:35:13,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:13,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:35:13,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:13,079 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 16 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:35:13,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722683585] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:13,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:13,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-13 19:35:13,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104727665] [2021-07-13 19:35:13,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:35:13,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:13,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:35:13,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:35:13,080 INFO L87 Difference]: Start difference. First operand 36566 states and 134660 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:13,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:13,372 INFO L93 Difference]: Finished difference Result 38596 states and 141165 transitions. [2021-07-13 19:35:13,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:35:13,372 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:35:13,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:13,512 INFO L225 Difference]: With dead ends: 38596 [2021-07-13 19:35:13,512 INFO L226 Difference]: Without dead ends: 38596 [2021-07-13 19:35:13,512 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 91.2ms TimeCoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:35:13,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38596 states. [2021-07-13 19:35:14,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38596 to 38072. [2021-07-13 19:35:14,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38072 states, 38071 states have (on average 3.6814373144913453) internal successors, (140156), 38071 states have internal predecessors, (140156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:14,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38072 states to 38072 states and 140156 transitions. [2021-07-13 19:35:14,775 INFO L78 Accepts]: Start accepts. Automaton has 38072 states and 140156 transitions. Word has length 22 [2021-07-13 19:35:14,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:14,775 INFO L482 AbstractCegarLoop]: Abstraction has 38072 states and 140156 transitions. [2021-07-13 19:35:14,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:14,775 INFO L276 IsEmpty]: Start isEmpty. Operand 38072 states and 140156 transitions. [2021-07-13 19:35:14,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:35:14,783 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:14,783 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:14,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21503,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:14,984 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:14,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:14,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1085744451, now seen corresponding path program 138 times [2021-07-13 19:35:14,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:14,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558090775] [2021-07-13 19:35:14,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:14,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:15,045 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 20 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:35:15,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:15,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558090775] [2021-07-13 19:35:15,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558090775] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:15,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764671319] [2021-07-13 19:35:15,046 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 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 [2021-07-13 19:35:15,077 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-13 19:35:15,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:15,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:35:15,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:15,119 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:35:15,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764671319] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:15,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:15,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-13 19:35:15,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373081560] [2021-07-13 19:35:15,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:35:15,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:15,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:35:15,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:35:15,120 INFO L87 Difference]: Start difference. First operand 38072 states and 140156 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:15,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:15,657 INFO L93 Difference]: Finished difference Result 38447 states and 141068 transitions. [2021-07-13 19:35:15,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:35:15,657 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:35:15,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:15,782 INFO L225 Difference]: With dead ends: 38447 [2021-07-13 19:35:15,782 INFO L226 Difference]: Without dead ends: 38444 [2021-07-13 19:35:15,783 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 117.9ms TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:35:15,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38444 states. [2021-07-13 19:35:16,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38444 to 38072. [2021-07-13 19:35:16,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38072 states, 38071 states have (on average 3.6813322476425627) internal successors, (140152), 38071 states have internal predecessors, (140152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:17,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38072 states to 38072 states and 140152 transitions. [2021-07-13 19:35:17,134 INFO L78 Accepts]: Start accepts. Automaton has 38072 states and 140152 transitions. Word has length 22 [2021-07-13 19:35:17,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:17,134 INFO L482 AbstractCegarLoop]: Abstraction has 38072 states and 140152 transitions. [2021-07-13 19:35:17,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:17,134 INFO L276 IsEmpty]: Start isEmpty. Operand 38072 states and 140152 transitions. [2021-07-13 19:35:17,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:35:17,142 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:17,142 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:17,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21504,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:17,343 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:17,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:17,343 INFO L82 PathProgramCache]: Analyzing trace with hash -686794960, now seen corresponding path program 139 times [2021-07-13 19:35:17,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:17,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966221945] [2021-07-13 19:35:17,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:17,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:17,404 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:35:17,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:17,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966221945] [2021-07-13 19:35:17,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966221945] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:17,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636096369] [2021-07-13 19:35:17,404 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 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 [2021-07-13 19:35:17,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:17,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:35:17,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:17,474 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 37 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:35:17,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636096369] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:17,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:17,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-13 19:35:17,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880734536] [2021-07-13 19:35:17,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:35:17,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:17,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:35:17,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:35:17,475 INFO L87 Difference]: Start difference. First operand 38072 states and 140152 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:18,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:18,041 INFO L93 Difference]: Finished difference Result 47743 states and 174806 transitions. [2021-07-13 19:35:18,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:35:18,041 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:35:18,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:18,286 INFO L225 Difference]: With dead ends: 47743 [2021-07-13 19:35:18,286 INFO L226 Difference]: Without dead ends: 47743 [2021-07-13 19:35:18,286 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 91.3ms TimeCoverageRelationStatistics Valid=141, Invalid=239, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:35:18,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47743 states. [2021-07-13 19:35:19,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47743 to 46337. [2021-07-13 19:35:19,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46337 states, 46336 states have (on average 3.694190262430939) internal successors, (171174), 46336 states have internal predecessors, (171174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:19,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46337 states to 46337 states and 171174 transitions. [2021-07-13 19:35:19,687 INFO L78 Accepts]: Start accepts. Automaton has 46337 states and 171174 transitions. Word has length 22 [2021-07-13 19:35:19,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:19,687 INFO L482 AbstractCegarLoop]: Abstraction has 46337 states and 171174 transitions. [2021-07-13 19:35:19,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:19,688 INFO L276 IsEmpty]: Start isEmpty. Operand 46337 states and 171174 transitions. [2021-07-13 19:35:19,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:35:19,695 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:19,695 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:19,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21505,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:19,904 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:19,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:19,904 INFO L82 PathProgramCache]: Analyzing trace with hash 12659071, now seen corresponding path program 140 times [2021-07-13 19:35:19,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:19,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971939144] [2021-07-13 19:35:19,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:19,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:19,972 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 23 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:35:19,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:19,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971939144] [2021-07-13 19:35:19,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971939144] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:19,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031430618] [2021-07-13 19:35:19,973 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 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 [2021-07-13 19:35:19,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:35:19,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:19,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:35:19,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:20,033 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:35:20,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031430618] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:20,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:20,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-13 19:35:20,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459729203] [2021-07-13 19:35:20,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:35:20,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:20,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:35:20,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:35:20,034 INFO L87 Difference]: Start difference. First operand 46337 states and 171174 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:20,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:20,684 INFO L93 Difference]: Finished difference Result 46705 states and 172114 transitions. [2021-07-13 19:35:20,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:35:20,684 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:35:20,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:20,854 INFO L225 Difference]: With dead ends: 46705 [2021-07-13 19:35:20,855 INFO L226 Difference]: Without dead ends: 46701 [2021-07-13 19:35:20,855 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 132.5ms TimeCoverageRelationStatistics Valid=201, Invalid=399, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:35:20,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46701 states. [2021-07-13 19:35:22,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46701 to 46347. [2021-07-13 19:35:22,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46347 states, 46346 states have (on average 3.693911017132007) internal successors, (171198), 46346 states have internal predecessors, (171198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:22,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46347 states to 46347 states and 171198 transitions. [2021-07-13 19:35:22,305 INFO L78 Accepts]: Start accepts. Automaton has 46347 states and 171198 transitions. Word has length 22 [2021-07-13 19:35:22,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:22,305 INFO L482 AbstractCegarLoop]: Abstraction has 46347 states and 171198 transitions. [2021-07-13 19:35:22,305 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:22,305 INFO L276 IsEmpty]: Start isEmpty. Operand 46347 states and 171198 transitions. [2021-07-13 19:35:22,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:35:22,313 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:22,313 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:22,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21506,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:22,514 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:22,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:22,514 INFO L82 PathProgramCache]: Analyzing trace with hash -148939382, now seen corresponding path program 141 times [2021-07-13 19:35:22,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:22,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702626703] [2021-07-13 19:35:22,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:22,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:22,580 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:35:22,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:22,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702626703] [2021-07-13 19:35:22,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702626703] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:22,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469833832] [2021-07-13 19:35:22,580 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 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 [2021-07-13 19:35:22,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 19:35:22,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:22,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:35:22,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:22,647 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:35:22,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469833832] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:22,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:22,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-13 19:35:22,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290180967] [2021-07-13 19:35:22,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:35:22,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:22,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:35:22,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:35:22,648 INFO L87 Difference]: Start difference. First operand 46347 states and 171198 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:23,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:23,319 INFO L93 Difference]: Finished difference Result 49378 states and 181574 transitions. [2021-07-13 19:35:23,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:35:23,319 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:35:23,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:23,478 INFO L225 Difference]: With dead ends: 49378 [2021-07-13 19:35:23,479 INFO L226 Difference]: Without dead ends: 49378 [2021-07-13 19:35:23,479 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 122.0ms TimeCoverageRelationStatistics Valid=197, Invalid=355, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:35:23,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49378 states. [2021-07-13 19:35:24,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49378 to 48899. [2021-07-13 19:35:24,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48899 states, 48898 states have (on average 3.6954272158370487) internal successors, (180699), 48898 states have internal predecessors, (180699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:25,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48899 states to 48899 states and 180699 transitions. [2021-07-13 19:35:25,143 INFO L78 Accepts]: Start accepts. Automaton has 48899 states and 180699 transitions. Word has length 22 [2021-07-13 19:35:25,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:25,143 INFO L482 AbstractCegarLoop]: Abstraction has 48899 states and 180699 transitions. [2021-07-13 19:35:25,143 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:25,143 INFO L276 IsEmpty]: Start isEmpty. Operand 48899 states and 180699 transitions. [2021-07-13 19:35:25,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:35:25,151 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:25,151 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:25,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21507 [2021-07-13 19:35:25,354 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:25,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:25,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1726087907, now seen corresponding path program 142 times [2021-07-13 19:35:25,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:25,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398718661] [2021-07-13 19:35:25,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:25,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:25,418 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 19 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:25,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:25,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398718661] [2021-07-13 19:35:25,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398718661] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:25,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162505302] [2021-07-13 19:35:25,418 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 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 [2021-07-13 19:35:25,446 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:35:25,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:25,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:35:25,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:25,707 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 22 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:35:25,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162505302] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:25,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:25,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:35:25,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132643002] [2021-07-13 19:35:25,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:35:25,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:25,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:35:25,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:35:25,708 INFO L87 Difference]: Start difference. First operand 48899 states and 180699 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:26,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:26,156 INFO L93 Difference]: Finished difference Result 49336 states and 181769 transitions. [2021-07-13 19:35:26,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:35:26,157 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:35:26,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:26,314 INFO L225 Difference]: With dead ends: 49336 [2021-07-13 19:35:26,315 INFO L226 Difference]: Without dead ends: 49333 [2021-07-13 19:35:26,315 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 132.1ms TimeCoverageRelationStatistics Valid=225, Invalid=425, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:35:26,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49333 states. [2021-07-13 19:35:27,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49333 to 48899. [2021-07-13 19:35:27,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48899 states, 48898 states have (on average 3.6953045114319605) internal successors, (180693), 48898 states have internal predecessors, (180693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:28,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48899 states to 48899 states and 180693 transitions. [2021-07-13 19:35:28,170 INFO L78 Accepts]: Start accepts. Automaton has 48899 states and 180693 transitions. Word has length 22 [2021-07-13 19:35:28,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:28,170 INFO L482 AbstractCegarLoop]: Abstraction has 48899 states and 180693 transitions. [2021-07-13 19:35:28,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:28,170 INFO L276 IsEmpty]: Start isEmpty. Operand 48899 states and 180693 transitions. [2021-07-13 19:35:28,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:35:28,180 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:28,180 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:28,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21508,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:28,397 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:28,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:28,397 INFO L82 PathProgramCache]: Analyzing trace with hash 796339978, now seen corresponding path program 143 times [2021-07-13 19:35:28,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:28,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436695311] [2021-07-13 19:35:28,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:28,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:28,466 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:28,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:28,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436695311] [2021-07-13 19:35:28,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436695311] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:28,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584289182] [2021-07-13 19:35:28,467 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 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 [2021-07-13 19:35:28,498 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-13 19:35:28,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:28,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:35:28,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:28,538 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:35:28,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584289182] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:28,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:28,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:35:28,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716746389] [2021-07-13 19:35:28,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:35:28,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:28,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:35:28,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:35:28,539 INFO L87 Difference]: Start difference. First operand 48899 states and 180693 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:28,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:28,941 INFO L93 Difference]: Finished difference Result 55383 states and 202292 transitions. [2021-07-13 19:35:28,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:35:28,941 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:35:28,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:29,450 INFO L225 Difference]: With dead ends: 55383 [2021-07-13 19:35:29,450 INFO L226 Difference]: Without dead ends: 55383 [2021-07-13 19:35:29,450 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 98.4ms TimeCoverageRelationStatistics Valid=157, Invalid=263, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:35:29,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55383 states. [2021-07-13 19:35:30,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55383 to 46016. [2021-07-13 19:35:30,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46016 states, 46015 states have (on average 3.6818428773226124) internal successors, (169420), 46015 states have internal predecessors, (169420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:30,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46016 states to 46016 states and 169420 transitions. [2021-07-13 19:35:30,983 INFO L78 Accepts]: Start accepts. Automaton has 46016 states and 169420 transitions. Word has length 22 [2021-07-13 19:35:30,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:30,983 INFO L482 AbstractCegarLoop]: Abstraction has 46016 states and 169420 transitions. [2021-07-13 19:35:30,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:30,983 INFO L276 IsEmpty]: Start isEmpty. Operand 46016 states and 169420 transitions. [2021-07-13 19:35:30,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:35:30,992 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:30,992 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:31,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21509 [2021-07-13 19:35:31,193 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:31,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:31,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1495794009, now seen corresponding path program 144 times [2021-07-13 19:35:31,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:31,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018880202] [2021-07-13 19:35:31,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:31,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:31,270 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 21 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:31,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:31,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018880202] [2021-07-13 19:35:31,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018880202] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:31,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102142063] [2021-07-13 19:35:31,270 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 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 [2021-07-13 19:35:31,304 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 19:35:31,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:31,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:35:31,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:31,342 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:35:31,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102142063] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:31,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:31,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:35:31,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168421878] [2021-07-13 19:35:31,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:35:31,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:31,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:35:31,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:35:31,343 INFO L87 Difference]: Start difference. First operand 46016 states and 169420 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:31,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:31,744 INFO L93 Difference]: Finished difference Result 46465 states and 170554 transitions. [2021-07-13 19:35:31,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:35:31,745 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:35:31,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:32,198 INFO L225 Difference]: With dead ends: 46465 [2021-07-13 19:35:32,198 INFO L226 Difference]: Without dead ends: 46461 [2021-07-13 19:35:32,198 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 145.8ms TimeCoverageRelationStatistics Valid=236, Invalid=466, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:35:32,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46461 states. [2021-07-13 19:35:33,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46461 to 46018. [2021-07-13 19:35:33,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46018 states, 46017 states have (on average 3.6818349740313363) internal successors, (169427), 46017 states have internal predecessors, (169427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:33,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46018 states to 46018 states and 169427 transitions. [2021-07-13 19:35:33,560 INFO L78 Accepts]: Start accepts. Automaton has 46018 states and 169427 transitions. Word has length 22 [2021-07-13 19:35:33,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:33,561 INFO L482 AbstractCegarLoop]: Abstraction has 46018 states and 169427 transitions. [2021-07-13 19:35:33,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:33,561 INFO L276 IsEmpty]: Start isEmpty. Operand 46018 states and 169427 transitions. [2021-07-13 19:35:33,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:35:33,571 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:33,571 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:33,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21510 [2021-07-13 19:35:33,785 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:33,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:33,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1334195556, now seen corresponding path program 145 times [2021-07-13 19:35:33,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:33,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357758876] [2021-07-13 19:35:33,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:33,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:33,849 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:33,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:33,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357758876] [2021-07-13 19:35:33,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357758876] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:33,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060605704] [2021-07-13 19:35:33,849 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 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 [2021-07-13 19:35:33,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:33,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:35:33,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:33,922 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 19 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:35:33,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060605704] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:33,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:33,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:35:33,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997265551] [2021-07-13 19:35:33,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:35:33,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:33,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:35:33,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:35:33,923 INFO L87 Difference]: Start difference. First operand 46018 states and 169427 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:34,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:34,318 INFO L93 Difference]: Finished difference Result 53081 states and 194778 transitions. [2021-07-13 19:35:34,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:35:34,319 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:35:34,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:34,774 INFO L225 Difference]: With dead ends: 53081 [2021-07-13 19:35:34,774 INFO L226 Difference]: Without dead ends: 53081 [2021-07-13 19:35:34,774 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 110.1ms TimeCoverageRelationStatistics Valid=176, Invalid=330, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:35:34,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53081 states. [2021-07-13 19:35:35,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53081 to 50036. [2021-07-13 19:35:35,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50036 states, 50035 states have (on average 3.6892775057459777) internal successors, (184593), 50035 states have internal predecessors, (184593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:36,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50036 states to 50036 states and 184593 transitions. [2021-07-13 19:35:36,341 INFO L78 Accepts]: Start accepts. Automaton has 50036 states and 184593 transitions. Word has length 22 [2021-07-13 19:35:36,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:36,342 INFO L482 AbstractCegarLoop]: Abstraction has 50036 states and 184593 transitions. [2021-07-13 19:35:36,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:36,342 INFO L276 IsEmpty]: Start isEmpty. Operand 50036 states and 184593 transitions. [2021-07-13 19:35:36,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:35:36,350 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:36,350 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:36,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21511 [2021-07-13 19:35:36,551 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:36,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:36,551 INFO L82 PathProgramCache]: Analyzing trace with hash -1705081699, now seen corresponding path program 146 times [2021-07-13 19:35:36,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:36,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025303457] [2021-07-13 19:35:36,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:36,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:36,627 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:36,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:36,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025303457] [2021-07-13 19:35:36,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025303457] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:36,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852192839] [2021-07-13 19:35:36,628 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 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 [2021-07-13 19:35:36,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:35:36,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:36,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:35:36,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:36,690 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:35:36,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852192839] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:36,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:36,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:35:36,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343669152] [2021-07-13 19:35:36,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:35:36,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:36,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:35:36,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:35:36,690 INFO L87 Difference]: Start difference. First operand 50036 states and 184593 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:37,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:37,446 INFO L93 Difference]: Finished difference Result 50456 states and 185678 transitions. [2021-07-13 19:35:37,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:35:37,447 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:35:37,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:37,643 INFO L225 Difference]: With dead ends: 50456 [2021-07-13 19:35:37,644 INFO L226 Difference]: Without dead ends: 50451 [2021-07-13 19:35:37,644 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 172.6ms TimeCoverageRelationStatistics Valid=233, Invalid=469, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:35:37,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50451 states. [2021-07-13 19:35:39,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50451 to 50049. [2021-07-13 19:35:39,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50049 states, 50048 states have (on average 3.6890185421994883) internal successors, (184628), 50048 states have internal predecessors, (184628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:39,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50049 states to 50049 states and 184628 transitions. [2021-07-13 19:35:39,415 INFO L78 Accepts]: Start accepts. Automaton has 50049 states and 184628 transitions. Word has length 22 [2021-07-13 19:35:39,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:39,415 INFO L482 AbstractCegarLoop]: Abstraction has 50049 states and 184628 transitions. [2021-07-13 19:35:39,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:39,415 INFO L276 IsEmpty]: Start isEmpty. Operand 50049 states and 184628 transitions. [2021-07-13 19:35:39,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:35:39,425 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:39,425 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:39,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21512 [2021-07-13 19:35:39,641 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:39,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:39,647 INFO L82 PathProgramCache]: Analyzing trace with hash 827849290, now seen corresponding path program 147 times [2021-07-13 19:35:39,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:39,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383785703] [2021-07-13 19:35:39,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:39,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:39,725 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:39,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:39,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383785703] [2021-07-13 19:35:39,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383785703] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:39,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501248831] [2021-07-13 19:35:39,726 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 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 [2021-07-13 19:35:39,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 19:35:39,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:39,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:35:39,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:39,807 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:35:39,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501248831] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:39,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:39,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:35:39,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987551270] [2021-07-13 19:35:39,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:35:39,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:39,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:35:39,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:35:39,808 INFO L87 Difference]: Start difference. First operand 50049 states and 184628 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:40,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:40,558 INFO L93 Difference]: Finished difference Result 51683 states and 189732 transitions. [2021-07-13 19:35:40,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:35:40,558 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:35:40,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:40,757 INFO L225 Difference]: With dead ends: 51683 [2021-07-13 19:35:40,757 INFO L226 Difference]: Without dead ends: 51683 [2021-07-13 19:35:40,757 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 179.7ms TimeCoverageRelationStatistics Valid=303, Invalid=567, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:35:40,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51683 states. [2021-07-13 19:35:42,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51683 to 51187. [2021-07-13 19:35:42,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51187 states, 51186 states have (on average 3.689856601414449) internal successors, (188869), 51186 states have internal predecessors, (188869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:42,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51187 states to 51187 states and 188869 transitions. [2021-07-13 19:35:42,360 INFO L78 Accepts]: Start accepts. Automaton has 51187 states and 188869 transitions. Word has length 22 [2021-07-13 19:35:42,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:42,360 INFO L482 AbstractCegarLoop]: Abstraction has 51187 states and 188869 transitions. [2021-07-13 19:35:42,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:42,360 INFO L276 IsEmpty]: Start isEmpty. Operand 51187 states and 188869 transitions. [2021-07-13 19:35:42,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:35:42,368 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:42,368 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:42,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21513 [2021-07-13 19:35:42,570 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:42,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:42,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1301422211, now seen corresponding path program 148 times [2021-07-13 19:35:42,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:42,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655087874] [2021-07-13 19:35:42,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:42,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:42,656 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 20 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:42,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:42,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655087874] [2021-07-13 19:35:42,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655087874] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:42,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371435446] [2021-07-13 19:35:42,656 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 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 [2021-07-13 19:35:42,691 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:35:42,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:42,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:35:42,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:42,726 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 23 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:42,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371435446] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:42,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:42,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-13 19:35:42,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347029922] [2021-07-13 19:35:42,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:35:42,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:42,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:35:42,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:35:42,727 INFO L87 Difference]: Start difference. First operand 51187 states and 188869 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:43,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:43,469 INFO L93 Difference]: Finished difference Result 51540 states and 189639 transitions. [2021-07-13 19:35:43,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:35:43,469 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:35:43,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:43,667 INFO L225 Difference]: With dead ends: 51540 [2021-07-13 19:35:43,668 INFO L226 Difference]: Without dead ends: 51537 [2021-07-13 19:35:43,668 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 149.0ms TimeCoverageRelationStatistics Valid=263, Invalid=493, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:35:43,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51537 states. [2021-07-13 19:35:45,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51537 to 51187. [2021-07-13 19:35:45,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51187 states, 51186 states have (on average 3.6897003086781544) internal successors, (188861), 51186 states have internal predecessors, (188861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:45,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51187 states to 51187 states and 188861 transitions. [2021-07-13 19:35:45,310 INFO L78 Accepts]: Start accepts. Automaton has 51187 states and 188861 transitions. Word has length 22 [2021-07-13 19:35:45,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:45,310 INFO L482 AbstractCegarLoop]: Abstraction has 51187 states and 188861 transitions. [2021-07-13 19:35:45,310 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:45,310 INFO L276 IsEmpty]: Start isEmpty. Operand 51187 states and 188861 transitions. [2021-07-13 19:35:45,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:35:45,318 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:45,318 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:45,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21514 [2021-07-13 19:35:45,519 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:45,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:45,519 INFO L82 PathProgramCache]: Analyzing trace with hash -471117200, now seen corresponding path program 149 times [2021-07-13 19:35:45,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:45,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540440529] [2021-07-13 19:35:45,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:45,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:45,588 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:45,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:45,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540440529] [2021-07-13 19:35:45,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540440529] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:45,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453483542] [2021-07-13 19:35:45,589 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 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 [2021-07-13 19:35:45,883 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:35:45,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:45,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:35:45,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:45,949 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:45,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453483542] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:45,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:45,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-13 19:35:45,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756888969] [2021-07-13 19:35:45,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:35:45,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:45,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:35:45,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:35:45,950 INFO L87 Difference]: Start difference. First operand 51187 states and 188861 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:46,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:46,357 INFO L93 Difference]: Finished difference Result 54243 states and 197469 transitions. [2021-07-13 19:35:46,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:35:46,359 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:35:46,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:46,563 INFO L225 Difference]: With dead ends: 54243 [2021-07-13 19:35:46,563 INFO L226 Difference]: Without dead ends: 54243 [2021-07-13 19:35:46,563 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 102.9ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:35:46,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54243 states. [2021-07-13 19:35:47,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54243 to 19825. [2021-07-13 19:35:47,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19825 states, 19824 states have (on average 3.5682001614205006) internal successors, (70736), 19824 states have internal predecessors, (70736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:47,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19825 states to 19825 states and 70736 transitions. [2021-07-13 19:35:47,764 INFO L78 Accepts]: Start accepts. Automaton has 19825 states and 70736 transitions. Word has length 22 [2021-07-13 19:35:47,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:47,764 INFO L482 AbstractCegarLoop]: Abstraction has 19825 states and 70736 transitions. [2021-07-13 19:35:47,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:47,764 INFO L276 IsEmpty]: Start isEmpty. Operand 19825 states and 70736 transitions. [2021-07-13 19:35:47,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:35:47,771 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:47,771 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:47,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21515,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:47,971 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:47,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:47,972 INFO L82 PathProgramCache]: Analyzing trace with hash 228336831, now seen corresponding path program 150 times [2021-07-13 19:35:47,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:47,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511353943] [2021-07-13 19:35:47,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:47,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:48,043 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 21 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:48,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:48,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511353943] [2021-07-13 19:35:48,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511353943] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:48,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269705716] [2021-07-13 19:35:48,044 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 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 [2021-07-13 19:35:48,070 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 19:35:48,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:48,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:35:48,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:48,105 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:48,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269705716] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:48,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:48,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-13 19:35:48,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107185301] [2021-07-13 19:35:48,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:35:48,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:48,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:35:48,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:35:48,106 INFO L87 Difference]: Start difference. First operand 19825 states and 70736 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:48,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:48,384 INFO L93 Difference]: Finished difference Result 20359 states and 72090 transitions. [2021-07-13 19:35:48,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:35:48,385 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:35:48,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:48,442 INFO L225 Difference]: With dead ends: 20359 [2021-07-13 19:35:48,442 INFO L226 Difference]: Without dead ends: 20355 [2021-07-13 19:35:48,443 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 151.7ms TimeCoverageRelationStatistics Valid=274, Invalid=538, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:35:48,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20355 states. [2021-07-13 19:35:48,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20355 to 19828. [2021-07-13 19:35:48,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19828 states, 19827 states have (on average 3.568215060271347) internal successors, (70747), 19827 states have internal predecessors, (70747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:48,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19828 states to 19828 states and 70747 transitions. [2021-07-13 19:35:48,984 INFO L78 Accepts]: Start accepts. Automaton has 19828 states and 70747 transitions. Word has length 22 [2021-07-13 19:35:48,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:48,984 INFO L482 AbstractCegarLoop]: Abstraction has 19828 states and 70747 transitions. [2021-07-13 19:35:48,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:48,985 INFO L276 IsEmpty]: Start isEmpty. Operand 19828 states and 70747 transitions. [2021-07-13 19:35:48,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:35:48,992 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:48,992 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:49,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21516,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:49,196 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:49,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:49,196 INFO L82 PathProgramCache]: Analyzing trace with hash 66738378, now seen corresponding path program 151 times [2021-07-13 19:35:49,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:49,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355482567] [2021-07-13 19:35:49,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:49,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:49,283 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:49,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:49,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355482567] [2021-07-13 19:35:49,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355482567] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:49,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359255917] [2021-07-13 19:35:49,284 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 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 [2021-07-13 19:35:49,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:49,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:35:49,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:49,348 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:49,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359255917] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:49,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:49,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-13 19:35:49,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866195035] [2021-07-13 19:35:49,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:35:49,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:49,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:35:49,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:35:49,348 INFO L87 Difference]: Start difference. First operand 19828 states and 70747 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:49,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:49,752 INFO L93 Difference]: Finished difference Result 28252 states and 100763 transitions. [2021-07-13 19:35:49,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:35:49,752 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:35:49,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:49,824 INFO L225 Difference]: With dead ends: 28252 [2021-07-13 19:35:49,824 INFO L226 Difference]: Without dead ends: 28252 [2021-07-13 19:35:49,825 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 105.8ms TimeCoverageRelationStatistics Valid=177, Invalid=329, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:35:49,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28252 states. [2021-07-13 19:35:50,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28252 to 19605. [2021-07-13 19:35:50,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19605 states, 19604 states have (on average 3.569118547235258) internal successors, (69969), 19604 states have internal predecessors, (69969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:50,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19605 states to 19605 states and 69969 transitions. [2021-07-13 19:35:50,424 INFO L78 Accepts]: Start accepts. Automaton has 19605 states and 69969 transitions. Word has length 22 [2021-07-13 19:35:50,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:50,424 INFO L482 AbstractCegarLoop]: Abstraction has 19605 states and 69969 transitions. [2021-07-13 19:35:50,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:50,424 INFO L276 IsEmpty]: Start isEmpty. Operand 19605 states and 69969 transitions. [2021-07-13 19:35:50,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:35:50,430 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:50,431 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:50,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21517,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:50,631 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:50,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:50,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1322428419, now seen corresponding path program 152 times [2021-07-13 19:35:50,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:50,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40335266] [2021-07-13 19:35:50,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:50,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:50,705 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:50,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:50,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40335266] [2021-07-13 19:35:50,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40335266] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:50,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146955007] [2021-07-13 19:35:50,706 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 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 [2021-07-13 19:35:50,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:35:50,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:50,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:35:50,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:50,765 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:50,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146955007] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:50,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:50,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-13 19:35:50,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396664797] [2021-07-13 19:35:50,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:35:50,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:50,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:35:50,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:35:50,766 INFO L87 Difference]: Start difference. First operand 19605 states and 69969 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:51,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:51,021 INFO L93 Difference]: Finished difference Result 20123 states and 71290 transitions. [2021-07-13 19:35:51,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:35:51,021 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:35:51,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:51,076 INFO L225 Difference]: With dead ends: 20123 [2021-07-13 19:35:51,076 INFO L226 Difference]: Without dead ends: 20118 [2021-07-13 19:35:51,077 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 154.2ms TimeCoverageRelationStatistics Valid=270, Invalid=542, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:35:51,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20118 states. [2021-07-13 19:35:51,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20118 to 19607. [2021-07-13 19:35:51,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19607 states, 19606 states have (on average 3.5691114964806694) internal successors, (69976), 19606 states have internal predecessors, (69976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:51,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19607 states to 19607 states and 69976 transitions. [2021-07-13 19:35:51,588 INFO L78 Accepts]: Start accepts. Automaton has 19607 states and 69976 transitions. Word has length 22 [2021-07-13 19:35:51,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:51,588 INFO L482 AbstractCegarLoop]: Abstraction has 19607 states and 69976 transitions. [2021-07-13 19:35:51,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:51,588 INFO L276 IsEmpty]: Start isEmpty. Operand 19607 states and 69976 transitions. [2021-07-13 19:35:51,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:35:51,595 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:51,595 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:51,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21518,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:51,796 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:51,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:51,796 INFO L82 PathProgramCache]: Analyzing trace with hash -439607888, now seen corresponding path program 153 times [2021-07-13 19:35:51,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:51,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293343464] [2021-07-13 19:35:51,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:51,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:51,873 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:51,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:51,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293343464] [2021-07-13 19:35:51,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293343464] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:51,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109202805] [2021-07-13 19:35:51,873 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 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 [2021-07-13 19:35:51,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 19:35:51,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:51,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:35:51,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:51,957 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:51,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109202805] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:51,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:51,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-13 19:35:51,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725674747] [2021-07-13 19:35:51,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:35:51,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:51,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:35:51,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:35:51,958 INFO L87 Difference]: Start difference. First operand 19607 states and 69976 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:52,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:52,229 INFO L93 Difference]: Finished difference Result 21427 states and 75723 transitions. [2021-07-13 19:35:52,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:35:52,229 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:35:52,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:52,429 INFO L225 Difference]: With dead ends: 21427 [2021-07-13 19:35:52,429 INFO L226 Difference]: Without dead ends: 21427 [2021-07-13 19:35:52,430 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 166.0ms TimeCoverageRelationStatistics Valid=276, Invalid=536, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:35:52,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21427 states. [2021-07-13 19:35:52,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21427 to 19699. [2021-07-13 19:35:52,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19699 states, 19698 states have (on average 3.572240836633161) internal successors, (70366), 19698 states have internal predecessors, (70366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:52,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19699 states to 19699 states and 70366 transitions. [2021-07-13 19:35:52,807 INFO L78 Accepts]: Start accepts. Automaton has 19699 states and 70366 transitions. Word has length 22 [2021-07-13 19:35:52,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:52,808 INFO L482 AbstractCegarLoop]: Abstraction has 19699 states and 70366 transitions. [2021-07-13 19:35:52,808 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:52,808 INFO L276 IsEmpty]: Start isEmpty. Operand 19699 states and 70366 transitions. [2021-07-13 19:35:52,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:35:52,815 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:52,815 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:53,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21519 [2021-07-13 19:35:53,016 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:53,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:53,016 INFO L82 PathProgramCache]: Analyzing trace with hash 879529279, now seen corresponding path program 154 times [2021-07-13 19:35:53,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:53,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498978851] [2021-07-13 19:35:53,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:53,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:53,236 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:53,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:53,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498978851] [2021-07-13 19:35:53,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498978851] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:53,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886990854] [2021-07-13 19:35:53,237 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 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 [2021-07-13 19:35:53,264 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:35:53,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:53,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:35:53,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:53,300 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:53,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886990854] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:53,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:53,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-13 19:35:53,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432007460] [2021-07-13 19:35:53,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:35:53,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:53,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:35:53,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:35:53,304 INFO L87 Difference]: Start difference. First operand 19699 states and 70366 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:53,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:53,584 INFO L93 Difference]: Finished difference Result 20188 states and 71639 transitions. [2021-07-13 19:35:53,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:35:53,584 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:35:53,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:53,636 INFO L225 Difference]: With dead ends: 20188 [2021-07-13 19:35:53,637 INFO L226 Difference]: Without dead ends: 20182 [2021-07-13 19:35:53,637 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 293.3ms TimeCoverageRelationStatistics Valid=268, Invalid=544, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:35:53,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20182 states. [2021-07-13 19:35:54,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20182 to 19713. [2021-07-13 19:35:54,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19713 states, 19712 states have (on average 3.571580762987013) internal successors, (70403), 19712 states have internal predecessors, (70403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:54,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19713 states to 19713 states and 70403 transitions. [2021-07-13 19:35:54,136 INFO L78 Accepts]: Start accepts. Automaton has 19713 states and 70403 transitions. Word has length 22 [2021-07-13 19:35:54,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:54,136 INFO L482 AbstractCegarLoop]: Abstraction has 19713 states and 70403 transitions. [2021-07-13 19:35:54,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:54,137 INFO L276 IsEmpty]: Start isEmpty. Operand 19713 states and 70403 transitions. [2021-07-13 19:35:54,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:35:54,143 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:54,143 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:54,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21520,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:54,344 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:54,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:54,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1043527050, now seen corresponding path program 155 times [2021-07-13 19:35:54,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:54,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986509487] [2021-07-13 19:35:54,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:54,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:54,438 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:54,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:54,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986509487] [2021-07-13 19:35:54,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986509487] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:54,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148572232] [2021-07-13 19:35:54,439 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 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 [2021-07-13 19:35:54,471 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:35:54,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:54,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:35:54,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:54,517 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:54,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148572232] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:54,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:54,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-13 19:35:54,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156003541] [2021-07-13 19:35:54,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:35:54,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:54,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:35:54,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:35:54,519 INFO L87 Difference]: Start difference. First operand 19713 states and 70403 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:54,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:54,938 INFO L93 Difference]: Finished difference Result 20611 states and 72663 transitions. [2021-07-13 19:35:54,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:35:54,938 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:35:54,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:54,987 INFO L225 Difference]: With dead ends: 20611 [2021-07-13 19:35:54,987 INFO L226 Difference]: Without dead ends: 20611 [2021-07-13 19:35:54,988 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 292.5ms TimeCoverageRelationStatistics Valid=455, Invalid=877, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:35:55,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20611 states. [2021-07-13 19:35:55,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20611 to 19594. [2021-07-13 19:35:55,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19594 states, 19593 states have (on average 3.5719389577910476) internal successors, (69985), 19593 states have internal predecessors, (69985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:55,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19594 states to 19594 states and 69985 transitions. [2021-07-13 19:35:55,481 INFO L78 Accepts]: Start accepts. Automaton has 19594 states and 69985 transitions. Word has length 22 [2021-07-13 19:35:55,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:55,481 INFO L482 AbstractCegarLoop]: Abstraction has 19594 states and 69985 transitions. [2021-07-13 19:35:55,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:55,482 INFO L276 IsEmpty]: Start isEmpty. Operand 19594 states and 69985 transitions. [2021-07-13 19:35:55,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:35:55,488 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:55,488 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:55,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21521 [2021-07-13 19:35:55,688 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:55,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:55,689 INFO L82 PathProgramCache]: Analyzing trace with hash 19812039, now seen corresponding path program 156 times [2021-07-13 19:35:55,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:55,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811463662] [2021-07-13 19:35:55,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:55,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:55,752 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:55,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:55,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811463662] [2021-07-13 19:35:55,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811463662] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:55,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054199892] [2021-07-13 19:35:55,753 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 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 [2021-07-13 19:35:55,778 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 19:35:55,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:55,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:35:55,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:55,825 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:35:55,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054199892] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:55,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:55,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:35:55,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605458990] [2021-07-13 19:35:55,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:35:55,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:55,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:35:55,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=121, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:35:55,827 INFO L87 Difference]: Start difference. First operand 19594 states and 69985 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:56,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:56,170 INFO L93 Difference]: Finished difference Result 19840 states and 70288 transitions. [2021-07-13 19:35:56,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:35:56,170 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:35:56,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:56,219 INFO L225 Difference]: With dead ends: 19840 [2021-07-13 19:35:56,219 INFO L226 Difference]: Without dead ends: 19840 [2021-07-13 19:35:56,219 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 83.3ms TimeCoverageRelationStatistics Valid=145, Invalid=197, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:35:56,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19840 states. [2021-07-13 19:35:56,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19840 to 19605. [2021-07-13 19:35:56,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19605 states, 19604 states have (on average 3.5676902672923894) internal successors, (69941), 19604 states have internal predecessors, (69941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:56,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19605 states to 19605 states and 69941 transitions. [2021-07-13 19:35:56,757 INFO L78 Accepts]: Start accepts. Automaton has 19605 states and 69941 transitions. Word has length 22 [2021-07-13 19:35:56,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:56,758 INFO L482 AbstractCegarLoop]: Abstraction has 19605 states and 69941 transitions. [2021-07-13 19:35:56,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:56,758 INFO L276 IsEmpty]: Start isEmpty. Operand 19605 states and 69941 transitions. [2021-07-13 19:35:56,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:35:56,764 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:56,764 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:56,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21522 [2021-07-13 19:35:56,965 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:56,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:56,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1103102172, now seen corresponding path program 157 times [2021-07-13 19:35:56,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:56,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236315583] [2021-07-13 19:35:56,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:56,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:57,026 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:57,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:57,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236315583] [2021-07-13 19:35:57,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236315583] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:57,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075054675] [2021-07-13 19:35:57,026 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 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 [2021-07-13 19:35:57,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:57,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:35:57,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:57,085 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:35:57,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075054675] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:57,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:57,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:35:57,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428770274] [2021-07-13 19:35:57,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:35:57,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:57,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:35:57,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=123, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:35:57,086 INFO L87 Difference]: Start difference. First operand 19605 states and 69941 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:57,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:57,326 INFO L93 Difference]: Finished difference Result 19868 states and 70319 transitions. [2021-07-13 19:35:57,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:35:57,327 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:35:57,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:57,377 INFO L225 Difference]: With dead ends: 19868 [2021-07-13 19:35:57,377 INFO L226 Difference]: Without dead ends: 19864 [2021-07-13 19:35:57,377 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 126.9ms TimeCoverageRelationStatistics Valid=241, Invalid=409, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:35:57,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19864 states. [2021-07-13 19:35:57,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19864 to 18102. [2021-07-13 19:35:57,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18102 states, 18101 states have (on average 3.551682227501243) internal successors, (64289), 18101 states have internal predecessors, (64289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:57,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18102 states to 18102 states and 64289 transitions. [2021-07-13 19:35:57,848 INFO L78 Accepts]: Start accepts. Automaton has 18102 states and 64289 transitions. Word has length 22 [2021-07-13 19:35:57,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:57,848 INFO L482 AbstractCegarLoop]: Abstraction has 18102 states and 64289 transitions. [2021-07-13 19:35:57,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:57,848 INFO L276 IsEmpty]: Start isEmpty. Operand 18102 states and 64289 transitions. [2021-07-13 19:35:57,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:35:57,855 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:57,855 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:58,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21523 [2021-07-13 19:35:58,055 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:58,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:58,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1759904349, now seen corresponding path program 158 times [2021-07-13 19:35:58,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:58,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924398125] [2021-07-13 19:35:58,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:58,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:58,129 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 30 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:58,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:58,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924398125] [2021-07-13 19:35:58,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924398125] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:58,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917118964] [2021-07-13 19:35:58,130 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 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 [2021-07-13 19:35:58,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:35:58,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:58,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:35:58,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:58,198 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:58,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917118964] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:58,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:58,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:35:58,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436016866] [2021-07-13 19:35:58,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:35:58,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:58,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:35:58,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=121, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:35:58,199 INFO L87 Difference]: Start difference. First operand 18102 states and 64289 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:58,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:58,430 INFO L93 Difference]: Finished difference Result 18321 states and 64608 transitions. [2021-07-13 19:35:58,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:35:58,431 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:35:58,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:58,475 INFO L225 Difference]: With dead ends: 18321 [2021-07-13 19:35:58,475 INFO L226 Difference]: Without dead ends: 18320 [2021-07-13 19:35:58,476 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 128.1ms TimeCoverageRelationStatistics Valid=243, Invalid=407, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:35:58,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18320 states. [2021-07-13 19:35:58,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18320 to 18102. [2021-07-13 19:35:58,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18102 states, 18101 states have (on average 3.5440583393182696) internal successors, (64151), 18101 states have internal predecessors, (64151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:58,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18102 states to 18102 states and 64151 transitions. [2021-07-13 19:35:58,935 INFO L78 Accepts]: Start accepts. Automaton has 18102 states and 64151 transitions. Word has length 22 [2021-07-13 19:35:58,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:58,935 INFO L482 AbstractCegarLoop]: Abstraction has 18102 states and 64151 transitions. [2021-07-13 19:35:58,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:58,935 INFO L276 IsEmpty]: Start isEmpty. Operand 18102 states and 64151 transitions. [2021-07-13 19:35:58,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:35:58,941 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:58,941 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:59,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21524 [2021-07-13 19:35:59,142 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:59,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:59,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1612644214, now seen corresponding path program 159 times [2021-07-13 19:35:59,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:59,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90665503] [2021-07-13 19:35:59,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:59,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:59,202 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 23 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:59,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:59,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90665503] [2021-07-13 19:35:59,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90665503] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:59,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085178410] [2021-07-13 19:35:59,202 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 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 [2021-07-13 19:35:59,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 19:35:59,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:59,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:35:59,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:59,269 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 29 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:59,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085178410] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:59,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:59,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:35:59,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690793421] [2021-07-13 19:35:59,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:35:59,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:59,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:35:59,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=123, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:35:59,270 INFO L87 Difference]: Start difference. First operand 18102 states and 64151 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:59,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:59,405 INFO L93 Difference]: Finished difference Result 18502 states and 64639 transitions. [2021-07-13 19:35:59,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:35:59,406 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:35:59,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:59,592 INFO L225 Difference]: With dead ends: 18502 [2021-07-13 19:35:59,593 INFO L226 Difference]: Without dead ends: 18502 [2021-07-13 19:35:59,593 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 64.8ms TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:35:59,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18502 states. [2021-07-13 19:35:59,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18502 to 18082. [2021-07-13 19:35:59,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18082 states, 18081 states have (on average 3.528565897903877) internal successors, (63800), 18081 states have internal predecessors, (63800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:59,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18082 states to 18082 states and 63800 transitions. [2021-07-13 19:35:59,942 INFO L78 Accepts]: Start accepts. Automaton has 18082 states and 63800 transitions. Word has length 22 [2021-07-13 19:35:59,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:59,942 INFO L482 AbstractCegarLoop]: Abstraction has 18082 states and 63800 transitions. [2021-07-13 19:35:59,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:59,943 INFO L276 IsEmpty]: Start isEmpty. Operand 18082 states and 63800 transitions. [2021-07-13 19:35:59,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:35:59,949 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:59,949 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:00,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21525,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:00,149 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:00,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:00,150 INFO L82 PathProgramCache]: Analyzing trace with hash -824449639, now seen corresponding path program 160 times [2021-07-13 19:36:00,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:00,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39484102] [2021-07-13 19:36:00,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:00,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:00,223 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:36:00,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:00,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39484102] [2021-07-13 19:36:00,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39484102] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:00,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796686187] [2021-07-13 19:36:00,224 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 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 [2021-07-13 19:36:00,247 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:36:00,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:00,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:36:00,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:00,286 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:36:00,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796686187] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:00,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:00,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-13 19:36:00,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433839297] [2021-07-13 19:36:00,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:36:00,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:00,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:36:00,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:36:00,287 INFO L87 Difference]: Start difference. First operand 18082 states and 63800 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:00,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:00,617 INFO L93 Difference]: Finished difference Result 18306 states and 64126 transitions. [2021-07-13 19:36:00,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:36:00,618 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:36:00,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:00,660 INFO L225 Difference]: With dead ends: 18306 [2021-07-13 19:36:00,660 INFO L226 Difference]: Without dead ends: 18304 [2021-07-13 19:36:00,660 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 223.5ms TimeCoverageRelationStatistics Valid=272, Invalid=484, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:36:00,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18304 states. [2021-07-13 19:36:00,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18304 to 18082. [2021-07-13 19:36:00,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18082 states, 18081 states have (on average 3.5282893645262985) internal successors, (63795), 18081 states have internal predecessors, (63795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:01,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18082 states to 18082 states and 63795 transitions. [2021-07-13 19:36:01,155 INFO L78 Accepts]: Start accepts. Automaton has 18082 states and 63795 transitions. Word has length 22 [2021-07-13 19:36:01,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:01,155 INFO L482 AbstractCegarLoop]: Abstraction has 18082 states and 63795 transitions. [2021-07-13 19:36:01,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:01,155 INFO L276 IsEmpty]: Start isEmpty. Operand 18082 states and 63795 transitions. [2021-07-13 19:36:01,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:36:01,161 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:01,162 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:01,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21526,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:01,363 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:01,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:01,363 INFO L82 PathProgramCache]: Analyzing trace with hash 953275748, now seen corresponding path program 161 times [2021-07-13 19:36:01,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:01,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627729584] [2021-07-13 19:36:01,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:01,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:01,427 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:36:01,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:01,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627729584] [2021-07-13 19:36:01,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627729584] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:01,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497268161] [2021-07-13 19:36:01,427 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 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 [2021-07-13 19:36:01,453 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:36:01,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:01,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:36:01,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:01,497 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:36:01,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497268161] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:01,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:01,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-13 19:36:01,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794204067] [2021-07-13 19:36:01,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:36:01,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:01,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:36:01,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:36:01,498 INFO L87 Difference]: Start difference. First operand 18082 states and 63795 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:01,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:01,637 INFO L93 Difference]: Finished difference Result 18305 states and 63748 transitions. [2021-07-13 19:36:01,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:36:01,637 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:36:01,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:01,679 INFO L225 Difference]: With dead ends: 18305 [2021-07-13 19:36:01,679 INFO L226 Difference]: Without dead ends: 18305 [2021-07-13 19:36:01,679 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 73.0ms TimeCoverageRelationStatistics Valid=119, Invalid=187, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:36:01,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18305 states. [2021-07-13 19:36:02,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18305 to 17477. [2021-07-13 19:36:02,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17477 states, 17476 states have (on average 3.5275806820782787) internal successors, (61648), 17476 states have internal predecessors, (61648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:02,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17477 states to 17477 states and 61648 transitions. [2021-07-13 19:36:02,170 INFO L78 Accepts]: Start accepts. Automaton has 17477 states and 61648 transitions. Word has length 22 [2021-07-13 19:36:02,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:02,170 INFO L482 AbstractCegarLoop]: Abstraction has 17477 states and 61648 transitions. [2021-07-13 19:36:02,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:02,170 INFO L276 IsEmpty]: Start isEmpty. Operand 17477 states and 61648 transitions. [2021-07-13 19:36:02,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:36:02,177 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:02,177 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:02,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21527,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:02,377 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:02,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:02,377 INFO L82 PathProgramCache]: Analyzing trace with hash 664955357, now seen corresponding path program 162 times [2021-07-13 19:36:02,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:02,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193911286] [2021-07-13 19:36:02,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:02,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:02,450 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 23 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:02,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:02,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193911286] [2021-07-13 19:36:02,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193911286] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:02,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727218626] [2021-07-13 19:36:02,450 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 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 [2021-07-13 19:36:02,478 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-13 19:36:02,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:02,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:36:02,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:02,518 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 26 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:02,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727218626] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:02,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:02,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-13 19:36:02,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57452442] [2021-07-13 19:36:02,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:36:02,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:02,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:36:02,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:36:02,518 INFO L87 Difference]: Start difference. First operand 17477 states and 61648 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:02,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:02,783 INFO L93 Difference]: Finished difference Result 17705 states and 61981 transitions. [2021-07-13 19:36:02,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:36:02,784 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:36:02,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:02,829 INFO L225 Difference]: With dead ends: 17705 [2021-07-13 19:36:02,829 INFO L226 Difference]: Without dead ends: 17702 [2021-07-13 19:36:02,829 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 148.3ms TimeCoverageRelationStatistics Valid=304, Invalid=566, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:36:02,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17702 states. [2021-07-13 19:36:03,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17702 to 17477. [2021-07-13 19:36:03,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17477 states, 17476 states have (on average 3.5272945754177156) internal successors, (61643), 17476 states have internal predecessors, (61643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:03,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17477 states to 17477 states and 61643 transitions. [2021-07-13 19:36:03,266 INFO L78 Accepts]: Start accepts. Automaton has 17477 states and 61643 transitions. Word has length 22 [2021-07-13 19:36:03,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:03,266 INFO L482 AbstractCegarLoop]: Abstraction has 17477 states and 61643 transitions. [2021-07-13 19:36:03,266 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:03,266 INFO L276 IsEmpty]: Start isEmpty. Operand 17477 states and 61643 transitions. [2021-07-13 19:36:03,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:36:03,272 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:03,273 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:03,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21528,164 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:03,473 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:03,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:03,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1107584054, now seen corresponding path program 163 times [2021-07-13 19:36:03,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:03,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785077886] [2021-07-13 19:36:03,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:03,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:03,552 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:03,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:03,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785077886] [2021-07-13 19:36:03,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785077886] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:03,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274013711] [2021-07-13 19:36:03,553 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 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 [2021-07-13 19:36:03,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:03,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:36:03,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:03,622 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:03,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274013711] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:03,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:03,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-13 19:36:03,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941714935] [2021-07-13 19:36:03,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:36:03,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:03,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:36:03,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:36:03,623 INFO L87 Difference]: Start difference. First operand 17477 states and 61643 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:03,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:03,793 INFO L93 Difference]: Finished difference Result 18492 states and 64177 transitions. [2021-07-13 19:36:03,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:36:03,794 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:36:03,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:03,842 INFO L225 Difference]: With dead ends: 18492 [2021-07-13 19:36:03,843 INFO L226 Difference]: Without dead ends: 18492 [2021-07-13 19:36:03,843 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 102.5ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:36:03,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18492 states. [2021-07-13 19:36:04,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18492 to 17534. [2021-07-13 19:36:04,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17534 states, 17533 states have (on average 3.5194205213026866) internal successors, (61706), 17533 states have internal predecessors, (61706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:04,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17534 states to 17534 states and 61706 transitions. [2021-07-13 19:36:04,349 INFO L78 Accepts]: Start accepts. Automaton has 17534 states and 61706 transitions. Word has length 22 [2021-07-13 19:36:04,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:04,349 INFO L482 AbstractCegarLoop]: Abstraction has 17534 states and 61706 transitions. [2021-07-13 19:36:04,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:04,349 INFO L276 IsEmpty]: Start isEmpty. Operand 17534 states and 61706 transitions. [2021-07-13 19:36:04,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:36:04,357 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:04,357 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:04,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21529,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:04,561 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:04,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:04,561 INFO L82 PathProgramCache]: Analyzing trace with hash -408130023, now seen corresponding path program 164 times [2021-07-13 19:36:04,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:04,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826062146] [2021-07-13 19:36:04,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:04,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:04,634 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 23 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:04,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:04,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826062146] [2021-07-13 19:36:04,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826062146] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:04,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689833151] [2021-07-13 19:36:04,634 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 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 [2021-07-13 19:36:04,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:36:04,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:04,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:36:04,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:04,700 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 26 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:04,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689833151] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:04,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:04,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-13 19:36:04,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660429822] [2021-07-13 19:36:04,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:36:04,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:04,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:36:04,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:36:04,701 INFO L87 Difference]: Start difference. First operand 17534 states and 61706 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:04,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:04,975 INFO L93 Difference]: Finished difference Result 18165 states and 63327 transitions. [2021-07-13 19:36:04,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:36:04,975 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:36:04,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:05,019 INFO L225 Difference]: With dead ends: 18165 [2021-07-13 19:36:05,019 INFO L226 Difference]: Without dead ends: 18161 [2021-07-13 19:36:05,020 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 161.7ms TimeCoverageRelationStatistics Valid=315, Invalid=615, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:36:05,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18161 states. [2021-07-13 19:36:05,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18161 to 17542. [2021-07-13 19:36:05,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17542 states, 17541 states have (on average 3.5194116641012485) internal successors, (61734), 17541 states have internal predecessors, (61734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:05,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17542 states to 17542 states and 61734 transitions. [2021-07-13 19:36:05,445 INFO L78 Accepts]: Start accepts. Automaton has 17542 states and 61734 transitions. Word has length 22 [2021-07-13 19:36:05,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:05,445 INFO L482 AbstractCegarLoop]: Abstraction has 17542 states and 61734 transitions. [2021-07-13 19:36:05,445 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:05,445 INFO L276 IsEmpty]: Start isEmpty. Operand 17542 states and 61734 transitions. [2021-07-13 19:36:05,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:36:05,451 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:05,451 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:05,651 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21530,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:05,652 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:05,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:05,652 INFO L82 PathProgramCache]: Analyzing trace with hash -569728476, now seen corresponding path program 165 times [2021-07-13 19:36:05,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:05,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077947597] [2021-07-13 19:36:05,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:05,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:05,721 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:05,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:05,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077947597] [2021-07-13 19:36:05,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077947597] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:05,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700718126] [2021-07-13 19:36:05,721 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 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 [2021-07-13 19:36:05,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 19:36:05,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:05,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:36:05,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:05,792 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:05,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700718126] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:05,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:05,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-13 19:36:05,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799568991] [2021-07-13 19:36:05,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:36:05,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:05,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:36:05,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:36:05,793 INFO L87 Difference]: Start difference. First operand 17542 states and 61734 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:05,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:05,996 INFO L93 Difference]: Finished difference Result 23520 states and 82630 transitions. [2021-07-13 19:36:05,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:36:05,996 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:36:05,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:06,056 INFO L225 Difference]: With dead ends: 23520 [2021-07-13 19:36:06,057 INFO L226 Difference]: Without dead ends: 23520 [2021-07-13 19:36:06,057 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 106.2ms TimeCoverageRelationStatistics Valid=178, Invalid=328, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:36:06,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23520 states. [2021-07-13 19:36:06,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23520 to 18797. [2021-07-13 19:36:06,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18797 states, 18796 states have (on average 3.5254309427537773) internal successors, (66264), 18796 states have internal predecessors, (66264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:06,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18797 states to 18797 states and 66264 transitions. [2021-07-13 19:36:06,565 INFO L78 Accepts]: Start accepts. Automaton has 18797 states and 66264 transitions. Word has length 22 [2021-07-13 19:36:06,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:06,565 INFO L482 AbstractCegarLoop]: Abstraction has 18797 states and 66264 transitions. [2021-07-13 19:36:06,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:06,566 INFO L276 IsEmpty]: Start isEmpty. Operand 18797 states and 66264 transitions. [2021-07-13 19:36:06,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:36:06,572 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:06,572 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:06,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21531 [2021-07-13 19:36:06,772 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:06,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:06,772 INFO L82 PathProgramCache]: Analyzing trace with hash 685961565, now seen corresponding path program 166 times [2021-07-13 19:36:06,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:06,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83052391] [2021-07-13 19:36:06,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:06,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:06,847 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:06,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:06,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83052391] [2021-07-13 19:36:06,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83052391] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:06,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805038857] [2021-07-13 19:36:06,848 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 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 [2021-07-13 19:36:06,873 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:36:06,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:06,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:36:06,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:06,922 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:06,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805038857] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:06,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:06,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-13 19:36:06,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452930357] [2021-07-13 19:36:06,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:36:06,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:06,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:36:06,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:36:06,923 INFO L87 Difference]: Start difference. First operand 18797 states and 66264 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:07,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:07,304 INFO L93 Difference]: Finished difference Result 19410 states and 67835 transitions. [2021-07-13 19:36:07,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:36:07,304 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:36:07,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:07,347 INFO L225 Difference]: With dead ends: 19410 [2021-07-13 19:36:07,347 INFO L226 Difference]: Without dead ends: 19405 [2021-07-13 19:36:07,347 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 168.0ms TimeCoverageRelationStatistics Valid=310, Invalid=620, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:36:07,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19405 states. [2021-07-13 19:36:07,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19405 to 18800. [2021-07-13 19:36:07,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18800 states, 18799 states have (on average 3.5254534815681686) internal successors, (66275), 18799 states have internal predecessors, (66275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:07,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18800 states to 18800 states and 66275 transitions. [2021-07-13 19:36:07,692 INFO L78 Accepts]: Start accepts. Automaton has 18800 states and 66275 transitions. Word has length 22 [2021-07-13 19:36:07,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:07,692 INFO L482 AbstractCegarLoop]: Abstraction has 18800 states and 66275 transitions. [2021-07-13 19:36:07,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:07,692 INFO L276 IsEmpty]: Start isEmpty. Operand 18800 states and 66275 transitions. [2021-07-13 19:36:07,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:36:07,698 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:07,698 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:07,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21532 [2021-07-13 19:36:07,899 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:07,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:07,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1076074742, now seen corresponding path program 167 times [2021-07-13 19:36:07,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:07,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444698734] [2021-07-13 19:36:07,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:07,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:07,972 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:07,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:07,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444698734] [2021-07-13 19:36:07,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444698734] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:07,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226923909] [2021-07-13 19:36:07,972 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 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 [2021-07-13 19:36:08,000 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-13 19:36:08,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:08,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:36:08,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:08,046 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:08,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226923909] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:08,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:08,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-13 19:36:08,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253930003] [2021-07-13 19:36:08,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:36:08,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:08,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:36:08,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:36:08,046 INFO L87 Difference]: Start difference. First operand 18800 states and 66275 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:08,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:08,359 INFO L93 Difference]: Finished difference Result 20745 states and 72560 transitions. [2021-07-13 19:36:08,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:36:08,359 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:36:08,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:08,404 INFO L225 Difference]: With dead ends: 20745 [2021-07-13 19:36:08,404 INFO L226 Difference]: Without dead ends: 20745 [2021-07-13 19:36:08,404 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 126.6ms TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:36:08,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20745 states. [2021-07-13 19:36:08,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20745 to 19637. [2021-07-13 19:36:08,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19637 states, 19636 states have (on average 3.5308616826237524) internal successors, (69332), 19636 states have internal predecessors, (69332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:08,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19637 states to 19637 states and 69332 transitions. [2021-07-13 19:36:08,783 INFO L78 Accepts]: Start accepts. Automaton has 19637 states and 69332 transitions. Word has length 22 [2021-07-13 19:36:08,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:08,783 INFO L482 AbstractCegarLoop]: Abstraction has 19637 states and 69332 transitions. [2021-07-13 19:36:08,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:08,783 INFO L276 IsEmpty]: Start isEmpty. Operand 19637 states and 69332 transitions. [2021-07-13 19:36:08,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:36:08,790 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:08,790 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:08,990 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21533 [2021-07-13 19:36:08,990 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:08,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:08,990 INFO L82 PathProgramCache]: Analyzing trace with hash 243062425, now seen corresponding path program 168 times [2021-07-13 19:36:08,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:08,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359902525] [2021-07-13 19:36:08,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:08,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:09,069 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:09,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:09,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359902525] [2021-07-13 19:36:09,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359902525] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:09,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090169690] [2021-07-13 19:36:09,069 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 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 [2021-07-13 19:36:09,097 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 19:36:09,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:09,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:36:09,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:09,146 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:09,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090169690] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:09,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:09,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-13 19:36:09,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714325942] [2021-07-13 19:36:09,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:36:09,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:09,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:36:09,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:36:09,147 INFO L87 Difference]: Start difference. First operand 19637 states and 69332 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:09,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:09,422 INFO L93 Difference]: Finished difference Result 20239 states and 70880 transitions. [2021-07-13 19:36:09,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:36:09,422 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:36:09,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:09,585 INFO L225 Difference]: With dead ends: 20239 [2021-07-13 19:36:09,585 INFO L226 Difference]: Without dead ends: 20233 [2021-07-13 19:36:09,585 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 175.7ms TimeCoverageRelationStatistics Valid=307, Invalid=623, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:36:09,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20233 states. [2021-07-13 19:36:09,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20233 to 19639. [2021-07-13 19:36:09,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19639 states, 19638 states have (on average 3.530858539566147) internal successors, (69339), 19638 states have internal predecessors, (69339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:09,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19639 states to 19639 states and 69339 transitions. [2021-07-13 19:36:09,952 INFO L78 Accepts]: Start accepts. Automaton has 19639 states and 69339 transitions. Word has length 22 [2021-07-13 19:36:09,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:09,952 INFO L482 AbstractCegarLoop]: Abstraction has 19639 states and 69339 transitions. [2021-07-13 19:36:09,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:09,952 INFO L276 IsEmpty]: Start isEmpty. Operand 19639 states and 69339 transitions. [2021-07-13 19:36:09,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:36:09,958 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:09,958 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:10,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21534 [2021-07-13 19:36:10,159 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:10,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:10,159 INFO L82 PathProgramCache]: Analyzing trace with hash 407060196, now seen corresponding path program 169 times [2021-07-13 19:36:10,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:10,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413183890] [2021-07-13 19:36:10,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:10,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:10,233 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:10,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:10,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413183890] [2021-07-13 19:36:10,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413183890] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:10,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616021303] [2021-07-13 19:36:10,234 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 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 [2021-07-13 19:36:10,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:10,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:36:10,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:10,305 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:10,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616021303] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:10,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:10,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-13 19:36:10,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637157949] [2021-07-13 19:36:10,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:36:10,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:10,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:36:10,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:36:10,306 INFO L87 Difference]: Start difference. First operand 19639 states and 69339 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:10,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:10,590 INFO L93 Difference]: Finished difference Result 20573 states and 71871 transitions. [2021-07-13 19:36:10,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:36:10,590 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:36:10,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:10,640 INFO L225 Difference]: With dead ends: 20573 [2021-07-13 19:36:10,640 INFO L226 Difference]: Without dead ends: 20573 [2021-07-13 19:36:10,640 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 199.9ms TimeCoverageRelationStatistics Valid=349, Invalid=707, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:36:10,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20573 states. [2021-07-13 19:36:11,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20573 to 19777. [2021-07-13 19:36:11,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19777 states, 19776 states have (on average 3.531806229773463) internal successors, (69845), 19776 states have internal predecessors, (69845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:11,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19777 states to 19777 states and 69845 transitions. [2021-07-13 19:36:11,121 INFO L78 Accepts]: Start accepts. Automaton has 19777 states and 69845 transitions. Word has length 22 [2021-07-13 19:36:11,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:11,121 INFO L482 AbstractCegarLoop]: Abstraction has 19777 states and 69845 transitions. [2021-07-13 19:36:11,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:11,121 INFO L276 IsEmpty]: Start isEmpty. Operand 19777 states and 69845 transitions. [2021-07-13 19:36:11,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:36:11,128 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:11,128 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:11,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21535 [2021-07-13 19:36:11,328 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:11,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:11,328 INFO L82 PathProgramCache]: Analyzing trace with hash -601909027, now seen corresponding path program 170 times [2021-07-13 19:36:11,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:11,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745652879] [2021-07-13 19:36:11,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:11,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:11,411 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:11,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:11,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745652879] [2021-07-13 19:36:11,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745652879] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:11,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546229962] [2021-07-13 19:36:11,412 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 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 [2021-07-13 19:36:11,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:36:11,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:11,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:36:11,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:11,495 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 38 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:11,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546229962] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:11,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:11,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-13 19:36:11,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128692311] [2021-07-13 19:36:11,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:36:11,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:11,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:36:11,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:36:11,497 INFO L87 Difference]: Start difference. First operand 19777 states and 69845 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:11,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:11,767 INFO L93 Difference]: Finished difference Result 20348 states and 71343 transitions. [2021-07-13 19:36:11,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:36:11,768 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:36:11,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:11,812 INFO L225 Difference]: With dead ends: 20348 [2021-07-13 19:36:11,813 INFO L226 Difference]: Without dead ends: 20341 [2021-07-13 19:36:11,813 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 186.5ms TimeCoverageRelationStatistics Valid=306, Invalid=624, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:36:11,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20341 states. [2021-07-13 19:36:12,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20341 to 19792. [2021-07-13 19:36:12,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19792 states, 19791 states have (on average 3.5310494669294124) internal successors, (69883), 19791 states have internal predecessors, (69883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:12,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19792 states to 19792 states and 69883 transitions. [2021-07-13 19:36:12,307 INFO L78 Accepts]: Start accepts. Automaton has 19792 states and 69883 transitions. Word has length 22 [2021-07-13 19:36:12,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:12,307 INFO L482 AbstractCegarLoop]: Abstraction has 19792 states and 69883 transitions. [2021-07-13 19:36:12,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:12,308 INFO L276 IsEmpty]: Start isEmpty. Operand 19792 states and 69883 transitions. [2021-07-13 19:36:12,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:36:12,314 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:12,314 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:12,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21536,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:12,514 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:12,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:12,515 INFO L82 PathProgramCache]: Analyzing trace with hash -860396982, now seen corresponding path program 171 times [2021-07-13 19:36:12,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:12,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428879466] [2021-07-13 19:36:12,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:12,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:12,634 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:12,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:12,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428879466] [2021-07-13 19:36:12,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428879466] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:12,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625203705] [2021-07-13 19:36:12,635 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 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 [2021-07-13 19:36:12,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 19:36:12,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:12,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:36:12,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:12,708 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:12,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625203705] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:12,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:12,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-13 19:36:12,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062670904] [2021-07-13 19:36:12,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:36:12,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:12,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:36:12,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:36:12,709 INFO L87 Difference]: Start difference. First operand 19792 states and 69883 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:13,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:13,107 INFO L93 Difference]: Finished difference Result 21105 states and 73563 transitions. [2021-07-13 19:36:13,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 19:36:13,107 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:36:13,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:13,164 INFO L225 Difference]: With dead ends: 21105 [2021-07-13 19:36:13,164 INFO L226 Difference]: Without dead ends: 21105 [2021-07-13 19:36:13,164 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 332.8ms TimeCoverageRelationStatistics Valid=644, Invalid=1248, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 19:36:13,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21105 states. [2021-07-13 19:36:13,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21105 to 20568. [2021-07-13 19:36:13,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20568 states, 20567 states have (on average 3.529051393008217) internal successors, (72582), 20567 states have internal predecessors, (72582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:13,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20568 states to 20568 states and 72582 transitions. [2021-07-13 19:36:13,684 INFO L78 Accepts]: Start accepts. Automaton has 20568 states and 72582 transitions. Word has length 22 [2021-07-13 19:36:13,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:13,685 INFO L482 AbstractCegarLoop]: Abstraction has 20568 states and 72582 transitions. [2021-07-13 19:36:13,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:13,685 INFO L276 IsEmpty]: Start isEmpty. Operand 20568 states and 72582 transitions. [2021-07-13 19:36:13,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:36:13,691 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:13,692 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:13,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21537,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:13,892 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:13,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:13,892 INFO L82 PathProgramCache]: Analyzing trace with hash 860487385, now seen corresponding path program 172 times [2021-07-13 19:36:13,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:13,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411773638] [2021-07-13 19:36:13,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:13,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:13,947 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 36 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:36:13,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:13,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411773638] [2021-07-13 19:36:13,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411773638] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:13,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042596942] [2021-07-13 19:36:13,947 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 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 [2021-07-13 19:36:13,973 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:36:13,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:13,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:36:13,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:14,028 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 43 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:36:14,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042596942] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:14,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:14,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-13 19:36:14,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477747547] [2021-07-13 19:36:14,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:36:14,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:14,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:36:14,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:36:14,029 INFO L87 Difference]: Start difference. First operand 20568 states and 72582 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:14,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:14,209 INFO L93 Difference]: Finished difference Result 20897 states and 73323 transitions. [2021-07-13 19:36:14,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:36:14,209 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:36:14,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:14,259 INFO L225 Difference]: With dead ends: 20897 [2021-07-13 19:36:14,260 INFO L226 Difference]: Without dead ends: 20897 [2021-07-13 19:36:14,260 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 90.3ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:36:14,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20897 states. [2021-07-13 19:36:14,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20897 to 20632. [2021-07-13 19:36:14,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20632 states, 20631 states have (on average 3.527991856914352) internal successors, (72786), 20631 states have internal predecessors, (72786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:14,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20632 states to 20632 states and 72786 transitions. [2021-07-13 19:36:14,674 INFO L78 Accepts]: Start accepts. Automaton has 20632 states and 72786 transitions. Word has length 22 [2021-07-13 19:36:14,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:14,675 INFO L482 AbstractCegarLoop]: Abstraction has 20632 states and 72786 transitions. [2021-07-13 19:36:14,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:14,675 INFO L276 IsEmpty]: Start isEmpty. Operand 20632 states and 72786 transitions. [2021-07-13 19:36:14,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:36:14,681 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:14,681 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:14,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21538,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:14,882 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:14,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:14,882 INFO L82 PathProgramCache]: Analyzing trace with hash 82743140, now seen corresponding path program 173 times [2021-07-13 19:36:14,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:14,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255169869] [2021-07-13 19:36:14,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:14,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:14,933 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:36:14,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:14,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255169869] [2021-07-13 19:36:14,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255169869] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:14,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469696066] [2021-07-13 19:36:14,934 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 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 [2021-07-13 19:36:14,960 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:36:14,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:14,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:36:14,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:15,127 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2021-07-13 19:36:15,147 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:36:15,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469696066] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:15,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:15,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-13 19:36:15,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790470222] [2021-07-13 19:36:15,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:36:15,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:15,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:36:15,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:36:15,148 INFO L87 Difference]: Start difference. First operand 20632 states and 72786 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:15,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:15,442 INFO L93 Difference]: Finished difference Result 25212 states and 88754 transitions. [2021-07-13 19:36:15,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:36:15,442 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:36:15,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:15,512 INFO L225 Difference]: With dead ends: 25212 [2021-07-13 19:36:15,512 INFO L226 Difference]: Without dead ends: 25208 [2021-07-13 19:36:15,512 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 135.6ms TimeCoverageRelationStatistics Valid=224, Invalid=426, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:36:15,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25208 states. [2021-07-13 19:36:15,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25208 to 23517. [2021-07-13 19:36:15,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23517 states, 23516 states have (on average 3.5353376424562) internal successors, (83137), 23516 states have internal predecessors, (83137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:16,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23517 states to 23517 states and 83137 transitions. [2021-07-13 19:36:16,052 INFO L78 Accepts]: Start accepts. Automaton has 23517 states and 83137 transitions. Word has length 22 [2021-07-13 19:36:16,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:16,052 INFO L482 AbstractCegarLoop]: Abstraction has 23517 states and 83137 transitions. [2021-07-13 19:36:16,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:16,052 INFO L276 IsEmpty]: Start isEmpty. Operand 23517 states and 83137 transitions. [2021-07-13 19:36:16,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:36:16,059 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:16,059 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:16,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21539,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:16,260 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:16,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:16,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1746631591, now seen corresponding path program 174 times [2021-07-13 19:36:16,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:16,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714534784] [2021-07-13 19:36:16,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:16,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:16,494 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:36:16,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:16,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714534784] [2021-07-13 19:36:16,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714534784] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:16,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335170310] [2021-07-13 19:36:16,494 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 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 [2021-07-13 19:36:16,520 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 19:36:16,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:16,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:36:16,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:16,554 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:36:16,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335170310] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:16,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:16,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-13 19:36:16,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606320077] [2021-07-13 19:36:16,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:36:16,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:16,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:36:16,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:36:16,555 INFO L87 Difference]: Start difference. First operand 23517 states and 83137 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:16,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:16,783 INFO L93 Difference]: Finished difference Result 23865 states and 84038 transitions. [2021-07-13 19:36:16,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:36:16,783 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:36:16,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:16,843 INFO L225 Difference]: With dead ends: 23865 [2021-07-13 19:36:16,843 INFO L226 Difference]: Without dead ends: 23861 [2021-07-13 19:36:16,843 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 113.1ms TimeCoverageRelationStatistics Valid=186, Invalid=366, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:36:16,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23861 states. [2021-07-13 19:36:17,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23861 to 23517. [2021-07-13 19:36:17,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23517 states, 23516 states have (on average 3.535252593978568) internal successors, (83135), 23516 states have internal predecessors, (83135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:17,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23517 states to 23517 states and 83135 transitions. [2021-07-13 19:36:17,517 INFO L78 Accepts]: Start accepts. Automaton has 23517 states and 83135 transitions. Word has length 22 [2021-07-13 19:36:17,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:17,517 INFO L482 AbstractCegarLoop]: Abstraction has 23517 states and 83135 transitions. [2021-07-13 19:36:17,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:17,517 INFO L276 IsEmpty]: Start isEmpty. Operand 23517 states and 83135 transitions. [2021-07-13 19:36:17,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:36:17,525 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:17,525 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:17,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21540 [2021-07-13 19:36:17,725 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:17,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:17,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1908230044, now seen corresponding path program 175 times [2021-07-13 19:36:17,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:17,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275272758] [2021-07-13 19:36:17,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:17,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:17,781 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:36:17,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:17,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275272758] [2021-07-13 19:36:17,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275272758] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:17,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501118664] [2021-07-13 19:36:17,782 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 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 [2021-07-13 19:36:17,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:17,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:36:17,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:17,845 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:36:17,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501118664] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:17,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:17,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-13 19:36:17,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939395649] [2021-07-13 19:36:17,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:36:17,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:17,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:36:17,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:36:17,846 INFO L87 Difference]: Start difference. First operand 23517 states and 83135 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:18,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:18,087 INFO L93 Difference]: Finished difference Result 26766 states and 93606 transitions. [2021-07-13 19:36:18,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:36:18,087 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:36:18,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:18,160 INFO L225 Difference]: With dead ends: 26766 [2021-07-13 19:36:18,160 INFO L226 Difference]: Without dead ends: 26766 [2021-07-13 19:36:18,160 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 116.1ms TimeCoverageRelationStatistics Valid=196, Invalid=356, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:36:18,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26766 states. [2021-07-13 19:36:18,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26766 to 26009. [2021-07-13 19:36:18,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26009 states, 26008 states have (on average 3.535912027068594) internal successors, (91962), 26008 states have internal predecessors, (91962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:18,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26009 states to 26009 states and 91962 transitions. [2021-07-13 19:36:18,864 INFO L78 Accepts]: Start accepts. Automaton has 26009 states and 91962 transitions. Word has length 22 [2021-07-13 19:36:18,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:18,864 INFO L482 AbstractCegarLoop]: Abstraction has 26009 states and 91962 transitions. [2021-07-13 19:36:18,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:18,864 INFO L276 IsEmpty]: Start isEmpty. Operand 26009 states and 91962 transitions. [2021-07-13 19:36:18,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:36:18,871 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:18,872 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:19,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21541 [2021-07-13 19:36:19,072 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:19,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:19,072 INFO L82 PathProgramCache]: Analyzing trace with hash -263496653, now seen corresponding path program 176 times [2021-07-13 19:36:19,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:19,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224616026] [2021-07-13 19:36:19,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:19,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:19,168 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 21 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:19,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:19,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224616026] [2021-07-13 19:36:19,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224616026] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:19,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088250156] [2021-07-13 19:36:19,169 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 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 [2021-07-13 19:36:19,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:36:19,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:19,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:36:19,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:19,237 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 23 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:36:19,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088250156] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:19,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:19,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:36:19,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968853017] [2021-07-13 19:36:19,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:36:19,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:19,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:36:19,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:36:19,239 INFO L87 Difference]: Start difference. First operand 26009 states and 91962 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:19,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:19,755 INFO L93 Difference]: Finished difference Result 26395 states and 92871 transitions. [2021-07-13 19:36:19,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:36:19,756 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:36:19,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:19,871 INFO L225 Difference]: With dead ends: 26395 [2021-07-13 19:36:19,871 INFO L226 Difference]: Without dead ends: 26391 [2021-07-13 19:36:19,871 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 153.3ms TimeCoverageRelationStatistics Valid=220, Invalid=430, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:36:19,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26391 states. [2021-07-13 19:36:20,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26391 to 26009. [2021-07-13 19:36:20,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26009 states, 26008 states have (on average 3.5357582282374653) internal successors, (91958), 26008 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) [2021-07-13 19:36:20,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26009 states to 26009 states and 91958 transitions. [2021-07-13 19:36:20,528 INFO L78 Accepts]: Start accepts. Automaton has 26009 states and 91958 transitions. Word has length 22 [2021-07-13 19:36:20,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:20,528 INFO L482 AbstractCegarLoop]: Abstraction has 26009 states and 91958 transitions. [2021-07-13 19:36:20,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:20,528 INFO L276 IsEmpty]: Start isEmpty. Operand 26009 states and 91958 transitions. [2021-07-13 19:36:20,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:36:20,535 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:20,536 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:20,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21542 [2021-07-13 19:36:20,736 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:20,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:20,736 INFO L82 PathProgramCache]: Analyzing trace with hash -425095106, now seen corresponding path program 177 times [2021-07-13 19:36:20,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:20,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277600786] [2021-07-13 19:36:20,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:20,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:20,797 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:20,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:20,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277600786] [2021-07-13 19:36:20,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277600786] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:20,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245775212] [2021-07-13 19:36:20,797 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 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 [2021-07-13 19:36:20,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 19:36:20,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:20,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:36:20,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:20,863 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:36:20,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245775212] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:20,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:20,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:36:20,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284638761] [2021-07-13 19:36:20,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:36:20,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:20,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:36:20,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:36:20,864 INFO L87 Difference]: Start difference. First operand 26009 states and 91958 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:21,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:21,127 INFO L93 Difference]: Finished difference Result 28931 states and 100786 transitions. [2021-07-13 19:36:21,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:36:21,128 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:36:21,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:21,408 INFO L225 Difference]: With dead ends: 28931 [2021-07-13 19:36:21,408 INFO L226 Difference]: Without dead ends: 28931 [2021-07-13 19:36:21,409 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 119.5ms TimeCoverageRelationStatistics Valid=215, Invalid=385, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:36:21,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28931 states. [2021-07-13 19:36:21,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28931 to 25132. [2021-07-13 19:36:22,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25132 states, 25131 states have (on average 3.5305399705542957) internal successors, (88726), 25131 states have internal predecessors, (88726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:22,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25132 states to 25132 states and 88726 transitions. [2021-07-13 19:36:22,097 INFO L78 Accepts]: Start accepts. Automaton has 25132 states and 88726 transitions. Word has length 22 [2021-07-13 19:36:22,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:22,097 INFO L482 AbstractCegarLoop]: Abstraction has 25132 states and 88726 transitions. [2021-07-13 19:36:22,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:22,097 INFO L276 IsEmpty]: Start isEmpty. Operand 25132 states and 88726 transitions. [2021-07-13 19:36:22,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:36:22,105 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:22,105 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:22,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21543 [2021-07-13 19:36:22,306 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:22,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:22,306 INFO L82 PathProgramCache]: Analyzing trace with hash 830594935, now seen corresponding path program 178 times [2021-07-13 19:36:22,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:22,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055510907] [2021-07-13 19:36:22,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:22,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:22,373 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:22,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:22,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055510907] [2021-07-13 19:36:22,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055510907] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:22,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113957691] [2021-07-13 19:36:22,373 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 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 [2021-07-13 19:36:22,398 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:36:22,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:22,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:36:22,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:22,434 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:36:22,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113957691] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:22,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:22,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:36:22,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633412286] [2021-07-13 19:36:22,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:36:22,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:22,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:36:22,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:36:22,435 INFO L87 Difference]: Start difference. First operand 25132 states and 88726 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:22,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:22,741 INFO L93 Difference]: Finished difference Result 25641 states and 90061 transitions. [2021-07-13 19:36:22,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:36:22,742 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:36:22,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:22,810 INFO L225 Difference]: With dead ends: 25641 [2021-07-13 19:36:22,810 INFO L226 Difference]: Without dead ends: 25636 [2021-07-13 19:36:22,810 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 149.3ms TimeCoverageRelationStatistics Valid=251, Invalid=505, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:36:22,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25636 states. [2021-07-13 19:36:23,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25636 to 25153. [2021-07-13 19:36:23,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25153 states, 25152 states have (on average 3.530017493638677) internal successors, (88787), 25152 states have internal predecessors, (88787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:23,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25153 states to 25153 states and 88787 transitions. [2021-07-13 19:36:23,480 INFO L78 Accepts]: Start accepts. Automaton has 25153 states and 88787 transitions. Word has length 22 [2021-07-13 19:36:23,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:23,480 INFO L482 AbstractCegarLoop]: Abstraction has 25153 states and 88787 transitions. [2021-07-13 19:36:23,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:23,480 INFO L276 IsEmpty]: Start isEmpty. Operand 25153 states and 88787 transitions. [2021-07-13 19:36:23,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:36:23,488 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:23,488 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:23,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21544 [2021-07-13 19:36:23,688 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:23,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:23,689 INFO L82 PathProgramCache]: Analyzing trace with hash -931441372, now seen corresponding path program 179 times [2021-07-13 19:36:23,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:23,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441883083] [2021-07-13 19:36:23,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:23,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:23,755 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:23,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:23,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441883083] [2021-07-13 19:36:23,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441883083] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:23,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605186696] [2021-07-13 19:36:23,756 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 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 [2021-07-13 19:36:23,783 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:36:23,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:23,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:36:23,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:24,000 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:36:24,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605186696] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:24,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:24,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:36:24,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394484227] [2021-07-13 19:36:24,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:36:24,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:24,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:36:24,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:36:24,001 INFO L87 Difference]: Start difference. First operand 25153 states and 88787 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:24,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:24,313 INFO L93 Difference]: Finished difference Result 28403 states and 99337 transitions. [2021-07-13 19:36:24,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:36:24,314 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:36:24,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:24,381 INFO L225 Difference]: With dead ends: 28403 [2021-07-13 19:36:24,381 INFO L226 Difference]: Without dead ends: 28403 [2021-07-13 19:36:24,381 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 336.6ms TimeCoverageRelationStatistics Valid=302, Invalid=568, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:36:24,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28403 states. [2021-07-13 19:36:24,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28403 to 27756. [2021-07-13 19:36:25,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27756 states, 27755 states have (on average 3.5323365159430735) internal successors, (98040), 27755 states have internal predecessors, (98040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:25,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27756 states to 27756 states and 98040 transitions. [2021-07-13 19:36:25,098 INFO L78 Accepts]: Start accepts. Automaton has 27756 states and 98040 transitions. Word has length 22 [2021-07-13 19:36:25,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:25,098 INFO L482 AbstractCegarLoop]: Abstraction has 27756 states and 98040 transitions. [2021-07-13 19:36:25,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:25,098 INFO L276 IsEmpty]: Start isEmpty. Operand 27756 states and 98040 transitions. [2021-07-13 19:36:25,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:36:25,107 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:25,107 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:25,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21545 [2021-07-13 19:36:25,307 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:25,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:25,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1530953831, now seen corresponding path program 180 times [2021-07-13 19:36:25,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:25,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146822138] [2021-07-13 19:36:25,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:25,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:25,376 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 20 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:25,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:25,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146822138] [2021-07-13 19:36:25,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146822138] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:25,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035240717] [2021-07-13 19:36:25,377 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 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 [2021-07-13 19:36:25,404 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 19:36:25,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:25,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:36:25,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:25,438 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 22 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:25,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035240717] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:25,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:25,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-13 19:36:25,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298797412] [2021-07-13 19:36:25,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:36:25,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:25,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:36:25,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:36:25,439 INFO L87 Difference]: Start difference. First operand 27756 states and 98040 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:25,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:25,840 INFO L93 Difference]: Finished difference Result 28254 states and 99257 transitions. [2021-07-13 19:36:25,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:36:25,840 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:36:25,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:25,921 INFO L225 Difference]: With dead ends: 28254 [2021-07-13 19:36:25,921 INFO L226 Difference]: Without dead ends: 28250 [2021-07-13 19:36:25,921 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 135.7ms TimeCoverageRelationStatistics Valid=257, Invalid=499, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:36:25,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28250 states. [2021-07-13 19:36:26,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28250 to 27756. [2021-07-13 19:36:26,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27756 states, 27755 states have (on average 3.5321203386777156) internal successors, (98034), 27755 states have internal predecessors, (98034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:26,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27756 states to 27756 states and 98034 transitions. [2021-07-13 19:36:26,614 INFO L78 Accepts]: Start accepts. Automaton has 27756 states and 98034 transitions. Word has length 22 [2021-07-13 19:36:26,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:26,614 INFO L482 AbstractCegarLoop]: Abstraction has 27756 states and 98034 transitions. [2021-07-13 19:36:26,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:26,614 INFO L276 IsEmpty]: Start isEmpty. Operand 27756 states and 98034 transitions. [2021-07-13 19:36:26,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:36:26,622 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:26,623 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:26,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21546,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:26,841 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:26,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:26,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1692552284, now seen corresponding path program 181 times [2021-07-13 19:36:26,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:26,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998696144] [2021-07-13 19:36:26,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:26,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:26,906 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:26,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:26,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998696144] [2021-07-13 19:36:26,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998696144] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:26,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92283399] [2021-07-13 19:36:26,906 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 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 [2021-07-13 19:36:26,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:26,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:36:26,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:26,977 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:26,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92283399] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:26,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:26,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-13 19:36:26,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098339603] [2021-07-13 19:36:26,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:36:26,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:26,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:36:26,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:36:26,978 INFO L87 Difference]: Start difference. First operand 27756 states and 98034 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:27,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:27,447 INFO L93 Difference]: Finished difference Result 30857 states and 107254 transitions. [2021-07-13 19:36:27,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:36:27,447 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:36:27,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:27,530 INFO L225 Difference]: With dead ends: 30857 [2021-07-13 19:36:27,530 INFO L226 Difference]: Without dead ends: 30857 [2021-07-13 19:36:27,530 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 127.0ms TimeCoverageRelationStatistics Valid=235, Invalid=415, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:36:27,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30857 states. [2021-07-13 19:36:28,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30857 to 22798. [2021-07-13 19:36:28,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22798 states, 22797 states have (on average 3.5037943589068736) internal successors, (79876), 22797 states have internal predecessors, (79876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:28,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22798 states to 22798 states and 79876 transitions. [2021-07-13 19:36:28,163 INFO L78 Accepts]: Start accepts. Automaton has 22798 states and 79876 transitions. Word has length 22 [2021-07-13 19:36:28,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:28,163 INFO L482 AbstractCegarLoop]: Abstraction has 22798 states and 79876 transitions. [2021-07-13 19:36:28,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:28,163 INFO L276 IsEmpty]: Start isEmpty. Operand 22798 states and 79876 transitions. [2021-07-13 19:36:28,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:36:28,170 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:28,170 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:28,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21547 [2021-07-13 19:36:28,371 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:28,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:28,371 INFO L82 PathProgramCache]: Analyzing trace with hash -436862243, now seen corresponding path program 182 times [2021-07-13 19:36:28,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:28,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445235186] [2021-07-13 19:36:28,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:28,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:28,442 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 23 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:28,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:28,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445235186] [2021-07-13 19:36:28,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445235186] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:28,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59737170] [2021-07-13 19:36:28,443 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 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 [2021-07-13 19:36:28,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:36:28,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:28,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:36:28,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:28,503 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:28,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59737170] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:28,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:28,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-13 19:36:28,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535538756] [2021-07-13 19:36:28,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:36:28,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:28,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:36:28,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:36:28,504 INFO L87 Difference]: Start difference. First operand 22798 states and 79876 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:28,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:28,790 INFO L93 Difference]: Finished difference Result 23497 states and 81715 transitions. [2021-07-13 19:36:28,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:36:28,791 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:36:28,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:28,848 INFO L225 Difference]: With dead ends: 23497 [2021-07-13 19:36:28,848 INFO L226 Difference]: Without dead ends: 23492 [2021-07-13 19:36:28,849 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 159.6ms TimeCoverageRelationStatistics Valid=289, Invalid=581, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:36:28,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23492 states. [2021-07-13 19:36:29,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23492 to 22804. [2021-07-13 19:36:29,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22804 states, 22803 states have (on average 3.5038810682804895) internal successors, (79899), 22803 states have internal predecessors, (79899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:29,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22804 states to 22804 states and 79899 transitions. [2021-07-13 19:36:29,433 INFO L78 Accepts]: Start accepts. Automaton has 22804 states and 79899 transitions. Word has length 22 [2021-07-13 19:36:29,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:29,433 INFO L482 AbstractCegarLoop]: Abstraction has 22804 states and 79899 transitions. [2021-07-13 19:36:29,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:29,434 INFO L276 IsEmpty]: Start isEmpty. Operand 22804 states and 79899 transitions. [2021-07-13 19:36:29,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:36:29,441 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:29,441 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:29,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21548,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:29,641 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:29,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:29,641 INFO L82 PathProgramCache]: Analyzing trace with hash 2096068746, now seen corresponding path program 183 times [2021-07-13 19:36:29,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:29,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168119651] [2021-07-13 19:36:29,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:29,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:29,709 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:29,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:29,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168119651] [2021-07-13 19:36:29,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168119651] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:29,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108080568] [2021-07-13 19:36:29,709 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 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 [2021-07-13 19:36:29,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 19:36:29,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:29,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:36:29,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:29,775 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:29,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108080568] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:29,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:29,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-13 19:36:29,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481122437] [2021-07-13 19:36:29,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:36:29,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:29,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:36:29,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:36:29,776 INFO L87 Difference]: Start difference. First operand 22804 states and 79899 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:30,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:30,182 INFO L93 Difference]: Finished difference Result 26246 states and 91100 transitions. [2021-07-13 19:36:30,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:36:30,183 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:36:30,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:30,251 INFO L225 Difference]: With dead ends: 26246 [2021-07-13 19:36:30,251 INFO L226 Difference]: Without dead ends: 26246 [2021-07-13 19:36:30,251 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 156.7ms TimeCoverageRelationStatistics Valid=275, Invalid=537, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:36:30,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26246 states. [2021-07-13 19:36:30,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26246 to 22958. [2021-07-13 19:36:30,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22958 states, 22957 states have (on average 3.504072831816004) internal successors, (80443), 22957 states have internal predecessors, (80443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:30,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22958 states to 22958 states and 80443 transitions. [2021-07-13 19:36:30,834 INFO L78 Accepts]: Start accepts. Automaton has 22958 states and 80443 transitions. Word has length 22 [2021-07-13 19:36:30,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:30,834 INFO L482 AbstractCegarLoop]: Abstraction has 22958 states and 80443 transitions. [2021-07-13 19:36:30,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:30,834 INFO L276 IsEmpty]: Start isEmpty. Operand 22958 states and 80443 transitions. [2021-07-13 19:36:30,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:36:30,841 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:30,841 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:31,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21549,185 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:31,042 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:31,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:31,042 INFO L82 PathProgramCache]: Analyzing trace with hash -879761383, now seen corresponding path program 184 times [2021-07-13 19:36:31,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:31,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269620227] [2021-07-13 19:36:31,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:31,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:31,117 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:31,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:31,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269620227] [2021-07-13 19:36:31,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269620227] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:31,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108891584] [2021-07-13 19:36:31,117 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 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 [2021-07-13 19:36:31,142 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:36:31,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:31,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:36:31,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:31,177 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 30 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:31,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108891584] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:31,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:31,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-13 19:36:31,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58153046] [2021-07-13 19:36:31,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:36:31,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:31,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:36:31,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:36:31,178 INFO L87 Difference]: Start difference. First operand 22958 states and 80443 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:31,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:31,467 INFO L93 Difference]: Finished difference Result 23615 states and 82201 transitions. [2021-07-13 19:36:31,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:36:31,468 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:36:31,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:31,527 INFO L225 Difference]: With dead ends: 23615 [2021-07-13 19:36:31,527 INFO L226 Difference]: Without dead ends: 23609 [2021-07-13 19:36:31,527 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 168.1ms TimeCoverageRelationStatistics Valid=288, Invalid=582, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:36:31,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23609 states. [2021-07-13 19:36:32,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23609 to 22976. [2021-07-13 19:36:32,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22976 states, 22975 states have (on average 3.503808487486398) internal successors, (80500), 22975 states have internal predecessors, (80500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:32,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22976 states to 22976 states and 80500 transitions. [2021-07-13 19:36:32,136 INFO L78 Accepts]: Start accepts. Automaton has 22976 states and 80500 transitions. Word has length 22 [2021-07-13 19:36:32,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:32,136 INFO L482 AbstractCegarLoop]: Abstraction has 22976 states and 80500 transitions. [2021-07-13 19:36:32,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:32,136 INFO L276 IsEmpty]: Start isEmpty. Operand 22976 states and 80500 transitions. [2021-07-13 19:36:32,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:36:32,143 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:32,143 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:32,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21550,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:32,344 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:32,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:32,344 INFO L82 PathProgramCache]: Analyzing trace with hash -715763612, now seen corresponding path program 185 times [2021-07-13 19:36:32,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:32,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835708088] [2021-07-13 19:36:32,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:32,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:32,415 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:32,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:32,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835708088] [2021-07-13 19:36:32,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835708088] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:32,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205030399] [2021-07-13 19:36:32,416 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 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 [2021-07-13 19:36:32,442 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:36:32,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:32,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:36:32,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:32,587 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-07-13 19:36:32,619 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:32,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205030399] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:32,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:32,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-13 19:36:32,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024692502] [2021-07-13 19:36:32,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:36:32,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:32,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:36:32,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:36:32,620 INFO L87 Difference]: Start difference. First operand 22976 states and 80500 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:32,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:32,973 INFO L93 Difference]: Finished difference Result 24953 states and 86530 transitions. [2021-07-13 19:36:32,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:36:32,973 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:36:32,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:33,038 INFO L225 Difference]: With dead ends: 24953 [2021-07-13 19:36:33,038 INFO L226 Difference]: Without dead ends: 24953 [2021-07-13 19:36:33,038 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 231.7ms TimeCoverageRelationStatistics Valid=454, Invalid=878, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:36:33,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24953 states. [2021-07-13 19:36:33,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24953 to 24405. [2021-07-13 19:36:33,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24405 states, 24404 states have (on average 3.5054499262416) internal successors, (85547), 24404 states have internal predecessors, (85547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:33,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24405 states to 24405 states and 85547 transitions. [2021-07-13 19:36:33,621 INFO L78 Accepts]: Start accepts. Automaton has 24405 states and 85547 transitions. Word has length 22 [2021-07-13 19:36:33,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:33,622 INFO L482 AbstractCegarLoop]: Abstraction has 24405 states and 85547 transitions. [2021-07-13 19:36:33,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:33,622 INFO L276 IsEmpty]: Start isEmpty. Operand 24405 states and 85547 transitions. [2021-07-13 19:36:33,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:36:33,629 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:33,629 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:33,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21551,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:33,830 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:33,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:33,830 INFO L82 PathProgramCache]: Analyzing trace with hash 2127546611, now seen corresponding path program 186 times [2021-07-13 19:36:33,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:33,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573691127] [2021-07-13 19:36:33,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:33,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:33,912 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 21 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:33,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:33,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573691127] [2021-07-13 19:36:33,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573691127] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:33,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614212610] [2021-07-13 19:36:33,913 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 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 [2021-07-13 19:36:33,943 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 19:36:33,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:33,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:36:33,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:33,984 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 23 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:33,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614212610] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:33,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:33,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-13 19:36:33,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510642010] [2021-07-13 19:36:33,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:36:33,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:33,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:36:33,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:36:33,985 INFO L87 Difference]: Start difference. First operand 24405 states and 85547 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:34,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:34,390 INFO L93 Difference]: Finished difference Result 24826 states and 86467 transitions. [2021-07-13 19:36:34,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:36:34,390 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:36:34,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:34,451 INFO L225 Difference]: With dead ends: 24826 [2021-07-13 19:36:34,451 INFO L226 Difference]: Without dead ends: 24822 [2021-07-13 19:36:34,452 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 160.2ms TimeCoverageRelationStatistics Valid=297, Invalid=573, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:36:34,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24822 states. [2021-07-13 19:36:34,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24822 to 24405. [2021-07-13 19:36:34,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24405 states, 24404 states have (on average 3.5052860186854615) internal successors, (85543), 24404 states have internal predecessors, (85543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:35,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24405 states to 24405 states and 85543 transitions. [2021-07-13 19:36:35,071 INFO L78 Accepts]: Start accepts. Automaton has 24405 states and 85543 transitions. Word has length 22 [2021-07-13 19:36:35,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:35,071 INFO L482 AbstractCegarLoop]: Abstraction has 24405 states and 85543 transitions. [2021-07-13 19:36:35,071 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:35,071 INFO L276 IsEmpty]: Start isEmpty. Operand 24405 states and 85543 transitions. [2021-07-13 19:36:35,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:36:35,078 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:35,079 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:35,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21552 [2021-07-13 19:36:35,279 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:35,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:35,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1965948158, now seen corresponding path program 187 times [2021-07-13 19:36:35,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:35,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220723510] [2021-07-13 19:36:35,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:35,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:35,346 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:35,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:35,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220723510] [2021-07-13 19:36:35,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220723510] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:35,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180226962] [2021-07-13 19:36:35,346 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 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 [2021-07-13 19:36:35,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:35,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:36:35,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:35,416 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:35,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180226962] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:35,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:35,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-13 19:36:35,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610452211] [2021-07-13 19:36:35,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:36:35,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:35,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:36:35,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:36:35,417 INFO L87 Difference]: Start difference. First operand 24405 states and 85543 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:35,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:35,654 INFO L93 Difference]: Finished difference Result 25900 states and 89533 transitions. [2021-07-13 19:36:35,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:36:35,654 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:36:35,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:35,721 INFO L225 Difference]: With dead ends: 25900 [2021-07-13 19:36:35,721 INFO L226 Difference]: Without dead ends: 25900 [2021-07-13 19:36:35,722 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 125.5ms TimeCoverageRelationStatistics Valid=237, Invalid=413, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:36:35,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25900 states. [2021-07-13 19:36:36,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25900 to 18287. [2021-07-13 19:36:36,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18287 states, 18286 states have (on average 3.4808596740675926) internal successors, (63651), 18286 states have internal predecessors, (63651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:36,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18287 states to 18287 states and 63651 transitions. [2021-07-13 19:36:36,282 INFO L78 Accepts]: Start accepts. Automaton has 18287 states and 63651 transitions. Word has length 22 [2021-07-13 19:36:36,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:36,282 INFO L482 AbstractCegarLoop]: Abstraction has 18287 states and 63651 transitions. [2021-07-13 19:36:36,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:36,282 INFO L276 IsEmpty]: Start isEmpty. Operand 18287 states and 63651 transitions. [2021-07-13 19:36:36,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:36:36,288 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:36,288 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:36,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21553,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:36,493 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:36,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:36,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1073329097, now seen corresponding path program 188 times [2021-07-13 19:36:36,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:36,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903385124] [2021-07-13 19:36:36,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:36,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:36,565 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 23 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:36,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:36,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903385124] [2021-07-13 19:36:36,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903385124] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:36,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182802057] [2021-07-13 19:36:36,566 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 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 [2021-07-13 19:36:36,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:36:36,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:36,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:36:36,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:36,633 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:36,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182802057] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:36,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:36,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-13 19:36:36,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839013781] [2021-07-13 19:36:36,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:36:36,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:36,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:36:36,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:36:36,634 INFO L87 Difference]: Start difference. First operand 18287 states and 63651 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:37,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:37,081 INFO L93 Difference]: Finished difference Result 19111 states and 65822 transitions. [2021-07-13 19:36:37,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:36:37,082 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:36:37,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:37,120 INFO L225 Difference]: With dead ends: 19111 [2021-07-13 19:36:37,120 INFO L226 Difference]: Without dead ends: 19106 [2021-07-13 19:36:37,120 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 175.9ms TimeCoverageRelationStatistics Valid=330, Invalid=662, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:36:37,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19106 states. [2021-07-13 19:36:37,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19106 to 18296. [2021-07-13 19:36:37,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18296 states, 18295 states have (on average 3.4810057392730256) internal successors, (63685), 18295 states have internal predecessors, (63685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:37,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18296 states to 18296 states and 63685 transitions. [2021-07-13 19:36:37,489 INFO L78 Accepts]: Start accepts. Automaton has 18296 states and 63685 transitions. Word has length 22 [2021-07-13 19:36:37,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:37,489 INFO L482 AbstractCegarLoop]: Abstraction has 18296 states and 63685 transitions. [2021-07-13 19:36:37,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:37,489 INFO L276 IsEmpty]: Start isEmpty. Operand 18296 states and 63685 transitions. [2021-07-13 19:36:37,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:36:37,497 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:37,497 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:37,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21554 [2021-07-13 19:36:37,698 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:37,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:37,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1459601892, now seen corresponding path program 189 times [2021-07-13 19:36:37,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:37,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415033383] [2021-07-13 19:36:37,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:37,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:37,904 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:37,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:37,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415033383] [2021-07-13 19:36:37,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415033383] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:37,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221391737] [2021-07-13 19:36:37,904 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 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 [2021-07-13 19:36:37,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 19:36:37,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:37,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:36:37,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:38,003 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:38,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221391737] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:38,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:38,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-13 19:36:38,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143847272] [2021-07-13 19:36:38,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:36:38,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:38,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:36:38,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:36:38,004 INFO L87 Difference]: Start difference. First operand 18296 states and 63685 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:38,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:38,292 INFO L93 Difference]: Finished difference Result 22104 states and 76218 transitions. [2021-07-13 19:36:38,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:36:38,293 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:36:38,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:38,345 INFO L225 Difference]: With dead ends: 22104 [2021-07-13 19:36:38,345 INFO L226 Difference]: Without dead ends: 22104 [2021-07-13 19:36:38,345 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 293.2ms TimeCoverageRelationStatistics Valid=239, Invalid=463, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:36:38,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22104 states. [2021-07-13 19:36:38,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22104 to 17879. [2021-07-13 19:36:38,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17879 states, 17878 states have (on average 3.4820449714733193) internal successors, (62252), 17878 states have internal predecessors, (62252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:38,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17879 states to 17879 states and 62252 transitions. [2021-07-13 19:36:38,829 INFO L78 Accepts]: Start accepts. Automaton has 17879 states and 62252 transitions. Word has length 22 [2021-07-13 19:36:38,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:38,829 INFO L482 AbstractCegarLoop]: Abstraction has 17879 states and 62252 transitions. [2021-07-13 19:36:38,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:38,829 INFO L276 IsEmpty]: Start isEmpty. Operand 17879 states and 62252 transitions. [2021-07-13 19:36:38,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:36:38,835 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:38,835 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:39,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21555 [2021-07-13 19:36:39,036 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:39,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:39,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1516228237, now seen corresponding path program 190 times [2021-07-13 19:36:39,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:39,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621916762] [2021-07-13 19:36:39,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:39,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:39,115 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:39,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:39,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621916762] [2021-07-13 19:36:39,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621916762] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:39,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126816658] [2021-07-13 19:36:39,115 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 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 [2021-07-13 19:36:39,140 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:36:39,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:39,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:36:39,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:39,183 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:39,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126816658] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:39,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:39,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-13 19:36:39,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292667172] [2021-07-13 19:36:39,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:36:39,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:39,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:36:39,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:36:39,184 INFO L87 Difference]: Start difference. First operand 17879 states and 62252 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:39,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:39,472 INFO L93 Difference]: Finished difference Result 18689 states and 64378 transitions. [2021-07-13 19:36:39,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:36:39,472 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:36:39,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:39,514 INFO L225 Difference]: With dead ends: 18689 [2021-07-13 19:36:39,514 INFO L226 Difference]: Without dead ends: 18683 [2021-07-13 19:36:39,515 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 184.8ms TimeCoverageRelationStatistics Valid=328, Invalid=664, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:36:39,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18683 states. [2021-07-13 19:36:39,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18683 to 17883. [2021-07-13 19:36:39,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17883 states, 17882 states have (on average 3.482104909965328) internal successors, (62267), 17882 states have internal predecessors, (62267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:39,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17883 states to 17883 states and 62267 transitions. [2021-07-13 19:36:39,958 INFO L78 Accepts]: Start accepts. Automaton has 17883 states and 62267 transitions. Word has length 22 [2021-07-13 19:36:39,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:39,958 INFO L482 AbstractCegarLoop]: Abstraction has 17883 states and 62267 transitions. [2021-07-13 19:36:39,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:39,958 INFO L276 IsEmpty]: Start isEmpty. Operand 17883 states and 62267 transitions. [2021-07-13 19:36:39,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:36:39,964 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:39,964 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:40,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21556,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:40,165 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:40,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:40,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1352230466, now seen corresponding path program 191 times [2021-07-13 19:36:40,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:40,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598385724] [2021-07-13 19:36:40,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:40,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:40,236 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:40,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:40,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598385724] [2021-07-13 19:36:40,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598385724] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:40,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630373193] [2021-07-13 19:36:40,237 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 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 [2021-07-13 19:36:40,270 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:36:40,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:40,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:36:40,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:40,317 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:40,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630373193] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:40,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:40,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-13 19:36:40,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944709481] [2021-07-13 19:36:40,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:36:40,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:40,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:36:40,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:36:40,317 INFO L87 Difference]: Start difference. First operand 17883 states and 62267 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:40,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:40,607 INFO L93 Difference]: Finished difference Result 19170 states and 65905 transitions. [2021-07-13 19:36:40,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:36:40,607 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:36:40,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:40,769 INFO L225 Difference]: With dead ends: 19170 [2021-07-13 19:36:40,769 INFO L226 Difference]: Without dead ends: 19170 [2021-07-13 19:36:40,769 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 215.1ms TimeCoverageRelationStatistics Valid=400, Invalid=790, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:36:40,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19170 states. [2021-07-13 19:36:41,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19170 to 17477. [2021-07-13 19:36:41,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17477 states, 17476 states have (on average 3.482776379034104) internal successors, (60865), 17476 states have internal predecessors, (60865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:41,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17477 states to 17477 states and 60865 transitions. [2021-07-13 19:36:41,078 INFO L78 Accepts]: Start accepts. Automaton has 17477 states and 60865 transitions. Word has length 22 [2021-07-13 19:36:41,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:41,078 INFO L482 AbstractCegarLoop]: Abstraction has 17477 states and 60865 transitions. [2021-07-13 19:36:41,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:41,078 INFO L276 IsEmpty]: Start isEmpty. Operand 17477 states and 60865 transitions. [2021-07-13 19:36:41,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:36:41,085 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:41,085 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:41,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21557 [2021-07-13 19:36:41,285 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:41,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:41,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1933767607, now seen corresponding path program 192 times [2021-07-13 19:36:41,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:41,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946858920] [2021-07-13 19:36:41,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:41,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:41,365 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:41,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:41,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946858920] [2021-07-13 19:36:41,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946858920] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:41,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019173041] [2021-07-13 19:36:41,365 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 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 [2021-07-13 19:36:41,392 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 19:36:41,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:41,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:36:41,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:41,434 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:41,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019173041] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:41,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:41,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-13 19:36:41,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699173223] [2021-07-13 19:36:41,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:36:41,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:41,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:36:41,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:36:41,435 INFO L87 Difference]: Start difference. First operand 17477 states and 60865 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:41,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:41,822 INFO L93 Difference]: Finished difference Result 18240 states and 62909 transitions. [2021-07-13 19:36:41,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:36:41,822 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:36:41,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:41,862 INFO L225 Difference]: With dead ends: 18240 [2021-07-13 19:36:41,863 INFO L226 Difference]: Without dead ends: 18233 [2021-07-13 19:36:41,863 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 297.3ms TimeCoverageRelationStatistics Valid=328, Invalid=664, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:36:41,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18233 states. [2021-07-13 19:36:42,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18233 to 17495. [2021-07-13 19:36:42,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17495 states, 17494 states have (on average 3.4824511261003774) internal successors, (60922), 17494 states have internal predecessors, (60922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:42,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17495 states to 17495 states and 60922 transitions. [2021-07-13 19:36:42,215 INFO L78 Accepts]: Start accepts. Automaton has 17495 states and 60922 transitions. Word has length 22 [2021-07-13 19:36:42,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:42,215 INFO L482 AbstractCegarLoop]: Abstraction has 17495 states and 60922 transitions. [2021-07-13 19:36:42,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:42,216 INFO L276 IsEmpty]: Start isEmpty. Operand 17495 states and 60922 transitions. [2021-07-13 19:36:42,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:36:42,223 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:42,223 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:42,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21558,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:42,423 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:42,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:42,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1675279652, now seen corresponding path program 193 times [2021-07-13 19:36:42,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:42,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299257226] [2021-07-13 19:36:42,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:42,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:42,607 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:42,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:42,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299257226] [2021-07-13 19:36:42,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299257226] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:42,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646997623] [2021-07-13 19:36:42,608 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 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 [2021-07-13 19:36:42,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:42,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:36:42,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:42,679 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:42,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646997623] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:42,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:42,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-13 19:36:42,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47934422] [2021-07-13 19:36:42,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:36:42,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:42,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:36:42,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:36:42,680 INFO L87 Difference]: Start difference. First operand 17495 states and 60922 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:43,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:43,069 INFO L93 Difference]: Finished difference Result 18422 states and 63184 transitions. [2021-07-13 19:36:43,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 19:36:43,069 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:36:43,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:43,112 INFO L225 Difference]: With dead ends: 18422 [2021-07-13 19:36:43,112 INFO L226 Difference]: Without dead ends: 18422 [2021-07-13 19:36:43,112 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 395.6ms TimeCoverageRelationStatistics Valid=643, Invalid=1249, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 19:36:43,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18422 states. [2021-07-13 19:36:43,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18422 to 17443. [2021-07-13 19:36:43,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17443 states, 17442 states have (on average 3.4833161334709324) internal successors, (60756), 17442 states have internal predecessors, (60756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:43,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17443 states to 17443 states and 60756 transitions. [2021-07-13 19:36:43,558 INFO L78 Accepts]: Start accepts. Automaton has 17443 states and 60756 transitions. Word has length 22 [2021-07-13 19:36:43,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:43,559 INFO L482 AbstractCegarLoop]: Abstraction has 17443 states and 60756 transitions. [2021-07-13 19:36:43,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:43,559 INFO L276 IsEmpty]: Start isEmpty. Operand 17443 states and 60756 transitions. [2021-07-13 19:36:43,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:36:43,565 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:43,565 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:43,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21559,195 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:43,765 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:43,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:43,765 INFO L82 PathProgramCache]: Analyzing trace with hash 4885383, now seen corresponding path program 194 times [2021-07-13 19:36:43,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:43,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143171104] [2021-07-13 19:36:43,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:43,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:43,828 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:43,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:43,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143171104] [2021-07-13 19:36:43,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143171104] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:43,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300797395] [2021-07-13 19:36:43,829 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 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 [2021-07-13 19:36:43,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:36:43,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:43,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:36:43,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:43,892 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 31 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:36:43,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300797395] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:43,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:43,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:36:43,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590664554] [2021-07-13 19:36:43,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:36:43,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:43,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:36:43,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:36:43,893 INFO L87 Difference]: Start difference. First operand 17443 states and 60756 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:44,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:44,047 INFO L93 Difference]: Finished difference Result 17724 states and 61191 transitions. [2021-07-13 19:36:44,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:36:44,047 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:36:44,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:44,096 INFO L225 Difference]: With dead ends: 17724 [2021-07-13 19:36:44,097 INFO L226 Difference]: Without dead ends: 17724 [2021-07-13 19:36:44,097 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 73.0ms TimeCoverageRelationStatistics Valid=132, Invalid=174, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:36:44,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17724 states. [2021-07-13 19:36:44,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17724 to 17454. [2021-07-13 19:36:44,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17454 states, 17453 states have (on average 3.4828396264252564) internal successors, (60786), 17453 states have internal predecessors, (60786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:44,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17454 states to 17454 states and 60786 transitions. [2021-07-13 19:36:44,584 INFO L78 Accepts]: Start accepts. Automaton has 17454 states and 60786 transitions. Word has length 22 [2021-07-13 19:36:44,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:44,584 INFO L482 AbstractCegarLoop]: Abstraction has 17454 states and 60786 transitions. [2021-07-13 19:36:44,585 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:44,585 INFO L276 IsEmpty]: Start isEmpty. Operand 17454 states and 60786 transitions. [2021-07-13 19:36:44,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:36:44,591 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:44,591 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:44,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21560,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:44,791 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:44,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:44,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1088175516, now seen corresponding path program 195 times [2021-07-13 19:36:44,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:44,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116548360] [2021-07-13 19:36:44,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:44,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:44,851 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:44,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:44,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116548360] [2021-07-13 19:36:44,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116548360] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:44,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607240954] [2021-07-13 19:36:44,851 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 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 [2021-07-13 19:36:44,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 19:36:44,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:44,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:36:44,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:44,912 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 27 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:36:44,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607240954] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:44,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:44,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:36:44,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438241144] [2021-07-13 19:36:44,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:36:44,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:44,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:36:44,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:36:44,913 INFO L87 Difference]: Start difference. First operand 17454 states and 60786 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:45,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:45,138 INFO L93 Difference]: Finished difference Result 17701 states and 61136 transitions. [2021-07-13 19:36:45,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:36:45,138 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:36:45,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:45,177 INFO L225 Difference]: With dead ends: 17701 [2021-07-13 19:36:45,178 INFO L226 Difference]: Without dead ends: 17697 [2021-07-13 19:36:45,178 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 126.3ms TimeCoverageRelationStatistics Valid=240, Invalid=410, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:36:45,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17697 states. [2021-07-13 19:36:45,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17697 to 16993. [2021-07-13 19:36:45,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16993 states, 16992 states have (on average 3.480637947269303) internal successors, (59143), 16992 states have internal predecessors, (59143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:45,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16993 states to 16993 states and 59143 transitions. [2021-07-13 19:36:45,656 INFO L78 Accepts]: Start accepts. Automaton has 16993 states and 59143 transitions. Word has length 22 [2021-07-13 19:36:45,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:45,656 INFO L482 AbstractCegarLoop]: Abstraction has 16993 states and 59143 transitions. [2021-07-13 19:36:45,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:45,656 INFO L276 IsEmpty]: Start isEmpty. Operand 16993 states and 59143 transitions. [2021-07-13 19:36:45,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:36:45,662 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:45,662 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:45,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21561 [2021-07-13 19:36:45,863 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:45,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:45,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1744977693, now seen corresponding path program 196 times [2021-07-13 19:36:45,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:45,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525609233] [2021-07-13 19:36:45,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:45,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:45,925 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 34 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:45,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:45,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525609233] [2021-07-13 19:36:45,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525609233] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:45,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760074293] [2021-07-13 19:36:45,926 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 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 [2021-07-13 19:36:45,949 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:36:45,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:45,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:36:45,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:45,983 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 36 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:45,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760074293] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:45,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:45,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:36:45,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349298803] [2021-07-13 19:36:45,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:36:45,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:45,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:36:45,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:36:45,984 INFO L87 Difference]: Start difference. First operand 16993 states and 59143 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:46,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:46,200 INFO L93 Difference]: Finished difference Result 17251 states and 59526 transitions. [2021-07-13 19:36:46,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:36:46,201 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:36:46,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:46,239 INFO L225 Difference]: With dead ends: 17251 [2021-07-13 19:36:46,240 INFO L226 Difference]: Without dead ends: 17250 [2021-07-13 19:36:46,240 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 119.7ms TimeCoverageRelationStatistics Valid=244, Invalid=406, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:36:46,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17250 states. [2021-07-13 19:36:46,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17250 to 16993. [2021-07-13 19:36:46,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16993 states, 16992 states have (on average 3.4791666666666665) internal successors, (59118), 16992 states have internal predecessors, (59118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:46,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16993 states to 16993 states and 59118 transitions. [2021-07-13 19:36:46,725 INFO L78 Accepts]: Start accepts. Automaton has 16993 states and 59118 transitions. Word has length 22 [2021-07-13 19:36:46,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:46,725 INFO L482 AbstractCegarLoop]: Abstraction has 16993 states and 59118 transitions. [2021-07-13 19:36:46,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:46,725 INFO L276 IsEmpty]: Start isEmpty. Operand 16993 states and 59118 transitions. [2021-07-13 19:36:46,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:36:46,731 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:46,731 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:46,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21562 [2021-07-13 19:36:46,931 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:46,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:46,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1627570870, now seen corresponding path program 197 times [2021-07-13 19:36:46,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:46,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076333162] [2021-07-13 19:36:46,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:46,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:47,026 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 19 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:47,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:47,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076333162] [2021-07-13 19:36:47,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076333162] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:47,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949931050] [2021-07-13 19:36:47,027 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 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 [2021-07-13 19:36:47,059 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:36:47,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:47,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:36:47,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:47,104 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 26 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:47,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949931050] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:47,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:47,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:36:47,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196205881] [2021-07-13 19:36:47,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:36:47,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:47,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:36:47,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:36:47,105 INFO L87 Difference]: Start difference. First operand 16993 states and 59118 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:47,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:47,284 INFO L93 Difference]: Finished difference Result 17351 states and 59762 transitions. [2021-07-13 19:36:47,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:36:47,284 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:36:47,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:47,344 INFO L225 Difference]: With dead ends: 17351 [2021-07-13 19:36:47,344 INFO L226 Difference]: Without dead ends: 17351 [2021-07-13 19:36:47,344 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 89.9ms TimeCoverageRelationStatistics Valid=128, Invalid=178, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:36:47,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17351 states. [2021-07-13 19:36:47,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17351 to 17008. [2021-07-13 19:36:47,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17008 states, 17007 states have (on average 3.477744458164285) internal successors, (59146), 17007 states have internal predecessors, (59146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:47,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17008 states to 17008 states and 59146 transitions. [2021-07-13 19:36:47,810 INFO L78 Accepts]: Start accepts. Automaton has 17008 states and 59146 transitions. Word has length 22 [2021-07-13 19:36:47,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:47,810 INFO L482 AbstractCegarLoop]: Abstraction has 17008 states and 59146 transitions. [2021-07-13 19:36:47,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:47,810 INFO L276 IsEmpty]: Start isEmpty. Operand 17008 states and 59146 transitions. [2021-07-13 19:36:47,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:36:47,816 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:47,816 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:48,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21563,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:48,017 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:48,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:48,017 INFO L82 PathProgramCache]: Analyzing trace with hash -839376295, now seen corresponding path program 198 times [2021-07-13 19:36:48,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:48,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440037039] [2021-07-13 19:36:48,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:48,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:48,081 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:48,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:48,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440037039] [2021-07-13 19:36:48,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440037039] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:48,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610377974] [2021-07-13 19:36:48,082 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 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 [2021-07-13 19:36:48,107 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-13 19:36:48,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:48,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:36:48,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:48,148 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 31 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:48,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610377974] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:48,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:48,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-13 19:36:48,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811543244] [2021-07-13 19:36:48,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:36:48,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:48,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:36:48,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:36:48,148 INFO L87 Difference]: Start difference. First operand 17008 states and 59146 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:48,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:48,382 INFO L93 Difference]: Finished difference Result 17271 states and 59536 transitions. [2021-07-13 19:36:48,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:36:48,382 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:36:48,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:48,423 INFO L225 Difference]: With dead ends: 17271 [2021-07-13 19:36:48,423 INFO L226 Difference]: Without dead ends: 17269 [2021-07-13 19:36:48,423 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 133.7ms TimeCoverageRelationStatistics Valid=273, Invalid=483, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:36:48,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17269 states. [2021-07-13 19:36:48,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17269 to 17008. [2021-07-13 19:36:48,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17008 states, 17007 states have (on average 3.4775092608925737) internal successors, (59142), 17007 states have internal predecessors, (59142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:48,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17008 states to 17008 states and 59142 transitions. [2021-07-13 19:36:48,912 INFO L78 Accepts]: Start accepts. Automaton has 17008 states and 59142 transitions. Word has length 22 [2021-07-13 19:36:48,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:48,912 INFO L482 AbstractCegarLoop]: Abstraction has 17008 states and 59142 transitions. [2021-07-13 19:36:48,912 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:48,912 INFO L276 IsEmpty]: Start isEmpty. Operand 17008 states and 59142 transitions. [2021-07-13 19:36:48,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:36:48,918 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:48,918 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:49,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21564 [2021-07-13 19:36:49,119 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:49,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:49,119 INFO L82 PathProgramCache]: Analyzing trace with hash 938349092, now seen corresponding path program 199 times [2021-07-13 19:36:49,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:49,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960630745] [2021-07-13 19:36:49,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:49,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:49,180 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:49,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:49,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960630745] [2021-07-13 19:36:49,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960630745] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:49,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109106876] [2021-07-13 19:36:49,180 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 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 [2021-07-13 19:36:49,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:49,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:36:49,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:49,249 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 23 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:49,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109106876] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:49,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:49,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-13 19:36:49,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380429262] [2021-07-13 19:36:49,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:36:49,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:49,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:36:49,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:36:49,250 INFO L87 Difference]: Start difference. First operand 17008 states and 59142 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:49,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:49,402 INFO L93 Difference]: Finished difference Result 17397 states and 59814 transitions. [2021-07-13 19:36:49,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:36:49,402 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:36:49,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:49,441 INFO L225 Difference]: With dead ends: 17397 [2021-07-13 19:36:49,442 INFO L226 Difference]: Without dead ends: 17397 [2021-07-13 19:36:49,442 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 83.1ms TimeCoverageRelationStatistics Valid=149, Invalid=231, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:36:49,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17397 states. [2021-07-13 19:36:49,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17397 to 16977. [2021-07-13 19:36:49,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16977 states, 16976 states have (on average 3.4736687087653157) internal successors, (58969), 16976 states have internal predecessors, (58969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:49,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16977 states to 16977 states and 58969 transitions. [2021-07-13 19:36:49,901 INFO L78 Accepts]: Start accepts. Automaton has 16977 states and 58969 transitions. Word has length 22 [2021-07-13 19:36:49,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:49,901 INFO L482 AbstractCegarLoop]: Abstraction has 16977 states and 58969 transitions. [2021-07-13 19:36:49,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:49,902 INFO L276 IsEmpty]: Start isEmpty. Operand 16977 states and 58969 transitions. [2021-07-13 19:36:49,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:36:49,908 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:49,908 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:50,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21565 [2021-07-13 19:36:50,108 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:50,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:50,109 INFO L82 PathProgramCache]: Analyzing trace with hash 650028701, now seen corresponding path program 200 times [2021-07-13 19:36:50,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:50,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922217956] [2021-07-13 19:36:50,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:50,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:50,176 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:36:50,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:50,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922217956] [2021-07-13 19:36:50,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922217956] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:50,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806530666] [2021-07-13 19:36:50,176 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 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 [2021-07-13 19:36:50,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:36:50,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:50,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:36:50,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:50,241 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:36:50,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806530666] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:50,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:50,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-13 19:36:50,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616657432] [2021-07-13 19:36:50,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:36:50,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:50,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:36:50,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:36:50,242 INFO L87 Difference]: Start difference. First operand 16977 states and 58969 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:50,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:50,464 INFO L93 Difference]: Finished difference Result 19691 states and 67365 transitions. [2021-07-13 19:36:50,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:36:50,465 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:36:50,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:50,513 INFO L225 Difference]: With dead ends: 19691 [2021-07-13 19:36:50,513 INFO L226 Difference]: Without dead ends: 19688 [2021-07-13 19:36:50,514 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 117.5ms TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:36:50,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19688 states. [2021-07-13 19:36:50,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19688 to 17043. [2021-07-13 19:36:50,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17043 states, 17042 states have (on average 3.4742987912216874) internal successors, (59209), 17042 states have internal predecessors, (59209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:51,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17043 states to 17043 states and 59209 transitions. [2021-07-13 19:36:51,028 INFO L78 Accepts]: Start accepts. Automaton has 17043 states and 59209 transitions. Word has length 22 [2021-07-13 19:36:51,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:51,028 INFO L482 AbstractCegarLoop]: Abstraction has 17043 states and 59209 transitions. [2021-07-13 19:36:51,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:51,028 INFO L276 IsEmpty]: Start isEmpty. Operand 17043 states and 59209 transitions. [2021-07-13 19:36:51,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:36:51,034 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:51,034 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:51,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21566 [2021-07-13 19:36:51,235 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:51,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:51,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1122510710, now seen corresponding path program 201 times [2021-07-13 19:36:51,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:51,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282183496] [2021-07-13 19:36:51,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:51,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:51,301 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:36:51,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:51,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282183496] [2021-07-13 19:36:51,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282183496] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:51,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094390346] [2021-07-13 19:36:51,301 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 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 [2021-07-13 19:36:51,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 19:36:51,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:51,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:36:51,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:51,374 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:36:51,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094390346] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:51,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:51,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-13 19:36:51,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924983366] [2021-07-13 19:36:51,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:36:51,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:51,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:36:51,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:36:51,375 INFO L87 Difference]: Start difference. First operand 17043 states and 59209 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:51,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:51,543 INFO L93 Difference]: Finished difference Result 26038 states and 89720 transitions. [2021-07-13 19:36:51,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:36:51,544 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:36:51,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:51,612 INFO L225 Difference]: With dead ends: 26038 [2021-07-13 19:36:51,612 INFO L226 Difference]: Without dead ends: 26038 [2021-07-13 19:36:51,612 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 79.3ms TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:36:51,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26038 states. [2021-07-13 19:36:52,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26038 to 25505. [2021-07-13 19:36:52,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25505 states, 25504 states have (on average 3.4754548306148054) internal successors, (88638), 25504 states have internal predecessors, (88638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:52,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25505 states to 25505 states and 88638 transitions. [2021-07-13 19:36:52,286 INFO L78 Accepts]: Start accepts. Automaton has 25505 states and 88638 transitions. Word has length 22 [2021-07-13 19:36:52,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:52,286 INFO L482 AbstractCegarLoop]: Abstraction has 25505 states and 88638 transitions. [2021-07-13 19:36:52,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:52,286 INFO L276 IsEmpty]: Start isEmpty. Operand 25505 states and 88638 transitions. [2021-07-13 19:36:52,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:36:52,293 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:52,293 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:52,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21567 [2021-07-13 19:36:52,494 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:52,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:52,494 INFO L82 PathProgramCache]: Analyzing trace with hash -423056679, now seen corresponding path program 202 times [2021-07-13 19:36:52,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:52,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677681676] [2021-07-13 19:36:52,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:52,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:52,567 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:52,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:52,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677681676] [2021-07-13 19:36:52,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677681676] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:52,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853336784] [2021-07-13 19:36:52,567 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 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 [2021-07-13 19:36:52,592 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:36:52,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:52,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:36:52,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:52,632 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 26 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:52,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853336784] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:52,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:52,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-13 19:36:52,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065265972] [2021-07-13 19:36:52,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:36:52,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:52,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:36:52,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:36:52,633 INFO L87 Difference]: Start difference. First operand 25505 states and 88638 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:52,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:52,906 INFO L93 Difference]: Finished difference Result 28515 states and 98094 transitions. [2021-07-13 19:36:52,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:36:52,906 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:36:52,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:52,999 INFO L225 Difference]: With dead ends: 28515 [2021-07-13 19:36:52,999 INFO L226 Difference]: Without dead ends: 28511 [2021-07-13 19:36:52,999 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 131.5ms TimeCoverageRelationStatistics Valid=222, Invalid=480, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:36:53,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28511 states. [2021-07-13 19:36:53,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28511 to 25686. [2021-07-13 19:36:53,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25686 states, 25685 states have (on average 3.4768152618259687) internal successors, (89302), 25685 states have internal predecessors, (89302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:53,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25686 states to 25686 states and 89302 transitions. [2021-07-13 19:36:53,746 INFO L78 Accepts]: Start accepts. Automaton has 25686 states and 89302 transitions. Word has length 22 [2021-07-13 19:36:53,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:53,746 INFO L482 AbstractCegarLoop]: Abstraction has 25686 states and 89302 transitions. [2021-07-13 19:36:53,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:53,746 INFO L276 IsEmpty]: Start isEmpty. Operand 25686 states and 89302 transitions. [2021-07-13 19:36:53,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:36:53,753 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:53,753 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:53,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21568 [2021-07-13 19:36:53,954 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:53,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:53,954 INFO L82 PathProgramCache]: Analyzing trace with hash -584655132, now seen corresponding path program 203 times [2021-07-13 19:36:53,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:53,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959080691] [2021-07-13 19:36:53,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:53,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:54,198 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:54,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:54,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959080691] [2021-07-13 19:36:54,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959080691] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:54,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648596686] [2021-07-13 19:36:54,198 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 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 [2021-07-13 19:36:54,224 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-13 19:36:54,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:54,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:36:54,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:54,271 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:54,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648596686] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:54,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:54,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-13 19:36:54,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321413755] [2021-07-13 19:36:54,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:36:54,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:54,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:36:54,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:36:54,272 INFO L87 Difference]: Start difference. First operand 25686 states and 89302 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:54,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:54,498 INFO L93 Difference]: Finished difference Result 26560 states and 91297 transitions. [2021-07-13 19:36:54,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:36:54,498 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:36:54,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:54,572 INFO L225 Difference]: With dead ends: 26560 [2021-07-13 19:36:54,572 INFO L226 Difference]: Without dead ends: 26560 [2021-07-13 19:36:54,572 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 287.8ms TimeCoverageRelationStatistics Valid=198, Invalid=354, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:36:54,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26560 states. [2021-07-13 19:36:55,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26560 to 25734. [2021-07-13 19:36:55,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25734 states, 25733 states have (on average 3.4752263630357905) internal successors, (89428), 25733 states have internal predecessors, (89428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:55,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25734 states to 25734 states and 89428 transitions. [2021-07-13 19:36:55,226 INFO L78 Accepts]: Start accepts. Automaton has 25734 states and 89428 transitions. Word has length 22 [2021-07-13 19:36:55,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:55,226 INFO L482 AbstractCegarLoop]: Abstraction has 25734 states and 89428 transitions. [2021-07-13 19:36:55,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:55,226 INFO L276 IsEmpty]: Start isEmpty. Operand 25734 states and 89428 transitions. [2021-07-13 19:36:55,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:36:55,233 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:55,233 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:55,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21569,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:55,433 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:55,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:55,434 INFO L82 PathProgramCache]: Analyzing trace with hash 671034909, now seen corresponding path program 204 times [2021-07-13 19:36:55,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:55,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202795159] [2021-07-13 19:36:55,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:55,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:55,507 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:55,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:55,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202795159] [2021-07-13 19:36:55,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202795159] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:55,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612081804] [2021-07-13 19:36:55,507 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 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 [2021-07-13 19:36:55,533 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 19:36:55,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:55,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:36:55,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:55,578 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:55,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612081804] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:55,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:55,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-13 19:36:55,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762400944] [2021-07-13 19:36:55,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:36:55,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:55,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:36:55,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:36:55,579 INFO L87 Difference]: Start difference. First operand 25734 states and 89428 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:55,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:55,839 INFO L93 Difference]: Finished difference Result 26225 states and 90728 transitions. [2021-07-13 19:36:55,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:36:55,840 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:36:55,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:55,912 INFO L225 Difference]: With dead ends: 26225 [2021-07-13 19:36:55,913 INFO L226 Difference]: Without dead ends: 26220 [2021-07-13 19:36:55,913 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 132.9ms TimeCoverageRelationStatistics Valid=216, Invalid=486, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:36:55,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26220 states. [2021-07-13 19:36:56,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26220 to 25734. [2021-07-13 19:36:56,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25734 states, 25733 states have (on average 3.475187502428788) internal successors, (89427), 25733 states have internal predecessors, (89427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:56,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25734 states to 25734 states and 89427 transitions. [2021-07-13 19:36:56,558 INFO L78 Accepts]: Start accepts. Automaton has 25734 states and 89427 transitions. Word has length 22 [2021-07-13 19:36:56,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:56,558 INFO L482 AbstractCegarLoop]: Abstraction has 25734 states and 89427 transitions. [2021-07-13 19:36:56,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:56,558 INFO L276 IsEmpty]: Start isEmpty. Operand 25734 states and 89427 transitions. [2021-07-13 19:36:56,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:36:56,565 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:56,565 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:56,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21570,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:56,765 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:56,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:56,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1091001398, now seen corresponding path program 205 times [2021-07-13 19:36:56,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:56,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723973978] [2021-07-13 19:36:56,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:56,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:56,985 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:56,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:56,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723973978] [2021-07-13 19:36:56,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723973978] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:56,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194346993] [2021-07-13 19:36:56,985 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 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 [2021-07-13 19:36:57,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:57,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:36:57,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:57,055 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:57,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194346993] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:57,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:57,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-13 19:36:57,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853520768] [2021-07-13 19:36:57,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:36:57,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:57,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:36:57,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:36:57,055 INFO L87 Difference]: Start difference. First operand 25734 states and 89427 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:57,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:57,291 INFO L93 Difference]: Finished difference Result 28702 states and 98967 transitions. [2021-07-13 19:36:57,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:36:57,291 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:36:57,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:57,362 INFO L225 Difference]: With dead ends: 28702 [2021-07-13 19:36:57,363 INFO L226 Difference]: Without dead ends: 28702 [2021-07-13 19:36:57,363 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 274.9ms TimeCoverageRelationStatistics Valid=202, Invalid=398, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:36:57,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28702 states. [2021-07-13 19:36:57,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28702 to 28343. [2021-07-13 19:36:57,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28343 states, 28342 states have (on average 3.469938607014325) internal successors, (98345), 28342 states have internal predecessors, (98345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:58,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28343 states to 28343 states and 98345 transitions. [2021-07-13 19:36:58,047 INFO L78 Accepts]: Start accepts. Automaton has 28343 states and 98345 transitions. Word has length 22 [2021-07-13 19:36:58,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:58,048 INFO L482 AbstractCegarLoop]: Abstraction has 28343 states and 98345 transitions. [2021-07-13 19:36:58,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:58,048 INFO L276 IsEmpty]: Start isEmpty. Operand 28343 states and 98345 transitions. [2021-07-13 19:36:58,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:36:58,055 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:58,055 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:58,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21571 [2021-07-13 19:36:58,256 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:58,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:58,256 INFO L82 PathProgramCache]: Analyzing trace with hash 228135769, now seen corresponding path program 206 times [2021-07-13 19:36:58,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:58,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177129395] [2021-07-13 19:36:58,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:58,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:58,332 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:58,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:58,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177129395] [2021-07-13 19:36:58,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177129395] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:58,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652763450] [2021-07-13 19:36:58,332 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 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 [2021-07-13 19:36:58,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:36:58,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:58,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:36:58,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:58,399 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 30 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:58,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652763450] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:58,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:58,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-13 19:36:58,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088894238] [2021-07-13 19:36:58,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:36:58,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:58,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:36:58,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:36:58,400 INFO L87 Difference]: Start difference. First operand 28343 states and 98345 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:58,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:58,778 INFO L93 Difference]: Finished difference Result 28805 states and 99574 transitions. [2021-07-13 19:36:58,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:36:58,778 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:36:58,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:58,856 INFO L225 Difference]: With dead ends: 28805 [2021-07-13 19:36:58,856 INFO L226 Difference]: Without dead ends: 28799 [2021-07-13 19:36:58,856 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 137.8ms TimeCoverageRelationStatistics Valid=212, Invalid=490, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:36:58,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28799 states. [2021-07-13 19:36:59,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28799 to 28343. [2021-07-13 19:36:59,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28343 states, 28342 states have (on average 3.4699033236892243) internal successors, (98344), 28342 states have internal predecessors, (98344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:59,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28343 states to 28343 states and 98344 transitions. [2021-07-13 19:36:59,556 INFO L78 Accepts]: Start accepts. Automaton has 28343 states and 98344 transitions. Word has length 22 [2021-07-13 19:36:59,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:59,556 INFO L482 AbstractCegarLoop]: Abstraction has 28343 states and 98344 transitions. [2021-07-13 19:36:59,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:36:59,556 INFO L276 IsEmpty]: Start isEmpty. Operand 28343 states and 98344 transitions. [2021-07-13 19:36:59,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:36:59,564 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:59,564 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:59,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21572 [2021-07-13 19:36:59,764 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:59,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:59,765 INFO L82 PathProgramCache]: Analyzing trace with hash 392133540, now seen corresponding path program 207 times [2021-07-13 19:36:59,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:59,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043103185] [2021-07-13 19:36:59,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:59,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:59,839 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:59,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:59,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043103185] [2021-07-13 19:36:59,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043103185] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:59,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183722473] [2021-07-13 19:36:59,839 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 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 [2021-07-13 19:36:59,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 19:36:59,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:59,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:36:59,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:59,911 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:59,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183722473] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:59,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:59,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-13 19:36:59,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255688894] [2021-07-13 19:36:59,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:36:59,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:59,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:36:59,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:36:59,912 INFO L87 Difference]: Start difference. First operand 28343 states and 98344 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:00,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:00,212 INFO L93 Difference]: Finished difference Result 29601 states and 101949 transitions. [2021-07-13 19:37:00,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:37:00,212 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:37:00,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:00,494 INFO L225 Difference]: With dead ends: 29601 [2021-07-13 19:37:00,494 INFO L226 Difference]: Without dead ends: 29601 [2021-07-13 19:37:00,494 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 174.4ms TimeCoverageRelationStatistics Valid=280, Invalid=590, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:37:00,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29601 states. [2021-07-13 19:37:01,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29601 to 29306. [2021-07-13 19:37:01,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29306 states, 29305 states have (on average 3.463504521412728) internal successors, (101498), 29305 states have internal predecessors, (101498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:01,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29306 states to 29306 states and 101498 transitions. [2021-07-13 19:37:01,187 INFO L78 Accepts]: Start accepts. Automaton has 29306 states and 101498 transitions. Word has length 22 [2021-07-13 19:37:01,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:01,187 INFO L482 AbstractCegarLoop]: Abstraction has 29306 states and 101498 transitions. [2021-07-13 19:37:01,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:01,187 INFO L276 IsEmpty]: Start isEmpty. Operand 29306 states and 101498 transitions. [2021-07-13 19:37:01,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:37:01,195 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:01,195 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:01,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21573 [2021-07-13 19:37:01,397 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:01,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:01,397 INFO L82 PathProgramCache]: Analyzing trace with hash -616835683, now seen corresponding path program 208 times [2021-07-13 19:37:01,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:01,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578621353] [2021-07-13 19:37:01,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:01,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:01,476 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:01,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:01,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578621353] [2021-07-13 19:37:01,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578621353] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:01,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204967355] [2021-07-13 19:37:01,477 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 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 [2021-07-13 19:37:01,502 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:37:01,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:01,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:37:01,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:01,543 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:01,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204967355] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:01,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:01,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-13 19:37:01,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970840121] [2021-07-13 19:37:01,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:37:01,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:01,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:37:01,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:37:01,544 INFO L87 Difference]: Start difference. First operand 29306 states and 101498 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:01,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:01,808 INFO L93 Difference]: Finished difference Result 29739 states and 102655 transitions. [2021-07-13 19:37:01,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:37:01,809 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:37:01,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:01,889 INFO L225 Difference]: With dead ends: 29739 [2021-07-13 19:37:01,889 INFO L226 Difference]: Without dead ends: 29732 [2021-07-13 19:37:01,889 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 144.6ms TimeCoverageRelationStatistics Valid=210, Invalid=492, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:37:01,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29732 states. [2021-07-13 19:37:02,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29732 to 29306. [2021-07-13 19:37:02,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29306 states, 29305 states have (on average 3.463470397543081) internal successors, (101497), 29305 states have internal predecessors, (101497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:02,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29306 states to 29306 states and 101497 transitions. [2021-07-13 19:37:02,812 INFO L78 Accepts]: Start accepts. Automaton has 29306 states and 101497 transitions. Word has length 22 [2021-07-13 19:37:02,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:02,812 INFO L482 AbstractCegarLoop]: Abstraction has 29306 states and 101497 transitions. [2021-07-13 19:37:02,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:02,812 INFO L276 IsEmpty]: Start isEmpty. Operand 29306 states and 101497 transitions. [2021-07-13 19:37:02,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:37:02,821 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:02,821 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:03,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21574 [2021-07-13 19:37:03,021 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:03,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:03,021 INFO L82 PathProgramCache]: Analyzing trace with hash -875323638, now seen corresponding path program 209 times [2021-07-13 19:37:03,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:03,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319746516] [2021-07-13 19:37:03,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:03,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:03,098 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:03,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:03,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319746516] [2021-07-13 19:37:03,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319746516] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:03,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567820009] [2021-07-13 19:37:03,098 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 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 [2021-07-13 19:37:03,125 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:37:03,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:03,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:37:03,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:03,176 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:03,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567820009] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:03,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:03,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-13 19:37:03,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012685732] [2021-07-13 19:37:03,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:37:03,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:03,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:37:03,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:37:03,177 INFO L87 Difference]: Start difference. First operand 29306 states and 101497 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:03,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:03,662 INFO L93 Difference]: Finished difference Result 29939 states and 102947 transitions. [2021-07-13 19:37:03,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:37:03,663 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:37:03,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:03,741 INFO L225 Difference]: With dead ends: 29939 [2021-07-13 19:37:03,741 INFO L226 Difference]: Without dead ends: 29939 [2021-07-13 19:37:03,741 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 325.3ms TimeCoverageRelationStatistics Valid=519, Invalid=1041, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:37:03,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29939 states. [2021-07-13 19:37:04,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29939 to 29574. [2021-07-13 19:37:04,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29574 states, 29573 states have (on average 3.4610286409900923) internal successors, (102353), 29573 states have internal predecessors, (102353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:04,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29574 states to 29574 states and 102353 transitions. [2021-07-13 19:37:04,441 INFO L78 Accepts]: Start accepts. Automaton has 29574 states and 102353 transitions. Word has length 22 [2021-07-13 19:37:04,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:04,441 INFO L482 AbstractCegarLoop]: Abstraction has 29574 states and 102353 transitions. [2021-07-13 19:37:04,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:04,441 INFO L276 IsEmpty]: Start isEmpty. Operand 29574 states and 102353 transitions. [2021-07-13 19:37:04,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:37:04,450 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:04,450 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:04,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21575,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:04,650 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:04,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:04,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1041146919, now seen corresponding path program 210 times [2021-07-13 19:37:04,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:04,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325218803] [2021-07-13 19:37:04,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:04,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:04,854 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:04,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:04,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325218803] [2021-07-13 19:37:04,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325218803] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:04,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255340864] [2021-07-13 19:37:04,855 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 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 [2021-07-13 19:37:04,881 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 19:37:04,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:04,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:37:04,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:04,923 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 42 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:04,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255340864] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:04,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:04,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-13 19:37:04,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666332991] [2021-07-13 19:37:04,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:37:04,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:04,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:37:04,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:37:04,924 INFO L87 Difference]: Start difference. First operand 29574 states and 102353 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:05,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:05,190 INFO L93 Difference]: Finished difference Result 29973 states and 103433 transitions. [2021-07-13 19:37:05,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:37:05,191 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:37:05,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:05,262 INFO L225 Difference]: With dead ends: 29973 [2021-07-13 19:37:05,262 INFO L226 Difference]: Without dead ends: 29965 [2021-07-13 19:37:05,262 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 273.0ms TimeCoverageRelationStatistics Valid=210, Invalid=492, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:37:05,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29965 states. [2021-07-13 19:37:05,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29965 to 29574. [2021-07-13 19:37:05,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29574 states, 29573 states have (on average 3.460994826361884) internal successors, (102352), 29573 states have internal predecessors, (102352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:05,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29574 states to 29574 states and 102352 transitions. [2021-07-13 19:37:05,966 INFO L78 Accepts]: Start accepts. Automaton has 29574 states and 102352 transitions. Word has length 22 [2021-07-13 19:37:05,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:05,966 INFO L482 AbstractCegarLoop]: Abstraction has 29574 states and 102352 transitions. [2021-07-13 19:37:05,966 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:05,966 INFO L276 IsEmpty]: Start isEmpty. Operand 29574 states and 102352 transitions. [2021-07-13 19:37:05,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:37:05,974 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:05,974 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:06,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21576 [2021-07-13 19:37:06,175 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:06,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:06,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1511790492, now seen corresponding path program 211 times [2021-07-13 19:37:06,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:06,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652090771] [2021-07-13 19:37:06,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:06,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:06,257 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:06,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:06,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652090771] [2021-07-13 19:37:06,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652090771] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:06,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115254658] [2021-07-13 19:37:06,258 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 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 [2021-07-13 19:37:06,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:06,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:37:06,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:06,329 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:06,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115254658] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:06,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:06,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-13 19:37:06,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159731255] [2021-07-13 19:37:06,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:37:06,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:06,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:37:06,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:37:06,330 INFO L87 Difference]: Start difference. First operand 29574 states and 102352 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:06,559 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-07-13 19:37:06,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:06,943 INFO L93 Difference]: Finished difference Result 30267 states and 103892 transitions. [2021-07-13 19:37:06,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 19:37:06,943 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:37:06,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:07,024 INFO L225 Difference]: With dead ends: 30267 [2021-07-13 19:37:07,025 INFO L226 Difference]: Without dead ends: 30267 [2021-07-13 19:37:07,025 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 463.6ms TimeCoverageRelationStatistics Valid=754, Invalid=1502, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 19:37:07,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30267 states. [2021-07-13 19:37:07,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30267 to 29743. [2021-07-13 19:37:07,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29743 states, 29742 states have (on average 3.458879698742519) internal successors, (102874), 29742 states have internal predecessors, (102874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:07,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29743 states to 29743 states and 102874 transitions. [2021-07-13 19:37:07,742 INFO L78 Accepts]: Start accepts. Automaton has 29743 states and 102874 transitions. Word has length 22 [2021-07-13 19:37:07,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:07,742 INFO L482 AbstractCegarLoop]: Abstraction has 29743 states and 102874 transitions. [2021-07-13 19:37:07,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:07,742 INFO L276 IsEmpty]: Start isEmpty. Operand 29743 states and 102874 transitions. [2021-07-13 19:37:07,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:37:07,751 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:07,751 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:07,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21577,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:07,952 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:07,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:07,952 INFO L82 PathProgramCache]: Analyzing trace with hash -2137915585, now seen corresponding path program 212 times [2021-07-13 19:37:07,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:07,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351106449] [2021-07-13 19:37:07,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:07,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:08,009 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:37:08,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:08,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351106449] [2021-07-13 19:37:08,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351106449] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:08,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117533621] [2021-07-13 19:37:08,010 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 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 [2021-07-13 19:37:08,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:37:08,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:08,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:37:08,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:08,086 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 46 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:37:08,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117533621] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:08,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:08,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-13 19:37:08,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172237259] [2021-07-13 19:37:08,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:37:08,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:08,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:37:08,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:37:08,087 INFO L87 Difference]: Start difference. First operand 29743 states and 102874 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:08,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:08,476 INFO L93 Difference]: Finished difference Result 30158 states and 103835 transitions. [2021-07-13 19:37:08,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:37:08,477 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:37:08,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:08,546 INFO L225 Difference]: With dead ends: 30158 [2021-07-13 19:37:08,546 INFO L226 Difference]: Without dead ends: 30158 [2021-07-13 19:37:08,546 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 93.3ms TimeCoverageRelationStatistics Valid=157, Invalid=263, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:37:08,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30158 states. [2021-07-13 19:37:09,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30158 to 29791. [2021-07-13 19:37:09,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29791 states, 29790 states have (on average 3.4585431352802956) internal successors, (103030), 29790 states have internal predecessors, (103030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:09,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29791 states to 29791 states and 103030 transitions. [2021-07-13 19:37:09,267 INFO L78 Accepts]: Start accepts. Automaton has 29791 states and 103030 transitions. Word has length 22 [2021-07-13 19:37:09,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:09,267 INFO L482 AbstractCegarLoop]: Abstraction has 29791 states and 103030 transitions. [2021-07-13 19:37:09,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:09,267 INFO L276 IsEmpty]: Start isEmpty. Operand 29791 states and 103030 transitions. [2021-07-13 19:37:09,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:37:09,276 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:09,276 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:09,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21578 [2021-07-13 19:37:09,476 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:09,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:09,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1379307466, now seen corresponding path program 213 times [2021-07-13 19:37:09,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:09,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202688008] [2021-07-13 19:37:09,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:09,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:09,532 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:37:09,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:09,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202688008] [2021-07-13 19:37:09,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202688008] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:09,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369620801] [2021-07-13 19:37:09,532 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 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 [2021-07-13 19:37:09,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 19:37:09,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:09,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:37:09,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:09,594 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:37:09,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369620801] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:09,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:09,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-13 19:37:09,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778237582] [2021-07-13 19:37:09,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:37:09,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:09,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:37:09,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:37:09,595 INFO L87 Difference]: Start difference. First operand 29791 states and 103030 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:10,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:10,114 INFO L93 Difference]: Finished difference Result 31233 states and 107516 transitions. [2021-07-13 19:37:10,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:37:10,115 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:37:10,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:10,200 INFO L225 Difference]: With dead ends: 31233 [2021-07-13 19:37:10,200 INFO L226 Difference]: Without dead ends: 31229 [2021-07-13 19:37:10,201 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 155.2ms TimeCoverageRelationStatistics Valid=260, Invalid=496, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:37:10,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31229 states. [2021-07-13 19:37:10,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31229 to 28496. [2021-07-13 19:37:10,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28496 states, 28495 states have (on average 3.449131426566064) internal successors, (98283), 28495 states have internal predecessors, (98283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:10,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28496 states to 28496 states and 98283 transitions. [2021-07-13 19:37:10,901 INFO L78 Accepts]: Start accepts. Automaton has 28496 states and 98283 transitions. Word has length 22 [2021-07-13 19:37:10,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:10,901 INFO L482 AbstractCegarLoop]: Abstraction has 28496 states and 98283 transitions. [2021-07-13 19:37:10,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:10,901 INFO L276 IsEmpty]: Start isEmpty. Operand 28496 states and 98283 transitions. [2021-07-13 19:37:10,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:37:10,910 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:10,910 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:11,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21579,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:11,111 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:11,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:11,111 INFO L82 PathProgramCache]: Analyzing trace with hash 2127159261, now seen corresponding path program 214 times [2021-07-13 19:37:11,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:11,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608913671] [2021-07-13 19:37:11,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:11,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:11,177 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:11,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:11,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608913671] [2021-07-13 19:37:11,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608913671] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:11,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310054158] [2021-07-13 19:37:11,177 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 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 [2021-07-13 19:37:11,204 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:37:11,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:11,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:37:11,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:11,239 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:37:11,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310054158] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:11,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:11,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:37:11,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513286114] [2021-07-13 19:37:11,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:37:11,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:11,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:37:11,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:37:11,240 INFO L87 Difference]: Start difference. First operand 28496 states and 98283 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:11,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:11,507 INFO L93 Difference]: Finished difference Result 28956 states and 99501 transitions. [2021-07-13 19:37:11,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:37:11,508 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:37:11,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:11,582 INFO L225 Difference]: With dead ends: 28956 [2021-07-13 19:37:11,582 INFO L226 Difference]: Without dead ends: 28951 [2021-07-13 19:37:11,583 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 129.4ms TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:37:11,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28951 states. [2021-07-13 19:37:12,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28951 to 28496. [2021-07-13 19:37:12,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28496 states, 28495 states have (on average 3.449061238813827) internal successors, (98281), 28495 states have internal predecessors, (98281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:12,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28496 states to 28496 states and 98281 transitions. [2021-07-13 19:37:12,499 INFO L78 Accepts]: Start accepts. Automaton has 28496 states and 98281 transitions. Word has length 22 [2021-07-13 19:37:12,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:12,499 INFO L482 AbstractCegarLoop]: Abstraction has 28496 states and 98281 transitions. [2021-07-13 19:37:12,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:12,500 INFO L276 IsEmpty]: Start isEmpty. Operand 28496 states and 98281 transitions. [2021-07-13 19:37:12,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:37:12,509 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:12,509 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:12,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21580 [2021-07-13 19:37:12,710 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:12,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:12,710 INFO L82 PathProgramCache]: Analyzing trace with hash 365122954, now seen corresponding path program 215 times [2021-07-13 19:37:12,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:12,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279059468] [2021-07-13 19:37:12,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:12,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:12,772 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:12,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:12,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279059468] [2021-07-13 19:37:12,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279059468] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:12,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615248661] [2021-07-13 19:37:12,773 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 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 [2021-07-13 19:37:12,799 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:37:12,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:12,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:37:12,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:12,838 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:37:12,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615248661] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:12,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:12,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:37:12,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839755056] [2021-07-13 19:37:12,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:37:12,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:12,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:37:12,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:37:12,839 INFO L87 Difference]: Start difference. First operand 28496 states and 98281 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:13,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:13,167 INFO L93 Difference]: Finished difference Result 34766 states and 118378 transitions. [2021-07-13 19:37:13,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:37:13,168 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:37:13,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:13,263 INFO L225 Difference]: With dead ends: 34766 [2021-07-13 19:37:13,264 INFO L226 Difference]: Without dead ends: 34766 [2021-07-13 19:37:13,264 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 171.8ms TimeCoverageRelationStatistics Valid=301, Invalid=569, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:37:13,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34766 states. [2021-07-13 19:37:14,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34766 to 33433. [2021-07-13 19:37:14,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33433 states, 33432 states have (on average 3.4411043311797083) internal successors, (115043), 33432 states have internal predecessors, (115043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:14,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33433 states to 33433 states and 115043 transitions. [2021-07-13 19:37:14,230 INFO L78 Accepts]: Start accepts. Automaton has 33433 states and 115043 transitions. Word has length 22 [2021-07-13 19:37:14,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:14,230 INFO L482 AbstractCegarLoop]: Abstraction has 33433 states and 115043 transitions. [2021-07-13 19:37:14,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:14,230 INFO L276 IsEmpty]: Start isEmpty. Operand 33433 states and 115043 transitions. [2021-07-13 19:37:14,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:37:14,240 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:14,240 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:14,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21581 [2021-07-13 19:37:14,440 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:14,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:14,441 INFO L82 PathProgramCache]: Analyzing trace with hash 859702083, now seen corresponding path program 216 times [2021-07-13 19:37:14,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:14,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785132386] [2021-07-13 19:37:14,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:14,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:14,511 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:14,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:14,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785132386] [2021-07-13 19:37:14,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785132386] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:14,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370865442] [2021-07-13 19:37:14,511 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 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 [2021-07-13 19:37:14,539 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 19:37:14,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:14,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:37:14,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:14,573 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:14,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370865442] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:14,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:14,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-13 19:37:14,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793009673] [2021-07-13 19:37:14,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:37:14,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:14,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:37:14,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:37:14,574 INFO L87 Difference]: Start difference. First operand 33433 states and 115043 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:14,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:14,874 INFO L93 Difference]: Finished difference Result 33998 states and 116476 transitions. [2021-07-13 19:37:14,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:37:14,874 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:37:14,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:14,958 INFO L225 Difference]: With dead ends: 33998 [2021-07-13 19:37:14,958 INFO L226 Difference]: Without dead ends: 33993 [2021-07-13 19:37:14,959 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 140.9ms TimeCoverageRelationStatistics Valid=253, Invalid=503, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:37:14,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33993 states. [2021-07-13 19:37:15,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33993 to 33433. [2021-07-13 19:37:15,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33433 states, 33432 states have (on average 3.440984685331419) internal successors, (115039), 33432 states have internal predecessors, (115039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:15,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33433 states to 33433 states and 115039 transitions. [2021-07-13 19:37:15,910 INFO L78 Accepts]: Start accepts. Automaton has 33433 states and 115039 transitions. Word has length 22 [2021-07-13 19:37:15,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:15,910 INFO L482 AbstractCegarLoop]: Abstraction has 33433 states and 115039 transitions. [2021-07-13 19:37:15,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:15,910 INFO L276 IsEmpty]: Start isEmpty. Operand 33433 states and 115039 transitions. [2021-07-13 19:37:15,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:37:15,920 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:15,920 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:16,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21582,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:16,120 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:16,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:16,121 INFO L82 PathProgramCache]: Analyzing trace with hash -902334224, now seen corresponding path program 217 times [2021-07-13 19:37:16,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:16,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162986531] [2021-07-13 19:37:16,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:16,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:16,186 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:16,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:16,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162986531] [2021-07-13 19:37:16,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162986531] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:16,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681948046] [2021-07-13 19:37:16,187 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 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 [2021-07-13 19:37:16,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:16,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:37:16,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:16,249 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:16,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681948046] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:16,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:16,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-13 19:37:16,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304929551] [2021-07-13 19:37:16,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:37:16,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:16,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:37:16,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:37:16,250 INFO L87 Difference]: Start difference. First operand 33433 states and 115039 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:16,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:16,607 INFO L93 Difference]: Finished difference Result 40272 states and 136673 transitions. [2021-07-13 19:37:16,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:37:16,608 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:37:16,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:16,909 INFO L225 Difference]: With dead ends: 40272 [2021-07-13 19:37:16,909 INFO L226 Difference]: Without dead ends: 40272 [2021-07-13 19:37:16,910 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 167.7ms TimeCoverageRelationStatistics Valid=325, Invalid=605, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:37:16,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40272 states. [2021-07-13 19:37:17,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40272 to 29596. [2021-07-13 19:37:17,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29596 states, 29595 states have (on average 3.431120121642169) internal successors, (101544), 29595 states have internal predecessors, (101544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:17,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29596 states to 29596 states and 101544 transitions. [2021-07-13 19:37:17,695 INFO L78 Accepts]: Start accepts. Automaton has 29596 states and 101544 transitions. Word has length 22 [2021-07-13 19:37:17,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:17,695 INFO L482 AbstractCegarLoop]: Abstraction has 29596 states and 101544 transitions. [2021-07-13 19:37:17,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:17,696 INFO L276 IsEmpty]: Start isEmpty. Operand 29596 states and 101544 transitions. [2021-07-13 19:37:17,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:37:17,705 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:17,705 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:17,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21583 [2021-07-13 19:37:17,905 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:17,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:17,906 INFO L82 PathProgramCache]: Analyzing trace with hash 416802943, now seen corresponding path program 218 times [2021-07-13 19:37:17,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:17,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710662485] [2021-07-13 19:37:17,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:17,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:17,979 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:17,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:17,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710662485] [2021-07-13 19:37:17,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710662485] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:17,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720646722] [2021-07-13 19:37:17,980 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 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 [2021-07-13 19:37:18,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:37:18,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:18,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:37:18,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:18,041 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 30 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:18,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720646722] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:18,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:18,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-13 19:37:18,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524668110] [2021-07-13 19:37:18,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:37:18,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:18,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:37:18,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:37:18,042 INFO L87 Difference]: Start difference. First operand 29596 states and 101544 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:18,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:18,381 INFO L93 Difference]: Finished difference Result 30323 states and 103506 transitions. [2021-07-13 19:37:18,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:37:18,381 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:37:18,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:18,467 INFO L225 Difference]: With dead ends: 30323 [2021-07-13 19:37:18,467 INFO L226 Difference]: Without dead ends: 30317 [2021-07-13 19:37:18,467 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 177.9ms TimeCoverageRelationStatistics Valid=307, Invalid=623, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:37:18,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30317 states. [2021-07-13 19:37:19,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30317 to 29652. [2021-07-13 19:37:19,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29652 states, 29651 states have (on average 3.4303058918754847) internal successors, (101712), 29651 states have internal predecessors, (101712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:19,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29652 states to 29652 states and 101712 transitions. [2021-07-13 19:37:19,365 INFO L78 Accepts]: Start accepts. Automaton has 29652 states and 101712 transitions. Word has length 22 [2021-07-13 19:37:19,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:19,365 INFO L482 AbstractCegarLoop]: Abstraction has 29652 states and 101712 transitions. [2021-07-13 19:37:19,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:19,365 INFO L276 IsEmpty]: Start isEmpty. Operand 29652 states and 101712 transitions. [2021-07-13 19:37:19,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:37:19,375 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:19,375 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:19,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21584 [2021-07-13 19:37:19,575 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:19,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:19,575 INFO L82 PathProgramCache]: Analyzing trace with hash 580800714, now seen corresponding path program 219 times [2021-07-13 19:37:19,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:19,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298102487] [2021-07-13 19:37:19,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:19,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:19,647 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:19,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:19,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298102487] [2021-07-13 19:37:19,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298102487] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:19,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373495941] [2021-07-13 19:37:19,647 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 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 [2021-07-13 19:37:19,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:37:19,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:19,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:37:19,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:19,712 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:19,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373495941] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:19,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:19,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-13 19:37:19,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391272591] [2021-07-13 19:37:19,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:37:19,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:19,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:37:19,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:37:19,713 INFO L87 Difference]: Start difference. First operand 29652 states and 101712 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:20,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:20,117 INFO L93 Difference]: Finished difference Result 34838 states and 118433 transitions. [2021-07-13 19:37:20,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:37:20,118 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:37:20,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:20,200 INFO L225 Difference]: With dead ends: 34838 [2021-07-13 19:37:20,200 INFO L226 Difference]: Without dead ends: 34838 [2021-07-13 19:37:20,200 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 238.7ms TimeCoverageRelationStatistics Valid=453, Invalid=879, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:37:20,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34838 states. [2021-07-13 19:37:20,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34838 to 33690. [2021-07-13 19:37:21,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33690 states, 33689 states have (on average 3.4329603134554305) internal successors, (115653), 33689 states have internal predecessors, (115653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:21,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33690 states to 33690 states and 115653 transitions. [2021-07-13 19:37:21,137 INFO L78 Accepts]: Start accepts. Automaton has 33690 states and 115653 transitions. Word has length 22 [2021-07-13 19:37:21,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:21,137 INFO L482 AbstractCegarLoop]: Abstraction has 33690 states and 115653 transitions. [2021-07-13 19:37:21,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:21,138 INFO L276 IsEmpty]: Start isEmpty. Operand 33690 states and 115653 transitions. [2021-07-13 19:37:21,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:37:21,147 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:21,147 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:21,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21585,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:21,348 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:21,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:21,348 INFO L82 PathProgramCache]: Analyzing trace with hash 223235229, now seen corresponding path program 220 times [2021-07-13 19:37:21,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:21,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116332214] [2021-07-13 19:37:21,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:21,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:21,419 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 23 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:21,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:21,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116332214] [2021-07-13 19:37:21,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116332214] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:21,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486984401] [2021-07-13 19:37:21,419 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 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 [2021-07-13 19:37:21,443 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:37:21,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:21,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:37:21,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:21,485 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:21,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486984401] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:21,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:21,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-13 19:37:21,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465174610] [2021-07-13 19:37:21,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:37:21,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:21,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:37:21,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:37:21,486 INFO L87 Difference]: Start difference. First operand 33690 states and 115653 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:21,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:21,826 INFO L93 Difference]: Finished difference Result 34116 states and 116578 transitions. [2021-07-13 19:37:21,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:37:21,826 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:37:21,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:22,123 INFO L225 Difference]: With dead ends: 34116 [2021-07-13 19:37:22,124 INFO L226 Difference]: Without dead ends: 34111 [2021-07-13 19:37:22,124 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 155.9ms TimeCoverageRelationStatistics Valid=292, Invalid=578, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:37:22,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34111 states. [2021-07-13 19:37:22,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34111 to 33690. [2021-07-13 19:37:22,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33690 states, 33689 states have (on average 3.4328712636172045) internal successors, (115650), 33689 states have internal predecessors, (115650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:22,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33690 states to 33690 states and 115650 transitions. [2021-07-13 19:37:22,906 INFO L78 Accepts]: Start accepts. Automaton has 33690 states and 115650 transitions. Word has length 22 [2021-07-13 19:37:22,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:22,906 INFO L482 AbstractCegarLoop]: Abstraction has 33690 states and 115650 transitions. [2021-07-13 19:37:22,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:22,906 INFO L276 IsEmpty]: Start isEmpty. Operand 33690 states and 115650 transitions. [2021-07-13 19:37:22,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:37:22,916 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:22,916 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:23,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21586 [2021-07-13 19:37:23,116 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:23,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:23,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1538801078, now seen corresponding path program 221 times [2021-07-13 19:37:23,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:23,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112802589] [2021-07-13 19:37:23,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:23,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:23,184 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:23,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:23,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112802589] [2021-07-13 19:37:23,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112802589] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:23,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622724110] [2021-07-13 19:37:23,184 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 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:23,210 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:37:23,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:23,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:37:23,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:23,258 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:23,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622724110] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:23,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:23,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-13 19:37:23,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316557003] [2021-07-13 19:37:23,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:37:23,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:23,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:37:23,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:37:23,258 INFO L87 Difference]: Start difference. First operand 33690 states and 115650 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:23,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:23,587 INFO L93 Difference]: Finished difference Result 36368 states and 123286 transitions. [2021-07-13 19:37:23,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:37:23,588 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:37:23,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:23,914 INFO L225 Difference]: With dead ends: 36368 [2021-07-13 19:37:23,914 INFO L226 Difference]: Without dead ends: 36368 [2021-07-13 19:37:23,914 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 170.0ms TimeCoverageRelationStatistics Valid=330, Invalid=600, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:37:23,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36368 states. [2021-07-13 19:37:24,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36368 to 27032. [2021-07-13 19:37:24,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27032 states, 27031 states have (on average 3.4189634123783805) internal successors, (92418), 27031 states have internal predecessors, (92418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:24,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27032 states to 27032 states and 92418 transitions. [2021-07-13 19:37:24,626 INFO L78 Accepts]: Start accepts. Automaton has 27032 states and 92418 transitions. Word has length 22 [2021-07-13 19:37:24,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:24,626 INFO L482 AbstractCegarLoop]: Abstraction has 27032 states and 92418 transitions. [2021-07-13 19:37:24,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:24,626 INFO L276 IsEmpty]: Start isEmpty. Operand 27032 states and 92418 transitions. [2021-07-13 19:37:24,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:37:24,635 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:24,635 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:24,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21587 [2021-07-13 19:37:24,836 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:24,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:24,836 INFO L82 PathProgramCache]: Analyzing trace with hash -219663911, now seen corresponding path program 222 times [2021-07-13 19:37:24,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:24,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455136689] [2021-07-13 19:37:24,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:24,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:24,909 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:24,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:24,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455136689] [2021-07-13 19:37:24,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455136689] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:24,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708706623] [2021-07-13 19:37:24,910 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 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:24,936 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:37:24,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:24,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:37:24,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:24,996 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:24,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708706623] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:24,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:24,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-13 19:37:24,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581101499] [2021-07-13 19:37:24,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:37:24,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:24,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:37:24,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:37:24,997 INFO L87 Difference]: Start difference. First operand 27032 states and 92418 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:25,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:25,332 INFO L93 Difference]: Finished difference Result 27914 states and 94767 transitions. [2021-07-13 19:37:25,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:37:25,333 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:37:25,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:25,403 INFO L225 Difference]: With dead ends: 27914 [2021-07-13 19:37:25,404 INFO L226 Difference]: Without dead ends: 27908 [2021-07-13 19:37:25,404 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 189.5ms TimeCoverageRelationStatistics Valid=348, Invalid=708, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:37:25,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27908 states. [2021-07-13 19:37:25,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27908 to 27045. [2021-07-13 19:37:26,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27045 states, 27044 states have (on average 3.419168762017453) internal successors, (92468), 27044 states have internal predecessors, (92468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:26,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27045 states to 27045 states and 92468 transitions. [2021-07-13 19:37:26,270 INFO L78 Accepts]: Start accepts. Automaton has 27045 states and 92468 transitions. Word has length 22 [2021-07-13 19:37:26,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:26,270 INFO L482 AbstractCegarLoop]: Abstraction has 27045 states and 92468 transitions. [2021-07-13 19:37:26,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:26,270 INFO L276 IsEmpty]: Start isEmpty. Operand 27045 states and 92468 transitions. [2021-07-13 19:37:26,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:37:26,279 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:26,279 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:26,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21588 [2021-07-13 19:37:26,480 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:26,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:26,480 INFO L82 PathProgramCache]: Analyzing trace with hash -55666140, now seen corresponding path program 223 times [2021-07-13 19:37:26,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:26,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008744794] [2021-07-13 19:37:26,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:26,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:26,548 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:26,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:26,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008744794] [2021-07-13 19:37:26,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008744794] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:26,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250046973] [2021-07-13 19:37:26,549 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 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:26,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:26,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:37:26,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:26,642 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:26,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250046973] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:26,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:26,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-13 19:37:26,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447286722] [2021-07-13 19:37:26,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:37:26,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:26,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:37:26,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:37:26,644 INFO L87 Difference]: Start difference. First operand 27045 states and 92468 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:26,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:26,994 INFO L93 Difference]: Finished difference Result 32148 states and 108873 transitions. [2021-07-13 19:37:26,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:37:26,995 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:37:26,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:27,078 INFO L225 Difference]: With dead ends: 32148 [2021-07-13 19:37:27,078 INFO L226 Difference]: Without dead ends: 32148 [2021-07-13 19:37:27,078 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 221.9ms TimeCoverageRelationStatistics Valid=399, Invalid=791, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:37:27,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32148 states. [2021-07-13 19:37:27,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32148 to 25053. [2021-07-13 19:37:27,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25053 states, 25052 states have (on average 3.419726967906754) internal successors, (85671), 25052 states have internal predecessors, (85671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:27,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25053 states to 25053 states and 85671 transitions. [2021-07-13 19:37:27,753 INFO L78 Accepts]: Start accepts. Automaton has 25053 states and 85671 transitions. Word has length 22 [2021-07-13 19:37:27,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:27,753 INFO L482 AbstractCegarLoop]: Abstraction has 25053 states and 85671 transitions. [2021-07-13 19:37:27,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:27,753 INFO L276 IsEmpty]: Start isEmpty. Operand 25053 states and 85671 transitions. [2021-07-13 19:37:27,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:37:27,762 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:27,762 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:27,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21589 [2021-07-13 19:37:27,962 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:27,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:27,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1064635363, now seen corresponding path program 224 times [2021-07-13 19:37:27,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:27,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496142413] [2021-07-13 19:37:27,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:27,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:28,153 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:28,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:28,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496142413] [2021-07-13 19:37:28,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496142413] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:28,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420320603] [2021-07-13 19:37:28,153 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 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:28,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:37:28,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:28,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:37:28,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:28,220 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 34 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:28,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420320603] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:28,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:28,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-13 19:37:28,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127322072] [2021-07-13 19:37:28,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:37:28,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:28,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:37:28,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:37:28,221 INFO L87 Difference]: Start difference. First operand 25053 states and 85671 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:28,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:28,541 INFO L93 Difference]: Finished difference Result 25874 states and 87890 transitions. [2021-07-13 19:37:28,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:37:28,542 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:37:28,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:28,610 INFO L225 Difference]: With dead ends: 25874 [2021-07-13 19:37:28,610 INFO L226 Difference]: Without dead ends: 25867 [2021-07-13 19:37:28,611 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 316.1ms TimeCoverageRelationStatistics Valid=349, Invalid=707, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:37:28,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25867 states. [2021-07-13 19:37:29,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25867 to 25080. [2021-07-13 19:37:29,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25080 states, 25079 states have (on average 3.419474460704175) internal successors, (85757), 25079 states have internal predecessors, (85757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:29,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25080 states to 25080 states and 85757 transitions. [2021-07-13 19:37:29,201 INFO L78 Accepts]: Start accepts. Automaton has 25080 states and 85757 transitions. Word has length 22 [2021-07-13 19:37:29,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:29,201 INFO L482 AbstractCegarLoop]: Abstraction has 25080 states and 85757 transitions. [2021-07-13 19:37:29,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:29,201 INFO L276 IsEmpty]: Start isEmpty. Operand 25080 states and 85757 transitions. [2021-07-13 19:37:29,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:37:29,210 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:29,210 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:29,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21590 [2021-07-13 19:37:29,410 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:29,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:29,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1323123318, now seen corresponding path program 225 times [2021-07-13 19:37:29,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:29,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349356174] [2021-07-13 19:37:29,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:29,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:29,483 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:29,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:29,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349356174] [2021-07-13 19:37:29,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349356174] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:29,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521037350] [2021-07-13 19:37:29,484 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 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:29,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:37:29,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:29,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:37:29,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:29,559 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:29,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521037350] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:29,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:29,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-13 19:37:29,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826189075] [2021-07-13 19:37:29,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:37:29,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:29,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:37:29,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:37:29,560 INFO L87 Difference]: Start difference. First operand 25080 states and 85757 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:30,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:30,148 INFO L93 Difference]: Finished difference Result 27927 states and 94333 transitions. [2021-07-13 19:37:30,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 19:37:30,149 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:37:30,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:30,244 INFO L225 Difference]: With dead ends: 27927 [2021-07-13 19:37:30,244 INFO L226 Difference]: Without dead ends: 27927 [2021-07-13 19:37:30,244 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 297.3ms TimeCoverageRelationStatistics Valid=642, Invalid=1250, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 19:37:30,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27927 states. [2021-07-13 19:37:30,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27927 to 25274. [2021-07-13 19:37:30,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25274 states, 25273 states have (on average 3.42104221896886) internal successors, (86460), 25273 states have internal predecessors, (86460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:30,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25274 states to 25274 states and 86460 transitions. [2021-07-13 19:37:30,888 INFO L78 Accepts]: Start accepts. Automaton has 25274 states and 86460 transitions. Word has length 22 [2021-07-13 19:37:30,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:30,888 INFO L482 AbstractCegarLoop]: Abstraction has 25274 states and 86460 transitions. [2021-07-13 19:37:30,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:30,888 INFO L276 IsEmpty]: Start isEmpty. Operand 25274 states and 86460 transitions. [2021-07-13 19:37:30,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:37:30,896 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:30,896 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:31,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21591,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:31,097 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:31,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:31,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1967599235, now seen corresponding path program 226 times [2021-07-13 19:37:31,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:31,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023305552] [2021-07-13 19:37:31,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:31,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:31,170 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:31,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:31,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023305552] [2021-07-13 19:37:31,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023305552] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:31,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868451583] [2021-07-13 19:37:31,170 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 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:31,195 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:37:31,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:31,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:37:31,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:31,240 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:31,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868451583] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:31,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:31,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-13 19:37:31,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162429537] [2021-07-13 19:37:31,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:37:31,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:31,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:37:31,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:37:31,241 INFO L87 Difference]: Start difference. First operand 25274 states and 86460 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:31,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:31,520 INFO L93 Difference]: Finished difference Result 27147 states and 92076 transitions. [2021-07-13 19:37:31,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:37:31,521 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:37:31,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:31,589 INFO L225 Difference]: With dead ends: 27147 [2021-07-13 19:37:31,589 INFO L226 Difference]: Without dead ends: 27142 [2021-07-13 19:37:31,590 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 141.0ms TimeCoverageRelationStatistics Valid=240, Invalid=516, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:37:31,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27142 states. [2021-07-13 19:37:32,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27142 to 25361. [2021-07-13 19:37:32,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25361 states, 25360 states have (on average 3.4214511041009463) internal successors, (86768), 25360 states have internal predecessors, (86768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:32,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25361 states to 25361 states and 86768 transitions. [2021-07-13 19:37:32,426 INFO L78 Accepts]: Start accepts. Automaton has 25361 states and 86768 transitions. Word has length 22 [2021-07-13 19:37:32,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:32,426 INFO L482 AbstractCegarLoop]: Abstraction has 25361 states and 86768 transitions. [2021-07-13 19:37:32,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:32,426 INFO L276 IsEmpty]: Start isEmpty. Operand 25361 states and 86768 transitions. [2021-07-13 19:37:32,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:37:32,435 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:32,435 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:32,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21592,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:32,635 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:32,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:32,635 INFO L82 PathProgramCache]: Analyzing trace with hash 205562928, now seen corresponding path program 227 times [2021-07-13 19:37:32,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:32,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086506569] [2021-07-13 19:37:32,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:32,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:32,703 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:32,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:32,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086506569] [2021-07-13 19:37:32,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086506569] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:32,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847659646] [2021-07-13 19:37:32,704 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 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:32,729 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:37:32,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:32,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:37:32,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:32,774 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:32,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847659646] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:32,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:32,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-13 19:37:32,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357486034] [2021-07-13 19:37:32,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:37:32,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:32,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:37:32,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:37:32,775 INFO L87 Difference]: Start difference. First operand 25361 states and 86768 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:33,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:33,042 INFO L93 Difference]: Finished difference Result 27451 states and 92974 transitions. [2021-07-13 19:37:33,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:37:33,042 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:37:33,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:33,112 INFO L225 Difference]: With dead ends: 27451 [2021-07-13 19:37:33,112 INFO L226 Difference]: Without dead ends: 27451 [2021-07-13 19:37:33,112 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 152.1ms TimeCoverageRelationStatistics Valid=287, Invalid=525, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:37:33,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27451 states. [2021-07-13 19:37:33,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27451 to 24554. [2021-07-13 19:37:33,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24554 states, 24553 states have (on average 3.42544699222091) internal successors, (84105), 24553 states have internal predecessors, (84105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:33,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24554 states to 24554 states and 84105 transitions. [2021-07-13 19:37:33,724 INFO L78 Accepts]: Start accepts. Automaton has 24554 states and 84105 transitions. Word has length 22 [2021-07-13 19:37:33,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:33,724 INFO L482 AbstractCegarLoop]: Abstraction has 24554 states and 84105 transitions. [2021-07-13 19:37:33,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:33,725 INFO L276 IsEmpty]: Start isEmpty. Operand 24554 states and 84105 transitions. [2021-07-13 19:37:33,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:37:33,733 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:33,733 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:33,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21593,229 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:33,933 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:33,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:33,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1524700095, now seen corresponding path program 228 times [2021-07-13 19:37:33,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:33,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370796210] [2021-07-13 19:37:33,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:33,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:34,008 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:34,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:34,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370796210] [2021-07-13 19:37:34,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370796210] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:34,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908898425] [2021-07-13 19:37:34,008 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 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:34,034 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:37:34,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:34,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:37:34,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:34,076 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:34,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908898425] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:34,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:34,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-13 19:37:34,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908050248] [2021-07-13 19:37:34,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:37:34,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:34,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:37:34,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:37:34,077 INFO L87 Difference]: Start difference. First operand 24554 states and 84105 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:34,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:34,421 INFO L93 Difference]: Finished difference Result 25024 states and 85353 transitions. [2021-07-13 19:37:34,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:37:34,421 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:37:34,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:34,481 INFO L225 Difference]: With dead ends: 25024 [2021-07-13 19:37:34,482 INFO L226 Difference]: Without dead ends: 25018 [2021-07-13 19:37:34,482 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 144.9ms TimeCoverageRelationStatistics Valid=236, Invalid=520, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:37:34,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25018 states. [2021-07-13 19:37:34,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25018 to 24554. [2021-07-13 19:37:34,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24554 states, 24553 states have (on average 3.4254062640003258) internal successors, (84104), 24553 states have internal predecessors, (84104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:35,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24554 states to 24554 states and 84104 transitions. [2021-07-13 19:37:35,059 INFO L78 Accepts]: Start accepts. Automaton has 24554 states and 84104 transitions. Word has length 22 [2021-07-13 19:37:35,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:35,060 INFO L482 AbstractCegarLoop]: Abstraction has 24554 states and 84104 transitions. [2021-07-13 19:37:35,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:35,060 INFO L276 IsEmpty]: Start isEmpty. Operand 24554 states and 84104 transitions. [2021-07-13 19:37:35,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:37:35,068 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:35,068 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:35,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21594 [2021-07-13 19:37:35,268 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:35,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:35,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1688697866, now seen corresponding path program 229 times [2021-07-13 19:37:35,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:35,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894281047] [2021-07-13 19:37:35,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:35,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:35,338 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:35,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:35,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894281047] [2021-07-13 19:37:35,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894281047] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:35,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628950732] [2021-07-13 19:37:35,338 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 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:35,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:35,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:37:35,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:35,409 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:35,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628950732] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:35,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:35,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-13 19:37:35,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370471059] [2021-07-13 19:37:35,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:37:35,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:35,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:37:35,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:37:35,410 INFO L87 Difference]: Start difference. First operand 24554 states and 84104 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:35,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:35,678 INFO L93 Difference]: Finished difference Result 25874 states and 87934 transitions. [2021-07-13 19:37:35,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:37:35,678 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:37:35,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:35,743 INFO L225 Difference]: With dead ends: 25874 [2021-07-13 19:37:35,744 INFO L226 Difference]: Without dead ends: 25874 [2021-07-13 19:37:35,744 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 170.3ms TimeCoverageRelationStatistics Valid=288, Invalid=582, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:37:35,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25874 states. [2021-07-13 19:37:36,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25874 to 24995. [2021-07-13 19:37:36,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24995 states, 24994 states have (on average 3.425342082099704) internal successors, (85613), 24994 states have internal predecessors, (85613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:36,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24995 states to 24995 states and 85613 transitions. [2021-07-13 19:37:36,377 INFO L78 Accepts]: Start accepts. Automaton has 24995 states and 85613 transitions. Word has length 22 [2021-07-13 19:37:36,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:36,378 INFO L482 AbstractCegarLoop]: Abstraction has 24995 states and 85613 transitions. [2021-07-13 19:37:36,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:36,378 INFO L276 IsEmpty]: Start isEmpty. Operand 24995 states and 85613 transitions. [2021-07-13 19:37:36,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:37:36,386 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:36,386 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:36,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21595 [2021-07-13 19:37:36,587 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:36,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:36,587 INFO L82 PathProgramCache]: Analyzing trace with hash 679728643, now seen corresponding path program 230 times [2021-07-13 19:37:36,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:36,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269706433] [2021-07-13 19:37:36,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:36,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:36,672 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:36,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:36,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269706433] [2021-07-13 19:37:36,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269706433] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:36,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412727097] [2021-07-13 19:37:36,673 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 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:36,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:37:36,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:36,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:37:36,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:36,864 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:36,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412727097] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:36,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:36,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-13 19:37:36,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873932160] [2021-07-13 19:37:36,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:37:36,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:36,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:37:36,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:37:36,865 INFO L87 Difference]: Start difference. First operand 24995 states and 85613 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:37,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:37,156 INFO L93 Difference]: Finished difference Result 25438 states and 86795 transitions. [2021-07-13 19:37:37,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:37:37,157 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:37:37,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:37,241 INFO L225 Difference]: With dead ends: 25438 [2021-07-13 19:37:37,242 INFO L226 Difference]: Without dead ends: 25431 [2021-07-13 19:37:37,242 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 159.1ms TimeCoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:37:37,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25431 states. [2021-07-13 19:37:37,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25431 to 24995. [2021-07-13 19:37:37,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24995 states, 24994 states have (on average 3.4253020724973995) internal successors, (85612), 24994 states have internal predecessors, (85612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:37,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24995 states to 24995 states and 85612 transitions. [2021-07-13 19:37:37,857 INFO L78 Accepts]: Start accepts. Automaton has 24995 states and 85612 transitions. Word has length 22 [2021-07-13 19:37:37,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:37,857 INFO L482 AbstractCegarLoop]: Abstraction has 24995 states and 85612 transitions. [2021-07-13 19:37:37,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:37,857 INFO L276 IsEmpty]: Start isEmpty. Operand 24995 states and 85612 transitions. [2021-07-13 19:37:37,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:37:37,865 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:37,865 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:38,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21596 [2021-07-13 19:37:38,066 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:38,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:38,066 INFO L82 PathProgramCache]: Analyzing trace with hash 421240688, now seen corresponding path program 231 times [2021-07-13 19:37:38,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:38,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053523334] [2021-07-13 19:37:38,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:38,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:38,139 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:38,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:38,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053523334] [2021-07-13 19:37:38,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053523334] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:38,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224850853] [2021-07-13 19:37:38,139 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 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:38,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:37:38,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:38,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:37:38,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:38,214 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:38,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224850853] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:38,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:38,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-13 19:37:38,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317461870] [2021-07-13 19:37:38,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:37:38,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:38,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:37:38,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:37:38,215 INFO L87 Difference]: Start difference. First operand 24995 states and 85612 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:38,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:38,602 INFO L93 Difference]: Finished difference Result 25599 states and 86951 transitions. [2021-07-13 19:37:38,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:37:38,602 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:37:38,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:38,812 INFO L225 Difference]: With dead ends: 25599 [2021-07-13 19:37:38,813 INFO L226 Difference]: Without dead ends: 25599 [2021-07-13 19:37:38,813 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 262.3ms TimeCoverageRelationStatistics Valid=518, Invalid=1042, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:37:38,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25599 states. [2021-07-13 19:37:39,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25599 to 25031. [2021-07-13 19:37:39,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25031 states, 25030 states have (on average 3.4251298441869755) internal successors, (85731), 25030 states have internal predecessors, (85731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:39,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25031 states to 25031 states and 85731 transitions. [2021-07-13 19:37:39,425 INFO L78 Accepts]: Start accepts. Automaton has 25031 states and 85731 transitions. Word has length 22 [2021-07-13 19:37:39,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:39,425 INFO L482 AbstractCegarLoop]: Abstraction has 25031 states and 85731 transitions. [2021-07-13 19:37:39,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:39,425 INFO L276 IsEmpty]: Start isEmpty. Operand 25031 states and 85731 transitions. [2021-07-13 19:37:39,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:37:39,434 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:39,434 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:39,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21597 [2021-07-13 19:37:39,634 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:39,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:39,634 INFO L82 PathProgramCache]: Analyzing trace with hash 255417407, now seen corresponding path program 232 times [2021-07-13 19:37:39,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:39,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537312993] [2021-07-13 19:37:39,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:39,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:39,716 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 39 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:39,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:39,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537312993] [2021-07-13 19:37:39,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537312993] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:39,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27467083] [2021-07-13 19:37:39,716 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 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:39,741 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:37:39,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:39,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:37:39,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:39,784 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:39,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27467083] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:39,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:39,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-13 19:37:39,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054341673] [2021-07-13 19:37:39,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:37:39,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:39,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:37:39,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:37:39,784 INFO L87 Difference]: Start difference. First operand 25031 states and 85731 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:40,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:40,028 INFO L93 Difference]: Finished difference Result 25442 states and 86842 transitions. [2021-07-13 19:37:40,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:37:40,029 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:37:40,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:40,095 INFO L225 Difference]: With dead ends: 25442 [2021-07-13 19:37:40,095 INFO L226 Difference]: Without dead ends: 25434 [2021-07-13 19:37:40,095 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 159.3ms TimeCoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:37:40,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25434 states. [2021-07-13 19:37:40,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25434 to 25031. [2021-07-13 19:37:40,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25031 states, 25030 states have (on average 3.425089892129445) internal successors, (85730), 25030 states have internal predecessors, (85730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:40,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25031 states to 25031 states and 85730 transitions. [2021-07-13 19:37:40,705 INFO L78 Accepts]: Start accepts. Automaton has 25031 states and 85730 transitions. Word has length 22 [2021-07-13 19:37:40,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:40,705 INFO L482 AbstractCegarLoop]: Abstraction has 25031 states and 85730 transitions. [2021-07-13 19:37:40,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:40,705 INFO L276 IsEmpty]: Start isEmpty. Operand 25031 states and 85730 transitions. [2021-07-13 19:37:40,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:37:40,713 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:40,713 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:40,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21598 [2021-07-13 19:37:40,914 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:40,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:40,914 INFO L82 PathProgramCache]: Analyzing trace with hash -215226166, now seen corresponding path program 233 times [2021-07-13 19:37:40,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:40,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879729526] [2021-07-13 19:37:40,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:40,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:40,992 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:40,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:40,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879729526] [2021-07-13 19:37:40,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879729526] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:40,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450144537] [2021-07-13 19:37:40,992 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 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:41,021 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:37:41,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:41,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:37:41,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:41,067 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:41,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450144537] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:41,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:41,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-13 19:37:41,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472919376] [2021-07-13 19:37:41,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:37:41,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:41,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:37:41,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:37:41,068 INFO L87 Difference]: Start difference. First operand 25031 states and 85730 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:41,359 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-07-13 19:37:41,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:41,652 INFO L93 Difference]: Finished difference Result 25692 states and 87163 transitions. [2021-07-13 19:37:41,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 19:37:41,652 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:37:41,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:41,719 INFO L225 Difference]: With dead ends: 25692 [2021-07-13 19:37:41,719 INFO L226 Difference]: Without dead ends: 25692 [2021-07-13 19:37:41,719 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 455.7ms TimeCoverageRelationStatistics Valid=753, Invalid=1503, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 19:37:41,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25692 states. [2021-07-13 19:37:42,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25692 to 25022. [2021-07-13 19:37:42,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25022 states, 25021 states have (on average 3.4252427960513168) internal successors, (85703), 25021 states have internal predecessors, (85703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:42,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25022 states to 25022 states and 85703 transitions. [2021-07-13 19:37:42,324 INFO L78 Accepts]: Start accepts. Automaton has 25022 states and 85703 transitions. Word has length 22 [2021-07-13 19:37:42,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:42,324 INFO L482 AbstractCegarLoop]: Abstraction has 25022 states and 85703 transitions. [2021-07-13 19:37:42,325 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:42,325 INFO L276 IsEmpty]: Start isEmpty. Operand 25022 states and 85703 transitions. [2021-07-13 19:37:42,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:37:42,333 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:42,333 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:42,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21599 [2021-07-13 19:37:42,537 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:42,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:42,537 INFO L82 PathProgramCache]: Analyzing trace with hash -457840953, now seen corresponding path program 234 times [2021-07-13 19:37:42,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:42,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379997563] [2021-07-13 19:37:42,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:42,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:42,600 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 36 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:42,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:42,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379997563] [2021-07-13 19:37:42,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379997563] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:42,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771664095] [2021-07-13 19:37:42,600 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 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:42,627 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 19:37:42,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:42,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:37:42,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:42,666 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 37 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:37:42,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771664095] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:42,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:42,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:37:42,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83067932] [2021-07-13 19:37:42,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:37:42,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:42,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:37:42,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=119, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:37:42,667 INFO L87 Difference]: Start difference. First operand 25022 states and 85703 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:42,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:42,842 INFO L93 Difference]: Finished difference Result 25353 states and 86224 transitions. [2021-07-13 19:37:42,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:37:42,842 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:37:42,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:42,904 INFO L225 Difference]: With dead ends: 25353 [2021-07-13 19:37:42,904 INFO L226 Difference]: Without dead ends: 25353 [2021-07-13 19:37:42,904 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 67.5ms TimeCoverageRelationStatistics Valid=119, Invalid=153, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:37:42,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25353 states. [2021-07-13 19:37:43,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25353 to 25033. [2021-07-13 19:37:43,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25033 states, 25032 states have (on average 3.4251757750079896) internal successors, (85739), 25032 states have internal predecessors, (85739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:43,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25033 states to 25033 states and 85739 transitions. [2021-07-13 19:37:43,775 INFO L78 Accepts]: Start accepts. Automaton has 25033 states and 85739 transitions. Word has length 22 [2021-07-13 19:37:43,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:43,775 INFO L482 AbstractCegarLoop]: Abstraction has 25033 states and 85739 transitions. [2021-07-13 19:37:43,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:43,775 INFO L276 IsEmpty]: Start isEmpty. Operand 25033 states and 85739 transitions. [2021-07-13 19:37:43,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:37:43,784 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:43,784 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:43,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21600,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:43,984 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:43,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:43,985 INFO L82 PathProgramCache]: Analyzing trace with hash 625449180, now seen corresponding path program 235 times [2021-07-13 19:37:43,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:43,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237777936] [2021-07-13 19:37:43,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:43,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:44,044 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:44,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:44,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237777936] [2021-07-13 19:37:44,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237777936] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:44,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389549828] [2021-07-13 19:37:44,045 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 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:44,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:44,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:37:44,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:44,104 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:37:44,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389549828] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:44,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:44,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:37:44,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004285909] [2021-07-13 19:37:44,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:37:44,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:44,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:37:44,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:37:44,105 INFO L87 Difference]: Start difference. First operand 25033 states and 85739 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:44,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:44,374 INFO L93 Difference]: Finished difference Result 25371 states and 86392 transitions. [2021-07-13 19:37:44,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:37:44,374 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:37:44,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:44,440 INFO L225 Difference]: With dead ends: 25371 [2021-07-13 19:37:44,440 INFO L226 Difference]: Without dead ends: 25367 [2021-07-13 19:37:44,440 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 125.3ms TimeCoverageRelationStatistics Valid=239, Invalid=411, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:37:44,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25367 states. [2021-07-13 19:37:44,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25367 to 25136. [2021-07-13 19:37:44,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25136 states, 25135 states have (on average 3.4247065844440026) internal successors, (86080), 25135 states have internal predecessors, (86080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:45,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25136 states to 25136 states and 86080 transitions. [2021-07-13 19:37:45,051 INFO L78 Accepts]: Start accepts. Automaton has 25136 states and 86080 transitions. Word has length 22 [2021-07-13 19:37:45,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:45,051 INFO L482 AbstractCegarLoop]: Abstraction has 25136 states and 86080 transitions. [2021-07-13 19:37:45,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:45,051 INFO L276 IsEmpty]: Start isEmpty. Operand 25136 states and 86080 transitions. [2021-07-13 19:37:45,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:37:45,060 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:45,060 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:45,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21601 [2021-07-13 19:37:45,261 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:45,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:45,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1282251357, now seen corresponding path program 236 times [2021-07-13 19:37:45,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:45,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590127603] [2021-07-13 19:37:45,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:45,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:45,324 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:45,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:45,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590127603] [2021-07-13 19:37:45,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590127603] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:45,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273509333] [2021-07-13 19:37:45,324 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 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:45,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:37:45,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:45,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:37:45,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:45,383 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 41 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:45,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273509333] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:45,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:45,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:37:45,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800086315] [2021-07-13 19:37:45,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:37:45,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:45,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:37:45,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=119, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:37:45,384 INFO L87 Difference]: Start difference. First operand 25136 states and 86080 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:45,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:45,814 INFO L93 Difference]: Finished difference Result 25448 states and 86549 transitions. [2021-07-13 19:37:45,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:37:45,815 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:37:45,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:45,886 INFO L225 Difference]: With dead ends: 25448 [2021-07-13 19:37:45,886 INFO L226 Difference]: Without dead ends: 25447 [2021-07-13 19:37:45,886 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 120.9ms TimeCoverageRelationStatistics Valid=245, Invalid=405, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:37:45,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25447 states. [2021-07-13 19:37:46,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25447 to 25136. [2021-07-13 19:37:46,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25136 states, 25135 states have (on average 3.424070021881838) internal successors, (86064), 25135 states have internal predecessors, (86064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:46,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25136 states to 25136 states and 86064 transitions. [2021-07-13 19:37:46,513 INFO L78 Accepts]: Start accepts. Automaton has 25136 states and 86064 transitions. Word has length 22 [2021-07-13 19:37:46,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:46,514 INFO L482 AbstractCegarLoop]: Abstraction has 25136 states and 86064 transitions. [2021-07-13 19:37:46,514 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:46,514 INFO L276 IsEmpty]: Start isEmpty. Operand 25136 states and 86064 transitions. [2021-07-13 19:37:46,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:37:46,522 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:46,522 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:46,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21602,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:46,723 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:46,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:46,723 INFO L82 PathProgramCache]: Analyzing trace with hash -2090297206, now seen corresponding path program 237 times [2021-07-13 19:37:46,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:46,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852208184] [2021-07-13 19:37:46,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:46,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:46,782 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:46,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:46,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852208184] [2021-07-13 19:37:46,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852208184] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:46,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968477525] [2021-07-13 19:37:46,783 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 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:46,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 19:37:46,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:46,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:37:46,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:46,847 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:46,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968477525] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:46,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:46,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:37:46,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519166400] [2021-07-13 19:37:46,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:37:46,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:46,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:37:46,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:37:46,848 INFO L87 Difference]: Start difference. First operand 25136 states and 86064 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:47,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:47,033 INFO L93 Difference]: Finished difference Result 25635 states and 87128 transitions. [2021-07-13 19:37:47,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:37:47,033 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:37:47,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:47,096 INFO L225 Difference]: With dead ends: 25635 [2021-07-13 19:37:47,096 INFO L226 Difference]: Without dead ends: 25635 [2021-07-13 19:37:47,096 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 76.1ms TimeCoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:37:47,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25635 states. [2021-07-13 19:37:47,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25635 to 25162. [2021-07-13 19:37:47,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25162 states, 25161 states have (on average 3.4235920670879536) internal successors, (86141), 25161 states have internal predecessors, (86141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:47,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25162 states to 25162 states and 86141 transitions. [2021-07-13 19:37:47,722 INFO L78 Accepts]: Start accepts. Automaton has 25162 states and 86141 transitions. Word has length 22 [2021-07-13 19:37:47,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:47,722 INFO L482 AbstractCegarLoop]: Abstraction has 25162 states and 86141 transitions. [2021-07-13 19:37:47,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:47,723 INFO L276 IsEmpty]: Start isEmpty. Operand 25162 states and 86141 transitions. [2021-07-13 19:37:47,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:37:47,732 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:47,732 INFO L508 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:47,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21603,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:47,932 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:47,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:47,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1302102631, now seen corresponding path program 238 times [2021-07-13 19:37:47,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:47,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099241565] [2021-07-13 19:37:47,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:47,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:47,995 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 34 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:47,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:47,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099241565] [2021-07-13 19:37:47,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099241565] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:47,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315998271] [2021-07-13 19:37:47,996 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 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:48,019 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:37:48,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:48,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:37:48,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:48,060 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:48,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315998271] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:48,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:48,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-13 19:37:48,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279583889] [2021-07-13 19:37:48,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:37:48,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:48,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:37:48,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:37:48,062 INFO L87 Difference]: Start difference. First operand 25162 states and 86141 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:48,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:48,522 INFO L93 Difference]: Finished difference Result 25479 states and 86617 transitions. [2021-07-13 19:37:48,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:37:48,522 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:37:48,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:48,590 INFO L225 Difference]: With dead ends: 25479 [2021-07-13 19:37:48,590 INFO L226 Difference]: Without dead ends: 25477 [2021-07-13 19:37:48,590 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 134.3ms TimeCoverageRelationStatistics Valid=274, Invalid=482, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:37:48,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25477 states. [2021-07-13 19:37:49,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25477 to 25162. [2021-07-13 19:37:49,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25162 states, 25161 states have (on average 3.4234728349429675) internal successors, (86138), 25161 states have internal predecessors, (86138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:49,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25162 states to 25162 states and 86138 transitions. [2021-07-13 19:37:49,191 INFO L78 Accepts]: Start accepts. Automaton has 25162 states and 86138 transitions. Word has length 22 [2021-07-13 19:37:49,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:49,191 INFO L482 AbstractCegarLoop]: Abstraction has 25162 states and 86138 transitions. [2021-07-13 19:37:49,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:49,191 INFO L276 IsEmpty]: Start isEmpty. Operand 25162 states and 86138 transitions. [2021-07-13 19:37:49,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:37:49,200 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:49,200 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] Received shutdown request... [2021-07-13 19:37:49,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21604,240 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:49,400 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:49,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:49,400 INFO L82 PathProgramCache]: Analyzing trace with hash 475622756, now seen corresponding path program 239 times [2021-07-13 19:37:49,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:49,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874446511] [2021-07-13 19:37:49,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:49,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2021-07-13 19:37:49,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1543730084] [2021-07-13 19:37:49,403 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 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:49,429 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-13 19:37:49,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:49,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:37:49,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:49,432 WARN L222 SmtUtils]: Removed 1 from assertion stack [2021-07-13 19:37:49,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21605,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:49,633 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-13 19:37:49,635 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-13 19:37:49,637 WARN L196 ceAbstractionStarter]: Timeout [2021-07-13 19:37:49,637 INFO L202 PluginConnector]: Adding new model unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.07 07:37:49 BasicIcfg [2021-07-13 19:37:49,637 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-13 19:37:49,638 INFO L168 Benchmark]: Toolchain (without parser) took 844954.17 ms. Allocated memory was 204.5 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 185.5 MB in the beginning and 6.2 GB in the end (delta: -6.0 GB). Peak memory consumption was 1.8 GB. Max. memory is 8.0 GB. [2021-07-13 19:37:49,638 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 204.5 MB. Free memory is still 186.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-13 19:37:49,638 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.61 ms. Allocated memory is still 204.5 MB. Free memory was 185.3 MB in the beginning and 183.9 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-07-13 19:37:49,638 INFO L168 Benchmark]: Boogie Preprocessor took 15.31 ms. Allocated memory is still 204.5 MB. Free memory was 183.9 MB in the beginning and 183.0 MB in the end (delta: 938.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-07-13 19:37:49,638 INFO L168 Benchmark]: RCFGBuilder took 378.35 ms. Allocated memory is still 204.5 MB. Free memory was 182.9 MB in the beginning and 165.1 MB in the end (delta: 17.7 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. [2021-07-13 19:37:49,639 INFO L168 Benchmark]: TraceAbstraction took 844519.84 ms. Allocated memory was 204.5 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 164.7 MB in the beginning and 6.2 GB in the end (delta: -6.0 GB). Peak memory consumption was 1.8 GB. Max. memory is 8.0 GB. [2021-07-13 19:37:49,639 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 204.5 MB. Free memory is still 186.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 28.61 ms. Allocated memory is still 204.5 MB. Free memory was 185.3 MB in the beginning and 183.9 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Preprocessor took 15.31 ms. Allocated memory is still 204.5 MB. Free memory was 183.9 MB in the beginning and 183.0 MB in the end (delta: 938.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 378.35 ms. Allocated memory is still 204.5 MB. Free memory was 182.9 MB in the beginning and 165.1 MB in the end (delta: 17.7 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 844519.84 ms. Allocated memory was 204.5 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 164.7 MB in the beginning and 6.2 GB in the end (delta: -6.0 GB). Peak memory consumption was 1.8 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 10,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 0ms.. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 20 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 844399.1ms, OverallIterations: 243, TraceHistogramMax: 11, EmptinessCheckTime: 1136.4ms, AutomataDifference: 69202.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 21.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 5442 SDtfs, 20142 SDslu, 33345 SDs, 0 SdLazy, 35699 SolverSat, 5506 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 15238.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9838 GetRequests, 4549 SyntacticMatches, 111 SemanticMatches, 5178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29616 ImplicationChecksByTransitivity, 33818.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=51187occurred in iteration=151, InterpolantAutomatonStates: 4863, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 87725.6ms AutomataMinimizationTime, 242 MinimizatonAttempts, 208066 StatesRemovedByMinimization, 235 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 817.3ms SsaConstructionTime, 3075.4ms SatisfiabilityAnalysisTime, 627681.9ms InterpolantComputationTime, 9699 NumberOfCodeBlocks, 9698 NumberOfCodeBlocksAsserted, 1094 NumberOfCheckSat, 9218 ConstructedInterpolants, 0 QuantifiedInterpolants, 40888 SizeOfPredicates, 157 NumberOfNonLiveVariables, 19629 ConjunctsInSsa, 3435 ConjunctsInUnsatCore, 481 InterpolantComputations, 3 PerfectInterpolantSequences, 8487/24904 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown