/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/test/easy1.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a47a088281b0b97d17910950432b7c5b5bc3adeb-a47a088 [2021-07-13 20:49:41,701 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-13 20:49:41,703 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-13 20:49:41,742 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-13 20:49:41,803 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 20:49:41,844 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-13 20:49:41,844 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-13 20:49:41,845 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-13 20:49:41,845 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-13 20:49:41,848 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-13 20:49:41,848 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-13 20:49:41,848 INFO L138 SettingsManager]: * Use SBE=true [2021-07-13 20:49:41,848 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-13 20:49:41,848 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-13 20:49:41,849 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-13 20:49:41,849 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-13 20:49:41,850 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-13 20:49:41,850 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-13 20:49:41,850 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-13 20:49:41,850 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-13 20:49:41,850 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-13 20:49:41,850 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-13 20:49:41,850 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-13 20:49:41,850 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-13 20:49:41,851 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-13 20:49:41,851 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-13 20:49:41,851 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-13 20:49:41,851 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-13 20:49:41,851 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 20:49:41,851 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-13 20:49:41,852 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-13 20:49:41,852 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-13 20:49:41,852 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-13 20:49:41,852 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-13 20:49:41,852 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-13 20:49:41,852 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-13 20:49:41,852 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-13 20:49:42,163 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-13 20:49:42,180 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-13 20:49:42,182 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-13 20:49:42,183 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-13 20:49:42,184 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-13 20:49:42,185 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/easy1.wvr.bpl [2021-07-13 20:49:42,185 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/easy1.wvr.bpl' [2021-07-13 20:49:42,213 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-13 20:49:42,215 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-13 20:49:42,216 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-13 20:49:42,216 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-13 20:49:42,216 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-13 20:49:42,225 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:49:42" (1/1) ... [2021-07-13 20:49:42,230 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:49:42" (1/1) ... [2021-07-13 20:49:42,236 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-13 20:49:42,237 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-13 20:49:42,238 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-13 20:49:42,238 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-13 20:49:42,243 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:49:42" (1/1) ... [2021-07-13 20:49:42,243 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:49:42" (1/1) ... [2021-07-13 20:49:42,243 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:49:42" (1/1) ... [2021-07-13 20:49:42,244 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:49:42" (1/1) ... [2021-07-13 20:49:42,245 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:49:42" (1/1) ... [2021-07-13 20:49:42,247 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:49:42" (1/1) ... [2021-07-13 20:49:42,248 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:49:42" (1/1) ... [2021-07-13 20:49:42,249 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-13 20:49:42,249 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-13 20:49:42,249 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-13 20:49:42,250 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-13 20:49:42,251 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:49:42" (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 20:49:42,302 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-13 20:49:42,302 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-13 20:49:42,302 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-13 20:49:42,302 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-13 20:49:42,303 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-13 20:49:42,303 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-13 20:49:42,303 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-13 20:49:42,303 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-13 20:49:42,303 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-13 20:49:42,304 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 20:49:42,427 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-13 20:49:42,428 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-13 20:49:42,429 INFO L202 PluginConnector]: Adding new model easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:49:42 BoogieIcfgContainer [2021-07-13 20:49:42,429 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-13 20:49:42,431 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-13 20:49:42,431 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-13 20:49:42,433 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-13 20:49:42,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:49:42" (1/2) ... [2021-07-13 20:49:42,435 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5221f81e and model type easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 08:49:42, skipping insertion in model container [2021-07-13 20:49:42,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:49:42" (2/2) ... [2021-07-13 20:49:42,436 INFO L111 eAbstractionObserver]: Analyzing ICFG easy1.wvr.bpl [2021-07-13 20:49:42,441 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-13 20:49:42,441 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-13 20:49:42,441 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-13 20:49:42,442 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-13 20:49:42,469 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-07-13 20:49:42,490 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-07-13 20:49:42,506 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 20:49:42,506 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 20:49:42,506 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 20:49:42,506 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 20:49:42,506 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 20:49:42,507 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 20:49:42,507 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 20:49:42,507 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-13 20:49:42,514 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 24 places, 19 transitions, 54 flow [2021-07-13 20:49:42,525 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 29 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:42,527 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:42,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-07-13 20:49:42,533 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:42,534 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:42,534 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:42,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:42,539 INFO L82 PathProgramCache]: Analyzing trace with hash -64585265, now seen corresponding path program 1 times [2021-07-13 20:49:42,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:42,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57026121] [2021-07-13 20:49:42,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:42,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:42,773 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 20:49:42,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:42,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57026121] [2021-07-13 20:49:42,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57026121] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:49:42,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:49:42,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-13 20:49:42,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38572619] [2021-07-13 20:49:42,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 20:49:42,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:42,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 20:49:42,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:49:42,800 INFO L87 Difference]: Start difference. First operand has 29 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 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 20:49:42,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:42,858 INFO L93 Difference]: Finished difference Result 54 states and 102 transitions. [2021-07-13 20:49:42,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 20:49:42,860 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 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 20:49:42,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:42,874 INFO L225 Difference]: With dead ends: 54 [2021-07-13 20:49:42,875 INFO L226 Difference]: Without dead ends: 47 [2021-07-13 20:49:42,876 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:49:42,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-07-13 20:49:42,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 38. [2021-07-13 20:49:42,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 37 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:42,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 71 transitions. [2021-07-13 20:49:42,924 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 71 transitions. Word has length 11 [2021-07-13 20:49:42,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:42,925 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 71 transitions. [2021-07-13 20:49:42,925 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 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 20:49:42,926 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 71 transitions. [2021-07-13 20:49:42,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 20:49:42,928 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:42,928 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:42,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-13 20:49:42,929 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:42,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:42,933 INFO L82 PathProgramCache]: Analyzing trace with hash 732040657, now seen corresponding path program 1 times [2021-07-13 20:49:42,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:42,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605174999] [2021-07-13 20:49:42,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:42,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:42,973 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 20:49:42,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:42,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605174999] [2021-07-13 20:49:42,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605174999] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:42,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780144889] [2021-07-13 20:49:42,974 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 20:49:43,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:43,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 3 conjunts are in the unsatisfiable core [2021-07-13 20:49:43,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:43,074 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 20:49:43,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780144889] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:43,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:43,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-07-13 20:49:43,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973330979] [2021-07-13 20:49:43,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 20:49:43,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:43,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 20:49:43,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 20:49:43,077 INFO L87 Difference]: Start difference. First operand 38 states and 71 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:43,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:43,117 INFO L93 Difference]: Finished difference Result 61 states and 109 transitions. [2021-07-13 20:49:43,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 20:49:43,117 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have 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 20:49:43,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:43,122 INFO L225 Difference]: With dead ends: 61 [2021-07-13 20:49:43,122 INFO L226 Difference]: Without dead ends: 61 [2021-07-13 20:49:43,122 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:49:43,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-07-13 20:49:43,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 38. [2021-07-13 20:49:43,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.972972972972973) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:43,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 73 transitions. [2021-07-13 20:49:43,128 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 73 transitions. Word has length 13 [2021-07-13 20:49:43,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:43,128 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 73 transitions. [2021-07-13 20:49:43,128 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:43,128 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 73 transitions. [2021-07-13 20:49:43,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 20:49:43,129 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:43,129 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:43,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-07-13 20:49:43,339 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:43,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:43,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1434845965, now seen corresponding path program 1 times [2021-07-13 20:49:43,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:43,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435715168] [2021-07-13 20:49:43,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:43,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:43,360 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 20:49:43,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:43,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435715168] [2021-07-13 20:49:43,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435715168] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:49:43,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:49:43,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 20:49:43,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283872571] [2021-07-13 20:49:43,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 20:49:43,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:43,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 20:49:43,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 20:49:43,363 INFO L87 Difference]: Start difference. First operand 38 states and 73 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:43,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:43,426 INFO L93 Difference]: Finished difference Result 68 states and 122 transitions. [2021-07-13 20:49:43,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 20:49:43,427 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have 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 20:49:43,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:43,428 INFO L225 Difference]: With dead ends: 68 [2021-07-13 20:49:43,428 INFO L226 Difference]: Without dead ends: 63 [2021-07-13 20:49:43,428 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:49:43,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-07-13 20:49:43,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2021-07-13 20:49:43,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:43,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 88 transitions. [2021-07-13 20:49:43,435 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 88 transitions. Word has length 13 [2021-07-13 20:49:43,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:43,435 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 88 transitions. [2021-07-13 20:49:43,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:43,435 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 88 transitions. [2021-07-13 20:49:43,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 20:49:43,436 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:43,436 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:43,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-13 20:49:43,437 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:43,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:43,437 INFO L82 PathProgramCache]: Analyzing trace with hash 169918105, now seen corresponding path program 2 times [2021-07-13 20:49:43,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:43,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319381510] [2021-07-13 20:49:43,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:43,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:43,464 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 20:49:43,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:43,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319381510] [2021-07-13 20:49:43,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319381510] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:49:43,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:49:43,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 20:49:43,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416458281] [2021-07-13 20:49:43,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 20:49:43,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:43,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 20:49:43,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 20:49:43,467 INFO L87 Difference]: Start difference. First operand 46 states and 88 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:43,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:43,522 INFO L93 Difference]: Finished difference Result 48 states and 91 transitions. [2021-07-13 20:49:43,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 20:49:43,523 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have 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 20:49:43,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:43,527 INFO L225 Difference]: With dead ends: 48 [2021-07-13 20:49:43,527 INFO L226 Difference]: Without dead ends: 48 [2021-07-13 20:49:43,527 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:49:43,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-07-13 20:49:43,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 40. [2021-07-13 20:49:43,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:43,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 76 transitions. [2021-07-13 20:49:43,532 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 76 transitions. Word has length 13 [2021-07-13 20:49:43,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:43,533 INFO L482 AbstractCegarLoop]: Abstraction has 40 states and 76 transitions. [2021-07-13 20:49:43,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:43,533 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 76 transitions. [2021-07-13 20:49:43,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 20:49:43,533 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:43,534 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:43,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-13 20:49:43,534 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:43,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:43,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1213979977, now seen corresponding path program 2 times [2021-07-13 20:49:43,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:43,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216180755] [2021-07-13 20:49:43,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:43,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:43,577 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 20:49:43,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:43,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216180755] [2021-07-13 20:49:43,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216180755] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:49:43,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:49:43,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 20:49:43,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371933206] [2021-07-13 20:49:43,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 20:49:43,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:43,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 20:49:43,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 20:49:43,582 INFO L87 Difference]: Start difference. First operand 40 states and 76 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:43,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:43,627 INFO L93 Difference]: Finished difference Result 48 states and 89 transitions. [2021-07-13 20:49:43,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 20:49:43,627 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have 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 20:49:43,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:43,629 INFO L225 Difference]: With dead ends: 48 [2021-07-13 20:49:43,629 INFO L226 Difference]: Without dead ends: 46 [2021-07-13 20:49:43,629 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:49:43,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-07-13 20:49:43,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2021-07-13 20:49:43,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.9230769230769231) internal successors, (75), 39 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:43,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 75 transitions. [2021-07-13 20:49:43,642 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 75 transitions. Word has length 13 [2021-07-13 20:49:43,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:43,642 INFO L482 AbstractCegarLoop]: Abstraction has 40 states and 75 transitions. [2021-07-13 20:49:43,642 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:43,642 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 75 transitions. [2021-07-13 20:49:43,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 20:49:43,643 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:43,643 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:43,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-07-13 20:49:43,643 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:43,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:43,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1806788977, now seen corresponding path program 1 times [2021-07-13 20:49:43,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:43,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109445806] [2021-07-13 20:49:43,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:43,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:43,757 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:43,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:43,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109445806] [2021-07-13 20:49:43,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109445806] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:43,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512832949] [2021-07-13 20:49:43,758 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 20:49:43,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:43,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:49:43,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:43,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:43,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512832949] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:43,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:43,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3] total 7 [2021-07-13 20:49:43,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218440388] [2021-07-13 20:49:43,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:49:43,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:43,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:49:43,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:49:43,905 INFO L87 Difference]: Start difference. First operand 40 states and 75 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:44,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:44,053 INFO L93 Difference]: Finished difference Result 129 states and 238 transitions. [2021-07-13 20:49:44,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 20:49:44,054 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 20:49:44,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:44,056 INFO L225 Difference]: With dead ends: 129 [2021-07-13 20:49:44,056 INFO L226 Difference]: Without dead ends: 122 [2021-07-13 20:49:44,061 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 139.1ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:49:44,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-07-13 20:49:44,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 64. [2021-07-13 20:49:44,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.0634920634920637) internal successors, (130), 63 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:44,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 130 transitions. [2021-07-13 20:49:44,074 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 130 transitions. Word has length 15 [2021-07-13 20:49:44,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:44,074 INFO L482 AbstractCegarLoop]: Abstraction has 64 states and 130 transitions. [2021-07-13 20:49:44,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:44,075 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 130 transitions. [2021-07-13 20:49:44,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 20:49:44,075 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:44,076 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:44,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:44,293 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:44,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:44,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1307356559, now seen corresponding path program 2 times [2021-07-13 20:49:44,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:44,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360607093] [2021-07-13 20:49:44,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:44,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:44,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:44,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:44,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360607093] [2021-07-13 20:49:44,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360607093] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:44,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3174873] [2021-07-13 20:49:44,374 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 20:49:44,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:49:44,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:44,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:49:44,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:44,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:49:44,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3174873] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:49:44,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-13 20:49:44,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-07-13 20:49:44,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901622118] [2021-07-13 20:49:44,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 20:49:44,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:44,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 20:49:44,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:49:44,497 INFO L87 Difference]: Start difference. First operand 64 states and 130 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:44,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:44,536 INFO L93 Difference]: Finished difference Result 114 states and 226 transitions. [2021-07-13 20:49:44,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 20:49:44,536 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have 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 20:49:44,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:44,537 INFO L225 Difference]: With dead ends: 114 [2021-07-13 20:49:44,537 INFO L226 Difference]: Without dead ends: 107 [2021-07-13 20:49:44,538 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 39.3ms TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:49:44,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-07-13 20:49:44,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 82. [2021-07-13 20:49:44,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.1481481481481484) internal successors, (174), 81 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:44,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 174 transitions. [2021-07-13 20:49:44,550 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 174 transitions. Word has length 15 [2021-07-13 20:49:44,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:44,550 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 174 transitions. [2021-07-13 20:49:44,550 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:44,550 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 174 transitions. [2021-07-13 20:49:44,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 20:49:44,551 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:44,551 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:44,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:44,774 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:44,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:44,775 INFO L82 PathProgramCache]: Analyzing trace with hash -2080643123, now seen corresponding path program 3 times [2021-07-13 20:49:44,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:44,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301267522] [2021-07-13 20:49:44,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:44,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:44,812 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:44,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:44,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301267522] [2021-07-13 20:49:44,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301267522] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:44,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947401218] [2021-07-13 20:49:44,813 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 20:49:44,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:49:44,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:44,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 20:49:44,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:44,916 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:44,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947401218] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:44,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:44,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-13 20:49:44,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048049600] [2021-07-13 20:49:44,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 20:49:44,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:44,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 20:49:44,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:49:44,918 INFO L87 Difference]: Start difference. First operand 82 states and 174 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 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 20:49:44,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:44,990 INFO L93 Difference]: Finished difference Result 146 states and 283 transitions. [2021-07-13 20:49:44,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:49:44,991 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 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 17 [2021-07-13 20:49:44,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:44,992 INFO L225 Difference]: With dead ends: 146 [2021-07-13 20:49:44,992 INFO L226 Difference]: Without dead ends: 135 [2021-07-13 20:49:44,992 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 34.7ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:49:44,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-07-13 20:49:44,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 102. [2021-07-13 20:49:44,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.1485148514851486) internal successors, (217), 101 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:44,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 217 transitions. [2021-07-13 20:49:44,998 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 217 transitions. Word has length 17 [2021-07-13 20:49:44,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:44,998 INFO L482 AbstractCegarLoop]: Abstraction has 102 states and 217 transitions. [2021-07-13 20:49:44,998 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 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 20:49:44,998 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 217 transitions. [2021-07-13 20:49:44,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 20:49:44,999 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:44,999 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:45,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:45,223 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:45,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:45,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1376961195, now seen corresponding path program 4 times [2021-07-13 20:49:45,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:45,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931464795] [2021-07-13 20:49:45,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:45,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:45,249 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:45,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:45,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931464795] [2021-07-13 20:49:45,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931464795] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:45,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662005842] [2021-07-13 20:49:45,250 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 20:49:45,273 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:49:45,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:45,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 20:49:45,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:45,315 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:45,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662005842] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:45,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:45,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-07-13 20:49:45,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170965347] [2021-07-13 20:49:45,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 20:49:45,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:45,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 20:49:45,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:49:45,317 INFO L87 Difference]: Start difference. First operand 102 states and 217 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 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 20:49:45,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:45,368 INFO L93 Difference]: Finished difference Result 137 states and 266 transitions. [2021-07-13 20:49:45,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 20:49:45,369 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 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 17 [2021-07-13 20:49:45,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:45,370 INFO L225 Difference]: With dead ends: 137 [2021-07-13 20:49:45,370 INFO L226 Difference]: Without dead ends: 137 [2021-07-13 20:49:45,370 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 25.3ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:49:45,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-07-13 20:49:45,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 100. [2021-07-13 20:49:45,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.1313131313131315) internal successors, (211), 99 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:45,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 211 transitions. [2021-07-13 20:49:45,375 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 211 transitions. Word has length 17 [2021-07-13 20:49:45,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:45,375 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 211 transitions. [2021-07-13 20:49:45,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 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 20:49:45,375 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 211 transitions. [2021-07-13 20:49:45,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 20:49:45,376 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:45,376 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:45,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:45,600 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:45,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:45,600 INFO L82 PathProgramCache]: Analyzing trace with hash 397922747, now seen corresponding path program 5 times [2021-07-13 20:49:45,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:45,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750667664] [2021-07-13 20:49:45,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:45,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:45,624 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:45,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:45,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750667664] [2021-07-13 20:49:45,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750667664] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:45,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980497372] [2021-07-13 20:49:45,625 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 20:49:45,660 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:49:45,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:45,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 20:49:45,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:45,691 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:45,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980497372] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:45,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:45,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-07-13 20:49:45,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613579720] [2021-07-13 20:49:45,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 20:49:45,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:45,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 20:49:45,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:49:45,693 INFO L87 Difference]: Start difference. First operand 100 states and 211 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 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 20:49:45,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:45,739 INFO L93 Difference]: Finished difference Result 126 states and 250 transitions. [2021-07-13 20:49:45,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 20:49:45,740 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 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 17 [2021-07-13 20:49:45,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:45,740 INFO L225 Difference]: With dead ends: 126 [2021-07-13 20:49:45,741 INFO L226 Difference]: Without dead ends: 124 [2021-07-13 20:49:45,741 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 18.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:49:45,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-07-13 20:49:45,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 100. [2021-07-13 20:49:45,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.111111111111111) internal successors, (209), 99 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:45,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 209 transitions. [2021-07-13 20:49:45,745 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 209 transitions. Word has length 17 [2021-07-13 20:49:45,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:45,745 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 209 transitions. [2021-07-13 20:49:45,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 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 20:49:45,745 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 209 transitions. [2021-07-13 20:49:45,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 20:49:45,746 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:45,746 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:45,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:45,957 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:45,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:45,957 INFO L82 PathProgramCache]: Analyzing trace with hash 613173649, now seen corresponding path program 6 times [2021-07-13 20:49:45,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:45,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373353348] [2021-07-13 20:49:45,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:45,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:45,985 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:49:45,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:45,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373353348] [2021-07-13 20:49:45,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373353348] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:45,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8873427] [2021-07-13 20:49:45,986 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 20:49:46,009 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:49:46,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:46,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 20:49:46,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:46,055 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:49:46,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8873427] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:46,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:46,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-07-13 20:49:46,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645295486] [2021-07-13 20:49:46,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 20:49:46,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:46,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 20:49:46,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:49:46,057 INFO L87 Difference]: Start difference. First operand 100 states and 209 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 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 20:49:46,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:46,109 INFO L93 Difference]: Finished difference Result 174 states and 339 transitions. [2021-07-13 20:49:46,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 20:49:46,110 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 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 17 [2021-07-13 20:49:46,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:46,111 INFO L225 Difference]: With dead ends: 174 [2021-07-13 20:49:46,111 INFO L226 Difference]: Without dead ends: 174 [2021-07-13 20:49:46,111 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 20.3ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:49:46,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-07-13 20:49:46,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 109. [2021-07-13 20:49:46,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.1666666666666665) internal successors, (234), 108 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:46,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 234 transitions. [2021-07-13 20:49:46,116 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 234 transitions. Word has length 17 [2021-07-13 20:49:46,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:46,116 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 234 transitions. [2021-07-13 20:49:46,116 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 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 20:49:46,116 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 234 transitions. [2021-07-13 20:49:46,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 20:49:46,117 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:46,117 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:46,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:46,333 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:46,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:46,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1315978957, now seen corresponding path program 7 times [2021-07-13 20:49:46,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:46,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856417751] [2021-07-13 20:49:46,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:46,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:46,356 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:49:46,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:46,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856417751] [2021-07-13 20:49:46,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856417751] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:46,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761683062] [2021-07-13 20:49:46,357 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 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 20:49:46,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:46,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 20:49:46,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:46,411 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:49:46,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761683062] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:46,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:46,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-07-13 20:49:46,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077611358] [2021-07-13 20:49:46,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 20:49:46,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:46,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 20:49:46,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:49:46,413 INFO L87 Difference]: Start difference. First operand 109 states and 234 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 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 20:49:46,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:46,467 INFO L93 Difference]: Finished difference Result 155 states and 313 transitions. [2021-07-13 20:49:46,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 20:49:46,467 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 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 17 [2021-07-13 20:49:46,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:46,470 INFO L225 Difference]: With dead ends: 155 [2021-07-13 20:49:46,470 INFO L226 Difference]: Without dead ends: 152 [2021-07-13 20:49:46,471 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 18.6ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:49:46,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-07-13 20:49:46,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 115. [2021-07-13 20:49:46,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.2280701754385963) internal successors, (254), 114 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:46,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 254 transitions. [2021-07-13 20:49:46,477 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 254 transitions. Word has length 17 [2021-07-13 20:49:46,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:46,477 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 254 transitions. [2021-07-13 20:49:46,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 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 20:49:46,477 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 254 transitions. [2021-07-13 20:49:46,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 20:49:46,479 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:46,479 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:46,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-07-13 20:49:46,693 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:46,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:46,694 INFO L82 PathProgramCache]: Analyzing trace with hash 51051097, now seen corresponding path program 8 times [2021-07-13 20:49:46,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:46,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102629325] [2021-07-13 20:49:46,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:46,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:46,724 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:49:46,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:46,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102629325] [2021-07-13 20:49:46,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102629325] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:46,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829328858] [2021-07-13 20:49:46,725 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 20:49:46,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:49:46,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:46,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 20:49:46,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:46,837 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:49:46,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829328858] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:46,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:46,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-07-13 20:49:46,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870147679] [2021-07-13 20:49:46,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 20:49:46,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:46,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 20:49:46,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:49:46,839 INFO L87 Difference]: Start difference. First operand 115 states and 254 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 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 20:49:46,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:46,887 INFO L93 Difference]: Finished difference Result 160 states and 326 transitions. [2021-07-13 20:49:46,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 20:49:46,887 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 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 17 [2021-07-13 20:49:46,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:46,888 INFO L225 Difference]: With dead ends: 160 [2021-07-13 20:49:46,888 INFO L226 Difference]: Without dead ends: 160 [2021-07-13 20:49:46,888 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 22.0ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:49:46,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-07-13 20:49:46,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 117. [2021-07-13 20:49:46,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.2241379310344827) internal successors, (258), 116 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:46,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 258 transitions. [2021-07-13 20:49:46,893 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 258 transitions. Word has length 17 [2021-07-13 20:49:46,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:46,894 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 258 transitions. [2021-07-13 20:49:46,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 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 20:49:46,894 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 258 transitions. [2021-07-13 20:49:46,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 20:49:46,894 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:46,894 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:47,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:47,116 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:47,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:47,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1332846985, now seen corresponding path program 9 times [2021-07-13 20:49:47,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:47,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737232202] [2021-07-13 20:49:47,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:47,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:47,139 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:49:47,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:47,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737232202] [2021-07-13 20:49:47,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737232202] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:47,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147025073] [2021-07-13 20:49:47,140 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 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 20:49:47,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:49:47,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:47,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 20:49:47,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:47,204 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:49:47,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147025073] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:47,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:47,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-07-13 20:49:47,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621615452] [2021-07-13 20:49:47,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 20:49:47,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:47,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 20:49:47,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:49:47,205 INFO L87 Difference]: Start difference. First operand 117 states and 258 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 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 20:49:47,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:47,257 INFO L93 Difference]: Finished difference Result 170 states and 342 transitions. [2021-07-13 20:49:47,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 20:49:47,257 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 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 17 [2021-07-13 20:49:47,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:47,260 INFO L225 Difference]: With dead ends: 170 [2021-07-13 20:49:47,260 INFO L226 Difference]: Without dead ends: 168 [2021-07-13 20:49:47,260 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 17.8ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:49:47,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-07-13 20:49:47,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 119. [2021-07-13 20:49:47,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.2033898305084745) internal successors, (260), 118 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:47,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 260 transitions. [2021-07-13 20:49:47,266 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 260 transitions. Word has length 17 [2021-07-13 20:49:47,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:47,266 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 260 transitions. [2021-07-13 20:49:47,266 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 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 20:49:47,266 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 260 transitions. [2021-07-13 20:49:47,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 20:49:47,267 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:47,267 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:47,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:47,481 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:47,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:47,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1145142685, now seen corresponding path program 10 times [2021-07-13 20:49:47,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:47,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409113066] [2021-07-13 20:49:47,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:47,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:47,509 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:47,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:47,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409113066] [2021-07-13 20:49:47,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409113066] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:47,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234767828] [2021-07-13 20:49:47,509 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 20:49:47,551 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:49:47,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:47,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 20:49:47,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:47,593 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:47,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234767828] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:47,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:47,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-13 20:49:47,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089011398] [2021-07-13 20:49:47,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 20:49:47,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:47,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 20:49:47,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:49:47,595 INFO L87 Difference]: Start difference. First operand 119 states and 260 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 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 20:49:47,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:47,663 INFO L93 Difference]: Finished difference Result 152 states and 307 transitions. [2021-07-13 20:49:47,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:49:47,664 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 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 17 [2021-07-13 20:49:47,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:47,665 INFO L225 Difference]: With dead ends: 152 [2021-07-13 20:49:47,665 INFO L226 Difference]: Without dead ends: 152 [2021-07-13 20:49:47,665 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 35.7ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:49:47,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-07-13 20:49:47,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 116. [2021-07-13 20:49:47,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.1739130434782608) internal successors, (250), 115 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:47,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 250 transitions. [2021-07-13 20:49:47,669 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 250 transitions. Word has length 17 [2021-07-13 20:49:47,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:47,669 INFO L482 AbstractCegarLoop]: Abstraction has 116 states and 250 transitions. [2021-07-13 20:49:47,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 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 20:49:47,669 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 250 transitions. [2021-07-13 20:49:47,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 20:49:47,669 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:47,670 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:47,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-07-13 20:49:47,885 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:47,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:47,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1839193251, now seen corresponding path program 11 times [2021-07-13 20:49:47,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:47,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434484217] [2021-07-13 20:49:47,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:47,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:47,911 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:47,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:47,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434484217] [2021-07-13 20:49:47,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434484217] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:47,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161133026] [2021-07-13 20:49:47,912 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 20:49:47,949 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:49:47,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:47,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 20:49:47,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:47,983 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:47,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161133026] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:47,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:47,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-13 20:49:47,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504026430] [2021-07-13 20:49:47,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 20:49:47,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:47,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 20:49:47,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:49:47,985 INFO L87 Difference]: Start difference. First operand 116 states and 250 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 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 20:49:48,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:48,044 INFO L93 Difference]: Finished difference Result 167 states and 329 transitions. [2021-07-13 20:49:48,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:49:48,045 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 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 17 [2021-07-13 20:49:48,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:48,045 INFO L225 Difference]: With dead ends: 167 [2021-07-13 20:49:48,045 INFO L226 Difference]: Without dead ends: 161 [2021-07-13 20:49:48,046 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 29.8ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:49:48,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-07-13 20:49:48,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 120. [2021-07-13 20:49:48,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.1512605042016806) internal successors, (256), 119 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:48,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 256 transitions. [2021-07-13 20:49:48,050 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 256 transitions. Word has length 17 [2021-07-13 20:49:48,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:48,051 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 256 transitions. [2021-07-13 20:49:48,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 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 20:49:48,052 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 256 transitions. [2021-07-13 20:49:48,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 20:49:48,055 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:48,055 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:48,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-07-13 20:49:48,261 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:48,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:48,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1030416975, now seen corresponding path program 12 times [2021-07-13 20:49:48,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:48,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589944374] [2021-07-13 20:49:48,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:48,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:48,325 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:48,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:48,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589944374] [2021-07-13 20:49:48,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589944374] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:48,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115399618] [2021-07-13 20:49:48,326 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 20:49:48,353 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:49:48,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:48,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 20:49:48,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:48,427 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:48,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115399618] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:48,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:48,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4] total 10 [2021-07-13 20:49:48,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677180275] [2021-07-13 20:49:48,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:49:48,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:48,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:49:48,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:49:48,429 INFO L87 Difference]: Start difference. First operand 120 states and 256 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:48,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:48,643 INFO L93 Difference]: Finished difference Result 303 states and 601 transitions. [2021-07-13 20:49:48,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:49:48,644 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 20:49:48,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:48,645 INFO L225 Difference]: With dead ends: 303 [2021-07-13 20:49:48,645 INFO L226 Difference]: Without dead ends: 296 [2021-07-13 20:49:48,645 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 146.9ms TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:49:48,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-07-13 20:49:48,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 151. [2021-07-13 20:49:48,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.2533333333333334) internal successors, (338), 150 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:48,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 338 transitions. [2021-07-13 20:49:48,651 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 338 transitions. Word has length 19 [2021-07-13 20:49:48,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:48,651 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 338 transitions. [2021-07-13 20:49:48,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:48,651 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 338 transitions. [2021-07-13 20:49:48,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 20:49:48,652 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:48,652 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:48,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-07-13 20:49:48,861 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:48,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:48,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1048750001, now seen corresponding path program 13 times [2021-07-13 20:49:48,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:48,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764788814] [2021-07-13 20:49:48,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:48,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:48,930 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:48,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:48,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764788814] [2021-07-13 20:49:48,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764788814] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:48,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421404733] [2021-07-13 20:49:48,930 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 20:49:48,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:48,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 20:49:48,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:49,005 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:49:49,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421404733] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:49,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:49,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 8 [2021-07-13 20:49:49,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916348924] [2021-07-13 20:49:49,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 20:49:49,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:49,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 20:49:49,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:49:49,007 INFO L87 Difference]: Start difference. First operand 151 states and 338 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:49,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:49,202 INFO L93 Difference]: Finished difference Result 285 states and 591 transitions. [2021-07-13 20:49:49,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 20:49:49,202 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 20:49:49,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:49,203 INFO L225 Difference]: With dead ends: 285 [2021-07-13 20:49:49,204 INFO L226 Difference]: Without dead ends: 275 [2021-07-13 20:49:49,204 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 144.9ms TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:49:49,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-07-13 20:49:49,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 186. [2021-07-13 20:49:49,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.264864864864865) internal successors, (419), 185 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:49,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 419 transitions. [2021-07-13 20:49:49,211 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 419 transitions. Word has length 19 [2021-07-13 20:49:49,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:49,212 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 419 transitions. [2021-07-13 20:49:49,212 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:49,212 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 419 transitions. [2021-07-13 20:49:49,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 20:49:49,212 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:49,213 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:49,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:49,429 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:49,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:49,429 INFO L82 PathProgramCache]: Analyzing trace with hash -588981681, now seen corresponding path program 14 times [2021-07-13 20:49:49,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:49,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040850693] [2021-07-13 20:49:49,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:49,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:49,510 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:49,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:49,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040850693] [2021-07-13 20:49:49,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040850693] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:49,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792685564] [2021-07-13 20:49:49,511 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 20:49:49,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:49:49,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:49,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 20:49:49,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:49,611 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:49:49,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792685564] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:49,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:49,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4] total 10 [2021-07-13 20:49:49,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086012983] [2021-07-13 20:49:49,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:49:49,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:49,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:49:49,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:49:49,612 INFO L87 Difference]: Start difference. First operand 186 states and 419 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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 20:49:49,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:49,801 INFO L93 Difference]: Finished difference Result 359 states and 743 transitions. [2021-07-13 20:49:49,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:49:49,801 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 20:49:49,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:49,803 INFO L225 Difference]: With dead ends: 359 [2021-07-13 20:49:49,803 INFO L226 Difference]: Without dead ends: 352 [2021-07-13 20:49:49,803 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 142.5ms TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:49:49,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-07-13 20:49:49,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 212. [2021-07-13 20:49:49,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.3175355450236967) internal successors, (489), 211 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:49,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 489 transitions. [2021-07-13 20:49:49,810 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 489 transitions. Word has length 19 [2021-07-13 20:49:49,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:49,810 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 489 transitions. [2021-07-13 20:49:49,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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 20:49:49,811 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 489 transitions. [2021-07-13 20:49:49,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 20:49:49,811 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:49,811 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:50,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:50,029 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:50,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:50,029 INFO L82 PathProgramCache]: Analyzing trace with hash -617233839, now seen corresponding path program 15 times [2021-07-13 20:49:50,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:50,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133167003] [2021-07-13 20:49:50,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:50,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:50,075 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:50,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:50,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133167003] [2021-07-13 20:49:50,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133167003] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:50,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038605000] [2021-07-13 20:49:50,076 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 20:49:50,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:49:50,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:50,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:49:50,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:50,213 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 20:49:50,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038605000] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:50,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:50,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-07-13 20:49:50,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131471346] [2021-07-13 20:49:50,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:49:50,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:50,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:49:50,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:49:50,215 INFO L87 Difference]: Start difference. First operand 212 states and 489 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:50,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:50,547 INFO L93 Difference]: Finished difference Result 389 states and 854 transitions. [2021-07-13 20:49:50,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:49:50,548 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have 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 20:49:50,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:50,549 INFO L225 Difference]: With dead ends: 389 [2021-07-13 20:49:50,549 INFO L226 Difference]: Without dead ends: 317 [2021-07-13 20:49:50,550 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 269.5ms TimeCoverageRelationStatistics Valid=232, Invalid=580, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:49:50,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-07-13 20:49:50,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 221. [2021-07-13 20:49:50,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.3181818181818183) internal successors, (510), 220 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:50,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 510 transitions. [2021-07-13 20:49:50,556 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 510 transitions. Word has length 21 [2021-07-13 20:49:50,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:50,557 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 510 transitions. [2021-07-13 20:49:50,557 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:50,557 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 510 transitions. [2021-07-13 20:49:50,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 20:49:50,557 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:50,558 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:50,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:50,779 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:50,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:50,779 INFO L82 PathProgramCache]: Analyzing trace with hash -380162493, now seen corresponding path program 16 times [2021-07-13 20:49:50,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:50,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954090939] [2021-07-13 20:49:50,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:50,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:50,802 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:50,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:50,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954090939] [2021-07-13 20:49:50,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954090939] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:50,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959357003] [2021-07-13 20:49:50,802 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 20:49:50,820 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:49:50,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:50,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:49:50,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:50,875 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:50,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959357003] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:50,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:50,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-13 20:49:50,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356731497] [2021-07-13 20:49:50,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 20:49:50,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:50,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 20:49:50,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:49:50,877 INFO L87 Difference]: Start difference. First operand 221 states and 510 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 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 20:49:50,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:50,947 INFO L93 Difference]: Finished difference Result 361 states and 777 transitions. [2021-07-13 20:49:50,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 20:49:50,948 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 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 21 [2021-07-13 20:49:50,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:50,949 INFO L225 Difference]: With dead ends: 361 [2021-07-13 20:49:50,950 INFO L226 Difference]: Without dead ends: 361 [2021-07-13 20:49:50,950 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 29.6ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:49:50,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-07-13 20:49:50,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 258. [2021-07-13 20:49:50,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.3463035019455254) internal successors, (603), 257 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:50,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 603 transitions. [2021-07-13 20:49:50,957 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 603 transitions. Word has length 21 [2021-07-13 20:49:50,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:50,957 INFO L482 AbstractCegarLoop]: Abstraction has 258 states and 603 transitions. [2021-07-13 20:49:50,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 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 20:49:50,957 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 603 transitions. [2021-07-13 20:49:50,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 20:49:50,959 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:50,959 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:51,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-07-13 20:49:51,173 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:51,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:51,173 INFO L82 PathProgramCache]: Analyzing trace with hash 492603451, now seen corresponding path program 17 times [2021-07-13 20:49:51,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:51,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966763472] [2021-07-13 20:49:51,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:51,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:51,198 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:49:51,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:51,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966763472] [2021-07-13 20:49:51,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966763472] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:51,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007348251] [2021-07-13 20:49:51,199 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 20:49:51,238 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:49:51,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:51,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:49:51,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:51,283 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:49:51,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007348251] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:51,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:51,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-13 20:49:51,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987922532] [2021-07-13 20:49:51,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 20:49:51,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:51,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 20:49:51,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:49:51,285 INFO L87 Difference]: Start difference. First operand 258 states and 603 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 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 20:49:51,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:51,354 INFO L93 Difference]: Finished difference Result 377 states and 812 transitions. [2021-07-13 20:49:51,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 20:49:51,354 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 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 21 [2021-07-13 20:49:51,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:51,356 INFO L225 Difference]: With dead ends: 377 [2021-07-13 20:49:51,356 INFO L226 Difference]: Without dead ends: 377 [2021-07-13 20:49:51,358 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 33.2ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:49:51,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-07-13 20:49:51,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 280. [2021-07-13 20:49:51,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.3405017921146953) internal successors, (653), 279 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:51,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 653 transitions. [2021-07-13 20:49:51,368 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 653 transitions. Word has length 21 [2021-07-13 20:49:51,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:51,368 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 653 transitions. [2021-07-13 20:49:51,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 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 20:49:51,368 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 653 transitions. [2021-07-13 20:49:51,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 20:49:51,369 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:51,369 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:51,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-07-13 20:49:51,592 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:51,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:51,592 INFO L82 PathProgramCache]: Analyzing trace with hash -2103486153, now seen corresponding path program 18 times [2021-07-13 20:49:51,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:51,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857664401] [2021-07-13 20:49:51,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:51,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:51,626 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:49:51,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:51,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857664401] [2021-07-13 20:49:51,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857664401] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:51,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553748008] [2021-07-13 20:49:51,627 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 20:49:51,652 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 20:49:51,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:51,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:49:51,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:51,688 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:49:51,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553748008] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:51,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:51,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-13 20:49:51,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557797438] [2021-07-13 20:49:51,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 20:49:51,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:51,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 20:49:51,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:49:51,689 INFO L87 Difference]: Start difference. First operand 280 states and 653 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 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 20:49:51,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:51,762 INFO L93 Difference]: Finished difference Result 352 states and 762 transitions. [2021-07-13 20:49:51,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 20:49:51,763 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 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 21 [2021-07-13 20:49:51,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:51,764 INFO L225 Difference]: With dead ends: 352 [2021-07-13 20:49:51,765 INFO L226 Difference]: Without dead ends: 348 [2021-07-13 20:49:51,765 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 28.1ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:49:51,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-07-13 20:49:51,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 244. [2021-07-13 20:49:51,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 2.325102880658436) internal successors, (565), 243 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:51,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 565 transitions. [2021-07-13 20:49:51,771 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 565 transitions. Word has length 21 [2021-07-13 20:49:51,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:51,771 INFO L482 AbstractCegarLoop]: Abstraction has 244 states and 565 transitions. [2021-07-13 20:49:51,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 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 20:49:51,772 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 565 transitions. [2021-07-13 20:49:51,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 20:49:51,772 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:51,772 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:51,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-07-13 20:49:51,989 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:51,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:51,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1685134877, now seen corresponding path program 19 times [2021-07-13 20:49:51,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:51,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197544428] [2021-07-13 20:49:51,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:51,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:52,015 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:52,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:52,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197544428] [2021-07-13 20:49:52,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197544428] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:52,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574819416] [2021-07-13 20:49:52,016 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 20:49:52,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:52,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:49:52,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:52,090 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:52,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574819416] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:52,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:52,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-07-13 20:49:52,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393734990] [2021-07-13 20:49:52,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 20:49:52,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:52,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 20:49:52,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:49:52,091 INFO L87 Difference]: Start difference. First operand 244 states and 565 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 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 20:49:52,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:52,174 INFO L93 Difference]: Finished difference Result 304 states and 656 transitions. [2021-07-13 20:49:52,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 20:49:52,174 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 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 21 [2021-07-13 20:49:52,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:52,176 INFO L225 Difference]: With dead ends: 304 [2021-07-13 20:49:52,176 INFO L226 Difference]: Without dead ends: 298 [2021-07-13 20:49:52,176 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 38.4ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:49:52,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-07-13 20:49:52,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 246. [2021-07-13 20:49:52,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.3102040816326532) internal successors, (566), 245 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:52,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 566 transitions. [2021-07-13 20:49:52,182 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 566 transitions. Word has length 21 [2021-07-13 20:49:52,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:52,182 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 566 transitions. [2021-07-13 20:49:52,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 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 20:49:52,182 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 566 transitions. [2021-07-13 20:49:52,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 20:49:52,183 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:52,183 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:52,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-07-13 20:49:52,406 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:52,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:52,406 INFO L82 PathProgramCache]: Analyzing trace with hash 540638335, now seen corresponding path program 20 times [2021-07-13 20:49:52,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:52,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394511696] [2021-07-13 20:49:52,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:52,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:52,432 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:49:52,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:52,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394511696] [2021-07-13 20:49:52,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394511696] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:52,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903960383] [2021-07-13 20:49:52,433 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 20:49:52,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:49:52,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:52,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:49:52,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:52,528 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:49:52,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903960383] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:52,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:52,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-07-13 20:49:52,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687547547] [2021-07-13 20:49:52,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 20:49:52,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:52,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 20:49:52,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:49:52,530 INFO L87 Difference]: Start difference. First operand 246 states and 566 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 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 20:49:52,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:52,609 INFO L93 Difference]: Finished difference Result 309 states and 671 transitions. [2021-07-13 20:49:52,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 20:49:52,609 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 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 21 [2021-07-13 20:49:52,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:52,611 INFO L225 Difference]: With dead ends: 309 [2021-07-13 20:49:52,611 INFO L226 Difference]: Without dead ends: 309 [2021-07-13 20:49:52,611 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 41.7ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:49:52,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-07-13 20:49:52,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 248. [2021-07-13 20:49:52,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.3076923076923075) internal successors, (570), 247 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:52,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 570 transitions. [2021-07-13 20:49:52,624 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 570 transitions. Word has length 21 [2021-07-13 20:49:52,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:52,624 INFO L482 AbstractCegarLoop]: Abstraction has 248 states and 570 transitions. [2021-07-13 20:49:52,624 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 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 20:49:52,624 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 570 transitions. [2021-07-13 20:49:52,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 20:49:52,625 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:52,625 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:52,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-07-13 20:49:52,849 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:52,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:52,849 INFO L82 PathProgramCache]: Analyzing trace with hash -51672517, now seen corresponding path program 21 times [2021-07-13 20:49:52,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:52,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866272828] [2021-07-13 20:49:52,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:52,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:52,872 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:49:52,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:52,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866272828] [2021-07-13 20:49:52,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866272828] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:52,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481155673] [2021-07-13 20:49:52,872 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 20:49:52,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:49:52,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:52,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:49:52,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:52,995 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:49:52,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481155673] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:49:52,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-13 20:49:52,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5] total 11 [2021-07-13 20:49:52,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517222822] [2021-07-13 20:49:52,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:49:52,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:52,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:49:52,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:49:52,996 INFO L87 Difference]: Start difference. First operand 248 states and 570 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 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 20:49:53,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:53,097 INFO L93 Difference]: Finished difference Result 382 states and 824 transitions. [2021-07-13 20:49:53,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 20:49:53,097 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 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 21 [2021-07-13 20:49:53,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:53,098 INFO L225 Difference]: With dead ends: 382 [2021-07-13 20:49:53,098 INFO L226 Difference]: Without dead ends: 232 [2021-07-13 20:49:53,098 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 91.3ms TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:49:53,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-07-13 20:49:53,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 175. [2021-07-13 20:49:53,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.7758620689655173) internal successors, (309), 174 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:53,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 309 transitions. [2021-07-13 20:49:53,102 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 309 transitions. Word has length 21 [2021-07-13 20:49:53,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:53,103 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 309 transitions. [2021-07-13 20:49:53,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 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 20:49:53,104 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 309 transitions. [2021-07-13 20:49:53,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 20:49:53,104 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:53,104 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:53,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:53,317 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:53,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:53,318 INFO L82 PathProgramCache]: Analyzing trace with hash -2113872589, now seen corresponding path program 22 times [2021-07-13 20:49:53,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:53,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489885750] [2021-07-13 20:49:53,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:53,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:53,343 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:49:53,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:53,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489885750] [2021-07-13 20:49:53,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489885750] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:53,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871068100] [2021-07-13 20:49:53,344 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 20:49:53,365 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:49:53,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:53,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:49:53,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:53,403 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:49:53,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871068100] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:53,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:53,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-07-13 20:49:53,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330187126] [2021-07-13 20:49:53,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 20:49:53,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:53,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 20:49:53,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:49:53,404 INFO L87 Difference]: Start difference. First operand 175 states and 309 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 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 20:49:53,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:53,486 INFO L93 Difference]: Finished difference Result 268 states and 454 transitions. [2021-07-13 20:49:53,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 20:49:53,487 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 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 21 [2021-07-13 20:49:53,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:53,488 INFO L225 Difference]: With dead ends: 268 [2021-07-13 20:49:53,488 INFO L226 Difference]: Without dead ends: 262 [2021-07-13 20:49:53,488 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 38.3ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:49:53,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-07-13 20:49:53,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 176. [2021-07-13 20:49:53,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.782857142857143) internal successors, (312), 175 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:53,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 312 transitions. [2021-07-13 20:49:53,492 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 312 transitions. Word has length 21 [2021-07-13 20:49:53,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:53,492 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 312 transitions. [2021-07-13 20:49:53,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 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 20:49:53,493 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 312 transitions. [2021-07-13 20:49:53,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 20:49:53,493 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:53,493 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:53,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-07-13 20:49:53,715 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:53,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:53,715 INFO L82 PathProgramCache]: Analyzing trace with hash 913637529, now seen corresponding path program 23 times [2021-07-13 20:49:53,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:53,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484665616] [2021-07-13 20:49:53,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:53,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:53,747 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:53,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:53,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484665616] [2021-07-13 20:49:53,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484665616] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:53,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836897559] [2021-07-13 20:49:53,748 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 20:49:53,770 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:49:53,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:53,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:49:53,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:53,807 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:53,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836897559] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:53,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:53,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-13 20:49:53,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714759066] [2021-07-13 20:49:53,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:49:53,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:53,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:49:53,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:49:53,808 INFO L87 Difference]: Start difference. First operand 176 states and 312 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 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 20:49:53,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:53,899 INFO L93 Difference]: Finished difference Result 257 states and 435 transitions. [2021-07-13 20:49:53,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 20:49:53,900 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 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 21 [2021-07-13 20:49:53,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:53,901 INFO L225 Difference]: With dead ends: 257 [2021-07-13 20:49:53,901 INFO L226 Difference]: Without dead ends: 247 [2021-07-13 20:49:53,901 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 51.7ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:49:53,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-07-13 20:49:53,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 179. [2021-07-13 20:49:53,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 1.7640449438202248) internal successors, (314), 178 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:53,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 314 transitions. [2021-07-13 20:49:53,905 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 314 transitions. Word has length 21 [2021-07-13 20:49:53,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:53,905 INFO L482 AbstractCegarLoop]: Abstraction has 179 states and 314 transitions. [2021-07-13 20:49:53,905 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 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 20:49:53,905 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 314 transitions. [2021-07-13 20:49:53,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 20:49:53,906 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:53,906 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:54,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:54,129 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:54,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:54,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1408084783, now seen corresponding path program 24 times [2021-07-13 20:49:54,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:54,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693711961] [2021-07-13 20:49:54,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:54,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:54,159 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:54,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:54,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693711961] [2021-07-13 20:49:54,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693711961] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:54,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672814983] [2021-07-13 20:49:54,160 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 20:49:54,188 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:49:54,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:54,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:49:54,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:54,220 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:54,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672814983] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:54,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:54,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-07-13 20:49:54,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109822819] [2021-07-13 20:49:54,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 20:49:54,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:54,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 20:49:54,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:49:54,222 INFO L87 Difference]: Start difference. First operand 179 states and 314 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 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 20:49:54,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:54,297 INFO L93 Difference]: Finished difference Result 248 states and 411 transitions. [2021-07-13 20:49:54,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 20:49:54,297 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 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 21 [2021-07-13 20:49:54,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:54,298 INFO L225 Difference]: With dead ends: 248 [2021-07-13 20:49:54,298 INFO L226 Difference]: Without dead ends: 239 [2021-07-13 20:49:54,298 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 36.5ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:49:54,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-07-13 20:49:54,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 191. [2021-07-13 20:49:54,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.7526315789473683) internal successors, (333), 190 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:54,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 333 transitions. [2021-07-13 20:49:54,302 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 333 transitions. Word has length 21 [2021-07-13 20:49:54,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:54,302 INFO L482 AbstractCegarLoop]: Abstraction has 191 states and 333 transitions. [2021-07-13 20:49:54,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 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 20:49:54,303 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 333 transitions. [2021-07-13 20:49:54,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 20:49:54,303 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:54,303 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:54,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-07-13 20:49:54,525 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:54,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:54,526 INFO L82 PathProgramCache]: Analyzing trace with hash 791144921, now seen corresponding path program 25 times [2021-07-13 20:49:54,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:54,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623502280] [2021-07-13 20:49:54,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:54,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:54,551 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:54,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:54,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623502280] [2021-07-13 20:49:54,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623502280] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:54,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430428672] [2021-07-13 20:49:54,551 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 20:49:54,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:54,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:49:54,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:54,607 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:54,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430428672] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:54,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:54,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-13 20:49:54,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350194910] [2021-07-13 20:49:54,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 20:49:54,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:54,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 20:49:54,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:49:54,609 INFO L87 Difference]: Start difference. First operand 191 states and 333 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 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 20:49:54,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:54,662 INFO L93 Difference]: Finished difference Result 270 states and 458 transitions. [2021-07-13 20:49:54,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 20:49:54,662 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 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 21 [2021-07-13 20:49:54,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:54,663 INFO L225 Difference]: With dead ends: 270 [2021-07-13 20:49:54,663 INFO L226 Difference]: Without dead ends: 270 [2021-07-13 20:49:54,665 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 30.0ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:49:54,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-07-13 20:49:54,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 200. [2021-07-13 20:49:54,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 1.7688442211055277) internal successors, (352), 199 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 20:49:54,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 352 transitions. [2021-07-13 20:49:54,669 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 352 transitions. Word has length 21 [2021-07-13 20:49:54,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:54,669 INFO L482 AbstractCegarLoop]: Abstraction has 200 states and 352 transitions. [2021-07-13 20:49:54,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 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 20:49:54,669 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 352 transitions. [2021-07-13 20:49:54,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 20:49:54,670 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:54,670 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:54,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:54,885 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:54,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:54,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1493950229, now seen corresponding path program 26 times [2021-07-13 20:49:54,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:54,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060754363] [2021-07-13 20:49:54,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:54,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:54,908 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:54,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:54,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060754363] [2021-07-13 20:49:54,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060754363] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:54,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470687027] [2021-07-13 20:49:54,909 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 20:49:54,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:49:54,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:54,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:49:54,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:54,970 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:54,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470687027] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:54,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:54,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-13 20:49:54,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483653354] [2021-07-13 20:49:54,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 20:49:54,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:54,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 20:49:54,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:49:54,972 INFO L87 Difference]: Start difference. First operand 200 states and 352 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 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 20:49:55,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:55,036 INFO L93 Difference]: Finished difference Result 240 states and 405 transitions. [2021-07-13 20:49:55,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 20:49:55,036 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 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 21 [2021-07-13 20:49:55,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:55,037 INFO L225 Difference]: With dead ends: 240 [2021-07-13 20:49:55,037 INFO L226 Difference]: Without dead ends: 237 [2021-07-13 20:49:55,038 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 25.3ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:49:55,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-07-13 20:49:55,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 197. [2021-07-13 20:49:55,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.760204081632653) internal successors, (345), 196 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:55,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 345 transitions. [2021-07-13 20:49:55,042 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 345 transitions. Word has length 21 [2021-07-13 20:49:55,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:55,042 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 345 transitions. [2021-07-13 20:49:55,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 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 20:49:55,042 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 345 transitions. [2021-07-13 20:49:55,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 20:49:55,043 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:55,043 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:55,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-07-13 20:49:55,265 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:55,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:55,266 INFO L82 PathProgramCache]: Analyzing trace with hash 229022369, now seen corresponding path program 27 times [2021-07-13 20:49:55,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:55,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674242838] [2021-07-13 20:49:55,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:55,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:55,287 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:49:55,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:55,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674242838] [2021-07-13 20:49:55,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674242838] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:55,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937296745] [2021-07-13 20:49:55,288 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) [2021-07-13 20:49:55,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:49:55,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:55,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:49:55,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:55,401 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:49:55,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937296745] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:49:55,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-13 20:49:55,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5] total 11 [2021-07-13 20:49:55,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567707268] [2021-07-13 20:49:55,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:49:55,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:55,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:49:55,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:49:55,403 INFO L87 Difference]: Start difference. First operand 197 states and 345 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:55,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:55,453 INFO L93 Difference]: Finished difference Result 224 states and 389 transitions. [2021-07-13 20:49:55,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 20:49:55,453 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 20:49:55,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:55,454 INFO L225 Difference]: With dead ends: 224 [2021-07-13 20:49:55,454 INFO L226 Difference]: Without dead ends: 199 [2021-07-13 20:49:55,454 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 64.9ms TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:49:55,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-07-13 20:49:55,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 197. [2021-07-13 20:49:55,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.7091836734693877) internal successors, (335), 196 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:55,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 335 transitions. [2021-07-13 20:49:55,458 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 335 transitions. Word has length 21 [2021-07-13 20:49:55,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:55,458 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 335 transitions. [2021-07-13 20:49:55,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:55,458 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 335 transitions. [2021-07-13 20:49:55,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 20:49:55,458 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:55,459 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:55,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:55,673 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:55,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:55,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1365207641, now seen corresponding path program 28 times [2021-07-13 20:49:55,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:55,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402612937] [2021-07-13 20:49:55,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:55,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:55,696 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:49:55,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:55,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402612937] [2021-07-13 20:49:55,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402612937] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:55,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896759677] [2021-07-13 20:49:55,697 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 20:49:55,747 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:49:55,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:55,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:49:55,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:55,786 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:49:55,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896759677] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:55,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:55,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-13 20:49:55,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500366925] [2021-07-13 20:49:55,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 20:49:55,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:55,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 20:49:55,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:49:55,787 INFO L87 Difference]: Start difference. First operand 197 states and 335 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 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 20:49:55,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:55,859 INFO L93 Difference]: Finished difference Result 234 states and 383 transitions. [2021-07-13 20:49:55,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 20:49:55,860 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 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 21 [2021-07-13 20:49:55,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:55,861 INFO L225 Difference]: With dead ends: 234 [2021-07-13 20:49:55,861 INFO L226 Difference]: Without dead ends: 234 [2021-07-13 20:49:55,862 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 28.9ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:49:55,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-07-13 20:49:55,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 196. [2021-07-13 20:49:55,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 1.6974358974358974) internal successors, (331), 195 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:55,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 331 transitions. [2021-07-13 20:49:55,866 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 331 transitions. Word has length 21 [2021-07-13 20:49:55,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:55,867 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 331 transitions. [2021-07-13 20:49:55,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 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 20:49:55,867 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 331 transitions. [2021-07-13 20:49:55,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:49:55,867 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:55,867 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:56,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-07-13 20:49:56,081 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:56,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:56,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1990008773, now seen corresponding path program 29 times [2021-07-13 20:49:56,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:56,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131098563] [2021-07-13 20:49:56,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:56,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:56,155 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 20:49:56,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:56,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131098563] [2021-07-13 20:49:56,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131098563] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:56,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190300515] [2021-07-13 20:49:56,156 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:49:56,175 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:49:56,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:56,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 20:49:56,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:56,253 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:49:56,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190300515] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:56,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:56,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 13 [2021-07-13 20:49:56,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602186981] [2021-07-13 20:49:56,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:49:56,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:56,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:49:56,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:49:56,255 INFO L87 Difference]: Start difference. First operand 196 states and 331 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:56,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:56,484 INFO L93 Difference]: Finished difference Result 337 states and 533 transitions. [2021-07-13 20:49:56,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:49:56,485 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 20:49:56,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:56,486 INFO L225 Difference]: With dead ends: 337 [2021-07-13 20:49:56,486 INFO L226 Difference]: Without dead ends: 330 [2021-07-13 20:49:56,486 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 183.9ms TimeCoverageRelationStatistics Valid=119, Invalid=261, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:49:56,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-07-13 20:49:56,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 213. [2021-07-13 20:49:56,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 1.7075471698113207) internal successors, (362), 212 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:56,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 362 transitions. [2021-07-13 20:49:56,491 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 362 transitions. Word has length 23 [2021-07-13 20:49:56,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:56,491 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 362 transitions. [2021-07-13 20:49:56,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:56,491 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 362 transitions. [2021-07-13 20:49:56,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:49:56,491 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:56,491 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:56,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:56,715 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:56,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:56,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1910209031, now seen corresponding path program 30 times [2021-07-13 20:49:56,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:56,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85769591] [2021-07-13 20:49:56,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:56,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:56,836 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:56,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:56,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85769591] [2021-07-13 20:49:56,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85769591] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:56,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631830979] [2021-07-13 20:49:56,836 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 20:49:56,869 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:49:56,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:56,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 20:49:56,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:56,924 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:49:56,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631830979] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:56,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:56,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 10 [2021-07-13 20:49:56,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981932753] [2021-07-13 20:49:56,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:49:56,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:56,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:49:56,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:49:56,926 INFO L87 Difference]: Start difference. First operand 213 states and 362 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:57,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:57,117 INFO L93 Difference]: Finished difference Result 390 states and 642 transitions. [2021-07-13 20:49:57,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:49:57,118 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 20:49:57,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:57,119 INFO L225 Difference]: With dead ends: 390 [2021-07-13 20:49:57,119 INFO L226 Difference]: Without dead ends: 383 [2021-07-13 20:49:57,119 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 170.7ms TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:49:57,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-07-13 20:49:57,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 240. [2021-07-13 20:49:57,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 1.7447698744769875) internal successors, (417), 239 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:57,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 417 transitions. [2021-07-13 20:49:57,124 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 417 transitions. Word has length 23 [2021-07-13 20:49:57,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:57,124 INFO L482 AbstractCegarLoop]: Abstraction has 240 states and 417 transitions. [2021-07-13 20:49:57,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:57,124 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 417 transitions. [2021-07-13 20:49:57,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:49:57,125 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:57,125 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:57,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-07-13 20:49:57,341 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:57,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:57,341 INFO L82 PathProgramCache]: Analyzing trace with hash -89900555, now seen corresponding path program 31 times [2021-07-13 20:49:57,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:57,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127007680] [2021-07-13 20:49:57,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:57,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:57,400 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:57,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:57,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127007680] [2021-07-13 20:49:57,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127007680] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:57,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416863790] [2021-07-13 20:49:57,400 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 20:49:57,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:57,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 20:49:57,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:57,528 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:49:57,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416863790] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:57,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:57,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2021-07-13 20:49:57,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002517945] [2021-07-13 20:49:57,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:49:57,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:57,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:49:57,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:49:57,529 INFO L87 Difference]: Start difference. First operand 240 states and 417 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:57,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:57,737 INFO L93 Difference]: Finished difference Result 494 states and 827 transitions. [2021-07-13 20:49:57,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:49:57,737 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 20:49:57,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:57,738 INFO L225 Difference]: With dead ends: 494 [2021-07-13 20:49:57,738 INFO L226 Difference]: Without dead ends: 487 [2021-07-13 20:49:57,738 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 142.5ms TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:49:57,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-07-13 20:49:57,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 281. [2021-07-13 20:49:57,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 1.7535714285714286) internal successors, (491), 280 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:57,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 491 transitions. [2021-07-13 20:49:57,764 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 491 transitions. Word has length 23 [2021-07-13 20:49:57,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:57,764 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 491 transitions. [2021-07-13 20:49:57,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:57,764 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 491 transitions. [2021-07-13 20:49:57,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:49:57,764 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:57,765 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:57,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-07-13 20:49:57,981 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:57,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:57,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1174855409, now seen corresponding path program 32 times [2021-07-13 20:49:57,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:57,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290971579] [2021-07-13 20:49:57,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:57,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:58,081 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:58,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:58,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290971579] [2021-07-13 20:49:58,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290971579] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:58,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264955203] [2021-07-13 20:49:58,082 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 20:49:58,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:49:58,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:58,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 20:49:58,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:58,184 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:49:58,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264955203] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:58,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:58,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 13 [2021-07-13 20:49:58,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331278842] [2021-07-13 20:49:58,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:49:58,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:58,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:49:58,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:49:58,187 INFO L87 Difference]: Start difference. First operand 281 states and 491 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:58,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:58,432 INFO L93 Difference]: Finished difference Result 505 states and 846 transitions. [2021-07-13 20:49:58,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:49:58,432 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 20:49:58,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:58,434 INFO L225 Difference]: With dead ends: 505 [2021-07-13 20:49:58,434 INFO L226 Difference]: Without dead ends: 498 [2021-07-13 20:49:58,435 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 195.9ms TimeCoverageRelationStatistics Valid=119, Invalid=261, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:49:58,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-07-13 20:49:58,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 339. [2021-07-13 20:49:58,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 1.7396449704142012) internal successors, (588), 338 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:58,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 588 transitions. [2021-07-13 20:49:58,441 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 588 transitions. Word has length 23 [2021-07-13 20:49:58,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:58,442 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 588 transitions. [2021-07-13 20:49:58,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:58,442 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 588 transitions. [2021-07-13 20:49:58,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:49:58,442 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:58,443 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:58,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-07-13 20:49:58,661 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:58,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:58,661 INFO L82 PathProgramCache]: Analyzing trace with hash -508289285, now seen corresponding path program 33 times [2021-07-13 20:49:58,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:58,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580705450] [2021-07-13 20:49:58,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:58,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:58,707 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:58,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:58,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580705450] [2021-07-13 20:49:58,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580705450] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:58,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690304233] [2021-07-13 20:49:58,707 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 20:49:58,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:49:58,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:58,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:49:58,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:58,828 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-07-13 20:49:58,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690304233] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:58,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:58,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-07-13 20:49:58,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271835394] [2021-07-13 20:49:58,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:49:58,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:58,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:49:58,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:49:58,830 INFO L87 Difference]: Start difference. First operand 339 states and 588 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:59,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:59,151 INFO L93 Difference]: Finished difference Result 383 states and 645 transitions. [2021-07-13 20:49:59,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:49:59,151 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:49:59,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:59,152 INFO L225 Difference]: With dead ends: 383 [2021-07-13 20:49:59,152 INFO L226 Difference]: Without dead ends: 249 [2021-07-13 20:49:59,152 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 292.5ms TimeCoverageRelationStatistics Valid=247, Invalid=683, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:49:59,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-07-13 20:49:59,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 249. [2021-07-13 20:49:59,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 1.7298387096774193) internal successors, (429), 248 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:59,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 429 transitions. [2021-07-13 20:49:59,159 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 429 transitions. Word has length 25 [2021-07-13 20:49:59,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:59,159 INFO L482 AbstractCegarLoop]: Abstraction has 249 states and 429 transitions. [2021-07-13 20:49:59,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:59,160 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 429 transitions. [2021-07-13 20:49:59,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:49:59,160 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:59,161 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:59,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-07-13 20:49:59,373 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:59,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:59,374 INFO L82 PathProgramCache]: Analyzing trace with hash -2072797355, now seen corresponding path program 34 times [2021-07-13 20:49:59,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:59,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066788126] [2021-07-13 20:49:59,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:59,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:59,411 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:59,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:59,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066788126] [2021-07-13 20:49:59,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066788126] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:59,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139045272] [2021-07-13 20:49:59,411 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 20:49:59,434 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:49:59,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:59,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:49:59,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:59,479 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:59,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139045272] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:59,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:59,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-13 20:49:59,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172439520] [2021-07-13 20:49:59,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 20:49:59,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:59,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 20:49:59,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:49:59,480 INFO L87 Difference]: Start difference. First operand 249 states and 429 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 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 20:49:59,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:59,583 INFO L93 Difference]: Finished difference Result 352 states and 595 transitions. [2021-07-13 20:49:59,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 20:49:59,583 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:49:59,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:59,585 INFO L225 Difference]: With dead ends: 352 [2021-07-13 20:49:59,585 INFO L226 Difference]: Without dead ends: 352 [2021-07-13 20:49:59,585 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 66.3ms TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:49:59,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-07-13 20:49:59,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 234. [2021-07-13 20:49:59,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 1.7124463519313304) internal successors, (399), 233 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:59,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 399 transitions. [2021-07-13 20:49:59,589 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 399 transitions. Word has length 25 [2021-07-13 20:49:59,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:59,589 INFO L482 AbstractCegarLoop]: Abstraction has 234 states and 399 transitions. [2021-07-13 20:49:59,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 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 20:49:59,589 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 399 transitions. [2021-07-13 20:49:59,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:49:59,590 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:59,590 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:59,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-07-13 20:49:59,814 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:59,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:59,814 INFO L82 PathProgramCache]: Analyzing trace with hash -2069719407, now seen corresponding path program 35 times [2021-07-13 20:49:59,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:59,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866723080] [2021-07-13 20:49:59,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:59,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:59,854 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:59,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:59,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866723080] [2021-07-13 20:49:59,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866723080] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:59,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797571073] [2021-07-13 20:49:59,855 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 20:49:59,878 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 20:49:59,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:59,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:49:59,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:59,916 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:59,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797571073] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:59,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:59,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-13 20:49:59,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070788441] [2021-07-13 20:49:59,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 20:49:59,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:59,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 20:49:59,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:49:59,918 INFO L87 Difference]: Start difference. First operand 234 states and 399 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 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 20:49:59,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:50:00,000 INFO L93 Difference]: Finished difference Result 338 states and 551 transitions. [2021-07-13 20:50:00,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:50:00,000 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:50:00,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:50:00,003 INFO L225 Difference]: With dead ends: 338 [2021-07-13 20:50:00,003 INFO L226 Difference]: Without dead ends: 323 [2021-07-13 20:50:00,003 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 56.9ms TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:50:00,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-07-13 20:50:00,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 241. [2021-07-13 20:50:00,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 1.7041666666666666) internal successors, (409), 240 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:00,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 409 transitions. [2021-07-13 20:50:00,007 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 409 transitions. Word has length 25 [2021-07-13 20:50:00,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:50:00,007 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 409 transitions. [2021-07-13 20:50:00,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 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 20:50:00,007 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 409 transitions. [2021-07-13 20:50:00,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:50:00,008 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:50:00,008 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:50:00,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-07-13 20:50:00,221 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:50:00,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:50:00,221 INFO L82 PathProgramCache]: Analyzing trace with hash 417917337, now seen corresponding path program 36 times [2021-07-13 20:50:00,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:50:00,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003150651] [2021-07-13 20:50:00,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:50:00,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:50:00,255 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:50:00,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:50:00,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003150651] [2021-07-13 20:50:00,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003150651] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:00,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554119927] [2021-07-13 20:50:00,255 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 20:50:00,274 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 20:50:00,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:50:00,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:50:00,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:50:00,330 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:50:00,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554119927] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:00,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:50:00,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-13 20:50:00,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254334568] [2021-07-13 20:50:00,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:50:00,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:50:00,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:50:00,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:50:00,331 INFO L87 Difference]: Start difference. First operand 241 states and 409 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 20:50:00,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:50:00,399 INFO L93 Difference]: Finished difference Result 346 states and 575 transitions. [2021-07-13 20:50:00,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 20:50:00,400 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:50:00,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:50:00,401 INFO L225 Difference]: With dead ends: 346 [2021-07-13 20:50:00,401 INFO L226 Difference]: Without dead ends: 346 [2021-07-13 20:50:00,401 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 48.3ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:50:00,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-07-13 20:50:00,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 234. [2021-07-13 20:50:00,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 1.6866952789699572) internal successors, (393), 233 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 20:50:00,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 393 transitions. [2021-07-13 20:50:00,405 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 393 transitions. Word has length 25 [2021-07-13 20:50:00,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:50:00,405 INFO L482 AbstractCegarLoop]: Abstraction has 234 states and 393 transitions. [2021-07-13 20:50:00,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 20:50:00,405 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 393 transitions. [2021-07-13 20:50:00,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:50:00,406 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:50:00,406 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:50:00,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-07-13 20:50:00,621 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:50:00,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:50:00,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1503952853, now seen corresponding path program 37 times [2021-07-13 20:50:00,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:50:00,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598222188] [2021-07-13 20:50:00,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:50:00,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:50:00,650 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:50:00,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:50:00,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598222188] [2021-07-13 20:50:00,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598222188] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:00,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362023684] [2021-07-13 20:50:00,651 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 20:50:00,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:50:00,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:50:00,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:50:00,712 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:50:00,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362023684] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:00,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:50:00,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-13 20:50:00,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32677506] [2021-07-13 20:50:00,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:50:00,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:50:00,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:50:00,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:50:00,713 INFO L87 Difference]: Start difference. First operand 234 states and 393 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 20:50:00,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:50:00,795 INFO L93 Difference]: Finished difference Result 281 states and 454 transitions. [2021-07-13 20:50:00,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 20:50:00,795 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:50:00,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:50:00,796 INFO L225 Difference]: With dead ends: 281 [2021-07-13 20:50:00,796 INFO L226 Difference]: Without dead ends: 272 [2021-07-13 20:50:00,796 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 46.6ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:50:00,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-07-13 20:50:00,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 225. [2021-07-13 20:50:00,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.6741071428571428) internal successors, (375), 224 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:00,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 375 transitions. [2021-07-13 20:50:00,800 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 375 transitions. Word has length 25 [2021-07-13 20:50:00,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:50:00,800 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 375 transitions. [2021-07-13 20:50:00,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 20:50:00,800 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 375 transitions. [2021-07-13 20:50:00,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:50:00,801 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:50:00,801 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:50:01,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:50:01,017 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:50:01,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:50:01,017 INFO L82 PathProgramCache]: Analyzing trace with hash -2087332515, now seen corresponding path program 38 times [2021-07-13 20:50:01,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:50:01,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697840517] [2021-07-13 20:50:01,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:50:01,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:50:01,043 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:50:01,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:50:01,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697840517] [2021-07-13 20:50:01,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697840517] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:01,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063236642] [2021-07-13 20:50:01,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:50:01,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:50:01,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:50:01,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:50:01,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:50:01,106 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:50:01,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063236642] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:01,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:50:01,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-07-13 20:50:01,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867726115] [2021-07-13 20:50:01,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 20:50:01,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:50:01,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 20:50:01,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:50:01,107 INFO L87 Difference]: Start difference. First operand 225 states and 375 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 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 20:50:01,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:50:01,157 INFO L93 Difference]: Finished difference Result 262 states and 421 transitions. [2021-07-13 20:50:01,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 20:50:01,157 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:50:01,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:50:01,158 INFO L225 Difference]: With dead ends: 262 [2021-07-13 20:50:01,158 INFO L226 Difference]: Without dead ends: 262 [2021-07-13 20:50:01,158 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 35.6ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:50:01,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-07-13 20:50:01,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 204. [2021-07-13 20:50:01,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 1.6600985221674878) internal successors, (337), 203 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:01,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 337 transitions. [2021-07-13 20:50:01,161 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 337 transitions. Word has length 25 [2021-07-13 20:50:01,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:50:01,161 INFO L482 AbstractCegarLoop]: Abstraction has 204 states and 337 transitions. [2021-07-13 20:50:01,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 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 20:50:01,162 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 337 transitions. [2021-07-13 20:50:01,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:50:01,162 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:50:01,162 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:50:01,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:50:01,377 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:50:01,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:50:01,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1140061405, now seen corresponding path program 39 times [2021-07-13 20:50:01,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:50:01,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704304470] [2021-07-13 20:50:01,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:50:01,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:50:01,405 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:50:01,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:50:01,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704304470] [2021-07-13 20:50:01,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704304470] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:01,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750349690] [2021-07-13 20:50:01,405 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 20:50:01,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:50:01,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:50:01,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:50:01,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:50:01,503 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-07-13 20:50:01,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750349690] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:50:01,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-13 20:50:01,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [6] total 12 [2021-07-13 20:50:01,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315048346] [2021-07-13 20:50:01,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:50:01,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:50:01,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:50:01,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:50:01,504 INFO L87 Difference]: Start difference. First operand 204 states and 337 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:01,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:50:01,558 INFO L93 Difference]: Finished difference Result 211 states and 345 transitions. [2021-07-13 20:50:01,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 20:50:01,558 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:50:01,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:50:01,558 INFO L225 Difference]: With dead ends: 211 [2021-07-13 20:50:01,558 INFO L226 Difference]: Without dead ends: 39 [2021-07-13 20:50:01,559 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 72.5ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:50:01,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-07-13 20:50:01,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2021-07-13 20:50:01,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.3888888888888888) internal successors, (50), 36 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:01,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 50 transitions. [2021-07-13 20:50:01,559 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 50 transitions. Word has length 25 [2021-07-13 20:50:01,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:50:01,559 INFO L482 AbstractCegarLoop]: Abstraction has 37 states and 50 transitions. [2021-07-13 20:50:01,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:01,559 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 50 transitions. [2021-07-13 20:50:01,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:50:01,560 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:50:01,560 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:50:01,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:50:01,760 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:50:01,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:50:01,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1938530999, now seen corresponding path program 40 times [2021-07-13 20:50:01,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:50:01,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982208622] [2021-07-13 20:50:01,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:50:01,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:50:01,815 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:50:01,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:50:01,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982208622] [2021-07-13 20:50:01,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982208622] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:01,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991643741] [2021-07-13 20:50:01,815 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 20:50:01,836 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:50:01,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:50:01,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:50:01,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:50:01,892 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:50:01,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991643741] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:01,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:50:01,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-13 20:50:01,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594593691] [2021-07-13 20:50:01,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:50:01,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:50:01,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:50:01,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:50:01,893 INFO L87 Difference]: Start difference. First operand 37 states and 50 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 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 20:50:01,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:50:01,947 INFO L93 Difference]: Finished difference Result 54 states and 73 transitions. [2021-07-13 20:50:01,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 20:50:01,947 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:50:01,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:50:01,947 INFO L225 Difference]: With dead ends: 54 [2021-07-13 20:50:01,947 INFO L226 Difference]: Without dead ends: 40 [2021-07-13 20:50:01,948 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 64.9ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:50:01,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-07-13 20:50:01,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-07-13 20:50:01,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.368421052631579) internal successors, (52), 38 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:01,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 52 transitions. [2021-07-13 20:50:01,949 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 52 transitions. Word has length 25 [2021-07-13 20:50:01,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:50:01,949 INFO L482 AbstractCegarLoop]: Abstraction has 39 states and 52 transitions. [2021-07-13 20:50:01,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 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 20:50:01,949 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 52 transitions. [2021-07-13 20:50:01,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:50:01,949 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:50:01,949 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:50:02,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-07-13 20:50:02,165 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:50:02,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:50:02,165 INFO L82 PathProgramCache]: Analyzing trace with hash 979739577, now seen corresponding path program 41 times [2021-07-13 20:50:02,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:50:02,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470924994] [2021-07-13 20:50:02,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:50:02,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:50:02,267 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:50:02,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:50:02,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470924994] [2021-07-13 20:50:02,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470924994] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:02,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14829208] [2021-07-13 20:50:02,268 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 20:50:02,286 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:50:02,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:50:02,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:50:02,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:50:02,388 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:50:02,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14829208] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:02,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:50:02,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 16 [2021-07-13 20:50:02,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239836286] [2021-07-13 20:50:02,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:50:02,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:50:02,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:50:02,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:50:02,389 INFO L87 Difference]: Start difference. First operand 39 states and 52 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:02,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:50:02,587 INFO L93 Difference]: Finished difference Result 75 states and 107 transitions. [2021-07-13 20:50:02,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:50:02,588 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:50:02,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:50:02,588 INFO L225 Difference]: With dead ends: 75 [2021-07-13 20:50:02,588 INFO L226 Difference]: Without dead ends: 68 [2021-07-13 20:50:02,589 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 226.6ms TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:50:02,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-07-13 20:50:02,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 43. [2021-07-13 20:50:02,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.380952380952381) internal successors, (58), 42 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:02,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 58 transitions. [2021-07-13 20:50:02,590 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 58 transitions. Word has length 27 [2021-07-13 20:50:02,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:50:02,590 INFO L482 AbstractCegarLoop]: Abstraction has 43 states and 58 transitions. [2021-07-13 20:50:02,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:02,590 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 58 transitions. [2021-07-13 20:50:02,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:50:02,590 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:50:02,590 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:50:02,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:50:02,801 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:50:02,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:50:02,801 INFO L82 PathProgramCache]: Analyzing trace with hash -291209033, now seen corresponding path program 42 times [2021-07-13 20:50:02,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:50:02,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976320917] [2021-07-13 20:50:02,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:50:02,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:50:02,856 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:50:02,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:50:02,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976320917] [2021-07-13 20:50:02,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976320917] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:02,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743292917] [2021-07-13 20:50:02,856 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:50:02,876 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:50:02,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:50:02,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:50:02,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:50:02,980 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-07-13 20:50:02,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743292917] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:50:02,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-13 20:50:02,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 18 [2021-07-13 20:50:02,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803800871] [2021-07-13 20:50:02,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:50:02,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:50:02,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:50:02,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:50:02,981 INFO L87 Difference]: Start difference. First operand 43 states and 58 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:03,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:50:03,014 INFO L93 Difference]: Finished difference Result 41 states and 56 transitions. [2021-07-13 20:50:03,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:50:03,015 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 20:50:03,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:50:03,015 INFO L225 Difference]: With dead ends: 41 [2021-07-13 20:50:03,015 INFO L226 Difference]: Without dead ends: 0 [2021-07-13 20:50:03,015 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 105.2ms TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:50:03,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-07-13 20:50:03,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-07-13 20:50:03,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:03,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-07-13 20:50:03,016 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2021-07-13 20:50:03,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:50:03,016 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-07-13 20:50:03,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:03,016 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-07-13 20:50:03,016 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-13 20:50:03,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:50:03,237 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-13 20:50:03,239 INFO L202 PluginConnector]: Adding new model easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.07 08:50:03 BasicIcfg [2021-07-13 20:50:03,239 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-13 20:50:03,240 INFO L168 Benchmark]: Toolchain (without parser) took 21024.89 ms. Allocated memory was 203.4 MB in the beginning and 293.6 MB in the end (delta: 90.2 MB). Free memory was 183.5 MB in the beginning and 115.7 MB in the end (delta: 67.8 MB). Peak memory consumption was 159.0 MB. Max. memory is 8.0 GB. [2021-07-13 20:50:03,240 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 203.4 MB. Free memory is still 184.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-13 20:50:03,240 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.80 ms. Allocated memory is still 203.4 MB. Free memory was 183.4 MB in the beginning and 182.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-13 20:50:03,240 INFO L168 Benchmark]: Boogie Preprocessor took 11.22 ms. Allocated memory is still 203.4 MB. Free memory was 182.0 MB in the beginning and 181.0 MB in the end (delta: 924.1 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-13 20:50:03,240 INFO L168 Benchmark]: RCFGBuilder took 180.08 ms. Allocated memory is still 203.4 MB. Free memory was 181.0 MB in the beginning and 171.4 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-07-13 20:50:03,240 INFO L168 Benchmark]: TraceAbstraction took 20808.24 ms. Allocated memory was 203.4 MB in the beginning and 293.6 MB in the end (delta: 90.2 MB). Free memory was 171.0 MB in the beginning and 115.7 MB in the end (delta: 55.3 MB). Peak memory consumption was 146.4 MB. Max. memory is 8.0 GB. [2021-07-13 20:50:03,240 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 0.12 ms. Allocated memory is still 203.4 MB. Free memory is still 184.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 20.80 ms. Allocated memory is still 203.4 MB. Free memory was 183.4 MB in the beginning and 182.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 11.22 ms. Allocated memory is still 203.4 MB. Free memory was 182.0 MB in the beginning and 181.0 MB in the end (delta: 924.1 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 180.08 ms. Allocated memory is still 203.4 MB. Free memory was 181.0 MB in the beginning and 171.4 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * TraceAbstraction took 20808.24 ms. Allocated memory was 203.4 MB in the beginning and 293.6 MB in the end (delta: 90.2 MB). Free memory was 171.0 MB in the beginning and 115.7 MB in the end (delta: 55.3 MB). Peak memory consumption was 146.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 37]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 28 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 20731.9ms, OverallIterations: 47, TraceHistogramMax: 5, EmptinessCheckTime: 41.1ms, AutomataDifference: 4929.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 18.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 828 SDtfs, 2526 SDslu, 2563 SDs, 0 SdLazy, 3856 SolverSat, 644 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2143.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1381 GetRequests, 880 SyntacticMatches, 29 SemanticMatches, 472 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1170 ImplicationChecksByTransitivity, 3429.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=339occurred in iteration=37, InterpolantAutomatonStates: 496, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 298.9ms AutomataMinimizationTime, 47 MinimizatonAttempts, 2877 StatesRemovedByMinimization, 45 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 97.1ms SsaConstructionTime, 362.0ms SatisfiabilityAnalysisTime, 4477.3ms InterpolantComputationTime, 1840 NumberOfCodeBlocks, 1814 NumberOfCodeBlocksAsserted, 173 NumberOfCheckSat, 1750 ConstructedInterpolants, 0 QuantifiedInterpolants, 7124 SizeOfPredicates, 59 NumberOfNonLiveVariables, 1583 ConjunctsInSsa, 347 ConjunctsInUnsatCore, 90 InterpolantComputations, 9 PerfectInterpolantSequences, 584/1205 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...